Process for the preparation of storage-stable alkylene glycol monoalkyl ethers
CA 1188712 A · Owner: Basf Aktiengesellschaft · Inventors: Pachaly, Heinz; Bosche, Horst G.; Nohe, Heinz
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The subject invention relates to the preparation of storage-stable alkylene glycol monoalkyl ethers having the general formula, R-(O-A-)nOH, in which A represents an ethylene or propylene group R, denotes a C1-C4-alkyl group, and n has a value of 1 to 4. They are prepared by carrying out the fractional distillation of a mixture which is produced by the alkali catalyzed reaction of ethylene oxide or propylene oxide with an alcohol in the presence of 0.1 to 20 ppm of ammonia based on the amount of the mixture.
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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 11, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 11, 2002.
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Timeline
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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.