二环戊基二甲氧基硅烷的合成工艺研究

介绍了以二环戊基二氯硅烷(DCPDCS)为中间产物合成二环戊基二甲氧基硅烷（DCPDMS）的方法。首先研究了合成DCPDCS的最佳工艺条件：反应压力1.0~1.2 MPa，n(二氯硅烷)/n(环戊烯)= 1.16/1.00，反应温度85~95 C，催化剂用量1.2 g，异辛醇用量2.3 g，反应时间6~7 h，环戊烯转化率可达96%以上，DCPDCS收率可达88%以上。DCPDMS的合成条件：第一阶段n(甲醇)/n(DCPDCS)=1.33，反应温度为室温；第二阶段n(甲醇)/n(DCPDCS)=4.95，反应温度低于50 C，DCPDCS转化率为87.6%，DCPDMS收率为79.5%。

STUDY ON THE SYNTHESIS OF DICYCLOPENTYLDIMETHOXYSILANE

Dicyclopentyldimethoxysilane (DCPDMS) was synthesized by the addition of silicon hydride method and the reaction conditions were studied. Firstly, dicyclopentyldichlorosilane (DCPDCS), a reaction intermediate, was prepared under the optimal conditions of a reaction pressure range of 1.0-1.2 MPa, a n(dichlorosilane)/n(cyclopentene) of 1.16, a reaction temperature range of 85-95℃, a catalyst dosage of 1.2 g, an isooctyl alcohol dosage of 2.3 g and a reaction time range of 6-7 h. The conversion of cyclopentene and the yield of DCPDCS were 96.2% and 88.9%, respectively. Then DCPDMS was synthesized under the following reaction conditions: in the first reaction stage and the second reaction stage, the n(methanol)/n(DCPDCS) was 1.33 and 4.95, respectively; the reaction temperature was ambient temperature and below 50℃, respectively. The conversion of DCPDCS reached 87.6%, and the DCPDMS yield was 79.5%.