Apparatus and method for continuous production of eco-friendly plasticizer

Abstract

Disclosed is an apparatus and method for continuous production of an eco-friendly plasticizer. The method comprises: adding materials including solid acid and liquid alcohol to a preheating dehydration kettle, performing stirring and heating till the materials are free of water, and taking the materials out, so that preheating dehydration of materials are achieved; conveying the reaction materialobtained via preheating dehydration from the preheating dehydration kettle to series multiple stages of esterification reaction vessels via a pump or high differential pressure, adding a catalyst to afirst-stage esterification reaction vessel, and performing stirring and heating to carry out a reaction; and with continuous feeding of the reaction material, when the reaction material in one esterification reaction vessel reaches the upper discharging port of the vessel, conveying the reaction material to the next-stage esterification reaction vessel to perform a continuous reaction, regulatingthe flow of the material that enters the esterification reaction vessel, and conveying the material liquid after the reaction is over to a dealcoholization kettle for continuous dealcoholization. Theapparatus is reasonable in layout, simple in operation, high in production efficiency, and stable in operation. The yield per unit time is efficiently increased, and continuous and large-scale massive production of the eco-friendly plasticizer is achieved.

Description

technical field [0001] The invention belongs to the technical field of preparation of environment-friendly plastic additives, in particular to a method for continuously producing environment-friendly plasticizers. Background technique [0002] Cables are known as the "blood vessels" and "nerves" of the national economy. The wire and cable manufacturing industry is one of the largest supporting industries in the national economy. It is the second largest industry in the machinery industry after the automobile industry. Wire and cable products are widely used in energy, transportation, communications, automobiles, and petrochemical industries. In recent years Since then, my country's wire and cable industry has maintained a momentum of rapid development and continues to occupy an important position in the national economy. With the improvement of the country's industrialization development level, the improvement of infrastructure construction, and the improvement of urbanizati...

AI Technical Summary

Problems solved by technology

[0004] At present, the industrial production of DOTP mainly adopts the batch method, which mainly has the following disadvantages: 1) the batch production takes a long time, the product quality fluctuates greatly, and is not stable; 2) the process is backward, and the labor intensity is large; 3) the energy consumption of batch esterification , high material consumption, low product yield; 4) small scale, unable to achieve large-scale production, restricting the output of plasticizers

Because the reaction uses a large amount of recycled PTA material as raw material, the particle size is uneven, resulting in poor compatibility of solid-liquid esterification reaction and long reaction time.

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