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Intelligent reaction system and method for preparing acetic acid through methanol carbonylation

A technology of carbonylation reaction and methanol carbonylation, which is applied in the field of intelligent reaction system for the production of acetic acid from methanol carbonylation, and can solve problems such as error-prone, equipment blockage, and high labor costs

Inactive Publication Date: 2021-04-20
NANJING YANCHANG REACTION TECH RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, in the entire reaction process, the presence of iridium-based catalysts will cause equipment blockage as the materials enter the various reaction equipment, and the purity of the prepared acetic acid product is not enough, which affects the quality of the product.
[0004] In addition, with the rapid development of informatization, the application of intelligent systems is becoming more and more extensive. Moreover, it is easy to make mistakes through the use of human control, and the labor cost is also relatively high.

Method used

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  • Intelligent reaction system and method for preparing acetic acid through methanol carbonylation
  • Intelligent reaction system and method for preparing acetic acid through methanol carbonylation
  • Intelligent reaction system and method for preparing acetic acid through methanol carbonylation

Examples

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Embodiment 1

[0060] refer to figure 1 As shown, the intelligent reaction system for the production of acetic acid by carbonylation of methanol provided by the embodiment of the present invention mainly includes a carbonylation reactor 10 and a flash tank 20 connected in sequence, and the carbonylation reactor 10 is simultaneously fed with CO and methanol, CO From the carbon monoxide storage tank 70, the carbon monoxide storage tank 70 is connected with the carbonylation reactor 10, so as to transport CO into the inside of the carbonylation reactor 10, the methanol comes from the methanol storage tank 60, and the methanol storage tank 60 is connected with the carbonylation reactor 10 , to be used to transport methanol into the carbonylation reactor 10, and fill 1kg of iridium-based catalyst in the carbonylation reactor 10, the preparation method of the catalyst comprises: accurately measuring 100mol of 2-vinylpyridine and 100mol of ethylene base diphenylphosphine, add 600g of dibenzoyl pero...

Embodiment 2

[0067] The intelligent reaction system for methanol carbonylation to produce acetic acid provided in this embodiment mainly includes carbonylation reactor 10 and flash tank 20 connected in sequence, and carbonylation reactor 10 is fed with CO and methanol at the same time, CO comes from carbon monoxide storage tank 70, The carbon monoxide storage tank 70 is connected with the carbonylation reactor 10 for delivering CO into the interior of the carbonylation reactor 10, the methanol comes from the methanol storage tank 60, and the methanol storage tank 60 is connected with the carbonylation reactor 10 for transferring the methanol Transport into carbonylation reactor 10 inside, and fill 1kg iridium-based catalyst in carbonylation reactor 10, the preparation method of this catalyst comprises: accurately measure the 2-vinylpyridine of 200mol and the vinyl diphenylphosphine of 100mol, Add 860 g of dibenzoyl peroxide and 34 L of toluene solvent to it, react at 70 ° C for 10 h to obta...

Embodiment 3

[0074] Other operating steps are consistent with Example 2, except that the molar ratio of 2-vinylpyridine to vinyldiphenylphosphine is 5:3, and the conversion rate of methanol is 97% by measurement.

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Abstract

The invention provides an intelligent reaction system and method for preparing acetic acid through methanol carbonylation, the intelligent reaction system for preparing acetic acid through methanol carbonylation comprises a carbonylation reaction kettle and a flash tank which are connected in sequence, CO and methanol are introduced into the carbonylation reaction kettle at the same time as raw materials for carbonylation reaction, and the carbonylation reaction kettle is filled with an iridium-based catalyst; a carbonylation product from the carbonylation reaction kettle enters the flash tank for flash evaporation to obtain a liquid-phase component and a gas-phase component; and the gas-phase component enters a gas-phase rectifying tower to be rectified to obtain an acetic acid product, the liquid-phase component returns to the carbonylation reaction kettle to continue to react, the acetic acid product rectified from the gas-phase rectifying tower enters a product rectifying tower to be further rectified, and the rectified product is extracted from the side line. The system further comprises an intelligent control module, a big data analysis module and a driving module. According to the intelligent reaction system disclosed by the invention, the iridium catalyst is well recycled, and the product is further purified, so that the quality of an acetic acid product is improved.

Description

technical field [0001] The invention relates to the field of acetic acid preparation, in particular to an intelligent reaction system and method for preparing acetic acid by carbonylation of methanol. Background technique [0002] Acetic acid is a very important chemical product. There are hundreds of products derived from it, which are widely used in medicine, pesticide, food and other related industries. At present, methanol carbonylation is the most widely used technical route for the production of acetic acid in industry. Industrial methanol carbonylation catalysts for acetic acid have gone through three stages: cobalt-based catalyst developed by BASF, rhodium-based catalyst developed by Monsanto, and iridium-based catalyst developed by BP. Among them, iridium-based catalyst has relatively cheap price and low water content. As well as the characteristics of high catalytic activity, it has become the mainstream catalyst for methanol carbonylation to produce acetic acid. ...

Claims

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Application Information

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IPC IPC(8): C07C51/12C07C51/43C07C51/44C07C53/08B01J31/24B01J31/18
CPCY02P20/584
Inventor 张志炳孟为民周政王宝荣杨高东罗华勋张锋李磊杨国强田洪舟曹宇胡兴邦
Owner NANJING YANCHANG REACTION TECH RES INST CO LTD
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