Process for removing by-products from diurethanes

Details Process for removing by-products from diurethanes Process for removing by-products from diurethanes

1996-06-20

1997-07-08

Barts, Samuel

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

Organic compounds

Carboxylic acid esters

560115, 560158, 560345, C07C26300

Patent

active

056463286

ABSTRACT:
Low-boiling by-products are removed from diurethanes prepared by a phosgene-free process by carrier vapor distillation using alcohol vapor, preferably the vapor of the basic alcohol found in the diurethane, as the carrier vapor. The diurethanes freed of low-boiling by-products in this manner may be thermally decomposed to produce diisocyanates.

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