A kind of preparation method of 2-chloropropenyl isothiocyanate
A technology of chloropropenyl isothiocyanate and dichloropropene, which is applied in the field of preparation of 2-chloropropenyl isothiocyanate, can solve the problems of unsuitable for green and clean industrial production, complex experimental operation, and secondary environmental pollution and other problems, to achieve the effect of less three wastes, simple process and high safety factor
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Embodiment 1
[0027] A kind of preparation method of 2-chloropropenyl isothiocyanate, with 2,3-dichloropropene and ammonium thiocyanate as reaction raw material, with water as reaction solvent, under the effect of phase transfer catalyst in microreactor Prepare 2-chloropropenyl isothiocyanate, comprising the following steps:
[0028] (1) Dissolve 77.2g (1moL) ammonium thiocyanate in 85g water to obtain an aqueous solution of ammonium thiocyanate; stir and dissolve 2.3g of a phase transfer catalyst (tetrabutylammonium chloride) in an aqueous solution of ammonium thiocyanate , to obtain a mixed solution.
[0029] (2) The selected microreactor (commercially available) includes 10 reaction modules, and each reaction module is combined in series, numbered sequentially from the entrance to the exit as the first reaction module, the second reaction module, the third reaction module, and the fourth reaction module. module, fifth reaction module, sixth reaction module, seventh reaction module, eigh...
Embodiment 2
[0032] A kind of preparation method of 2-chloropropenyl isothiocyanate, with 2,3-dichloropropene and ammonium thiocyanate as reaction raw material, with water as reaction solvent, under the effect of phase transfer catalyst in microreactor Prepare 2-chloropropenyl isothiocyanate, comprising the following steps:
[0033] (1) Dissolve 77.2g (1moL) of ammonium thiocyanate in 85g of water to obtain an aqueous solution of ammonium thiocyanate; stir and dissolve 2.3g of a phase transfer catalyst (tetrabutylammonium bromide) in an aqueous solution of ammonium thiocyanate , to obtain a mixed solution.
[0034] (2) The selected microreactor includes 10 reaction modules, and each reaction module is combined in series, numbered sequentially from the entrance to the exit as the first reaction module, the second reaction module, the third reaction module...the tenth reaction module. Control the temperature of each reaction module in the microreactor to be 80 DEG C, the mixed solution obta...
Embodiment 3
[0037] A kind of preparation method of 2-chloropropenyl isothiocyanate, with 2,3-dichloropropene and ammonium thiocyanate as reaction raw material, with water as reaction solvent, under the effect of phase transfer catalyst in microreactor Prepare 2-chloropropenyl isothiocyanate, comprising the following steps:
[0038] (1) 77.2g (1moL) ammonium thiocyanate was dissolved in 85g water to obtain an aqueous solution of ammonium thiocyanate; 2.3g of phase transfer catalyst (benzyltriethylammonium bromide) was stirred and dissolved in ammonium thiocyanate aqueous solution to obtain a mixed solution.
[0039] (2) The selected microreactor includes 10 reaction modules, and each reaction module is combined in series, numbered sequentially from the entrance to the exit as the first reaction module, the second reaction module, the third reaction module...the tenth reaction module. Control the temperature of each reaction module in the microreactor to be 80 DEG C, the mixed solution obt...
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