A production system and process for dimethyl succinate

By introducing a diesterization pre-reactor and compressor into the dimethyl succinate production system and optimizing the methanol recovery process, the problem of high energy consumption in methanol recovery in existing technologies has been solved, achieving efficient dimethyl succinate production, reducing energy consumption and improving conversion rate and product purity.

CN118384521BActive Publication Date: 2025-10-28CHINA NAT PETROLEUM CORP +1
2 Cites 0 Cited by

Patent Information

Application Number
CN202410334572.7
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2024-03-22
Publication Date
2025-10-28
Estimated Expiration
2044-03-22

AI Technical Summary

Technical Problem

In the existing dimethyl succinate production process, methanol recovery has high energy consumption, resulting in large energy consumption and low reactant conversion rate.

Method used

A dimethyl succinate production system is adopted, including a monoesterification reactor, a diesterification pre-reactor, a diesterification reactive distillation column, a methanol recovery column, and a compressor. By setting up a diesterification pre-reactor and a compressor, the liquefaction and vaporization processes of gaseous methanol are reduced, the reactant conversion rate is improved, and gaseous methanol is used as a heat source for preheating, thereby reducing energy consumption.

Benefits of technology

It significantly reduces the energy consumption of methanol recovery, improves the conversion rate of reactants, reduces production costs, and improves the utilization rate of hydrogen, with product purity reaching over 99%.

✦ Generated by Eureka AI based on patent content.
Patent Text Reader

Abstract

This application discloses a production system and process for dimethyl succinate. The system includes a monoesterification reactor, a diesterification pre-reactor, a diesterification reactive distillation column, a methanol recovery column, a compressor, and a hydrogenation unit. The diesterification reactive distillation column has a bottom vapor inlet, a bottom outlet, a middle inlet, and a top vapor outlet. The methanol recovery column has a mixed steam inlet and a methanol vapor outlet. The outlet of the monoesterification reactor is connected to the inlet of the diesterification pre-reactor, and the outlet of the diesterification pre-reactor is connected to the middle inlet of the diesterification reactive distillation column. The top vapor outlet of the diesterification reactive distillation column is connected to the mixed steam inlet of the methanol recovery column, the methanol vapor outlet of the methanol recovery column is connected to the compressor inlet, and the compressor outlet is connected to the bottom vapor inlet of the diesterification reactive distillation column. Using the system described in this application to produce dimethyl succinate can reduce the energy consumption for methanol recovery.
Need to check novelty before this filing date? Find Prior Art