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Citation: HUANG WEN-JEN, FANG HUI-LING, CHEN CHANG. STUDIES ON CATALYTIC CRACKING OF THE HYDROLYSATE PRODUCT OF DIMETHYLDICHLOROSILANE——Ⅱ. PREPARATION OF OCTAMETHYLCYCLOTETRASILOXANE BY CRACKING WITH POTASSIUM SILANOLATE[J]. Acta Polymerica Sinica, ;1964, 6(2): 142-144. shu

STUDIES ON CATALYTIC CRACKING OF THE HYDROLYSATE PRODUCT OF DIMETHYLDICHLOROSILANE——Ⅱ. PREPARATION OF OCTAMETHYLCYCLOTETRASILOXANE BY CRACKING WITH POTASSIUM SILANOLATE

Dimethyldichlorosilane (55.14-55.31% Cl) was hydrolysed continuously with 8% aqueous hydrochloric acid and the hydrolysate product (a mixture of siloxanes) was cracked continuously with a preformed solution of potassium silanolate under reduced pressure (10-20mm Hg). By this means the fraction of octamethylcyclotetrasiloxane was obtained in 92-96% yield (based on dimethyldichlorosilane). The cracking conditions were discussed.
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