US 10,174,060 B2 · Process for purifying monooctylin trichloride

Abstract

The present invention provides a process for producing monooctyltin trichloride comprising very low levels of dioctyltin and trioctyltin compounds, said process comprising the following steps: (1) Contacting an organotin chloride mixture comprising monooctyltin chloride with an aqueous phase containing halide ions, said step optionally being carried out in the presence of organic solvent; (2) separating the resulting aqueous phase which is rich in monooctyltin chloride from the organic phase containing most of the dioctyltin and trioctyltin compounds; (3) optionally purifying said aqueous phase comprising monooctyltin trichloride from undesired side products by washing said aqueous phase with an organic solvent; and (4) recovering monooctyltin trichloride from said aqueous phase comprising monooctyltin trichloride.

Claims17

Dependent claims

A process for producing monooctyltin trichloride comprising very low levels of dioctyltin and trioctyltin compounds, the process comprising:

i) contacting an organotin chloride mixture comprising monooctyltin chloride, which organotin chloride mixture also comprises dioctyltin compounds and/or trioctyltin compounds, with an aqueous phase containing halide salts, optionally in the presence of organic solvent, resulting in an aqueous phase comprising monooctyltin chloride, and an organic phase containing most of the dioctyltin trioctyltin and/or trioctyltin compounds;
ii) separating the aqueous phase from the organic phase;
iii) purifying the aqueous phase from undesired side products by washing the aqueous phase with an organic solvent;
and
iv) recovering monooctyltin trichloride from the aqueous phase.

2 more elements

Dependencies are inferred from the claim text.

Process for purifying monooctylin trichloride

Life of this patent

Process for purifying monooctylin trichloride

Life of this patent

Abstract

Claims17