Separation method and method for producing isocyanate

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United States of America Patent

PATENT NO 9884810
SERIAL NO

13824050

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Abstract

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Disclosed is a method for separating, with a multi-stage distillation column, a mixture containing an active hydrogen-containing compound (A) and a compound (B) that reversibly reacts with the active hydrogen containing compound (A), the method comprising distillation-separating the active hydrogen-containing compound (A) and the compound (B) with the multi-stage distillation column in the presence of an intermediate-boiling-point inactive compound (C) that has a normal boiling point between a normal boiling point of the active hydrogen-containing compound (A) and a normal boiling point of the compound (B) and is chemically inactive for both of the (A) and the compound (B).

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Patent Owner(s)

Patent OwnerAddress
ASAHI KASEI CHEMICALS CORPORATION1-105 KANDA JINBOCHO CHIYODA-KU TOKYO 101-8101

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Miyake, Nobuhisa Tokyo, JP 45 170
Shinohata, Masaaki Tokyo, JP 30 70

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