Process for the production of very pure...

Details Process for the production of very pure... Process for the production of very pure...

2005-02-01

2009-02-24

Cooney, John (Department: 1796)

Organic compounds -- part of the class 532-570 series

Organic compounds

Isocyanate esters

C560S347000, C560S358000, C560S359000, C528S080000, C528S085000, C203S071000

Reexamination Certificate

active

07495124

ABSTRACT:
The present invention relates to a process for the production of MDI fractions containing 2,4′-MDI, and in which the 2,2′-MDI component from the MDA production is largely removed from the isomer mixture. Highly reactive monomeric MDI products can be produced in this way. These MDI products are characterised in their processing by significantly reduced emissions of MDI monomers.

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