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Production method for preparing acetic acid through carbonylation of methanol

A technology of methanol carbonylation and production method, which is applied to the preparation of carboxylic acid by carbon monoxide reaction, chemical instruments and methods, separation/purification of carboxylic acid compounds, etc., can solve the problems of complex production process, multiple equipment and operation control points of the whole set of equipment , to achieve the effect of reducing the number and cost of equipment, reducing equipment and control units, and simplifying the process flow

Inactive Publication Date: 2014-12-31
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] In the prior art, it is usually necessary to set up a separate gas-liquid separation device to discharge and recover the gas phase at the top of the reactor, which requires more equipment and operation control points, making the whole set of equipment and production process complicated

Method used

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  • Production method for preparing acetic acid through carbonylation of methanol
  • Production method for preparing acetic acid through carbonylation of methanol
  • Production method for preparing acetic acid through carbonylation of methanol

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Embodiment 1

[0063] This embodiment is used to illustrate the production method of methanol carbonylation to produce acetic acid provided by the present invention.

[0064] according to figure 1 The process flow shown carries out the production of methanol carbonylation to acetic acid.

[0065] (1) Carbonylation reaction. In reactor 1 (zirconium material), put the reaction solution that catalyst and solvent are mixed into, wherein based on the total weight of catalyst and solvent, Rh containing 200 wtppm, Ir of 1500 wtppm, Ru of 2000 wtppm, 8% by weight of methyl iodide, 5% by weight of water, 12% by weight of methyl acetate, and the remainder being acetic acid. The materials methanol and CO are continuously fed into the reaction kettle 1 (zirconium material) according to the molar ratio of 1:1.05-1.15, contact with the reaction liquid in the reaction kettle 1, and carry out the carbonylation reaction under the carbonylation reaction conditions, the reaction The temperature is 190°C, an...

Embodiment 2

[0071] This embodiment is used to illustrate the production method of methanol carbonylation to produce acetic acid provided by the present invention.

[0072] according to figure 1 The process flow shown carries out the production of methanol carbonylation to acetic acid.

[0073] (1) Carbonylation reaction. In reactor 1 (zirconium material), put the reaction solution that catalyst and solvent are mixed into, wherein based on the total weight of catalyst and solvent, Rh containing 150 wtppm, Ir of 2000 wtppm, Ru of 1500 wtppm, 10% by weight of methyl iodide, 6% by weight of water, 13% by weight of methyl acetate, and the remainder being acetic acid. The materials methanol and CO are continuously fed into the reaction kettle 1 (zirconium material) according to the molar ratio of 1:1.05-1.10, contact with the reaction liquid in the reaction kettle 1, and carry out the carbonylation reaction under the carbonylation reaction conditions, the reaction The temperature is 188°C, a...

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Abstract

The present invention discloses a production method for preparing acetic acid through carbonylation of methanol. According to the method, the gas phase portion on the top portion of the reaction kettle is directly conveyed into the flash evaporation tower. With application of the method to carry out carbonylation on methanol so as to produce the acetic acid, the CO conversion rate is 95%, the process can be simplified, and the equipment investment can be reduced.

Description

technical field [0001] The invention relates to a method for producing acetic acid by carbonylation of methanol. Background technique [0002] Acetic acid is one of the important organic chemical raw materials. It is mainly used in the production of vinyl acetate, acetic anhydride, cellulose acetate, acetates, terephthalic acid, chloroacetic acid, etc. It can be widely used in chemical industry, light industry, textile, medicine, Printing and dyeing and other fields. At present, the main methods of producing acetic acid are acetaldehyde oxidation, olefin direct oxidation and methanol carbonylation. Among them, the methanol carbonylation method has the advantages of high methanol conversion rate and small by-products, and has gradually become one of the main methods for the production of acetic acid. [0003] The process of methanol carbonylation to produce acetic acid mainly includes two parts: CO gas generation and acetic acid production. Taking natural gas as raw materi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C53/08C07C51/12
CPCC07C51/12B01J31/0231B01J2231/321C07C51/42C07C51/44C07C53/08
Inventor 吕顺丰黄凤兴王世亮李彤刘博秦燕璜
Owner CHINA PETROLEUM & CHEM CORP
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