[go: up one dir, main page]

GB1184094A - A Process for the preparation of Dispersions of Pyrogenic Silica - Google Patents

A Process for the preparation of Dispersions of Pyrogenic Silica

Info

Publication number
GB1184094A
GB1184094A GB1041667A GB1041667A GB1184094A GB 1184094 A GB1184094 A GB 1184094A GB 1041667 A GB1041667 A GB 1041667A GB 1041667 A GB1041667 A GB 1041667A GB 1184094 A GB1184094 A GB 1184094A
Authority
GB
United Kingdom
Prior art keywords
silica
aliphatic
ethylamine
march
dispersion
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.)
Expired
Application number
GB1041667A
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.)
Evonik Operations GmbH
Original Assignee
Degussa GmbH
Deutsche Gold und Silber Scheideanstalt
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 Degussa GmbH, Deutsche Gold und Silber Scheideanstalt filed Critical Degussa GmbH
Publication of GB1184094A publication Critical patent/GB1184094A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B33/00—Silicon; Compounds thereof
    • C01B33/113—Silicon oxides; Hydrates thereof
    • C01B33/12—Silica; Hydrates thereof, e.g. lepidoic silicic acid
    • C01B33/14—Colloidal silica, e.g. dispersions, gels, sols
    • C01B33/145—Preparation of hydroorganosols, organosols or dispersions in an organic medium
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B33/00—Silicon; Compounds thereof
    • C01B33/113—Silicon oxides; Hydrates thereof
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B33/00—Silicon; Compounds thereof
    • C01B33/113—Silicon oxides; Hydrates thereof
    • C01B33/12—Silica; Hydrates thereof, e.g. lepidoic silicic acid
    • C01B33/14—Colloidal silica, e.g. dispersions, gels, sols
    • C01B33/141—Preparation of hydrosols or aqueous dispersions
    • C01B33/1415—Preparation of hydrosols or aqueous dispersions by suspending finely divided silica in water
    • C01B33/1417—Preparation of hydrosols or aqueous dispersions by suspending finely divided silica in water an aqueous dispersion being obtained
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D30/00—Producing pneumatic or solid tyres or parts thereof
    • B29D30/06—Pneumatic tyres or parts thereof (e.g. produced by casting, moulding, compression moulding, injection moulding, centrifugal casting)
    • B29D30/08—Building tyres
    • B29D30/20—Building tyres by the flat-tyre method, i.e. building on cylindrical drums
    • B29D30/32—Fitting the bead-rings or bead-cores; Folding the textile layers around the rings or cores
    • B29D2030/3214—Locking the beads on the drum; details of the drum in the bead locking areas, e.g. drum shoulders

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Dispersion Chemistry (AREA)
  • Silicon Compounds (AREA)

Abstract

1,184,094. Silica sols. DEUTSCHE GOLDUND SILBER-SCHEIDEANSTALT. 6 March, 1967 [10 March, 1966], No. 10416/67. Heading C1A. In a process for the preparation of stable silica dispersions containing up to 40% by weight of silica, silica derived from quartz and carbon in an electric arc and having BET specific surface area of 150-250 m.<2>/g. and average primary particle size of 5-35 Á is added to aqueous alkali while stirring and cooling to below 28‹ C., the resulting suspension is dispersed with a turbine agitator while cooling to below 28‹ C., a monohydric aliphatic alcohol, a primary or secondary aliphatic amine or an aliphatic ketone is added as stabilizer, and impurities, after settling, are removed. The alcohol, and each aliphatic group in the amine or ketone contains 1 to 4 carbon atoms. Specified stabilizers are methyl, ethyl, propyl and butyl alcohols, methylamine, ethylamine, di-ethylamine and acetone used in a quantity of 1-10% by weight based on the silica content of the dispersion. If the pH of the dispersion is above 10, all silicon carbide impurity readily settles out for removal by decantation or centrifugation.
GB1041667A 1966-03-10 1967-03-06 A Process for the preparation of Dispersions of Pyrogenic Silica Expired GB1184094A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DED0049558 1966-03-10

Publications (1)

Publication Number Publication Date
GB1184094A true GB1184094A (en) 1970-03-11

Family

ID=7051979

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1041667A Expired GB1184094A (en) 1966-03-10 1967-03-06 A Process for the preparation of Dispersions of Pyrogenic Silica

Country Status (3)

Country Link
DE (1) DE1567454A1 (en)
FR (1) FR1513793A (en)
GB (1) GB1184094A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4150101A (en) 1974-03-26 1979-04-17 Deutsche Gold- Und Silber-Scheideanstalt Vormals Roessler Process for the production of silica with an aerogel type structure
US5102676A (en) * 1988-12-22 1992-04-07 Unilever Patent Holdings B.V. Stable suspensions for filtering beer
US20100286311A1 (en) * 2008-03-04 2010-11-11 Evonik Degussa Gmbh Silica and also epoxy resins

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61136909A (en) * 1984-12-04 1986-06-24 Mitsubishi Chem Ind Ltd Aqueous dispersion liquid composition of anhydrous silicon acid

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4150101A (en) 1974-03-26 1979-04-17 Deutsche Gold- Und Silber-Scheideanstalt Vormals Roessler Process for the production of silica with an aerogel type structure
US5102676A (en) * 1988-12-22 1992-04-07 Unilever Patent Holdings B.V. Stable suspensions for filtering beer
US20100286311A1 (en) * 2008-03-04 2010-11-11 Evonik Degussa Gmbh Silica and also epoxy resins
US8480846B2 (en) * 2008-03-04 2013-07-09 Evonik Degussa Gmbh Silica and also epoxy resins

Also Published As

Publication number Publication date
DE1567454A1 (en) 1970-08-06
FR1513793A (en) 1968-02-16

Similar Documents

Publication Publication Date Title
US2978298A (en) Process for producing hydrophobic aerogels
EP0683809B1 (en) Surface modified silica
US3346507A (en) Process of preparing an organo-silica aerogel
GB1212560A (en) Improvements in or relating to the preparation of silica aerogels
ES353303A1 (en) Stabilization of beer
GB1184094A (en) A Process for the preparation of Dispersions of Pyrogenic Silica
GB1141213A (en) Process for impregnating red phosphorus with a hydrophobic agent
US3855145A (en) Preparation of concentrated silica organosols
GB1065733A (en) Fine aluminium hydroxides
US1438588A (en) Treatment of clay
US2945817A (en) Silica-silicone aerogels and their preparation
GB900790A (en) Improvements in or relating to crystalline synthetic cryolite
US5135575A (en) Method of forming stable dispersions of particulate matter
GB1133210A (en) Pest control agent
US2391253A (en) Preparation of sols
US4197252A (en) Process for the preparation of orthosilicic acid tetraalkoxyalkyl esters
US2905567A (en) Silica composition and production thereof
GB977933A (en) Thick web dendritic growth
GB1199953A (en) Silicon Carbide
US2847471A (en) Method for purifying tetracycline
US3342748A (en) Stable alkaline colloidal silica sols of low viscosity and processes for preparing same
US2391255A (en) Preparation of sols
ES259597A1 (en) Process for the manufacture of quinacridone pigments in a finely divided form
GB1024924A (en) Process for the removal of impurities from wet process phosphoric acid
US2356773A (en) Preparation of sols

Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees