Spherical micro-porous silica gel and a production process thereof
CA 1213262 A · Owner: Toyo Soda Manufacturing Co. Ltd. · Inventors: Arika, Junji; Yamamoto, Kazuaki; Shiota, Eiji
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A novel spherical micro-porous silica gel having a mean diameter of 3 - 20 µm, a bulk density of 0.28 - 0.41 g/cm3 a pore size of 18,000 -, 100,000 and a specific surface area of 1,000 - 1,400 m2/g useful as a packing, material for gas or liquid chromatography or as a support for catalysts used in catalytic reactions, is produced by gelling an aqueous solution containing (a) SiO2 and (b) stearic acid or a mixture of stearic acid and a non-ionic surface active agent of which HLB ranges from 3.5 to 6.0 as an emulsifier which solution is dispersed as aqueous droplets in an oil phase wherein the, primary particle diameter is not larger than 6 nm and the molar ratio of SiO2 to Na2O is not larger …
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted October 28, 1986. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 28, 2003.
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Timeline
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Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.