Modification of zeolites by treatment with chlorine gas
CA 1190206 A · Owner: Union Carbide Corporation · Inventors: Lok, Brent M.; Messina, Celeste A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract, Described herein is a process for enhancing the hydrophobicity of crystalline zeolites and also crystalline zeolitic aluminosilicate compositions which have enhanced hydrophobic character and modified catalytic properties. The crystalline zeolitic aluminosilicate compositions are contacted with chlorine gas at 200°C to about 1000°C to dealuminize and/or decationize their structrue and thereafter are purged with nitrogen gas to remove any entrapped chlorine gas. The crystalline zeolitic aluminosilicate composition can further undergo washing with water to remove any entrapped metal chloride species. The crystalline zeolitic aluminosilicate compositions of this invention are useful …
Read the whole patent
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 July 9, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 9, 2002.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
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.