二甲基硅二醇的合成

本文报道了二甲基二氯硅烷直接水解制备二甲基硅二醇的过程，考察了二甲基二氯硅烷、水、乙醚在不同的投料比下产品二甲基硅二醇的收率。当水的加入量为理论需求量的１～１．０２５倍，乙醚的加入量为２．５～３Ｌ／ｍｏｌ（ＣＨ＿３）＿２ＳｉＣｌ＿２时，产品的收率在７０％以上。实验中选择了苯胺为氯化氢的吸收剂。所得产品为白色有光泽的鱼鳞片状物质，经熔点测定，Ｃ、Ｈ、Ｓｉ元素分析及电子轰击质谱测定，所得产品确系纯度较高的二甲基硅二醇。实验中考察了二甲基硅二醇产品的储存稳定性，室温下存放期不超过９０天，低温冷冻存放刚可超过一年。

SYNTHESIS OF DIMETHYLSILANEDIOL

Abstract The present paper is to report the prepa-ration of dimethylsilanediol by direct hydroly-sis of dimethyldichlorosilane using aniline ashydrogen chloride acceptor,The effect of theratio among dimethyldichlorosilane, water andether on hydrolysis reaction was studied。wbcn the ratio of (CH_3)_2SiCl_2∶H_2O∶C_2H_5OC_2H_5=1(mol)∶2～2. 05(mol)∶2.5～3(L)was uded ,the percentage yield of dimethylsilanediil woild reach 70% at 0～5℃.The dimethylsilanediol prepared with the experiments is a white shiny fluffy solid of flaky crystals melting at6 94～97℃,and has been kept for one year at-18℃.