Process and system for producing cyclohexane plasticizer by liquid phase hydrogenation of o-benzene plasticizer

Abstract

The invention relates to a process and a system for producing a cyclohexane plasticizer by liquid phase hydrogenation of an o-benzene plasticizer. The process for preparing a cyclohexane plasticizer by liquid phase hydrogenation of an o-benzene plasticizer comprises the following steps: (1) heated inert gas is introduced into the bottom of a reduced pressure distillation tower in a pulse pneumaticconveying manner; and (2) a plasticizer product is preheated and then enters the bottom of the reduced pressure distillation tower, and the inlet of the plasticizer product on the reduced pressure distillation tower is higher than the inlet of the inert gas, so that the plasticizer product is mixed and heated with the rising inert gas flow in the downward flowing process, and the target product is separated from the by-product. According to the process and the system disclosed by the invention, heated inert gas is fed into the reduced pressure distillation tower in a pulse manner, and the characteristic that the flow of inert gas is changing is utilized to better simulate the characteristics of fluidization, mixing and heating at the bottom of the reduced pressure distillation tower, so that better mixing, heating, separation and purification effects on the plasticizer product are realized.

Description

technical field [0001] The invention relates to the field of preparing cyclohexane plasticizers by liquid-phase hydrogenation of ortho-benzene plasticizers, in particular to a production process and system for preparing cyclohexane-type plasticizers by liquid-phase hydrogenation of ortho-benzene plasticizers. Background technique [0002] At present, plasticizers are the largest additives in the modern plastics industry. They play a decisive role in promoting the development of the plastics industry, especially the PVC industry. They also have a wide range of applications in synthetic rubber, coatings, adhesives, and sealing materials. Applications. Studies have shown that the traditional production equipment for preparing plasticizers has long process reaction time, high energy consumption, low output per unit time, unstable product quality, high moisture content and high acid value in product test results. Moreover, the prepared o-phthalic plasticizer has toxicity and car...

AI Technical Summary

Problems solved by technology

Studies have shown that the traditional production equipment for preparing plasticizers has long process reaction time, high energy consumption, low output per unit time, unstable product quality, high water content and high acid value in product test results

And the prepared o-phthalic plasticizer has toxicity and carcinogenicity

Images