- A cyano group Trialkoxysilanes synthetic method
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The invention relates to a synthetic method of thiocyano propyl trialkoxysilane, which belongs to the field of organic chemistry. According to the invention, a self-made catalyst is employed, chloropropyltrialkoxysilane and sodium sulfocyanate are used for synthesis of thiocyano propyl trialkoxysilane and common salt under certain reaction condition, filter residue of common salt can be filtered and separated, the filter residue is washed by a corresponding alcoholic solution, the washing lotion recovers the corresponding alcohol under normal pressure, and is distilled with crude product to obtain the thiocyano propyl trialkoxysilane product. The thiocyano propyl trialkoxysilane product has the characteristics of high quality, good stability, little impurity, no waste material discharge, no environmental pollution, and easy industrial production.
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Paragraph 0024-0026
(2017/12/06)
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- PROCESS FOR PREPARATION OF THIOCYANATO[!MINUS!]BEARING ORGANOALKOXYSILANES
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A process for the preparation of (D) thiocyanato-bearing organoalkoxysi lanes represented by the general formula (3) NCS-R1-Si(OR2)nR33-n (where R1 is a divalent hydrocarbon group having 1 to 6 carbon atoms, R2 and R3 are monovalent hydrocarbon groups, and the subscript n is 0 to 3), in which (A) a thiocyanic acid salt represented by the general formula (1) MSCN (where M stands for an alkali metal) and (B) a halogenated alkylalkoxysilane represented by the general formula (2) XR1Si(OR2)nR33-n (where X is a halogen atom, and R1, R2, R3, and the subscript n are the same as above) are reacted in the presence of (C) a phase transfer catalyst.
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Page column 4
(2008/06/13)
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