Process for production of sugar ketals
CA 1191844 A · Owner: Takeda Chemical Industries, Ltd. · Inventors: Aono, Tetsuya; Matsumura, Koichi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process is disclosed for production of a sugar ketal, which comprises reacting a sugar with a ketone in the presence of (A) (1) copper, or an oxide hydroxide or, salt thereof and (2) hydrogen chloride or hydrogen bromide or (B) cupric chloride or cupric bromide said catalyst, system being very effective in a small amount. The formation of unfavorable by-products can be reduced to a trace amount. The process offers the objective ketal in improved yields, and an industrially advantageous process.
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 13, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 13, 2002.
- 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.