Process for the production of diisocyanatodiphenyl methane isome

Details Process for the production of diisocyanatodiphenyl methane isome Process for the production of diisocyanatodiphenyl methane isome

1978-05-22

1980-02-19

Bascomb, Jr., Wilbur L.

Distillation: processes, separatory

Plural distillations performed on same material

Distillation of initial distillate

203 77, 203 82, 260453SP, B01D 310, C07C11904

Patent

active

041893549

ABSTRACT:
The instant invention is directed to a process for the production of diisocyanatodiphenyl methane isomers having an adjusted content of chlorine compounds comprising:

REFERENCES:
patent: 3658656 (1972-04-01), Adica et al.
patent: 3857871 (1974-12-01), Hatfield et al.
patent: 3897314 (1975-07-01), Liebsch et al.
patent: 3912600 (1975-10-01), Hatfield et al.

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