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:
Mar. 07, 2017
Filed:
Dec. 06, 2012
Saudi Basic Industries Corporation, Riyadh, SA;
Aurora Alexandra Batinas-Geurts, Sittard, NL;
Nicolaas Hendrika Friederichs, Brunssum, NL;
Tom Schoffelen, Hulsberg, NL;
Erik Zuidema, 's-Hertogenbosch, NL;
Priya Garg, Vaals, NL;
SAUDI BASIC INDUSTRIES CORPORATION, Riyadh, SA;
Abstract
The invention relates to a process for the production of bimodal polyethylene in a two-step polymerization process in the presence of a catalyst system comprising: (I) the solid reaction product obtained by reacting of: a) a hydrocarbon solution containing 1) an organic oxygen containing magnesium compound or a halogen containing magnesium compound and 2) an organic oxygen containing titanium compound and b) an aluminum halogenide having the formula AIRXin which R is a hydrocarbon radical containing 1-10 carbon atoms, X is halogen and 0<n<3 (II) an aluminum compound having the formula AIRin which R is a hydrocarbon radical containing 1-10 carbon atom and (III) an electron donor selected from the group of 1,2-dialkoxyalkanes and 1,2-dialkoxyalkenes wherein in the first step a low molecular weight polyethylene is produced which has a MFIis between 1 and 200 dg/min, and in the second step a high molecular weight ethylene copolymer is produced in which the MFIof the total product is between 0.1 and 5 dg/min, and the weight fraction of the material produced in the first step is between 40 wt % and 60 wt % of the total product.