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Reaction device and method for producing methyl propionate

A methyl propionate and reaction device technology, which is applied in the field of reaction devices for the production of methyl propionate, can solve the problems of reducing reaction efficiency and increasing the difficulty of separation steps, and achieves the goals of controlling accumulation, ensuring continuous stability, and realizing recycling Effect

Active Publication Date: 2015-04-22
SOUTHWEST RES & DESIGN INST OF CHEM IND
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These tars can reduce reaction efficiency and make subsequent separation steps more difficult

Method used

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  • Reaction device and method for producing methyl propionate
  • Reaction device and method for producing methyl propionate

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Experimental program
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Embodiment 1

[0025] Such as figure 1 As shown, a reaction device for producing methyl propionate includes a static mixer, a carbonylation reactor and a flash evaporator connected in sequence, the top of the flash evaporator is connected with the light removal tower, and the bottom of the flash evaporator is connected with the catalyst recovery reaction The tail gas from the light removal tower enters the tail gas treatment system after passing through the condenser, and the bottom of the light removal tower is connected with the rectification and refining system; the catalyst recovery reactor is connected with the liquid-liquid separation tower, through the The upper layer material separated by the liquid-liquid separation tower enters the tar incineration system, and the obtained heavy phase returns to the carbonylation reactor. A gas distributor (not shown in the figure) is provided at the bottom of the carbonylation reactor.

[0026] For a schematic diagram of the process flow, see fi...

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Abstract

The invention relates to a reaction device and a reaction method for producing methyl propionate. The reaction device comprises a static-state mixer, a carbonylation reactor, a flash evaporator, a light component removal tower, a catalyst recycling reactor and a liquid-liquid separation tower. According to the device and the method, a product which contains tar and is discharged by the carbonylation reactor is subjected to flash evaporation and separation; byproducts with low molecular weight produced in the reaction process is separated by using the light component removal tower; precious metal ions, methanol, propionic acid and methyl propionate are extracted by using warm water; a part of heavy phases which come out of the flash evaporator is fully mixed with the water, so that a part of organic matters with low molecular weight in the heavy phase and the precious metal ions are dissolved into a water phase; the separation of the tar and the water phase is realized in the liquid-liquid separation tower, and a water-phase mixture is finally sent back to the carbonylation reactor, so that the accumulation of the tar in the reaction system is reduced, and the loss of methanol is reduced.

Description

technical field [0001] The invention belongs to the field of chemical preparation methods, in particular to a reaction device and method for producing methyl propionate. Background technique [0002] Methyl propionate is a colorless and transparent organic liquid, which is widely used as a solvent for high-grade food and cosmetics, and can also be used as an excellent additive, preservative or fragrance in some foods and feeds. Methyl propionate is usually obtained by the esterification reaction of propionic acid and methanol. The main source of propionic acid in China is the by-product propionic acid produced during the carbonylation of methanol to acetic acid. As the demand for propionic acid increases, the oxo synthesis of methyl propionate is also on the agenda. In the process of carbonylation into methyl propionate, noble metal ion compounds are generally used as catalysts, such as palladium compounds. As the reaction proceeds, higher molecular weight compounds in the...

Claims

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Application Information

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IPC IPC(8): C07C69/24C07C67/08B01J19/00
CPCY02P20/584C07C67/08C07C51/14C07C67/48C07C67/54C07C53/122C07C69/24
Inventor 谭平华陈耀壮毛震波赖崇伟熊国炎陶川东李军王晓莉刘璇乔莎
Owner SOUTHWEST RES & DESIGN INST OF CHEM IND
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