Refining equipment and refining process for phosphorus trichloride

Abstract

The invention discloses refining equipment and a refining process for phosphorus trichloride. The refining equipment comprises a reaction kettle, a cooling-water machine and a rectifying tower which are arranged from left to right, and also comprises: a cooling mechanism, which is detachably arranged on the outer wall of the reaction kettle; cold water pipes, one ends of which are respectively connected to a water inlet and a water outlet of the cooling-water machine, and the other ends of which are connected to the cooling mechanism; and a scrubbing mechanism, which is detachably arranged atthe top of the rectifying tower. The refining equipment can enable a heat dissipation cylinder to perform heat absorption comprehensively on the reaction kettle, avoids explosion caused by too high temperature during use of the reaction kettle, in addition, the inner wall of the rectifying tower can be comprehensively scrubbed to prevent free phosphorus impurities from hanging on the inner wall ofthe rectifying tower, and influence on the re-rectifying effect of phosphorus trichloride can be prevented, therefore the equipment is beneficial to the production and use of phosphorus trichloride.

Description

technical field [0001] The invention relates to the technical field, in particular to a phosphorus trichloride refining equipment and a process thereof. Background technique [0002] Phosphorus trichloride is an important chemical intermediate, widely used in organophosphorus pesticides, medicine, electronics, and dye industries, and is a rare catalyst and phosphorus solvent. In the refined production of phosphorus trichloride, it mainly includes the steps of melting, reaction, rectification, cooling and separation, and reaction and rectification are the most critical links in the process of phosphorus trichloride; [0003] Add yellow phosphorus, phosphorus trichloride mother liquor and chlorine gas into the reaction kettle to form phosphorus trichloride. During the reaction, the reaction speed is relatively fast and a large amount of heat will be generated. If the temperature cannot be lowered in time, it will easily cause an explosion. The distillation tower is used for t...

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Problems solved by technology

[0004] The object of the present invention is to provide a kind of phosphorus trichloride refining equipment and its process, to at least solve the problem of difficulty in cooling the reaction kettle and insufficient thorough cleaning of the rectifying tower in the prior art

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