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Vacuum distillation process of purifying industrial P2S5

A technology of phosphorus pentasulfide and distillation method, which is applied in the direction of phosphorus sulfur/selenium/tellurium phosphorus compounds, etc., and can solve the problem of insufficient purification depth of phosphorus pentasulfide products

Inactive Publication Date: 2007-01-03
HUBEI XINGFA CHEM GRP CO LTD
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Problems solved by technology

[0003] The purpose of this invention is to provide a method for purifying industrial phosphorus pentasulfide by vacuum distillation, which can overcome the shortcomings of insufficient purification depth of industrial phosphorus pentasulfide purified by simple distillation, and increase the concentration of phosphorus pentasulfide by one percentage point to reach more than 99%. , can fully meet the quality index requirements of high-purity phosphorus pentasulfide raw materials for the production of lubricating oil additives

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Embodiment Construction

[0006] A method for purifying industrial phosphorus pentasulfide by vacuum distillation. The synthetic product of phosphorus pentasulfide from the reaction kettle is pressed into the vacuum distillation kettle in batches. The pressure in the distillation kettle is 550mmHg, and the boiling point temperature of phosphorus pentasulfide under the pressure is 500°C by electric heating. The phosphorus pentasulfide evaporates continuously, and its steam passes through the condenser, condenses at 280°C, and then enters the refined phosphorus pentasulfide product storage tank at atmospheric pressure to obtain a phosphorus pentasulfide product with a purity of 99%.

[0007] When the vacuum degree is -260mmHg, because the impurity components have little change in boiling point relative to phosphorus pentasulfide, most impurities with a boiling point between 500°C and 514°C remain in the liquid phase after decompression. Therefore, compared with simple distillation under normal pressure (7...

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Abstract

The present invention discloses vacuum distillation process of purifying industrial P2O5. The P2O5 synthesizing product from reaction kettle is pressurized to the vacuum distilling still at 550 mmHg pressure and heated electrically to the boiling point, 500 deg.c, of P2O5, so as to evaporate P2O5 continuously, and the vapor is made to pass through the condenser and condensed at 280 deg.c to form P2O5 product of 99 % purity fed to storage tank. The present invention can obtain P2O5 product of 99 % purity, and the product can meet the quality requirement for producing lubricant additive.

Description

technical field [0001] The invention relates to a purification treatment method of industrial phosphorus pentasulfide, in particular to a method for purifying industrial phosphorus pentasulfide by vacuum distillation. Background technique [0002] When the domestic chemical industry uses industrial phosphorus pentasulfide directly as raw materials for the production of pesticides or lubricating oil additives, most of them do not undergo purification treatment, so that the impurities in industrial phosphorus pentasulfide have adverse effects on the purity of its own products and the quality of downstream products. At present, Hubei Xingfa Chemical Group Co., Ltd. uses a simple distillation method to purify industrial phosphorus pentasulfide. Although it can obtain industrial phosphorus pentasulfide products with a purity of 98%, the purification depth is not enough to meet the quality requirements of high-purity phosphorus pentasulfide raw materials fo...

Claims

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Application Information

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IPC IPC(8): C01B25/14
Inventor 万和之苗刚邓荣臻范守成
Owner HUBEI XINGFA CHEM GRP CO LTD
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