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WO1992001033A1 - Procede de demetallisation d'huiles - Google Patents

Procede de demetallisation d'huiles Download PDF

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Publication number
WO1992001033A1
WO1992001033A1 PCT/GB1991/001012 GB9101012W WO9201033A1 WO 1992001033 A1 WO1992001033 A1 WO 1992001033A1 GB 9101012 W GB9101012 W GB 9101012W WO 9201033 A1 WO9201033 A1 WO 9201033A1
Authority
WO
WIPO (PCT)
Prior art keywords
oil
oils
heating
temperature
demetalizing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/GB1991/001012
Other languages
English (en)
Inventor
Misha Friedman
Giora Honig
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
FREED ARTHUR WOOLF
Original Assignee
FREED ARTHUR WOOLF
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by FREED ARTHUR WOOLF filed Critical FREED ARTHUR WOOLF
Publication of WO1992001033A1 publication Critical patent/WO1992001033A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M175/00—Working-up used lubricants to recover useful products ; Cleaning
    • C10M175/0016—Working-up used lubricants to recover useful products ; Cleaning with the use of chemical agents

Definitions

  • the present invention relates to a process for
  • demetalizing oils which is based on the reaction of the oil to be demetalized and an aqueous diluted
  • ammonium hydrogen sulfate solution containing oxalic acid to which ethoxynonane is added ammonium hydrogen sulfate solution containing oxalic acid to which ethoxynonane is added.
  • the process according to the present invention comprises the characterizing steps as follows of: a) heating the oil to be demetalized to a temperature Of from 70oC to 130oC; b) heating an aqueous solution containing 3 to 6 per cent in weight of ammonium hydrogen sulfate and 1 to 5 per cent in weight of oxalic acid to a temperature higher than 70oC; c) adding ethoxynonane heated to a minimal temperature of 80oC to the solution b); d) intensive mixing of the oil obtained in a) and the heated solution obtained in c) and separating the phase while the system is maintained at a
  • Table 1 shows the main properties of an oil before being treated by the process according to this invention, and of the finished product.
  • the demetalization does not modify the characteristics of the treated oil excepting the decrease of its metal content and therefore its ash content. According to an experimental run with approximately 50, 000 litres of oil containing about 3000 ppm of lead and about 1, 5% in weight of ashes, a treated oil having the properties as shown on Table II was obtained.
  • the treated oil is of a dark reddish colour and it is clear when viewed through thin layers. It is equivalent to a high quality heavy fuel oil because its sulphur content is lower than 1% and does not contain any asphaltic component. Due to its stronger paraffinic nature when compared with the heavy fuel oils, its heating power is 3 to 5% higher.
  • the treated oil contains water (generally less than 1%), light
  • the subsequent treatment comprises several steps carried out sequentially or according to different combinations: sedimentation, stripping with stream, caustic extraction, and filtration.
  • a settling vessel For the sedimentation, a settling vessel is used, a residence time of at least 24 hours being recommended. As it is convenient to keep a high temperature, the settling vessel must be provided with a heating jacket.
  • the main purpose of the stripping step is the removal of the residual water and light components/solvents.
  • the treated oil must be heated previously at 110-120oC and 30 to 40 kg of steam by metric ton of treated oil must be injected.
  • the success of the stripping step can be checked measuring the flash point of the oil after the treatment, which must be a minimum value of 60oC if it will be used as a fuel oil.
  • the oil after being stripped can be pumped through heating coils located inside the settling vessel so that it provides the necessary heat.
  • the oil For removing the acidic components, the oil must be extracted with a caustic soda solution. Afterwards, the oil must be separated from the treatment solution. This separation is made on a settler, a time of residence of 2 to 3 hours being sufficient.
  • a 2% aqueous caustic soda solution is used and a ratio of caustic solution and oil of 1:4 is preferred.
  • the treated oil is to be used as a fuel oil, its maximum content of sodium is 15 ppm, and therefore it must be washed with water containing 0, 5% in weight of sulfuric acid.
  • the filtration is the best way for removing the residual precipitate from the treated oil.
  • treated oils are very difficult to filter due to the small size of the precipitate particles (under 1 micron).
  • the Applicant found that through a heating step from 130 to 140oC, the precipitate coagulates and the filtration of the oil becomes rather easy.
  • the dimensions of the heating vessel must provide a residence time of about 1 hour.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Organic Chemistry (AREA)
  • Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)

Abstract

La présente invention se rapporte à un procédé de démétallisation d'huiles qui consiste à chauffer l'huile devant être démétallisée, à chauffer une solution diluée aqueuse de sulfate d'hydrogène d'ammonium contenant de l'acide oxalique, à ajouter de l'éthoxynonane tout en maintenant une température d'au moins 80 °C, à mélanger entièrement et à séparer les phases alors que le système est maintenu à une température supérieure à 80 °C.
PCT/GB1991/001012 1990-07-04 1991-06-21 Procede de demetallisation d'huiles Ceased WO1992001033A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
PT94582A PT94582A (pt) 1990-07-04 1990-07-04 Processo para a desmetalizacao de oleos
PT94582 1990-07-04

Publications (1)

Publication Number Publication Date
WO1992001033A1 true WO1992001033A1 (fr) 1992-01-23

Family

ID=20084760

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB1991/001012 Ceased WO1992001033A1 (fr) 1990-07-04 1991-06-21 Procede de demetallisation d'huiles

Country Status (4)

Country Link
AU (1) AU8074191A (fr)
PT (1) PT94582A (fr)
WO (1) WO1992001033A1 (fr)
ZA (1) ZA913884B (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996000273A1 (fr) * 1994-06-23 1996-01-04 Corex Technologies (1993) Ltd. Procede de recuperation d'huiles lubrifiantes usees
ES2141662A1 (es) * 1997-07-21 2000-03-16 Descontaminacion Y Eliminacion Procedimiento e instalacion para la desmetalizacion de aceites usados para su empleo como combustible.

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR848356A (fr) * 1938-07-08 1939-10-27 Procédé de traitement et de régénération des huiles minérales usagées
FR895373A (fr) * 1943-02-23 1945-01-23 Procédé pour le raffinage et la régénération des huiles de graissage et autres, neuves et usées
EP0009935A1 (fr) * 1978-09-28 1980-04-16 A.L. Salusinszky And Associates (Proprietary) Ltd. Procédé pour l'élimination des métaux et de l'eau de l'huile lubrifiante hydrocarbonée usée

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR848356A (fr) * 1938-07-08 1939-10-27 Procédé de traitement et de régénération des huiles minérales usagées
FR895373A (fr) * 1943-02-23 1945-01-23 Procédé pour le raffinage et la régénération des huiles de graissage et autres, neuves et usées
EP0009935A1 (fr) * 1978-09-28 1980-04-16 A.L. Salusinszky And Associates (Proprietary) Ltd. Procédé pour l'élimination des métaux et de l'eau de l'huile lubrifiante hydrocarbonée usée

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996000273A1 (fr) * 1994-06-23 1996-01-04 Corex Technologies (1993) Ltd. Procede de recuperation d'huiles lubrifiantes usees
ES2141662A1 (es) * 1997-07-21 2000-03-16 Descontaminacion Y Eliminacion Procedimiento e instalacion para la desmetalizacion de aceites usados para su empleo como combustible.

Also Published As

Publication number Publication date
PT94582A (pt) 1992-01-31
AU8074191A (en) 1992-02-04
ZA913884B (en) 1992-03-25

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