The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 18, 2012
Filed:
May. 02, 2008
Peter Mckenna, Romsey, GB;
Mark Smallridge, Hythe, GB;
Melissa Matthews, Southampton, GB;
Simon Roberts, Romsey, GB;
Peter McKenna, Romsey, GB;
Mark Smallridge, Hythe, GB;
Melissa Matthews, Southampton, GB;
Simon Roberts, Romsey, GB;
Cognis IP Management GmbH, Duesseldorf, DE;
Abstract
The invention relates to a process for the production of diols with a special structure which are characterized by formula (I). These diols are substances which, besides two OH groups, contain a C═C double bond so that they are suitable as monomers for the production of polymers. The process comprises hydrolyzing a corresponding cyclic precursor in aqueous medium in the presence of an acid dissolved in that medium, the hydrolysis being accompanied by the elimination of a carbonyl compound, and subsequently neutralizing the acid present in the reaction mixture with a base, the base having a pKvalue above 0.18 and preferably above 3.0 and being present in heterogeneous form.