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. 29, 2005
Filed:
Dec. 20, 2004
Applicants:
Walter S. Dubner, Wilmington, DE (US);
Wilfred Po-sum Shum, West Chester, PA (US);
Inventors:
Walter S. Dubner, Wilmington, DE (US);
Wilfred Po-sum Shum, West Chester, PA (US);
Assignee:
Lyondell Chemical Technology, L.P., Greenville, DE (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C027/04 ;
U.S. Cl.
CPC ...
Abstract
The catalytic hydrogenation of HBA and/or HMPA is improved by either or both of (1) increasing the temperature in the hydrogenation zone from about 50 to 70° C. at the inlet to above 80° C. at the outlet and (2) raising the pH of the hydrogenation feed to 4.5–6.0 before hydrogenation.