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:
Apr. 07, 1981
Filed:
Oct. 17, 1980
Applicant:
Inventors:
David T Thompson, Whitchurch Hill, GB;
Alfred J Bird, Hounslow, GB;
Edward J Pearson, Caversham Park Village, GB;
Assignee:
Johnson, Matthey & Co., Limited, London, GB;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C / ;
U.S. Cl.
CPC ...
562487 ;
Abstract
This invention relates to catalysis for example, the catalytic hydrogenation of impurities in terephthalic acid to yield terephthalic acid of sufficient purity for use in the production of polyester fibres. In more detail, the invention comprises the step of treating a solution of terephthalic acid with hydrogen gas in the presence of a catalyst comprising two or more of the metals platinum, palladium, rhodium, ruthenium, osmium and irridium.