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:
Jun. 02, 2009
Filed:
Jun. 29, 2005
Robert Edgar Colborn, Niskayuna, NY (US);
David Bruce Hall, Ballston Lake, NY (US);
Peter Alois Koch, Frankfurt, DE;
Bernd Volker Demuth, Offenbach, DE;
Thomas Wessel, Niederdorfelden, DE;
Karlernst Mack, Wiesbaden, DE;
Prashant Anil Tatake, Mumbai, IN;
Utpal Mahendra Vakil, Mumbai, IN;
Shyamal Bhaskar Gondkar, Bangalore, IN;
John Edward Pace, Washington, WV (US);
Kwang Woong Won, San Clemente, CA (US);
Robert Edgar Colborn, Niskayuna, NY (US);
David Bruce Hall, Ballston Lake, NY (US);
Peter Alois Koch, Frankfurt, DE;
Bernd Volker Demuth, Offenbach, DE;
Thomas Wessel, Niederdorfelden, DE;
KarlErnst Mack, Wiesbaden, DE;
Prashant Anil Tatake, Mumbai, IN;
Utpal Mahendra Vakil, Mumbai, IN;
Shyamal Bhaskar Gondkar, Bangalore, IN;
John Edward Pace, Washington, WV (US);
Kwang Woong Won, San Clemente, CA (US);
SABIC Innovative Plastics IP B.V., Bergen op Zoom, NL;
Abstract
A method of preparing a halophthalic acid is disclosed which comprises the steps of contacting in a liquid phase reaction mixture at least one halogen-substituted ortho-xylene with oxygen and acetic acid at a temperature in a range between about 120° C. and about 220° C. in the presence of a catalyst system yielding a product mixture comprising less than 10 percent halogen-substituted ortho-xylene starting material, a halophthalic acid product, and less than about 10,000 ppm halobenzoic acid and less than about 1000 ppm halophthalide by-products based on a total amount of halophthalic acid present in the product mixture. In addition methods for the preparation of halophthalic anhydride, and recovery of high purity acetic acid from an aqueous acetic acid stream comprising HCl, which is generated during the preparation of the halophthalic acid are also disclosed.