Process for producing tri-N-butylphosphorotrithioite
AssigneeMiles Inc.
InventorsAra H. Zakaryan, Peter E. Newallis, Mark A. Tice
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Abstract
Tri-n-butylphosphorothioite is produced on a continuous or semi-continuous by simultaneously adding phosphorus trichloride and butylmercaptan to a reaction vessel at a rate such that an excess of butylmercaptan is present and allowing the resultant mixture to react at a temperature of from about 120.degree. C. to about 150.degree. C. One or more reactors may be employed. This process is particularly advantageous for safety reasons and produces high quality phosphite which may be oxidized without purification to produce S,S,S-tri-n-butylphosphorotrithioate.
Claims10
A process for the production of tri-n-butyl-phosphorotrithioite on a continuous or semi-continuous basis comprising
- a) simultaneously introducing phosphorous trichloride and butylmercaptan into a reaction vessel which is maintained at a temperature of from about 60.degree. to about 80.degree. C.,
- b) heating the mixture of a) to form tri-n-butylphosphotrithioite in a relatively substantial amount and,
- c) recovering tri-n-butylphosphorotrithioite.
Dependencies are inferred from the claim text.