Process for preparing guanidine
CA 1084527 A · Owner: Mitsui Toatsu Chemicals, Inc. · Inventors: Inoue, Shigeru; Ono, Hiroshi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention is a process for obtaining guanidine by separating guanidine from a process stream obtained in a urea synthesis process in which ammonia and carbon dioxide are reacted at a high temperature and a high pressure to form urea, with concomitant formation of guanidine. The process stream may be a urea synthesis effluent from a urea synthesis zone a solution, obtained by separating unreacted materials from the effluent a concentrate, of the solution or a mother liquor derived from a urea crystallization zone.
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 August 26, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 26, 1997.
- 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.