Triphenyl phosphite processing and tail gas treating technology based on graphite condenser

Abstract

The invention discloses a triphenyl phosphite processing and tail gas treating technology based on a graphite condenser. The graphite condenser is arranged to reduce the metal ion content of triphenylphosphate, greatly shorten the distillation time and reduce the side reactions of semi-finished triphenyl phosphate, so the precision of the triphenyl phosphate can reach 99.5% or more, the color ofthe triphenyl phosphate is improved, customer needs are met, and the energy consumption required for distillation is greatly reduced; a falling film generator is lifted up to greatly increase the absorption efficiency of esterified hydrogen chloride tail gas, and subsequent water washing, alkali washing and activated carbon adsorption are combined to reduce the content of toxic hydrogen chloride tail gas emission; and gas-liquid classification, alkali washing and activated carbon adsorption of distillation vacuum pump exhaust gas generated in the distillation process are also arranged, so thetechnology has the advantages of improvement of recycling of benzene liquids, reduction of the concentration of the tail gas, energy saving, environmental protection, reliable process, ensuring of thequality of triphenyl phosphite, and good application prospect.

Description

technical field [0001] The invention relates to the technical field of electronic equipment, in particular to a process for processing triphenyl phosphite and tail gas treatment based on a graphite condenser. Background technique [0002] Triphenyl phosphite, molecular formula C 18 h 15 o 3 P is a representative variety of phosphorus antioxidants. It is a chelating agent and stabilizer in PVC products. It is in great demand in the production and processing of the chemical industry. At present, there are following deficiencies in the triphenyl phosphite production process, as follows: [0003] (1) Long-term distillation (12-14h) is required for the esterified triphenyl phosphite to remove excess phenyl ester. However, triphenyl phosphite will produce side reactions during the distillation process, which will make phosphorous acid The color of the finished product of triphenyl ester changes, which affects the quality of triphenyl phosphite and the color is not enough; [...

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Problems solved by technology

[0005] (3), in the process of esterification and distillation of triphenyl phosphite, a large amount of toxic gas hydrogen chloride will be produced, which needs to be treated to avoid pollution to the atmosphere. The installation height of the falling film generator adopted in the prior art is Limited to about 3m, the absorption effect of hydrogen chloride tail gas;

[0006] (4) During the long-term distillation of triphenyl phosphite, side reactions will occur. The existing triphenyl phosphite content can only reach 99%, which sometimes fails to meet the needs of customers

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