13080-95-0Relevant academic research and scientific papers
PREPARATION OF ALKOXYSILANES BY ETHERIFICATION OF CHLOROSILANES WITH REMOVAL OF HYDROGEN CHLORIDE BY VAPOR OF THE BOILING SOLVENT.
Belyakova,Pomerantseva,Efimova,Chernyshev
, p. 426 - 427 (2007/10/02)
Etherification of chlorosilanes with alcohols is the usual method of obtaining alkoxysilanes. Hydrogen chloride formed as a byproduct must be removed so as to avoid side reactions and increase the yield. The vapor of boiling solvent was used as an agent to remove hydrogen chloride from the reaction zone. Various solvents were tried and their effect on yield was studied. Removal of hydrogen chloride with the vapor of the boiling solvent during etherification of chlorosilanes makes it possible to obtain alkoxysilanes in 80-90% yield as the result of strong suppression of side reactions.
ESTERIFICATION OF CHLOROSILANES IN CYCLOHEXENE SOLUTION.
Pomerantseva,Belyakova,Shryaev,Efimova,Sheludyakov
, p. 1314 - 1315 (2007/10/02)
The authors have developed a method for production of organoalkoxysilanes by interaction of organochlorosilanes with alcohols in cyclohexene solutions in presence of catalytic amounts of tin tetrachloride. As the result of the synthesis, formation of alkoxysilanes (yield 59-91%) is accompanied by formation of cyclohexyl chloride in 73-90% yield. This compound is an intermediate for production of tricyclohexylhydroxystannane, the principal component of Plictrin. The annual demand for cyclohexyl chloride for this purpose is 250-300 tons. At the same time, cyclohexene obtained as a waste product during manufacture of Kapron is destroyed by burning. Its use as a hydrogen chloride acceptor in esterification of chlorosilanes makes it possible to obtain, virtually without additional cost, a second valuable product, cyclohexyl chloride, in a yield of 1-2 parts by weight per 1 part of organoalkoxysilane.
