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:
Dec. 09, 1980
Filed:
Apr. 16, 1979
Max P McDaniel, Bartlesville, OK (US);
Melvin B Welch, Bartlesville, OK (US);
Alonzo G Kitchen, Bartlesville, OK (US);
Phillips Petroleum Company, Bartlesville, OK (US);
Abstract
A catalyst composition of a chromium compound supported on a silica-containing substrate is prepared by contacting the silica-containing substrate with a gaseous carrier containing water vapor at a temperature in the range above about 1100.degree. F. to about 2000.degree. F. for a time sufficient to effect a broadening of molecular weight distribution of polymers produced using the catalyst. In further embodiments, the catalyst prepared by the method described above and a method for preparing polymers of ethylene using the catalyst prepared by the method described above.