Preparation of thionyl chloride and phosphorus oxyhloride from s

Details Preparation of thionyl chloride and phosphorus oxyhloride from s Preparation of thionyl chloride and phosphorus oxyhloride from s

1994-01-28

1996-03-12

Langel, Wayne

Chemistry of inorganic compounds

Phosphorus or compound thereof

Halogen containing

423468, C01B 1745, C01B 2510

Patent

active

054984009

ABSTRACT:
A process to manufacture high purity thionyl chloride and phosphorus oxychloride utilizing a fluctuating flow of sulfur dioxide. Chlorine, sulfur dioxide, and phosphorus trichloride are reacted in a process that limits the amount of sulfuryl chloride and/or phosphorus trichloride remaining in the product stream. Cl.sub.2 and SO.sub.2 are first reacted to form SO.sub.2 Cl.sub.2, which, in turn, is reacted with excess PCl.sub.1 to form the products, POCl.sub.3 and SOCl.sub.2. Any excess PCl.sub.3 is then reacted with additional Cl.sub.2 and SO.sub.2 to form additional product. Alternatively, Cl.sub.2, SO.sub.2, and PCl.sub.13 are reacted directly to form POCl.sub.3 and SOCl.sub.2 without the formation of any SO.sub.2 Cl.sub.2 intermediate by utilizing a continuous stirred loop reactor.

REFERENCES:
patent: 1753754 (1930-04-01), Schudel
patent: 1765688 (1930-06-01), McKee et al.
patent: 1788959 (1931-01-01), Schudel
patent: 3771966 (1973-11-01), Hutson et al.
patent: 4388290 (1983-06-01), Jonas

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