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. 03, 2009
Filed:
Mar. 27, 2008
R. Jay Warner, Houston, TX (US);
Melchior A. Meilchen, Houston, TX (US);
Michael O. Streb, Hünfelden/Ohren, DE;
Nathan K. Powell, Waxahachie, TX (US);
Rolf Soellner, Hofheim, DE;
R. Jay Warner, Houston, TX (US);
Melchior A. Meilchen, Houston, TX (US);
Michael O. Streb, Hünfelden/Ohren, DE;
Nathan K. Powell, Waxahachie, TX (US);
Rolf Soellner, Hofheim, DE;
Celanese International Corporation, Dallas, TX (US);
Abstract
A method of purifying acetic acid containing terpene and terpenoid impurities, includes: (a) supplying acetic acid containing terpene or terpenoid impurities and water to a distillation column; (b) azeotropically removing terpene or terpenoid impurities from the mixture of acetic acid and water supplied to the column as distillate; and (c) withdrawing a product stream from the column comprising acetic acid purified of terpene or terpenoid impurities. The method is particularly effective for purifying acetic acid recovered from a wood purification process.