C - Chemistry – Metallurgy – 07 – C
Patent
C - Chemistry, Metallurgy
07
C
C07C 263/20 (2006.01) C07C 265/14 (2006.01)
Patent
CA 2737397
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.
La présente invention concerne un procédé de production simultanée et continue de deux mélanges différents contenant principalement du 4,4'-MDI et du 2,4'-MDI dans un procédé en une étape de cristallisation dune suspension en milieu fondu, un courant d'alimentation en mélange de diisocyanates [MIx] étant utilisé pour produire simultanément deux courants de mélange de diisocyanates [MIy et MIz] dans lesquels x = 80 à 92, y = 97 à 99 et z = 60 à 80 de préférence x = 82 à 88, y = 97,2 à 98,5 et z = 63 à 70, x, y et z représentant les pourcentages en poids de lisomère 4,4'-MDI contenu dans le mélange disomères diisocyanates.
Carr Robert Henry
Koole Johannes Lodewijk
Zijl Adolf Daan
Huntsman International Llc
Smart & Biggar
LandOfFree
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