Continuous evaporative crystallization device and method for 4-cyanopyridine
A cyanopyridine and evaporation crystallization technology, which is applied in the field of 4-cyanopyridine continuous evaporation crystallization equipment, can solve the problems of difficult control of evaporation temperature and less 4-cyanopyridine crystal content, and achieve a complete and reasonable structure and simplified crystallization Operation steps, the effect of increasing the amount of crystallization
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[0028] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0029] see figure 1 , a 4-cyanopyridine continuous evaporation and crystallization device, including a pressurized assembly 1, a connecting pipe 2, an airtight pump 3 and an evaporation reactor 4, the front end of the pressurized assembly 1 is installed with a connecting pipe 2, and the connecting pipe 2 is equipped with a gas A compact pump 3, and an evaporation reactor 4 is installed at the end of the connecting pipe 2.
[0030] see figure 2 , the pressur...
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