Method for continuously and synchronously hydrolyzing acylation reaction liquid

Abstract

The invention provides a method for continuously and synchronously hydrolyzing an acylation reaction liquid. The method is characterized in that water is introduced into a water phase pipeline of a hydrolysis section before an acylation reaction liquid is introduced into the hydrolysis section, when the water flows out of the outlet of the hydrolysis section, the acylation reaction liquid is introduced into the organic phase pipeline of the hydrolysis section, after being rapidly mixed with water in a low-temperature cold bath device, the mixture enters a micro-channel reactor to be subjected to a hydrolysis reaction, mixed liquid obtained after hydrolysis flows out of the outlet of the micro-channel reactor, the mixed liquid is collected through a liquid separator, and the hydrolysis reaction and acylation reaction of the reaction section are synchronously carried out. According to the hydrolysis method, continuous and stable synchronous hydrolysis is achieved, the material balance rate is increased, more importantly, the risk of pipeline blockage is avoided, hydrolyzed liquid can directly enter the liquid separator, synchronous liquid separation is achieved, an organic phase can be conveniently collected, and generated waste gas can be pumped out from an exhaust port in the upper end of the liquid separator.

Description

technical field [0001] The present application relates to the technical field of coal chemical industry, in particular to a method for continuous and synchronous hydrolysis of acylation reaction liquid. Background technique [0002] my country is rich in coal reserves. In today's increasingly tense energy environment, it is of great significance to develop a high value-added route for naphthalene as a measure to increase the comprehensive utilization of energy such as coal and petroleum. 2,6-naphthalene dicarboxylic acid is a key monomer for the synthesis of various high-performance polynaphthyl esters, polyurethanes, and liquid crystal polyester resins, especially polyethylene naphthalate (PEN), which is prepared by reacting with ethylene glycol. All aspects of physical and chemical properties are superior to polyethylene terephthalate (PET), which is widely used at present, and it has broad application prospects in the fields of fibers, films, packaging containers and elec...

AI Technical Summary

Problems solved by technology

[0011] 1. Intermittent or semi-continuous hydrolysis, without synchronous continuous hydrolysis, after the acylation reaction liquid is obtained first, there is a certain time interval before the hydrolysis reaction

[0012] 2. The acylation reaction solution cannot be hydrolyzed in time, and it is easy to undergo hydrolysis reaction with water in the air when placed, and HCl gas will overflow, polluting the air

[0013] 3. The hydrolysis reaction will produce Al(OH) 3 For emulsions, when the microchannel reactor is used for hydrolysis reaction, the pipeline will be blocked when the acylation reaction solution contacts with water;

[0015] 5. The liquid obtained by hydrolysis is relatively large in volume and turbid, which makes liquid separation difficult to operate and takes a long time

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