Preparation of nonionic surfactants by oxyalkylation with a magnesium catalyst
CA 1314567 C · Owner: Nieh, Edward Chung Yit · Inventors: Nieh, Edward Chung Yit
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A MAGNESIUM CATALYST ( D#80,822-F), ABSTRACT OF THE DISCLOSURE Nonionic surfactants containing a narrow molecular weight distribution is obtained by the use of a magnesiumcontaining catalyst which comprises reacting a reactive hydrogen compound selected from the group consisting of monohydric alcohols having from about 6 to 30 carbon atoms with an alkylene oxide having from 2-4 carbon atoms at a temperature at which the reaction proceeds in the presence of at least a catalytic amount of a particular magnesium catalyst containing phosphorus.
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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 March 16, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 16, 2010.
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Timeline
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Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.