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CN1069262A Expired / Lapsed CN ⏱️ 0.0 years remaining

A new process for the production of acetic acid reaction system by methanol low-pressure liquid-phase carbonylation

Assignee: Southwest Research and Desigin Institute of Chemical Industry
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Filing: 1992-08-13
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Granted: —
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Expires: 2012-08-13
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Abstract

Abstract The invention provides a novel reaction system suitable for low-pressure liquid-phase carbonylation of methanol to synthesize acetic acid, which is characterized in that reaction liquid flowing out of a reactor flows through 1-2 converters, and active rhodium complex Rh in the reaction liquid 2 I 2 - Then converted into a stable rhodium complex which can bear external heating without precipitation and decomposition, and then the crude product is taken out by an evaporation method. Improves the prior flash evaporator for production to take out crude products. The process is suitable for reaction liquid with acetic acid as solvent, and can reduce the circulation amount of catalyst and cocatalyst, reduce loss, reduce the rigor of process control, and reduce corrosion of apparatus by reaction at low temperature.

Inventors

  • 👤 雍永祜
  • 👤 叶达恩

Bibliographic Details

Application Number —
Jurisdiction CN
Data Source google_patents
Last Synchronized 2026-11-08 19:05
CPC Classifications
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Claims Analysis

Total Claims: 6
Claim 1
Independent Claim 68 words
1, novel reaction system that is applicable to the synthetic system of low-pressure methanol liquid phase carbonyl acetic acid technology.This reactive system is by reactor, convertor and have the vaporizer of outer well heater and vaporizer Recycling Mother Solution equipment and corresponding pipeline, valve are formed.It is characterized in that raw material enters vaporizer by reactor again through convertor, outside replenishing, take out thick product under the heat.
Claim 2
Dependent Claim 68 words
1, novel reaction system that is applicable to the synthetic system of low-pressure methanol liquid phase carbonyl acetic acid technology.This reactive system is by reactor, convertor and have the vaporizer of outer well heater and vaporizer Recycling Mother Solution equipment and corresponding pipeline, valve are formed.It is characterized in that raw material enters vaporizer by reactor again through convertor, outside replenishing, take out thick product under the heat.
Claim 3
Dependent Claim 99 words
2, press claim 1 described reactive system, it is characterized in that must be with the Rh(CO that contains in the reaction solution in convertor) 2 I - 2 Complex compound is converted into and can bears outer heating evaporation and do not decompose sedimentary other rhodium carbonylcomplex. The mode that transforms: 1. adopt evaporation back mother liquor partly to loop back convertor and promote to transform. 2. loading catalyst promotes to transform in the employing convertor. 3. adopt Recycling Mother Solution and the loading catalyst method that develops simultaneously. 4. not adding any matter utilization reaction self transforms.
Claim 4
Dependent Claim 33 words
3, press claim 1 described reactive system, it is characterized in that evaporative process will be realized by the vaporizer of outside heat supply by hot face is arranged, evaporative medium temperature≤150 ℃.
Claim 5
Dependent Claim 29 words
4, press claim 1 described reactive system, it is characterized in that temperature of reaction can operate under 130 ℃~175 ℃ condition, to reduce the reactor material corrosion rate.
Claim 6
Dependent Claim 50 words
5, press described in the claim 2, the catalyzer that is seated in the convertor is the loaded catalyst that contains rhodium complex, and its carrier can be a gac, or carries the molecular sieve and the Al of carbon 2 O 3 , or high molecular functional type carrier.

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