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:
Nov. 29, 2016
Filed:
Oct. 17, 2012
Melle Rinze Nieuwhof, Dieren, NL;
Cornelis Kooijman, Deventer, NL;
Willem Koelewijn, Zwolle, NL;
Hendrik Jan Vos, Apeldoorn, NL;
Lars Magnus Tollin, Skoghall, SE;
Henricus Johannes Marinus Petrus Van Hal, Barneveld, NL;
Melle Rinze Nieuwhof, Dieren, NL;
Cornelis Kooijman, Deventer, NL;
Willem Koelewijn, Zwolle, NL;
Hendrik Jan Vos, Apeldoorn, NL;
Lars Magnus Tollin, Skoghall, SE;
Henricus Johannes Marinus Petrus Van Hal, Barneveld, NL;
Akzo Nobel Chemicals International B.V., Amersfoort, NL;
Abstract
The present invention pertains to a process for the purification of a substantially water-free liquid feed comprising monochloroacetic acid, dichloroacetic acid, optionally acid chlorides, optionally anhydrides, and optionally acetic acid, which comprises the steps of (a) adding water to the liquid feed so that a liquid feed is obtained comprising between 0.01 and 5% by weight of water, based on the total weight of the liquid feed, and (b) subsequently subjecting the liquid feed obtained in step (a) to a catalytic hydrodechlorination step by contacting it with a source of hydrogen to convert the dichloroacetic acid into monochloroacetic acid in the presence of a solid heterogeneous hydrogenation catalyst comprising one or more metals of Group VIII of the Periodic Table of the Elements deposited on a carrier.