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US 5,118,487 AGranted
Process for producing chlorosulfonyl isocyanate
AssigneeKuraray Co., Ltd.
InventorsAkira Nakamura, Matsuo Ono, Toshiei Ataka, Hideo Shirakawa, Shizuo Noguchi, Hirozo Segawa
Life of this patent
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Abstract
Provided is a process for producing chlorosulfonyl isocyanate by reacting sulfur trioxide with cyanogen chloride, which comprises feeding sulfur trioxide and cyanogen chloride simultaneously to the reaction zone and maintaining the temperature of the reacting zone at 10.degree. to 50.degree. C. This is a commercially very simple process and can produce chlorosulfonyl isocyanate with high purity in high yield.
Claims6
In a batch process for producing chlorosulfonyl isocyanate by reacting sulfur trioxide with cyanogen chloride, the improvement which comprises:
- feeding sulfur trioxide and cyanogen chloride simultaneously to the reaction zone and maintaining the temperature of the reacting zone at 10.degree. to 50.degree. C.
Dependencies are inferred from the claim text.