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Technique for reclaiming ethylene alkali-washing waste liquid

A treatment process, ethylene alkali technology, applied in water/sewage treatment, natural water body treatment, water/sludge/sewage treatment, etc., can solve the problems of complex process, large equipment investment, high treatment cost, etc., and achieve simple process, The effect of reducing operating costs and high economic benefits

Inactive Publication Date: 2007-11-14
HEBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

According to the oxidant used and the treatment process, it can be divided into air oxidation method, wet air oxidation method, chlorine gas oxidation method and supercritical oxidation method. Disadvantages such as high cost and large equipment investment are difficult to be accepted by manufacturers

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Add the configured 10% Al(NO 3 ) 3 25ml of aqueous solution, then put 20g of macroporous anion exchange resin 201×7 into the solution, soak for 4 hours at room temperature, take it out, drain the aqueous solution, and obtain the loaded solid flocculant O 1 .

Embodiment 2

[0036] Add the configured 10% Mg(NO 3 ) 2 Add 25ml of aqueous solution, then put 20g of macroporous anion exchange resin 201×4 into the solution, soak for 4 hours at room temperature, take it out, drain the aqueous solution, and obtain the loaded solid flocculant O 2 .

Embodiment 3

[0038] Add the prepared 10% MgSO to the 100ml beaker 425ml of aqueous solution, then put 20g of macroporous anion exchange resin D301 into the solution, soak at room temperature for 4 hours, take it out, drain the aqueous solution, and obtain the loaded solid flocculant O 3 .

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PUM

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Abstract

The invention relates to a process of reactivating the ethane alkali washing liquid, comprising the following operating steps: deoiling, causticizing and desulfurizing the alkali waste liquid, adding loading flocculating agent and metallic oxide during the above steps. The invention is characterized by the simple process, sound deoiling effect and complete meeting the ethane alkali washing process demand of the regenerated alkali liquid. The side product got in the course of causticizing and desulfurizing, by transforming the S2- into sulfide of high added value by applying sulfide conversion method, can be sale as commercial articles, which simplifies the waste alkali liquid treating course and brings higher economic benefit for the waste alkali liquid treating.

Description

technical field [0001] The invention belongs to the field of light industry and chemical waste liquid treatment, in particular to a regeneration treatment process for ethylene alkali washing waste liquid. Background technique [0002] In the process of ethylene production, cracked gas needs to be washed with high concentration NaOH solution to remove CO 2 、H 2 S and other acid gases. The remaining NaOH solution in the alkaline cleaning process is discharged as a waste liquid. In addition to the remaining NaOH, this type of alkaline cleaning waste liquid also contains NaOH generated during the alkaline cleaning process. 2 CO 3 、Na 2 Inorganic salts such as S and a small amount of organic substances such as sodium salts of mercaptans, thioethers, phenols and naphthenic acids, and neutral oils. The treatment of this kind of alkali washing waste liquid has always been a difficult problem in the production process of ethylene. [0003] Na in alkaline washing waste liquid 2...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/52C02F1/42C02F1/38C02F1/58C02F103/34
Inventor 侯凯湖杨红健王兰芝刘会丰
Owner HEBEI UNIV OF TECH
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