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Acetic acid production wastewater treatment process

A technology for the production of waste water and treatment process, which is applied in the direction of natural water treatment, water/sewage treatment, water/sewage multi-stage treatment, etc. It can solve the problems of high cost, inability to recycle acetaldehyde and iodine resources, etc., to improve production Efficiency, reduction of processing costs, and improvement of economic benefits

Active Publication Date: 2021-06-08
JIANGSU JITRI-TOPSOE JOINT RES & DEV CENT CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The object of the present invention is to provide a kind of solution that can solve the aforementioned problems in view of the high cost of the acetic acid production wastewater treatment process in the prior art described in the background technology, and the problem that acetaldehyde and iodine in the wastewater cannot be recycled and utilized Acetic acid production wastewater treatment process

Method used

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  • Acetic acid production wastewater treatment process

Examples

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Effect test

Embodiment 1

[0024] A kind of acetic acid production wastewater treatment process, it comprises the following steps:

[0025] S1 adds 30 wt% hydrogen peroxide aqueous solution to acetic acid production wastewater, wherein the molar equivalent ratio of hydrogen peroxide and iodine in wastewater is 1:1, hydrogen peroxide reacts with iodide ions in wastewater to generate iodine simple substance, and reacts in normal Under pressure, the reaction temperature is 15°C, and the reaction time is 60 minutes;

[0026] S2 filters the mixture that has been reacted in step S1, and separates the solid iodine elemental substance generated by the reaction from the waste water, and the remaining liquid is the liquid phase product 1;

[0027] S3 adds activated carbon powder in liquid phase product 1 after step S2 is processed, and the mass ratio of the activated carbon added and the residual iodine in liquid phase product 1 is 1:1000;

[0028] S4 filters the liquid phase product 1 after the treatment in ste...

Embodiment 2

[0031] A kind of acetic acid production wastewater treatment process, it comprises the following steps:

[0032] S1 Add 30 wt% hydrogen peroxide aqueous solution to acetic acid production wastewater, wherein the molar equivalent ratio of hydrogen peroxide to iodine in wastewater is 2:1, hydrogen peroxide reacts with iodide ions in wastewater to generate iodine element, the reaction is in normal Under pressure, the reaction temperature is 30°C, and the reaction time is 20 minutes;

[0033] S2 carries out gravity filtration or decompression filtration to the reaction mixture of step S1, and the solid iodine simple substance generated by the reaction is separated from the waste water, and the remaining liquid is liquid phase product 1;

[0034] S3 adds gac powder in the liquid phase product 1 after step S2 is processed, and the mass ratio of the gac added and the iodine remaining in the liquid phase product 1 is 1:500;

[0035] S4 performs gravity filtration or vacuum filtration...

Embodiment 3

[0038] A kind of acetic acid production wastewater treatment process, it comprises the following steps:

[0039] S1 adds 40 wt% hydrogen peroxide aqueous solution to the acetic acid production wastewater, wherein the molar equivalent ratio of hydrogen peroxide and iodine in the wastewater is 3:1, and hydrogen peroxide reacts with iodide ions in the wastewater to generate iodine element, which reacts in normal Under pressure, the reaction temperature is 60°C, and the reaction time is 5 minutes;

[0040] S2 filters the mixture that has been reacted in step S1, and separates the solid iodine elemental substance generated by the reaction from the waste water, and the remaining liquid is liquid phase product 1;

[0041] S3 adds activated carbon powder in the liquid phase product 1 after step S2 is processed, the mass ratio of the activated carbon added and the iodine remaining in the liquid phase product 1 is 1:100;

[0042] S4 filters the liquid phase product 1 treated in step S3...

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Abstract

The invention discloses an acetic acid production wastewater treatment process which comprises the following steps: adding a hydrogen peroxide aqueous solution into acetic acid production wastewater, and reacting hydrogen peroxide with iodide ions in the wastewater to generate elemental iodine; filtering out the solid iodine elementary substance generated by the reaction from the wastewater, wherein the residual liquid is a liquid-phase product 1; adding activated carbon powder into the treated liquid phase product 1; filtering the treated liquid phase product 1, and separating out activated carbon in the liquid phase product 1 so that residual liquid is a liquid phase product 2; and adding an aqueous hydrogen peroxide solution into the treated liquid-phase product 2, reacting hydrogen peroxide with acetaldehyde in the liquid-phase product 2 to generate acetic acid, converting the liquid into a liquid-phase product 3, and conveying the liquid-phase product 3 to an acetic acid production system to separate acetic acid. According to the acetic acid production wastewater treatment process, iodine in the wastewater can be converted into iodine simple substances to be recycled, acetaldehyde in the wastewater is converted into acetic acid, the yield of acetic acid is increased, and environmental pollution is avoided.

Description

technical field [0001] The invention belongs to the technical field of industrial waste water treatment and effective material recovery and reuse, in particular to a treatment process for acetic acid production waste water, especially a low-cost acetic acid production waste water treatment process for recycling iodine and acetaldehyde in the acetic acid production waste water. Background technique [0002] In the current acetic acid production process, methanol carbonylation is the main production process, and a large amount of hydroiodic acid is used in the production process. Because the methanol carbonylation reaction in the prior art is not easy to complete the reaction, and the homogeneous hydroiodic acid and acetic acid products are not easy to separate, after obtaining the crude product, it needs to go through many processes such as initial separation, catalyst removal, accelerator removal, and acetaldehyde enrichment. The crude product is refined in the first process...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04C01B7/14C07C51/285C07C53/08C02F103/36
CPCC02F9/00C01B7/14C07C51/285C02F2103/36C02F1/722C02F1/283C07C53/08
Inventor 赵铁均朱桂生袁鼎杰段红宇张敏志赵禄强邱海芳宗张璋靳阿祥徐晓亮
Owner JIANGSU JITRI-TOPSOE JOINT RES & DEV CENT CO LTD
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