公开(公告)号：US3459779A

公开(公告)日：1969-08-05

申请号：US3459779D

申请日：1967-06-07

Applicant: STUDIENGESELLSCHAFT KOHLE MBH

Inventor： NEUMANN WILHELM PAUL

IPC: C07F7/22

CPC classification number: C07F7/2216

Abstract: Alkyl tin trihalides are prepared by the reaction between dialkyl tin dihalides or tetra-alkyl tin and tin tetrahalides in the presence of phosphorus-halogen compounds, alone or in admixture with phosphorus oxides, or a hydrogen halide. Specific catalysts are phosphorus oxychloride, alone or in admixture with phosphorus pentoxide, and hydrochloric acid. The reaction is carried out at the boiling point of the mixture, advantageously under pressure and optionally in the presence of an inert diluent. The process of the invention may be modified in that tin tetrahalide and tetra-alkyl tin are reacted in known manner to form alkyl tin trihalides, which may be separated, and other alkyl tin halides, and the reaction completed by adding further tin tetrahalide and the catalyst of the invention.