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US2658026A - Bituminous materials and the method of preparing the same - Google Patents

Bituminous materials and the method of preparing the same Download PDF

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US2658026A
US2658026A US233946A US23394651A US2658026A US 2658026 A US2658026 A US 2658026A US 233946 A US233946 A US 233946A US 23394651 A US23394651 A US 23394651A US 2658026 A US2658026 A US 2658026A
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spot test
asphaltic
petroleum
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negative
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Frederick H Maclaren
Mathew L Kalinowski
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Standard Oil Co
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Standard Oil Co
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    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10C—WORKING-UP PITCH, ASPHALT, BITUMEN, TAR; PYROLIGNEOUS ACID
    • C10C3/00—Working-up pitch, asphalt, bitumen
    • C10C3/005—Working-up pitch, asphalt, bitumen by mixing several fractions (also coaltar fractions with petroleum fractions)

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  • This invention relates to improved homogeneous bituminous materials and to the method of obtaining the same, and more specifically the invention pertains to homogeneous bituminous materials, e. g., asphalts, having a negative spot test, and to the method of obtaining the same from a bituminous material normally having a positive spot test.
  • Bituminous materials such as asphalts, cutback asphalts and road oil residuums, used in the construction of asphaltic roadways and for other purposes are frequently required to pass a test which is indicative of the homogeneity of the product used.
  • This test popularly known as the spot test, is often referred to as the Oliensis test and less frequently a the homogeneity test. This test (fully described in the A. S. T. M. Proceedings, volume 33, part II [1933], A. S. T. M.
  • the flask and contents may be warmed and when the sample appears to be dissolved, the flask is set aside for thirty minutes and permitted to cool to room temperature.
  • the contents of the flask are mixed by vigorously swirling the flask and three drops of the solution placed on a clean Whatman filter paper, care being taken that the spots do not run together. After five minutes, the spots are examined in a good difiused light. If the drops form a brown or yellowish circular stain with a darker solid or annular nucleus in thecenter, the spot .test is reported as positive and the solution in the flask is discarded. However, if the drops form a uniformly brown circular stain, it is reported as negative and the filter paper preserved for subsequent comparative test purposes.
  • the flask containing the solution of bituminous materials being tested is stoppered and set aside out of strong light for a period of twenty-four hours. At the end of this period the solution is again mixed and stirred with aclean glass rod. Three more drops of the solution are then placed on the filter paper previously used, and after five minutes, examined. If the drops from the twenty-four hour old solution still form a uniformly brown circular stain, the spot test is said to be negative. However, if the drops form a brown or yellowish brown circular stain with a darker solid or an annular nucleus, the spot test is reported as positive. In order to meet specifications, the bituminous material being tested must show a negative spot test. At times the bituminous material having a negative spot test will be referred to and classified as homogeneous While the product which has a positive spot test will be referred to and classified as heterogeneous.
  • Another object of the invention is to provide a negative spot test bituminous composition containing a bituminous material normally having a positive spot test.
  • a further object of z the invention is to provide a homogeneous asphalt having a negative spot test employing as a major component thereof a bituminous material normally having a positive spot test.
  • a still further object of the invention is to provide a methodof correcting heterogeneity in asphaltic materials.
  • Still another object of the invention is to provide a method for converting positive spot test asphaltic materials to negative spot test asphaltic materials.
  • bituminous materials such as asphalts, cut-back asphalts and other crude petroleum residuum, which normally exhibit a positive spot test when subjected to the hereindescribed' test, are con v verted to products which will give a negative spot test by the addition of a small but sufficient quantity of the propane-insoluble asphaltic resins obtained in the propane deasphalting of a reduced crude petroleum oil, normally havin a negative spot test.
  • propane-insoluble asphaltic resins obtained in the propane deasphalting of a reduced crude petroleum oil, normally havin a negative spot test.
  • mateprocess is a liquid-liquid I extraction process involving the contacting of the reduced crude oil or residuum with liquefied propane, separating of the resultant propane-oil and the propane-insoluble asphaltic resin phases and the recovery of the propane therefrom.
  • extraction with the liquefied propane may be carried out either stagewise or countercurrently.
  • a propane to oil charge ratio of from about 1.5 to about 5 parts of propane to each part. of oil charged is employed, using temperatures in the range of from about 100 F. to about 150 F., and pressures within the range of from about 200 to about 500 pounds per square inch gauge.
  • the process for the deasphalting of reduced petroleum oils is well known and is described in U. S. Patents Nos. 1,944,491; 1,949,989; 2,041,275; 2,081,473, and others.
  • propane is the material usually used in conventional deasphalting processes
  • other lique fied normally gaseous hydrocarbons such as methane, ethane and butane can be used.
  • propane-insoluble asphaltic resins obtained by the propane deasphalting from any 18% to reduced crude oil can be satisiactorily employed for the-hereinedescribed invention provided the reduced crude exhibits a negative spot test.
  • the herein described invention is not limited tov the propane-insoluble asphaltic resins from 18% to 40% reduced crude, but includes the use of asphaltic material from any process in which a liquefied normally gaseous hydrocarbon is employed to precipitate insoluble asphaltic resins from a reduced crude petroleum il or petroleum residuums which exhibits a negative spot test.
  • the present invention provides a method. for correcting the heterogeneity of any asphalt and/or residuum whereby such materials are converted from a positive spot test product to a negativespot test product.
  • asphaltic resins of the type herein described are" effectivein correcting the heterogeneity of any oxidized or unoxidized, asphalt, or residuum, such as for.- example, positive spot test asphalts and residuums from low sulfur Mid-Continent crudeoils. low sulfur Mid-Continnent-type crude oils, high sulfur West Texas crude oils, high sulfur Wyoming crude oils, and others.
  • EXAMPLE I An asphalt, obtained by reducing 38% West Texas crude oil residuum to an asphaltic bottoms having a softening point of 100 F. to 110 F., exhibited a positive spot test. To portions of this asphalt were added 0.5%, 1%, and 2% of propane-insoluble asphaltic resins obtained by propane deasphalting a 25% reduced bottoms of a Mid-Continent crude oil of low sulfur content. The asphaltic resin had a softening point of about 117 F., a penetration at 77 F. of about 65, and a flash (C. O. C.) of about 480 F. Each of the resultant blends exhibited a negative spot test.
  • EXAMPLE II EXAMPLE IV
  • the residuum of Example III when mixed with 10 of the propaneinsoluble asphaltic resin havingthe following inspection gave a product having a negative spot test.
  • EXAMPLE V A blend of 85% of a. residuum from a high sulfur Wyoming crude oil and 15% of a residuum from a Steamboat Butte Tensleep which, had a.
  • petroleum bitumen composition such as asphalts, cut-back asphalts, road oils, and the like, used for paving and road building
  • additives such as anti-stripping agents.
  • additives are used to facilitate the application of paving materials and road oils to wet mineral aggregates and to prevent the stripping of such materials from wet aggregates.
  • additives are metal salts of sulfonic acids, naphthenic acid, high molecular Weight fatty acids, as well as fats and fatty material, such as the propane-insoluble residue obtained from the propane fractionation of crude fatty materials.
  • Particularly effective additives are calcium petroleum sulfonates.
  • the method of converting a positive spot test petroleum bitumen material to a negative spot test product comprising admixing with a petroleum bitumen material normally having a positive spot test, an untreated asphaltic resin insoluble in a liquefied normally gaseous hydrocarbon obtained from the deasphalting of a petroleum residuum normally exhibiting a negative spot test with a liquefied normally gaseous hydrocarbon, said untreated asphaltic resin being present in a small but sufficient quantity to give the resultant product a negative spot test.
  • the method of converting a positive spot test petroleum asphaltic material to a negative spot test product comprising admixing a petroleum asphaltic material normally exhibiting a positive spot test with an untreated propaneinsoluble asphaltic resin obtained from the propane deasphalting of a petroleum residuum normally exhibiting a negative spot test, said propane-insoluble asphaltic resin being used in small but suflicient quantities to impart to said petroleum asphaltic material a negative spot test.
  • the method of preparing a petroleum asphaltic product having a negative spot test comprising admixing a petroleum asphaltic material normally having a positive spot test with from about 0.5% to about 15%, by weight, of untreated propane-insoluble asphaltic resins, obtained from petroleum residuums normally having a negative spot test.
  • the method of converting a positive spot test asphalt to a negative spot test asphalt comprising incorporating in a positive spot test asphalt from about 0.5% to about 15%, by weight, of untreated propane-insoluble asphaltic resins obtained by propane deasphalting a petroleum residuum normally having a negative spot test.
  • a petroleum asphaltic composition having a negative spot test comprising a major proportion of a petroleum asphaltic material normally having a positive spot test and a minor proportion of untreated asphaltic resins insoluble in liquefied normally gaseous hydrocarbons obtained from the deasphalting of a bitumen residuum normally having a negative spot test with a liquefied normally gaseous hydrocarbon, said asphaltic resins being present in small but sufficient quantities to impart to said composition a negative spot test.
  • a petroleum bitumen composition having a negative spot test comprising a major proportion of a petroleum bitumen normally having a positive spot test and from about 0.5% to about 15%, by weight, of an untreated propane-insoluble asphaltic resin obtained in the propane deasphalting of a bitumen residuum normally having a negative spot test.
  • a petroleum asphalt composition having a negative spot test comprising a major proportion of a petroleum asphalt normally having a positive spot test and. from 0.5% to about 15%, by weight, of untreated propane-insoluble asphaltic resins obtained by the propane deasphalting of a petroleum residuum normally having a negative spot test.
  • a road oil composition having a negative spot test comprising a major proportion of a petroleum residuum normally having a positive spot test and from about 0.5% to about 15%, by weight, of an untreated propane-insoluble asphaltic resin obtained by the propane deasphalting of a petroleum residuum normally having a negative spot test.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
  • Working-Up Tar And Pitch (AREA)

Description

Patented Nov. 3, 1953 BITUMINOUS MATERIALS AND THE METH- OD OF PREPARING THE SAME Frederick H. MacLaren, Munster, Ind., and Mathew L. Kalinowski, Chicago, Ill., assignors to Standard Oil Company, Chicago, 111., a corporation of Indiana N Drawing. Application June 27, 1951, Serial No. 233,946
Claims. (Cl. 19622) This invention relates to improved homogeneous bituminous materials and to the method of obtaining the same, and more specifically the invention pertains to homogeneous bituminous materials, e. g., asphalts, having a negative spot test, and to the method of obtaining the same from a bituminous material normally having a positive spot test.
Bituminous materials, such as asphalts, cutback asphalts and road oil residuums, used in the construction of asphaltic roadways and for other purposes are frequently required to pass a test which is indicative of the homogeneity of the product used. This test, popularly known as the spot test, is often referred to as the Oliensis test and less frequently a the homogeneity test. This test (fully described in the A. S. T. M. Proceedings, volume 33, part II [1933], A. S. T. M. Proceedings, volume 36, part II [1936] in Abraham Asphalts and Allied Substances, page 782 [Test 2D], and in American Association State Highway Oificials, Standard Specifications for Highway Materials and Method of Sampling and Testing, part II, Designation T102-42 [1942]) is carried out in the following manner: Two grams of the bituminous materials to be tested are placed in a flask and dissolved in 10.2 cc. of a special naphtha, designated Spot Test Naphtha, meeting the following requirements:
A. P. I. gravity 49-50. Initial boiling point Not less than 300 F. 50% distillation point 335 F. to 355 F. End point Not over 410 F. Aniline number (A. S. T. M.
91-33) 59 C. to 63 C.
The flask and contents may be warmed and when the sample appears to be dissolved, the flask is set aside for thirty minutes and permitted to cool to room temperature. The contents of the flask are mixed by vigorously swirling the flask and three drops of the solution placed on a clean Whatman filter paper, care being taken that the spots do not run together. After five minutes, the spots are examined in a good difiused light. If the drops form a brown or yellowish circular stain with a darker solid or annular nucleus in thecenter, the spot .test is reported as positive and the solution in the flask is discarded. However, if the drops form a uniformly brown circular stain, it is reported as negative and the filter paper preserved for subsequent comparative test purposes. The flask containing the solution of bituminous materials being tested is stoppered and set aside out of strong light for a period of twenty-four hours. At the end of this period the solution is again mixed and stirred with aclean glass rod. Three more drops of the solution are then placed on the filter paper previously used, and after five minutes, examined. If the drops from the twenty-four hour old solution still form a uniformly brown circular stain, the spot test is said to be negative. However, if the drops form a brown or yellowish brown circular stain with a darker solid or an annular nucleus, the spot test is reported as positive. In order to meet specifications, the bituminous material being tested must show a negative spot test. At times the bituminous material having a negative spot test will be referred to and classified as homogeneous While the product which has a positive spot test will be referred to and classified as heterogeneous.
It is an object of the present invention to pro-' vide a bituminous composition having a negative spot test. Another object of the invention is to provide a negative spot test bituminous composition containing a bituminous material normally having a positive spot test. A further object of z the invention is to provide a homogeneous asphalt having a negative spot test employing as a major component thereof a bituminous material normally having a positive spot test. A still further object of the invention is to provide a methodof correcting heterogeneity in asphaltic materials. Still another object of the invention is to provide a method for converting positive spot test asphaltic materials to negative spot test asphaltic materials. Other objects and advantages of the pres-' ent invention will become apparent from the following description thereof. In accordance with the present invention bituminous materials,- such as asphalts, cut-back asphalts and other crude petroleum residuum, which normally exhibit a positive spot test when subjected to the hereindescribed' test, are con v verted to products which will give a negative spot test by the addition of a small but sufficient quantity of the propane-insoluble asphaltic resins obtained in the propane deasphalting of a reduced crude petroleum oil, normally havin a negative spot test. We have found that as little as 0.5%, by weight, of these asphaltic resins will convert a normally positive spot test bituminous material to a negative spot test product. Usually, from about 0.5% to about 15% of the propane-insolubleasphaltic resins will be found suflficient for the purpose herein described; although, larger quantitles, such as %.t0 40%, can be used so long as the desired properties of the bituminous. mateprocess, well known in the art, is a liquid-liquid I extraction process involving the contacting of the reduced crude oil or residuum with liquefied propane, separating of the resultant propane-oil and the propane-insoluble asphaltic resin phases and the recovery of the propane therefrom. The
extraction with the liquefied propane may be carried out either stagewise or countercurrently. In conventional processes for the deasphalting of reduced petroleum crude oils a propane to oil charge ratio of from about 1.5 to about 5 parts of propane to each part. of oil charged is employed, using temperatures in the range of from about 100 F. to about 150 F., and pressures within the range of from about 200 to about 500 pounds per square inch gauge. The process for the deasphalting of reduced petroleum oils is well known and is described in U. S. Patents Nos. 1,944,491; 1,949,989; 2,041,275; 2,081,473, and others. While liquefied propane is the material usually used in conventional deasphalting processes, other lique fied normally gaseous hydrocarbons, such as methane, ethane and butane can be used. We have found that the propane-insoluble asphaltic resins obtained by the propane deasphalting from any 18% to reduced crude oil can be satisiactorily employed for the-hereinedescribed invention provided the reduced crude exhibits a negative spot test. The herein described invention, however, is not limited tov the propane-insoluble asphaltic resins from 18% to 40% reduced crude, but includes the use of asphaltic material from any process in which a liquefied normally gaseous hydrocarbon is employed to precipitate insoluble asphaltic resins from a reduced crude petroleum il or petroleum residuums which exhibits a negative spot test.
.The present invention provides a method. for correcting the heterogeneity of any asphalt and/or residuum whereby such materials are converted from a positive spot test product to a negativespot test product. We have found the asphaltic resins of the type herein described are" effectivein correcting the heterogeneity of any oxidized or unoxidized, asphalt, or residuum, such as for.- example, positive spot test asphalts and residuums from low sulfur Mid-Continent crudeoils. low sulfur Mid-Continnent-type crude oils, high sulfur West Texas crude oils, high sulfur Wyoming crude oils, and others.
The effectiveness of asphaltic resins of the type herein described inconverting positive spot test bitumen materials to negative spot test prod ucts is illustrated by the following examples which are given by way of illustrating the invention, and are not to be construed as limiting the scope thereof.
EXAMPLE I An asphalt, obtained by reducing 38% West Texas crude oil residuum to an asphaltic bottoms having a softening point of 100 F. to 110 F., exhibited a positive spot test. To portions of this asphalt were added 0.5%, 1%, and 2% of propane-insoluble asphaltic resins obtained by propane deasphalting a 25% reduced bottoms of a Mid-Continent crude oil of low sulfur content. The asphaltic resin had a softening point of about 117 F., a penetration at 77 F. of about 65, and a flash (C. O. C.) of about 480 F. Each of the resultant blends exhibited a negative spot test.
EXAIVIPLE II An asphalt having a softening point of F. to F., obtained by the reduction of a West Texas crude oil of high sulfur content and which exhibited a positive. spot test was blended as in Example I with 0.5%, 1% and 5% of asphaltic resins of the type used in Example I. The results obtained are shown in the following table:
Table I Sample Spot Test West Texas Asphalt Positive. West Texas Asphalt+0.5% Propane-Insoluble Asphaltlc Do.
Resin. West Texas Asphalt+l.0% Propane-Insoluble Asphaltlc Dc.
esin. Wr st Texas Aspha1t+5.0% Propane-Insoluble Asphaltic Nelativn.
esm.
The spot test of this West Texas asphalt was more severely "positive than that of Example I and therefore required a larger amount of the propane-insoluble asphaltic resin to convert it to a product having a negative spot test.
EXAMPLE II EXAMPLE IV The residuum of Example III when mixed with 10 of the propaneinsoluble asphaltic resin havingthe following inspection gave a product having a negative spot test.
Softening point 174 1.
Penetration at 77 F.. 4.
Flash (C. O. C.) "31",. 580" F.
EXAMPLE V A blend of 85% of a. residuum from a high sulfur Wyoming crude oil and 15% of a residuum from a Steamboat Butte Tensleep which, had a.
positive spot test was converted to a product having a negative spot test by the addition of 5% of the propane-insoluble asphaltic resin of the type used in Example 1V.
EXAMPLE VI Blends consisting of 70% of the Wyoming crude oil residuum and 30% of the Steamboat residuum and blends of 60% of the Wyoming residuum and 40% of the Steamboat residuum, each showing a positive spot test were converted to products having a negative spot testby the addition of 10% of the asphaltlc resin 0! Example IV. The
To determine the effectiveness of the present invention in correcting the spot test of cracked asphalts a continuous pressure still cracked residuum having an A. P. I. gravity of 7.8", a flash of 340 F., a Furol viscosity at 122 F. of 227 seconds, and a pourpoint of +35 F. and showing a positive spot test was admixed with various amounts of a propane insoluble asphaltic resin of the type used in Example I. It was found that 70% of the propane-insoluble asphaltic resin was required to obtain a negative spot test. While a relatively large amount of the asphaltic resin was required, it is unexpected that a negative spot test can be obtained at all on an asphalt containing as much as 30% of a cracked product since the spot test was originally designed to indicate the presence of any cracked products in asphaltic materials.
Frequently, petroleum bitumen composition, such as asphalts, cut-back asphalts, road oils, and the like, used for paving and road building, are compounded with various additives, such as anti-stripping agents. Such additives are used to facilitate the application of paving materials and road oils to wet mineral aggregates and to prevent the stripping of such materials from wet aggregates. Examples of such additives are metal salts of sulfonic acids, naphthenic acid, high molecular Weight fatty acids, as well as fats and fatty material, such as the propane-insoluble residue obtained from the propane fractionation of crude fatty materials. Particularly effective additives are calcium petroleum sulfonates. In many cases difiiculty is experienced in keeping such additives in stable suspension or solution, in the bitumen material. We have found that the addition of up to 35%, by weight, of the asphaltic resins insoluble in liquefied normally gaseous hydrocarbons, for example, propane, is very efiective in stabilizing such compositions against separation of the anti-stripping agents.
While we have described our invention by reference to specific examples thereof, these have been by way of illustration only and the invention is not to be limited thereby but includes Within the scope such modifications and variations as come within the spirit of the appended claims.
We claim:
1. The method of converting a positive spot test petroleum bitumen material to a negative spot test product, comprising admixing with a petroleum bitumen material normally having a positive spot test, an untreated asphaltic resin insoluble in a liquefied normally gaseous hydrocarbon obtained from the deasphalting of a petroleum residuum normally exhibiting a negative spot test with a liquefied normally gaseous hydrocarbon, said untreated asphaltic resin being present in a small but sufficient quantity to give the resultant product a negative spot test.
2. The method of converting a positive spot test petroleum asphaltic material to a negative spot test product, comprising admixing a petroleum asphaltic material normally exhibiting a positive spot test with an untreated propaneinsoluble asphaltic resin obtained from the propane deasphalting of a petroleum residuum normally exhibiting a negative spot test, said propane-insoluble asphaltic resin being used in small but suflicient quantities to impart to said petroleum asphaltic material a negative spot test.
3. The method of claim 2 in which the propaneinsoluble asphaltic resin is used in amounts within 6 the range of from about 0.5% to about 15%, by weight.
4. The method of correcting the heterogeneity of a petroleum asphaltic material comprising admixing with a petroleum asphaltic material normally having a positive spot test, from about 0.5% to about 15%, by weight, of untreated propane-insoluble asphaltic resins obtained in the propane deasphalting of a petroleum residuum normally exhibiting a negative spot test.
5. The method of preparing a petroleum asphaltic product having a negative spot test comprising admixing a petroleum asphaltic material normally having a positive spot test with from about 0.5% to about 15%, by weight, of untreated propane-insoluble asphaltic resins, obtained from petroleum residuums normally having a negative spot test.
6. The method of converting a positive spot test asphalt to a negative spot test asphalt, comprising incorporating in a positive spot test asphalt from about 0.5% to about 15%, by weight, of untreated propane-insoluble asphaltic resins obtained by propane deasphalting a petroleum residuum normally having a negative spot test.
7. A petroleum asphaltic composition having a negative spot test comprising a major proportion of a petroleum asphaltic material normally having a positive spot test and a minor proportion of untreated asphaltic resins insoluble in liquefied normally gaseous hydrocarbons obtained from the deasphalting of a bitumen residuum normally having a negative spot test with a liquefied normally gaseous hydrocarbon, said asphaltic resins being present in small but sufficient quantities to impart to said composition a negative spot test.
8. A petroleum bitumen composition having a negative spot test comprising a major proportion of a petroleum bitumen normally having a positive spot test and from about 0.5% to about 15%, by weight, of an untreated propane-insoluble asphaltic resin obtained in the propane deasphalting of a bitumen residuum normally having a negative spot test.
9. A petroleum asphalt composition having a negative spot test comprising a major proportion of a petroleum asphalt normally having a positive spot test and. from 0.5% to about 15%, by weight, of untreated propane-insoluble asphaltic resins obtained by the propane deasphalting of a petroleum residuum normally having a negative spot test.
10. A road oil composition having a negative spot test comprising a major proportion of a petroleum residuum normally having a positive spot test and from about 0.5% to about 15%, by weight, of an untreated propane-insoluble asphaltic resin obtained by the propane deasphalting of a petroleum residuum normally having a negative spot test.
FREDERICK H. MACLAREN. MATHEW L. KALINOWSKI.
References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 2,073,088 Anderson et al Mar. 9, 1937 2,131,205 Wells et al Sept. 27, 1938 2,220,714 Hersberger Nov. 5, 1940 2,224,372 Anderson Dec. 10, 1940 2,317,150 Lovell et a1 Apr. 20, 1943

Claims (2)

1. THE METHOD OF CONVERTING A POSITIVE SPOT TEST PETROLEUM BITUMEN MATERIAL TO A NAGATIVE SPOT TEST PRODUCT, COMPRISING ADMIXING WITH A PETROLEUM BUTUMEN MATERIAL NORMALLY HAVING A POSITIVE SPOT TEST, AND UNTREATED ASPHALTIC RESIN INSOLUBLE IN A LIQUEFIED NORMALLY GASEOUS HYDROCARBON OBTAINED FROM THE DEASPHALTING OF A PETROLEUM RESIDUUM NORMALLY EXHIBITING A NEGATIVE SPOT TEST WITH A LIQUEFIED NORMALLY GASEOUS HYDROCARBON, SAID UNTREATED ASPHALTIC RESIN BEING PRESENT IN A SMALL BUT SUFFICIENT QUANTITY TO GIVE THE RESULTANT PRODUCT A NEGATIVE SPOT TEST.
7. A PETROLEUM ASPHALTIC COMPOSITION A MAJOR PROPORTION NEGATIVE SPOT TEST COMPRISING A MAJOR PROPORTION OF A PETROLEUM ASPHALTIC MATERIAL NORMALLY HAVING A POSITIVE SPOT TEST AND A MINOR PROPORTION OF UNTREATED ASPHALTIC RESINS INSOLUBLE IN LIQUEFIED NORMALLY GASEOUS HYDROCARBONS OBTAINED FROM THE DEASPHATING OF A BITUMEN RESIDUUM NORMALLY HAVING A NEGATIVE SPOT TEST WITH A LUQUFIED NORMALLY GASEOUS HYDROCARBON, SAID ASPHALTIC RESINS BEING PRESENT IN SMALL BUT SUFFICIENT QUANTITIES TO IMPACT TO SAID COMPOSITION A NEGATIVE SPOT TEST.
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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2822282A (en) * 1955-09-29 1958-02-04 Kerr Mc Gee Oil Ind Inc Method of converting non-homogeneous asphalt to homogeneous asphalt and product
US2903412A (en) * 1955-12-16 1959-09-08 Pure Oil Co Oliensis negative asphalt production
US2980601A (en) * 1958-06-12 1961-04-18 Coast Paint And Lacquer Compan Coal tar modified amine type curing agent for polyepoxides
US3322706A (en) * 1962-06-11 1967-05-30 Continental Oil Co Asphalt compositions and method of improving spot testing to select asphalts
US3341344A (en) * 1965-03-02 1967-09-12 Henry H Ginsberg Road binder and surface coating from coal
US3939004A (en) * 1972-02-01 1976-02-17 Exxon Research And Engineering Company Asphalt paving compositions from positive spot asphalt fractions
US4777064A (en) * 1987-06-02 1988-10-11 Stone Eugene M Method of reducing penetration of paving grade asphalts and applying the product to a granular material
US4851260A (en) * 1987-06-02 1989-07-25 Stone Eugene M Process for producing a penetrative asphaltic binder and applying the binder to a granular material

Citations (5)

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US2073088A (en) * 1935-04-03 1937-03-09 Shell Dev Preparation of high grade asphalts
US2131205A (en) * 1935-04-05 1938-09-27 Standard Oil Dev Co Method of modifying properties of asphalts
US2220714A (en) * 1938-06-14 1940-11-05 Atlantic Refining Co Production of asphalt
US2224372A (en) * 1938-05-18 1940-12-10 Shell Dev Process for the manufacture of asphalt from waxy mineral oils
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US2822282A (en) * 1955-09-29 1958-02-04 Kerr Mc Gee Oil Ind Inc Method of converting non-homogeneous asphalt to homogeneous asphalt and product
US2903412A (en) * 1955-12-16 1959-09-08 Pure Oil Co Oliensis negative asphalt production
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US3341344A (en) * 1965-03-02 1967-09-12 Henry H Ginsberg Road binder and surface coating from coal
US3939004A (en) * 1972-02-01 1976-02-17 Exxon Research And Engineering Company Asphalt paving compositions from positive spot asphalt fractions
US4777064A (en) * 1987-06-02 1988-10-11 Stone Eugene M Method of reducing penetration of paving grade asphalts and applying the product to a granular material
US4851260A (en) * 1987-06-02 1989-07-25 Stone Eugene M Process for producing a penetrative asphaltic binder and applying the binder to a granular material

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