Preparation of dialkali metal hexahydropyrimidine-1, 3-diacetate and dialkalimetal 5-hydroxyhexahydropyrimidine-1, 3-diacetate
CA 1069122 A · Owner: W.R. Grace And Co. · Inventors: Gaudette, Roger R.; Ohlson, John L.; Scanlon, Patricia M.
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PREPARATION OF DIALKALI METAL, HEXAHYDROPYRIMIDINE-1,3-DIACETATE AND DIALKALIMETAL 5-HYDROXYHEXAHYDROPYRIMIDINE-1,3-DIACETATE Abstract of the Disclosure, or, (in which M is an alkali metal ion) is prepared by forming an alkaline aqueous solution of an alkali metal hydroxide and hexahydropyrimidine or 5-hydroxyhexahydropyrimidine and feeding an alkali metal cyanide and aqueous formaldehyde into the alkaline aqueous solution while agitating the resulting reacting mixture and while maintaining its temperature within a range effective for vaporizing byproduct ammonia therefrom, the alkali metal cyanide and the formaldehyde being fed at rates effective for maintaining an excess of unreacted …
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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 January 1, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 1, 1997.
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