Method for treating waste water from acetic acid mercapto- isooctyl ester

A technology of isooctyl thioglycolate and isooctyl acetate, which is applied in the field of wastewater treatment of isooctyl thioglycolate production, can solve the problems of difficult treatment, air pollution, and no patent reports, etc., and achieve simple process and effective treatment Obvious and easy to promote effect

Active Publication Date: 2008-12-10
湖北犇星新材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The concentration of hydrogen ions in wastewater is as high as 2.5moL / L, the solid content of salts is as high as 200g / L, and the chemical oxygen demand (COD) is as high as 15000mg / L, making it extremely difficult to treat
[0003] Document " Fenton reagent oxidation treatment isooctyl thioglycolate production waste water " (fine petrochemical industry, May, 2005, author Ni Shengliang, Xia Ping), has reported a kind of wastewater treatment method of isooctyl thioglycolate, and this method mainly exists energy Defects that are expensive, time-consuming and require high equipment
[0004] Document " isooctyl thioglycolate production waste water pretreatment test " (inner Mongolia petrochemical industry, May, 2004, author Ni Shengliang, Shen Yaying etc.), has also reported a kind of wastewater treatment method of isooctyl thioglycolate, and this method mainly has pollution Air, and the stench is heavy, and the water still contains reducing substances, which will affect the subsequent biochemical treatment and other defects
[0005] At present, the method for treating isooctyl thioglycolate production wastewater has not yet been patented.

Method used

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  • Method for treating waste water from acetic acid mercapto- isooctyl ester

Examples

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example 1

[0013] Example 1: Take 1L of esterification wastewater, the main pollutants are sodium sulfate, sodium carbonate and organic matter, the pH value of the wastewater is 7-8, the COD is 11250mg / L, and the solid content is 25g / L. Put the waste water in the separatory funnel, after standing still for 24-48 hours, the waste water is divided into two layers, the upper layer is the organic layer, and the lower layer is the waste water layer, recover the upper organic layer, and collect the lower waste water. According to 1% of the weight of wastewater collected in the lower layer, input H 2 o 2 Carry out oxidation treatment for 2 hours, then perform air flotation purification on the oxidized wastewater, and then put the wastewater after air flotation purification into powdered activated carbon according to 1% of the wastewater weight, mix and stir for 30 minutes, and then filter through plate and frame Machine filtration for decolorization and adsorption, after which the wastewater i...

example 2

[0014] Example 2: Take 1L of thiolated waste water, the main pollutants are sodium chloride, sodium sulfate, hydrochloric acid, organic matter, the pH value of the waste water is 1~2, and the COD is 16000mg / L, [CL - ]=45.2g / L, solid content 286g / L. Put the waste water in the separatory funnel, after standing still for 24-48 hours, the waste water is divided into two layers, the upper layer is the organic layer, and the lower layer is the waste water layer, recover the upper organic layer, and collect the lower waste water. Put the collected wastewater from the lower layer into quicklime and stir it for neutralization treatment until the pH value of the wastewater reaches 7-8, then let it stand for 6 hours, collect the wastewater from the upper layer, and add H 2 o 2 Carry out oxidation treatment for 2 hours, then perform air flotation purification on the oxidized wastewater, and then put the wastewater after air flotation purification into powdered activated carbon according ...

example 3

[0015] Example 3: Take 1L of reduced waste water, the main pollutants are zinc chloride, hydrochloric acid, sodium chloride, sodium carbonate and organic matter, the pH value of the waste water is 1~2, and the COD is 16250mg / L, [CL - ]=28.2g / L, solid content 180g / L. Put the waste water in the separatory funnel, after standing still for 24-48 hours, the waste water is divided into two layers, the upper layer is the organic layer, and the lower layer is the waste water layer, recover the upper organic layer, and collect the lower waste water. Put the collected wastewater from the lower layer into liquid ammonia and stir it for neutralization treatment until the pH value of the wastewater reaches 7-8, then let it stand for 6 hours, collect the wastewater from the upper layer, and add H 2 o 2 Carry out oxidation treatment for 2 hours, then perform air flotation purification on the oxidized wastewater, and then put the waste water after air flotation purification into powdered act...

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Abstract

The invention relates to a method for treating wastewater in iso-octyl thioglycolate production. The method comprises the following specific steps that: when wastewater is treated, firstly, a part of organisms in the wastewater are reclaimed by adopting a self-extraction method; if the wastewater is acidic, the wastewater needs to be neutralized; secondly, a part of COD and solid suspended substances in the wastewater are respectively removed by a method of oxydol oxidation and air flotation purification; the wastewater is absorbed and discolored by active carbon to further remove COD in the wastewater; inorganic salt is removed by a distillation method; and finally the wastewater reaches the national emission standard. The method has obvious treatment effect, makes esterified wastewater, sulfhydrylated wastewater and deoxidized wastewater in iso-octyl thioglycolate production reach the national emission standard and has the effects of simple process and convenient popularization.

Description

technical field [0001] The invention relates to the field of wastewater treatment, in particular to a method for treating wastewater produced from isooctyl thioglycolate. Background technique [0002] The composition of waste water produced during the production of isooctyl thioglycolate by the Butte method is complex. The waste water contains not only alcohols, acids, esters, but also acids and salts. The concentration of hydrogen ions in wastewater is as high as 2.5moL / L, the solid content of salts is as high as 200g / L, and the chemical oxygen demand (COD) is as high as 15000mg / L, making it extremely difficult to treat. [0003] Document " Fenton reagent oxidation treatment isooctyl thioglycolate production waste water " (fine petrochemical industry, May, 2005, author Ni Shengliang, Xia Ping), has reported a kind of wastewater treatment method of isooctyl thioglycolate, and this method mainly exists energy The defects of high consumption, time-consuming and high equipment...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/10C02F1/72C02F1/04C02F1/26C02F1/66C02F1/24C02F1/28C02F103/36
Inventor 戴百雄吴勇宫廷徐善武王少培蒋俊刘勇温志鹏张建广
Owner 湖北犇星新材料股份有限公司
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