A system and method for recovering acetic acid from acetic acid tail gas

By designing the acetic acid exhaust gas recovery system, the connecting structure of the separation tank and the recovery tank and the adsorption effect of the anion exchange resin are solved, and the problem of absorbent consumption in the acetic acid exhaust gas recovery is achieved, and the effect of reducing costs and resource waste is achieved.

CN118987927BActive Publication Date: 2025-03-28HUBEI QUANHONG CHEM EQUIP CO LTD
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Patent Information

Application Number
CN202411106578.5
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2024-08-13
Publication Date
2025-03-28
Estimated Expiration
2044-08-13

AI Technical Summary

Technical Problem

During the recovery of acetic acid exhaust gas, the neutralization reaction between the acidic substance and the absorbent causes the absorbent to be consumed, increasing the recovery cost and causing waste of resources.

Method used

A acetate exhaust gas recovery system was designed, using the connecting structure between the separation chamber and the recovery chamber to adsorb hydroxide ions through anion exchange resin to reduce the consumption of acidic substances, and to recover hydroxide ions through the circulation mechanism to reduce overall consumption.

Benefits of technology

It effectively reduces the consumption of hydroxide ions and dilute sulfuric acid during the acetic acid exhaust gas recovery process, reduces production costs and resource waste, and improves recycling efficiency.

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Abstract

The present application relates to the technical field of acetic acid tail gas recovery, and specifically discloses a system for recovering acetic acid from acetic acid tail gas and a recovery method thereof. The system for recovering acetic acid from acetic acid tail gas comprises an absorption tower, a reaction chamber, a separation chamber, a recovery chamber, a driving mechanism, a connecting mechanism, a separating mechanism, a pumping mechanism, a distilling mechanism, a regenerating mechanism and a circulating mechanism. When the driving mechanism is in motion, the separation chamber is driven to be connected with the reaction chamber and the recovery chamber in sequence, so that part of the solution in the reaction chamber enters the separation chamber, the hydroxide ions in the sodium hydroxide are adsorbed, and then enters the recovery chamber, the sodium acetate is converted into acetic acid, the sodium carbonate is converted into sodium sulfate and carbon dioxide, the distilling mechanism cooperates with the condensation, the carbon dioxide and methanol are converted into gaseous state and separated, and the acetic acid is condensed into liquid state, so as to realize the recycling of acetic acid, and this process realizes the adsorption of hydroxide ions, reduces the consumption of sodium hydroxide by dilute sulfuric acid, reduces the cost and reduces the waste of resources.
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