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Enhanced reaction system and process for preparing acetic acid through methanol carbonylation

A technology of methanol carbonylation and carbonylation reaction, which is applied in the preparation of carboxylic acid by carbon monoxide reaction, chemical/physical/physicochemical fixed reactor, separation/purification of carboxylic acid compounds, etc., which can solve the problem that carbon monoxide and methanol cannot be fully mixed , system reaction efficiency reduction and other issues, to achieve the effect of saving production resources, reducing production costs and improving operating efficiency

Inactive Publication Date: 2020-07-03
NANJING YANCHANG REACTION TECH RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In view of this, the present invention provides an enhanced reaction system and process for preparing acetic acid by carbonylation of methanol, so as to solve the problem in the prior art that carbon monoxide and methanol cannot be fully mixed inside the carbonylation reactor, resulting in a decrease in system reaction efficiency

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  • Enhanced reaction system and process for preparing acetic acid through methanol carbonylation

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Experimental program
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Effect test

Embodiment 1

[0050] Fill a sufficient amount of methanol and a corresponding catalyst into the methanol storage tank 12, connect the carbon monoxide feed pipe 11 to a gas source containing 200L of carbon monoxide, start the system, set the system temperature to 170°C, and set the pressure to 2MPa. Methanol and the catalyst are transported to the interior of the reaction kettle 3, and at the same time, carbon monoxide is transported to the interior of the micro interface generator 2 through the carbon monoxide feed pipeline 11;

[0051] The micro-interface generator 2 breaks carbon monoxide into micro-bubbles of micron size, and releases the micro-bubbles into the reactor 3, so that the carbon monoxide fully contacts with methanol in the state of micro-bubbles, and the carbonylation reaction takes place.

[0052] The carbonylation reaction product is sent to the flash column 4 , the light component rectification column 51 and the heavy component rectification column 52 in sequence, and final...

Embodiment 2

[0054] Fill a sufficient amount of methanol and a corresponding proportion of catalyst into the methanol storage tank 12, connect the carbon monoxide feed pipe 11 to a gas source containing 200L of carbon monoxide, start the system, set the system temperature to 175°C, and set the pressure to 3MPa. Methanol and the catalyst are transported to the interior of the reaction kettle 3, and at the same time, carbon monoxide is transported to the interior of the micro interface generator 2 through the carbon monoxide feed pipeline 11;

[0055] The micro-interface generator 2 breaks carbon monoxide into micro-bubbles of micron size, and releases the micro-bubbles into the reactor 3, so that the carbon monoxide fully contacts with methanol in the state of micro-bubbles, and the carbonylation reaction takes place.

[0056] The carbonylation reaction product is sent to the flash column 4 , the light component rectification column 51 and the heavy component rectification column 52 in seque...

Embodiment 3

[0058] Fill a sufficient amount of methanol and a corresponding proportion of catalyst into the methanol storage tank 12, connect the carbon monoxide feed pipe 11 to a gas source containing 200L of carbon monoxide, start the system, set the system temperature to 180°C, and set the pressure to 4MPa. Methanol and the catalyst are transported to the interior of the reaction kettle 3, and at the same time, carbon monoxide is transported to the interior of the micro interface generator 2 through the carbon monoxide feed pipeline 11;

[0059] The micro-interface generator 2 breaks carbon monoxide into micro-bubbles of micron size, and releases the micro-bubbles into the reactor 3, so that the carbon monoxide fully contacts with methanol in the state of micro-bubbles, and the carbonylation reaction takes place.

[0060] The carbonylation reaction product is sent to the flash column 4 , the light component rectification column 51 and the heavy component rectification column 52 in seque...

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Abstract

The invention provides an enhanced reaction system and process for preparing acetic acid through methanol carbonylation, and belongs to the technical field of acetic acid preparation. The enhanced reaction system comprises: a feeding unit used for storing and conveying carbon monoxide and methanol; and a carbonylation reaction kettle internally provided with a micro-interface generator, connectedwith the feeding unit and used as a place for a carbonylation reaction, wherein the micro-interface generator is used for crushing carbon monoxide bubbles into micro-bubbles with the diameter of micron grade before the carbonylation reaction in order to increase the phase boundary mass transfer area between the carbon monoxide and the methanol in the carbonylation reaction process and enhance thecarbonylation reaction efficiency. According to the enhanced reaction system and process for preparing acetic acid through methanol carbonylation, the problem that in the prior art, carbon monoxide and methanol cannot be fully mixed in a carbonylation reaction kettle, and consequently the reaction efficiency of the system is reduced is solved.

Description

technical field [0001] The invention relates to the technical field of acetic acid preparation, in particular to an enhanced reaction system and process for preparing acetic acid by carbonylation of methanol. Background technique [0002] Acetic acid, also called acetic acid or glacial acetic acid, is an organic monobasic acid, which is the main component of vinegar. Pure anhydrous acetic acid (glacial acetic acid) is a colorless hygroscopic solid, which turns into colorless crystals after solidification. Its aqueous solution is weakly acidic and highly corrosive. The steam is irritating to the eyes and nose. [0003] Acetic acid can be used as acidity regulator, acidulant, pickling agent, flavor enhancer, spice, etc. It is also a good antimicrobial agent, mainly due to its ability to lower the pH below that required for optimal growth of microorganisms. Acetic acid is the earliest and most used sour agent in my country. It is mainly used in compound seasoning, wax prepara...

Claims

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Application Information

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IPC IPC(8): C07C53/08C07C51/12C07C51/42C07C51/44B01J19/00B01J4/00
CPCC07C51/12C07C51/42C07C51/44B01J19/24B01J19/0053B01J4/001C07C53/08B01J4/004B01J10/002
Inventor 张志炳周政张锋李磊孟为民王宝荣杨高东罗华勋杨国强田洪舟
Owner NANJING YANCHANG REACTION TECH RES INST CO LTD
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