Process for the preparation of internal olefin sulphonates
CA 1338239 C · Owner: Van Ginkel, Roelof · Inventors: Van Ginkel, Roelof; Stapersma, Johan
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to a process for the preparation of internal olefin sulphonates which comprises reacting in a film reactor an internal olefin having from 8 to 26 carbon atoms with a sulphonating agent, in a mol ratio of sulphonating agent to internal olefin of 1:1 to 1.25:1 while cooling the reactor with a cooling means having a temperature not exceeding 35 C, and allowing to neutralize and hydrolyze the reaction product of the sulphonating step and further to internal olefin sulphonates which have a high content of beta-hydroxy sulphonates compared with the usually described products.
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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 April 9, 1996. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 9, 2013.
- 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.