Method for distilling hexamethylcyclotrisiloxane

Details Method for distilling hexamethylcyclotrisiloxane Method for distilling hexamethylcyclotrisiloxane

1996-06-03

1997-08-26

Manoharan, Virginia

Distillation: processes, separatory

With measuring, testing or inspecting

203 6, 203 68, 203 69, 203 70, 556460, B01D 334, C07F 720

Patent

active

056606907

ABSTRACT:
The invention relates to an improved distillation method wherein hexamethylcyclotrisiloxane is isolated from a crude blend thereof by mixing the crude blend with a hydrocarbon co-solvent having a normal boiling point of 125.degree. C. to 150.degree. C. and distilling the resulting mixture in an apparatus having a reboiler, a fractionating column and a condenser, whereby deposition of solid hexamethylcyclotrisiloxane in the condenser is eliminated.

REFERENCES:
patent: 4774346 (1988-09-01), Imai
patent: 5233068 (1993-08-01), Fukushima et al.
patent: 5399649 (1995-03-01), Okawa

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