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. 12, 2016
Filed:
Jul. 09, 2009
Hanns-ingolf Paul, Leverkusen, DE;
Rolf Feller, Mettmann, DE;
John Lovegrove, Sarnia, CA;
Adam Gronowski, Sarnia, CA;
Andreas Jupke, Leverkusen, DE;
Martin Hecker, Köln, DE;
Jörg Kirchhoff, Köln, DE;
Rainer Bellinghausen, Odenthal, DE;
Hanns-Ingolf Paul, Leverkusen, DE;
Rolf Feller, Mettmann, DE;
John Lovegrove, Sarnia, CA;
Adam Gronowski, Sarnia, CA;
Andreas Jupke, Leverkusen, DE;
Martin Hecker, Köln, DE;
Jörg Kirchhoff, Köln, DE;
Rainer Bellinghausen, Odenthal, DE;
LANXESS International S.A., Granges-Paccot, CH;
Abstract
An integrated process for the solution polymerization and subsequent halogenation of butyl rubber in a common medium is disclosed. The process comprises providing a solution polymerization reactor containing a C6 medium mixed with a monomer mixture comprising at least an isoolefin monomer and a multiolefin monomer in a mass ratio of monomer mixture to medium of from 61:39 to 80:20. Once polymerized, residual unreacted monomer mixture is separated from the rubber solution using a distillation process. The residual monomers may then be purified and recycled back into the reactor. The separated rubber solution is then halogenated. The process obviates the need for separating the rubber from the medium following polymerization, then re-dissolving it in another solvent for halogenation, thereby saving energy cost. The process optionally employs heat exchangers for the reactor feed streams to further reduce energy consumption.