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. 15, 2014
Filed:
Oct. 01, 2009
Johannes Lodewijk Koole, Kessel-Lo, BE;
Adolf Daan Zijl, Tervuren, BE;
Robert Henry Carr, Bertem, BE;
Johannes Lodewijk Koole, Kessel-Lo, BE;
Adolf Daan Zijl, Tervuren, BE;
Robert Henry Carr, Bertem, BE;
Huntsman International LLC, The Woodlands, TX (US);
Abstract
Process for the simultaneous and continuous production of two different mixtures of predominantly 4,4'-MDI and 2,4′-MDI in a single-step suspension melt crystallisation process whereby a mixed diisocyanate feed stream [MIx] is used to produce simultaneously two mixed diisocyanate streams [MIy] and [MIz] wherein x=80 to 92, y=97 to 99 and z=60 to 80 preferably x=82 to 88, y=97.2 to 98.5 and z=63 to 70 where x, y and z are percentages by weight of the 4,4′-MDI isomer contained in the diisocyanate isomer mixture.