Method for adopting high-efficiency and low-loss solvent to carry out absorbing treatment on ethyl acetate

An ethyl acetate, low-loss technology, applied in gas treatment, separation methods, carboxylate preparation, etc., can solve the problems of ethyl acetate waste gas pollution, difficult treatment, strong toxicity, etc., to solve the problem of difficult waste gas treatment , Good recycling effect, high absorption efficiency

Active Publication Date: 2018-07-27
SOUTH CHINA UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In order to solve the problems of ethyl acetate waste gas such as high pollution, strong toxicity, and difficult treatment, as well as the shortcomings and deficiencies of exi

Method used

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  • Method for adopting high-efficiency and low-loss solvent to carry out absorbing treatment on ethyl acetate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A method of absorbing ethyl acetate using a high-efficiency and low-damage solvent in this embodiment, the flow chart of its absorption process is as follows figure 1 As shown, the process consists of absorption tower, heat exchanger I, heat exchanger II, regeneration tower I, regeneration tower II and pipe fittings. A pipe-trough distributor is arranged in the main body of the absorption tower, and liquid level gauges, temperature sensors and pressure sensors are arranged on the tower body along the height direction of the absorption tower. The specific absorption treatment steps are as follows:

[0029] Waste gas containing ethyl acetate (from the coating process of a factory in Ningbo City, Zhejiang Province containing ethyl acetate waste gas, the flow rate is 4000m 3 / h, the temperature is 35°C, the concentration of ethyl acetate is 500g / m 3 ) first enters the absorption tower from the gas feed port of the lower section of the absorption tower, and flows from botto...

Embodiment 2

[0031] A method of absorbing ethyl acetate using a high-efficiency and low-damage solvent in this embodiment, the flow chart of its absorption process is as follows figure 1 As shown, the specific absorption treatment steps are as follows:

[0032] Waste gas containing ethyl acetate (from the coating process of a factory in Ningbo City, Zhejiang Province containing ethyl acetate waste gas, the flow rate is 4000m 3 / h, the temperature is 35°C, the concentration of ethyl acetate is 500g / m 3 ) first enters the absorption tower from the gas feed port of the lower section of the absorption tower, and flows from bottom to top in the absorption tower. The packing layer height of the absorption tower is 5m, the tower height is 8m, and the tower diameter is 0.8m; at the same time, the N,N-dimethylacetamide absorbent with a flow rate of 250kg / h enters from the upper section of the absorption tower. , from top to bottom with the waste gas countercurrent contact in the absorption tower ...

Embodiment 3

[0034] A method of absorbing ethyl acetate using a high-efficiency and low-damage solvent in this embodiment, the flow chart of its absorption process is as follows figure 1 As shown, the specific absorption treatment steps are as follows:

[0035] Waste gas containing ethyl acetate (from the coating process of a factory in Ningbo City, Zhejiang Province containing ethyl acetate waste gas, the flow rate is 4000m 3 / h, the temperature is 35°C, the concentration of ethyl acetate is 500g / m 3 ) first enters the absorption tower from the gas feed port of the lower section of the absorption tower, and flows from bottom to top in the absorption tower. The packing layer height of the absorption tower is 5m, the tower height is 8m, and the tower diameter is 0.8m; meanwhile, the 1,4-butyrolactone absorbent with a flow rate of 250kg / h enters from the upper section of the absorption tower. From top to bottom, it contacts with the waste gas countercurrently in the absorption tower for ab...

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Abstract

The invention belongs to the technical field of waste gas treatment, and discloses a method for adopting a high-efficiency and low-loss solvent to carry out absorbing treatment on ethyl acetate. The method adopts at least one solvent from N-methyl pyrrolidone, N,N-dimethylacetamide, 1,4-butyrolactone, dioctyl phthalate and methyl nylon acid to carry out countercurrent contact absorption on waste gas containing ethyl acetate in an absorption tower, then an absorbent is subjected to secondary rectification regeneration, and an ethyl acetate product and a regenerative absorbent with high purity can be obtained. The method has a higher absorption efficiency on ethyl acetate, the absorption saturability is higher, the loss of the solvent is lower, and the key problems that the ethyl acetate waste gas is hard to treat, and the emission standard cannot be met are solved.

Description

technical field [0001] The invention belongs to the technical field of waste gas treatment, and in particular relates to a method for absorbing ethyl acetate by using a high-efficiency and low-loss solvent. Background technique [0002] Coating technology is an important processing technology to change and improve the surface properties of materials, and it is widely used in many industrial sectors such as special paper processing, printing, adhesives, and photosensitive industries. In recent years, with the continuous improvement of multi-functional coating machines, the coating process has developed rapidly. Not only has the application in traditional industries increased steadily, but it has also been used in many high-tech industries such as electronics industry, computer industry and other emerging industries. improve dramatically. The rapid development of coating technology has also brought new problems - a large amount of VOC (volatile organic gas) emissions, and the...

Claims

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Application Information

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IPC IPC(8): C07C69/14C07C67/58C07C67/54B01D53/18B01D53/14
CPCB01D53/1487B01D53/18B01D2258/02C07C67/54C07C67/58C07C69/14
Inventor 杨思宇张银双陈博坤
Owner SOUTH CHINA UNIV OF TECH
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