Process for processing and recovering acetone wastewater

A technology for acetone and waste water, applied in the chemical industry, can solve the problems of low acetone removal efficiency, high treatment cost, and secondary pollution, and achieve the effects of long life of the adsorbent, simple equipment, and high cost-efficiency ratio

Inactive Publication Date: 2008-07-16
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the air stripping process has irreparable defects: 1. The removal efficiency of acetone is low; 2. The acetone tail gas produced diffuses to the atmosphere, causing secondary pollution and waste of resources; 3. High processing costs

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0014] The concentration of acetone in wastewater is 3400ppm, the total amount of feed is 1372.4 grams, and the adsorption weight space velocity is 2.35w / w h -1 , the total adsorption time is 7 hours, the adsorption temperature is 10°C, and 12 grams of wastewater is treated per gram of molecular sieve. Desorb at a gas temperature of 100°C, and the desorption weight space velocity is 0.05w / w·h -1 , The desorption gas is helium, the tail gas is absorbed by water after desorption, and the recovery rate of acetone can reach 91%.

example 2

[0016] The concentration of acetone in wastewater is 3400ppm, the total amount of feed is 1523 grams, and the adsorption weight space velocity is 2.24w / w h -1 , the total adsorption time is 7 hours, the adsorption temperature is 40°C, and 22 grams of wastewater is treated per gram of molecular sieve. Desorption at a gas temperature of 150°C, the desorption weight space velocity is 0.15w / w h -1 , The desorption gas is air, the tail gas is absorbed by water after desorption, and the recovery rate of acetone can reach 97%.

example 3

[0018] Silicalite-1 molecular sieve is used as the adsorbent, the feed amount is 1535.8 grams, and the adsorption weight space velocity is 2.23w / w h -1 , the effective adsorption time can last for 8 hours, and 18.3 grams of wastewater can be treated per gram of molecular sieve; the adsorption temperature is 35 ° C, desorption at a gas temperature of 220 ° C, the desorption gas is nitrogen, and the desorption weight space velocity is 5.0 w / w h -1 After desorption, the acetone concentration in the desorption liquid reaches 9.57%, and the liquid recovery rate reaches 99.2%.

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Abstract

The invention relates to a method for separating absorption of a zeolite molecular sieve and recycling acetone in waste water. The prior treatment art has the defects of high cost, low acetone removing rate and secondary pollution to the environment. The invention is to pass the acetone waste water through an absorption column to make the absorption column to absorb the acetone in the waste water; the acetone content in water leakage is reduced to a degree which microorganism can bear when two levels of biochemistry processing are carried out or to reach an environmental protection emission requirement. The absorbed acetone can desorb under a gas desorption condition; the absorption agent is regenerated and the desorbed acetone can be recycled and utilized.

Description

technical field [0001] The invention belongs to the field of chemical industry, and relates to a method for absorbing, separating and recovering acetone from waste water containing acetone, in particular to a method for separating and recovering acetone by using zeolite molecular sieve as a solid adsorbent. Background technique [0002] Acetone is an important chemical raw material, but in the production process, it will inevitably produce ketone-containing wastewater. At present, the treatment method of acetone wastewater is to use the air stripping process to reduce the acetone content in the ketone-containing wastewater, so as to reduce it to the level that microorganisms can tolerate in the secondary biochemical treatment, or to meet the environmental protection discharge requirements. However, the air stripping process has irreparable defects: 1. The removal efficiency of acetone is low; 2. The generated acetone tail gas diffuses into the atmosphere, causing secondary p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/28C07C49/08C07C45/78B01J20/34
Inventor 孙尧俊吕新春王力平吴泰琉
Owner FUDAN UNIV
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