Patent ID: 8633330
Filing Date: 2014-01-21
Classification: C07F

Abstract:
1. A process for producing monoalkyltin trihalide comprising: a. contacting dialkyltin dihalide with an alkylation agent and, optionally, tin tetrahalide, to form a tetraalkyltin mixture comprising tetraalkyltin, trialkyltin halide, and dialkyltin dihalide; b. reacting the tetraalkyltin mixture with tin tetrahalide to form a monoalkyltin trihalide mixture comprising monoalkyltin trihalide, dialkyltin dihalide and optionally trialkyltin halide; c. processing the monoalkyltin trihalide mixture to separately recover the monoalkyltin trihalide and a dialkyltin dihalide stream comprising the dialkyltin dihalide and optionally trialkyltin halide; and d. recycling at least a portion of the dialkyltin dihalide stream recovered in step (c) to the contacting step (a).