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:
Mar. 04, 2014
Filed:
Dec. 21, 2011
Stephan Brietzke, Altendiez, DE;
Peter Groer, Babenhausen, DE;
Christoph Mollenkopf, Frankfurt am Main, DE;
Michael J. Bayer, Eschborn, DE;
Stephan Brietzke, Altendiez, DE;
Peter Groer, Babenhausen, DE;
Christoph Mollenkopf, Frankfurt am Main, DE;
Michael J. Bayer, Eschborn, DE;
Celanese International Corporation, Dallas, TX (US);
Abstract
In one embodiment, the invention is to a process for purifying a by-product stream. The process comprises the step of providing a by-product stream comprising an ammonium salt, dimerized amide, and optionally water. The process further comprises the step of precipitating at least a portion of the dimerized amide in the by-product stream to form solid dimerized amide. The process further comprises the step of separating the solid dimerized amide from the by-product stream to form a treated by-product stream comprising less than 1 wt. % solid dimerized amide.