Technology for synthesizing acetic acid

An acetic acid and process technology, applied in the technical field of synthesizing acetic acid, can solve problems such as the discharge of aldehyde-containing toxic substances, limited water solubility of aldehydes, etc., and achieve the effects of avoiding pollution, realizing recycling, and avoiding environmental pollution.

Inactive Publication Date: 2019-01-18
JIANGSU SOPO CHEM +1
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  • Abstract
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Problems solved by technology

[0005] In the prior art, aldehyde wastewater is mostly used to react with other substances to generate stable usable substances in the method of aldehyde wastewater treatment. For example, the application number is 200810126702.9. In this invention, aldehyde-containing wastewater is used as absorption water and used for the preparation of bisglyphosate, so as to carry out environmental protection treatment of aldehyde-containing wastewater, but due to the limited water solubility of aldehydes, aldehydes are easy to volatilize from water, and it is very easy to cause aldehyde-containing toxic substances emissions

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  • Technology for synthesizing acetic acid
  • Technology for synthesizing acetic acid
  • Technology for synthesizing acetic acid

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Embodiment Construction

[0023] In order to deepen the understanding of the present invention, the present invention will be further described below in conjunction with the examples, which are only used to explain the present invention, and do not constitute a limitation to the protection scope of the present invention.

[0024] according to figure 1 Shown, the present embodiment proposes a kind of technique of synthesizing acetic acid, under the pressure of 2.3 ~ 3.5Mpa and the temperature of 180 ℃ ~ 200 ℃, methanol and CO in the rhodium catalyst, methyl iodide promoter and lithium iodide stabilizer Under the action, CO and methanol generate acetic acid in the reactor. The acetic acid and reaction liquid generated in the reaction kettle are reduced in temperature and pressure in the flash tank to a temperature of 135-150°C and a pressure of 0.05-0.2Mpa, and form a gas-liquid two-phase after flash evaporation. The liquid containing the rhodium catalyst is pumped back to the reaction kettle through th...

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Abstract

The invention provides a technology for synthesizing acetic acid. A production technology mainly comprises the following step: enabling CO and methanol to generate the acetic acid in a reaction kettleunder the conditions that the pressure is 2.3 to 3.5Mpa and the temperature is 180 to 200 DEG C and under the actions of a rhodium catalyst, an iodomethane accelerant and a lithium iodide stabilizingagent; meanwhile, uniformly recycling an iodine-containing substance in a production process; after oxidizing the iodine-containing substance to obtain the acetic acid, recycling, wherein the recycled catalyst and extraction agent can be repeatedly utilized. A whole process technology is advanced and has the advantages of sufficient energy utilization, less energy source consumption, low production cost, high production efficiency and less investment equipment; a zero-emission environment-friendly technology is realized.

Description

technical field [0001] The invention relates to the field of chemical synthesis, in particular to a process for synthesizing acetic acid. Background technique [0002] Acetic acid is a chemical raw material with a wide range of uses. Today, the main method of preparing acetic acid is the methanol carbonyl method. The production of acetic acid produced by this technology has reached more than 99% of the world's total acetic acid production. In the process of methanol carbonyl to prepare acetic acid, methanol and carbon monoxide are the main raw materials for the preparation of acetic acid, and rhodium / iridium-iodine is used as a catalyst for the production of acetic acid. Under a certain temperature and pressure, methanol and carbon monoxide can produce acetic acid through chemical reaction, and the finished product of acetic acid can be obtained through further flash separation process and rectification purification process. There are many chemical components in the methano...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C51/145C07C51/44C07C53/08
CPCC07C51/145C07C51/44C07C53/08Y02P20/584
Inventor 朱桂生王忠华胡宗贵赵禄强刘培军刘玲唐丽戴小卉
Owner JIANGSU SOPO CHEM
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