Production of nitroguanidine from guanidine nitrate through the action of aqueous sulfuric acid
CA 1105489 A · Owner: Industrie Chemie Thoma Gmbh & Co. Beteiligungs-Kg · Inventors: Thoma, Matthias
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The disclosure describes a process for the continuous production of nitroguanidine from quanidine nitrate by the action of aqueous sulfuric acid and possibly nitric acid reusing the concentrated sulfuric acid recovered from the previous step whereby the conversion is carried out using 2.5 to 3.5 moles per mole of guanidine nitrate. The dehydratation is carried out using a 82-85% sulfuric acid at a temperature of 40-80°C preferably 40-60°C in a period of 1 to 3 hours and subsequently the sulfuric acid is diluted to 25-35% by adding water or washacid of 0-5°C from a previous operation and the diluted 25-35% sulfuric acid recovered after separation of the precipitated nitroguanidine is …
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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 July 21, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 21, 1998.
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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.