PBTC esterification reaction kettle and process

Abstract

The invention relates to the technical field of esterification processing, in particular to a PBTC esterification reaction kettle and process, the PBTC esterification reaction kettle comprises a shell device, a reaction cylinder, a stirring device and a liquid supplementing device, the reaction cylinder is connected to the interior of the shell device, the stirring device is placed above the shell device, and the liquid supplementing device is connected to the stirring device. The reaction kettle can solve the problems that when an existing reaction kettle carries out esterification reaction on methanol, maleic anhydride and a solid acid catalyst, the methanol needs to be manually added into the reaction kettle through a methanol dropwise adding pipe penetrating into the bottom of the reaction kettle, so that the manual operation steps are increased, the methanol adding convenience is reduced and the like. The liquid supplementing device has the function of automatically supplementing liquid according to the change of the weight of the raw material in the esterification reaction process, so that the operation of manual liquid supplementing is reduced, the convenience of liquid supplementing is improved, liquid supplementing from the bottom of the raw material can be ensured, and the liquid supplementing effect is improved.

Description

technical field [0001] The invention relates to the technical field of esterification processing, in particular to a PBTC esterification reaction kettle and a process. Background technique [0002] PBTC refers to tricarboxylic acid. In the production process of PBTC, methanol, maleic anhydride and solid acid catalysts need to be placed in the reactor for esterification reaction. Esterification reaction is a kind of organic chemical reaction, mainly alcohol and carboxylic acid or The reaction of inorganic oxyacids to form esters and water. [0003] At present, when the existing reactor is used for the esterification reaction of methanol, maleic anhydride and solid acid catalyst, there are usually the following deficiencies: 1. The existing reactor needs to manually add methanol to the bottom of the reactor through the methanol dripping pipe. 2. The outlet of the existing reactor is prone to clogging with the solid acid catalyst at the outlet of the liquid replenishment pipe ...

AI Technical Summary

Problems solved by technology

[0003] At present, when the existing reactor is used for the esterification reaction of methanol, maleic anhydride and solid acid catalyst, there are usually the following deficiencies: 1. The existing reactor needs to manually add methanol to the bottom of the reactor through the methanol dripping pipe. 2. The outlet of the existing reactor is prone to clogging with the solid acid catalyst at the outlet of the liquid replenishment pipe during liquid replenishment, and the raw materials are being stirred It is easy for the feed liquid to flow back into the liquid replenishing pipe, which will affect the esterification reaction and hinder the normal progress of the esterification reaction.

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