GB1362250A - High purity fine sized silica - Google Patents

High purity fine sized silica

Info

Publication number
GB1362250A
GB1362250A GB2971371A GB2971371A GB1362250A GB 1362250 A GB1362250 A GB 1362250A GB 2971371 A GB2971371 A GB 2971371A GB 2971371 A GB2971371 A GB 2971371A GB 1362250 A GB1362250 A GB 1362250A
Authority
GB
United Kingdom
Prior art keywords
sol
silica
ammonia
mixture
drying
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
GB2971371A
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.)
WR Grace and Co Conn
WR Grace and Co
Original Assignee
WR Grace and Co Conn
WR Grace and Co
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 WR Grace and Co Conn, WR Grace and Co filed Critical WR Grace and Co Conn
Publication of GB1362250A publication Critical patent/GB1362250A/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
    • C01B33/16—Preparation of silica xerogels
    • C01B33/163—Preparation of silica xerogels by hydrolysis of organosilicon compounds, e.g. ethyl orthosilicate
    • 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

Landscapes

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

Abstract

1362250 Silica, silica sol. W R GRACE & CO 24 June 1971 [26 June 1970] 29713/71 Heading C1A A high-purity silica is produced by (i) forming a mixture of an alcoholic solution of ammonia or an ammonia releasing agent, (ii) thereby (when water is present in the mixture) or subsequently initiating hydrolysis of the mixture to form an alcoholic sol. and (iii) drying and recovering a fine size silica product from the alcoholic sol. The ammonia releasing agent may be ammonia (usually in the form of ammonium hydroxide-see Examples 1 and 2), formamide, acetamide, thiourea, hexamethylene tetramine and urea (Examples 3 and 4). The hydrolysis may be initiated by addition of water. The silicon orthoester may be an alkyl silicon orthoester having from 1-5 carbon atoms, e.g. ethyl orthosilicate. The alcohol may be ethanol (see examples), methanol, propanol, butanol or pentanol. Drying may be by freeze drying, fluid energy milling or distilling. The alcohol sol. may be converted into a aqueous sol. by dialysis.
GB2971371A 1970-06-26 1971-06-24 High purity fine sized silica Expired GB1362250A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US5034470A 1970-06-26 1970-06-26

Publications (1)

Publication Number Publication Date
GB1362250A true GB1362250A (en) 1974-07-30

Family

ID=21964725

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2971371A Expired GB1362250A (en) 1970-06-26 1971-06-24 High purity fine sized silica

Country Status (2)

Country Link
DE (1) DE2131941A1 (en)
GB (1) GB1362250A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012069570A1 (en) * 2010-11-26 2012-05-31 Commissariat à l'énergie atomique et aux énergies alternatives Preparation of stable metal oxide sols, of use in particular for the manufacture of thin films having optical and abrasion-resistant properties

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3786933T2 (en) * 1986-02-12 1994-01-20 Catalysta & Chemicals Ind Co Process for the production of mono-dispersed particles.
CN105948060B (en) * 2016-04-28 2017-12-08 江苏泽龙石英有限公司 The acid stripping method of acid-washed quartz sand
CN114082943B (en) * 2021-11-23 2024-01-05 成都佳驰电子科技股份有限公司 Method for coating carbonyl iron powder with silicon dioxide in ethanol-free system

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012069570A1 (en) * 2010-11-26 2012-05-31 Commissariat à l'énergie atomique et aux énergies alternatives Preparation of stable metal oxide sols, of use in particular for the manufacture of thin films having optical and abrasion-resistant properties
FR2967992A1 (en) * 2010-11-26 2012-06-01 Commissariat Energie Atomique SOIL PREPARATION OF STABLE METAL OXIDES USEFUL IN THE MANUFACTURE OF THIN FILMS WITH OPTICAL AND ABRASION RESISTANT PROPERTIES
US9156995B2 (en) 2010-11-26 2015-10-13 Commissariat à l'énergie atomique et aux énergies alternatives Preparation of stable metal oxide sols, notably for making thin abrasion-resistant films with optical properties

Also Published As

Publication number Publication date
DE2131941A1 (en) 1971-12-30

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee