Silver catalyst
CA 1292975 C · Owner: Klazinga, Aan Hendrik · Inventors: Klazinga, Aan Hendrik; Boxhoorn, Gosse
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to an improved silver catalyst suitable, for use in the oxidation of ethylene to ethylene oxide characterized by, a) a calcined, alkalimetal-enriched alumina carrier and b) from 1 to 25 per cent by weight of metallic silver based on, the weight of the total catalyst c) an alkali metal of the group consisting of potassium rubidium, and cesium, in the form of their oxide or hydroxide as a promoter and, d) a fluoride-anion, the latter two under c) and d) each being in an amount between-10 and 1000 parts by weight per million parts by weight of the total catalyst.
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 December 10, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 10, 2008.
- 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.