Separation of chlorosilanes

Details Separation of chlorosilanes Separation of chlorosilanes

C - Chemistry, Metallurgy

07

F

202/67

C07F 7/20 (2006.01)

Patent

CA 1182422

SEPARATION OF CHLOROSILANES ABSTRACT A method for separating close-boiling chloro- silanes by the procedures of extractive distillation is characterized by using sulfolane as the extractive solvent. An example of close-boiling chlorosilanes which can be separated by this method include dimethyldichloro- silane and methyltrichlorosilane mixtures. The invention comprises heating a mixture of the close-boiling chloro- silanes with sulfolane to distill the lower-boiling chlorosilane from the mixture and thereafter separating the sulfolane and the high-boiling chlorosilane.

431846

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