(3-Chloropropyl)triethoxysilane → 3-(Triethoxysilyl)propyl thiocyanate

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After a solution of chloropropyltriethoxysilane and sodium thiocyanate react in ethanol to form a thiocyanatopropyltriethoxysilane suspension, salt resulting from the reacting step is removed from the ethanol-containing centrifugate and washed. The first embodiment for manufacturing thiocyanatopropyltriethoxysilane includes adding the wash ethanol to the solution in the reacting step, distilling the centrifugate to remove ethanol, and removing solids from a thiocyanatopropyltriethoxysilane residue resulting from the distilling step. The ethanol from the distilling step may be used to wash the salt separated in the centrifugating step. The second embodiment in the process for manufacturing thiocyanatopropyltriethoxysilane includes distilling a thiocyanatopropyltriethoxysilane suspension to form distilled ethanol and a thiocyanatopropyltriethoxysilane residue, and centrifugating the residue to separate salt resulting from the reacting step from the centrifugate to obtain a thiocyanatopropyltriethoxysilane product. The distilled ethanol can be used to wash the salt, and the ethanol from the washing step can be added to the solution in the reacting step.

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