Method and device for preparing methyl formate by methanol carbonylation

Abstract

This invention discloses methanol carbonylation way preparing methyl formate method and its equipment. According to weight percentage, 62-68 percent methanol, 31-38 percentage carbon monoxide and 0.15-0.2 percent catalyst are filled into reactor, methyl formate synthesis reaction is done under condition of temperature 75-95 degrees centigrade, reaction system pressure is 2.0-4.0MPa. Reaction product vapor through methyl formate separating area, condenser and tail condenser, methyl formate crude product mixed liquor is got from gas phase condensation separating. Large methanol circulation and high catalyst consumption in existing technique is solved in this invention, and in existing method, methyl formate content maintains balance concentration in liquor phase, so the synthesis reaction driving force is not strong, and crude methyl formate content is low.

Description

technical field [0001] The invention relates to a method for preparing methyl formate and a device thereof, in particular to a method for preparing methyl formate by a methanol carbonylation method and a device thereof. Background technique [0002] Methyl formate (methyl formate, MeF, MF) is an important methanol derivative and one of the important chemical raw materials. The traditional preparation method of methyl formate is synthesized by the esterification reaction of formic acid and methanol. Since the 1980s, new methyl formate synthesis methods have been continuously developed and researched, especially the methanol carbonylation method and methanol dehydrogenation method used in industrial production to prepare methyl formate, which has greatly reduced the cost of producing methyl formate and also It has promoted the continuous expansion of the application field of methyl formate. [0003] At present, the process of producing methyl ...

AI Technical Summary

Problems solved by technology

Due to the limitation of the reaction balance, when the reaction liquid is extracted from the circulating material at the bottom of the reactor, the content of methyl formate in the extracted material is too low, wherein the content of methyl formate is 18-25% by weight percentage, and methanol The content of methyl formate is 75-82%, and the load of methanol circulation separation in the methyl formate separation system is too large, and the catalyst is discharged from the synthesis system together with the material, and the catalyst consumption is high, causing certain pollution to the system and the environment

Due to the fact that the content of methyl formate in the liquid phase always maintains a concentration close to equilibrium in this process, the driving force for the synthesis reaction of methyl formate is not large, the equipment of the production device is relatively large, the efficiency is low, the operation is complicated, and the production capacity per unit product High consumption

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