METHOD OF SEPARATING AND EXTRACTING DIALKYL TIN DIALKOXIDE Russian patent published in 2010 - IPC C07F7/22 C07C68/00 B01J31/00 

FIELD: chemistry.

SUBSTANCE: invention relates to separation and extraction of tialkyl tin dialkoxide from a catalyst composition of alkyl tin alkoxide used as a catalyst during synthesis of ether or carbonate. The invention describes a method of separating and extracting dialkyl tin dialkoxide from an alkyl tin alkoxide catalyst composition which cannot be separated through distillation for use in production a carbonate which contains a high-boiling deactivated component having boiling point higher than 250°C at normal pressure, and an active component having two tin-carbon bonds on each tin atom in the alkyl tin alkoxide, involving the following steps: (1) reaction of the alkyl tin alkoxide catalyst composition with an alcohol and/or carbonate to obtain a reaction solution which contains a product formed from the active component; and (2) distillation of the reaction solution obtained at step (1) so as to separate and extract dialkyl tin dialkoxide from the product formed from the active compound.

EFFECT: efficient separation and extraction from an alkyl tin alkoxide catalyst composition which cannot be separated through distillation, where said composition contains a high-boiling deactivated component and a dialkyl tin dialkoxide active component.

17 cl, 24 ex, 2 tbl, 3 dwg