Process for the preparation of liquid 2-hydroxy- methylthiobutyric acid
CA 1269995 C · Owner: Wolf, Lawrence Russell · Inventors: Ruest, Dennis Arthur; Takano, Masaharu; Wolf, Lawrence Russell
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of the Disclosure, A process for the preparation of 2-hydroxy-4methylthiobutyric acid is disclosed. 2-Hydroxy-4methylthiobutyronitrile is hydrolyzed with mineral acid to produce an aqueous hydrolyzate containing 2-hydroxy- 4-methylthiobutyric acid and substantially free of unreacted 2-hydroxy-4-methylthiobutyronitrile and 2hydroxy-4-methylthiobutyramide. 2-Hydroxy-4methylthiobutyric acid is recovered from the hydrolyzate by extraction. Extraction may be carried out without prior separation from the hydrolyzate solution of any substantial fraction of solids present therein and 2-, hydroxy-4-methylthiobutyric acid may be recovered from the extract by steam distillation. The …
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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 June 5, 1990. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 5, 2007.
- 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.