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:
Jul. 23, 2002
Filed:
Oct. 28, 1996
Bohumil V. Kral, Victoria, AU;
ExxonMobil Oil Corporation, Fairfax, VA (US);
Abstract
A process is provided for producing an essentially linear copolymer of ethylene and a minor amount of a 1-olefin containing more than 2 carbon atoms comprising contacting said ethylene and 1-olefin with a Ziegler catalyst in a polymerization reaction zone at elevated temperature and pressure, contacting the polymerization reaction mixture containing polymer and unreacted monomers with a fresh supply of ethylene in a high pressure separation zone (HPS) operating at a lower pressure than the reaction zone such that the contents of the separation zone separates into a dense phase containing a major proportion of polymer, and a light phase containing a major proportion of unreacted monomers, and separately withdrawing the two phases from the separation zone. The polymer containing dense phase is then subsequently treated to obtain a purified polymer product, and at least a portion of the unreacted monomers in the light phase is generally re-used in the reaction, with or without some intermediate treatment or purification.