Process for removing by-products from diurethanes

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

C - Chemistry, Metallurgy

07

C

C07C 271/06 (2006.01) C07C 263/04 (2006.01) C07C 265/14 (2006.01) C07C 269/08 (2006.01)

Patent

CA 2179481

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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