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:
Oct. 26, 1999
Filed:
Jul. 09, 1998
David G Roberts, Gibsonia, PA (US);
Peter C Foller, Murrysville, PA (US);
Robert H Tang, Murrysville, PA (US);
Yingchao Zhang, Murrysville, PA (US);
PPG Industries Ohio, Inc., Cleveland, OH (US);
Abstract
Describes a method of electrochemically converting .alpha.-halohydrin, e.g., 1-chloro-2-hydroxypropane and 1,3-dichloro-2-hydroxypropane, to epoxide, e.g., propylene oxide and epichlorohydrin. An aqueous solution of .alpha.-halohydrin is charged to the catholyte compartment of an electrolytic cell, which contains a cathode, hydrogen gas is charged to the anode compartment of the cell, which contains an anode assembly comprising a hydrogen consuming gas diffusion anode fixedly held between a current collecting electrode and an anion exchange membrane. The catholyte and anode compartments of the cell are separated by the anion exchange membrane. An aqueous solution containing epoxide is removed from the catholyte compartment.