GB607427A - Improvements in and relating to organo-silica sols and gels - Google Patents
Improvements in and relating to organo-silica sols and gelsInfo
- Publication number
- GB607427A GB607427A GB3439/46A GB343946A GB607427A GB 607427 A GB607427 A GB 607427A GB 3439/46 A GB3439/46 A GB 3439/46A GB 343946 A GB343946 A GB 343946A GB 607427 A GB607427 A GB 607427A
- Authority
- GB
- United Kingdom
- Prior art keywords
- siliconate
- sodium
- alkali
- sol
- prepared
- 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
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63C—LAUNCHING, HAULING-OUT, OR DRY-DOCKING OF VESSELS; LIFE-SAVING IN WATER; EQUIPMENT FOR DWELLING OR WORKING UNDER WATER; MEANS FOR SALVAGING OR SEARCHING FOR UNDERWATER OBJECTS
- B63C9/00—Life-saving in water
- B63C9/08—Life-buoys, e.g. rings; Life-belts, jackets, suits, or the like
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J13/00—Colloid chemistry, e.g. the production of colloidal materials or their solutions, not otherwise provided for; Making microcapsules or microballoons
- B01J13/0091—Preparation of aerogels, e.g. xerogels
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Dispersion Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Silicon Compounds (AREA)
Abstract
Organo-silica aerogels are prepared by first making a sol by mixing an alkali silicate and an alkali lower alkyl or aryl siliconate and reacting with an inorganic acid, then adding a water-miscible or anic solvent to precipitate inorganic salt and removing these from the sol, then heating the sol in a closed vessel above the critical pressure and temperature of the solvent and releasing vapour at such a pressure, completing the removal of vapour at sub-atmospheric pressure and cooling the vessel to 150 DEG C. or below, before opening. The alkali siliconates are prepared by dissolving a mono-organo polysiloxane in a solution of sodium hydroxide. The following reactants are specified: silicate-sodium or potassium silicate, water glass, sodium metasilicate pentahydrate; siliconate-sodium methyl or ethyl siliconate, potassium phenyl siliconate; inorganic acid-sulphuric; solvent-alcohol. There may also be present alkali solutions of silicones, e.g. of dimethyl, diethyl or diphenyl silicones, which may be added to the alkali siliconates or prepared in admixture therewith. The aerogels obtained are water-repellent and of very low density and may be used as buoyant fillers for life jackets, for heat insulation, and as catalysts or catalyst carriers. Detailed examples are given of the preparation of aerogels from mixtures of sodium silicates with sodium methyl siliconate, sodium ethyl siliconate, potassium phenyl siliconate, and the hydrolysate of a mixture of methyltrichlorosilane and dimethyldichlorsilane. The Specification as open to inspection under Sect. 91 refers also to the use of sols (obtained as an intermediate in the invention) for bonding or impregnating cloth, paper, fibrous mats and bentonite fibres. This subject-matter does not appear in the Specification as accepted.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US607427XA | 1945-02-10 | 1945-02-10 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB607427A true GB607427A (en) | 1948-08-31 |
Family
ID=22031463
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3439/46A Expired GB607427A (en) | 1945-02-10 | 1946-02-04 | Improvements in and relating to organo-silica sols and gels |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB607427A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105727853A (en) * | 2016-01-29 | 2016-07-06 | 卓达新材料科技集团有限公司 | Ambient pressure drying method of fiber needled felt/silicon-aluminium aerogel composite insulation board |
| WO2019129607A1 (en) | 2017-12-27 | 2019-07-04 | Rhodia Operations | Precipitated silica and process for its manufacture |
| CN110950319A (en) * | 2019-12-24 | 2020-04-03 | 中国建筑材料科学研究总院有限公司 | Method and apparatus for reducing density of carbon aerogel material |
| US10995218B2 (en) * | 2016-07-27 | 2021-05-04 | Wacker Chemie Ag | Method for producing modified precipitated silica and a composition containing the same |
-
1946
- 1946-02-04 GB GB3439/46A patent/GB607427A/en not_active Expired
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105727853A (en) * | 2016-01-29 | 2016-07-06 | 卓达新材料科技集团有限公司 | Ambient pressure drying method of fiber needled felt/silicon-aluminium aerogel composite insulation board |
| US10995218B2 (en) * | 2016-07-27 | 2021-05-04 | Wacker Chemie Ag | Method for producing modified precipitated silica and a composition containing the same |
| WO2019129607A1 (en) | 2017-12-27 | 2019-07-04 | Rhodia Operations | Precipitated silica and process for its manufacture |
| CN111479776A (en) * | 2017-12-27 | 2020-07-31 | 罗地亚经营管理公司 | Precipitated silica and method for producing same |
| US11958980B2 (en) | 2017-12-27 | 2024-04-16 | Rhodia Operations | Precipitated silica and process for its manufacture |
| CN110950319A (en) * | 2019-12-24 | 2020-04-03 | 中国建筑材料科学研究总院有限公司 | Method and apparatus for reducing density of carbon aerogel material |
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