Preparation of dimethylamine
CA 1135939 A · Owner: E. I. Du Pont De Nemours And Company · Inventors: Weigert, Frank J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Improved continuous process for disproportionating monomethylamine to dimethylamine and ammonia said process comprising passing monomethylamine over the crystalline aluminosilicate catalyst selected from a) mordenite wherein the primary cation is Na, HNA having at least 2% Na, Mg, Ca, Sr or Ba, b) ferrierite wherein the primary metal cation is Na, K. Mg, Ca, Sr or Ba, c) clinoptilolite and d) phillipsite, at a temperature of 250-475°C and a pressure of 7-7000 kPa, at a feed rate of 0.1-10 g of monomethylamine/g of catalyst per hour, at a monomethylamine conversion of 15-75%.
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 November 23, 1982. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 23, 1999.
- 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.