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:
May. 29, 2007
Filed:
Mar. 02, 2004
Mark O. Scates, Houston, TX (US);
David A. Trueba, Webster, TX (US);
Raymond J. Zinobile, Houston, TX (US);
Mark O. Scates, Houston, TX (US);
David A. Trueba, Webster, TX (US);
Raymond J. Zinobile, Houston, TX (US);
Celanese International Corporation, Dallas, TX (US);
Abstract
An improvement of the methanol carbonylation process for manufacturing acetic acid is disclosed. Specifically disclosed is a method for reducing the formation of alkyl iodides and Ccarboxylic acids by removing permanganate reducing compounds ('PRC's') from the light phase of the condensed light ends overhead stream, including (a) distilling the light phase to yield a PRC enriched overhead stream; and (b) extracting the third overhead stream with water in at least two consecutive stages and separating therefrom one or more aqueous streams containing PRC's.