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. 23, 2002
Filed:
Nov. 21, 2000
Dennis A. Hucul, Midland, MI (US);
The Dow Chemical Company, Midland, MI (US);
Abstract
The present invention is directed to a hydrogenation catalyst and a process for hydrogenating an aromatic polymer having a number average molecular weight (Mn) of from 40,000 to less than 120,000 comprising contacting the aromatic polymer with a hydrogenating agent in the presence of a silica supported metal hydrogenation catalyst, characterized in that the silica has a pore size distribution such that at least 95 percent of the pore volume is defined by pores having diameter from 300 to 1000 angstroms, less than 4 percent of the pore volume is defined by pores having a diameter of 200 angstroms or less and at least 80 percent aromatic hydrogenation is achieved.