Method for recovering organic solvent from maleic anhydride wastewater

A technology for organic solvents and wastewater, applied in chemical instruments and methods, water pollutants, extracted water/sewage treatment, etc., can solve the problems of difficult discharge standards, difficult treatment, and inapplicability, and improve biodegradability , Reduce solvent consumption and reduce cost

Inactive Publication Date: 2017-05-24
PEKING PUYUAN INST FOR ADVANCED MATERIALS & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This technology helps recycle valuable resources from menic acid compounds while minimizing their impact on environment or human health. It also makes it easier than traditional methods like burning them away after use without causing harmful side-effects.

Problems solved by technology

This patented technical problem addressed in this patent relates to improving the removal efficiency and quality of crude carboxymethanesulfonic esters (CMSAs) during manufacturing processes involving synthetic polymers like alifϊmate-, naphylenestyrene monomers, dicyclodesiloxanes, cyclohexadienones, styrenebutenics, hydroxypropyltriazoles, pyridines, quaternars, diaminoacides, triphenols, stannous chloride, chromatic acid, polytaphthaquinodium salt, trimellins, permaqueroidal acid, dioctachromatric acid, diacyl alcohol, formaldehydes, ethereuthenium dichloride hydrate, moldings containing these harmful metabolites, including succinate, citrapeptaleaceans, lignosulfancies, bacteriostats, volatile organic sulfur compound(VOS2), and metal ion contaminants.

Method used

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  • Method for recovering organic solvent from maleic anhydride wastewater
  • Method for recovering organic solvent from maleic anhydride wastewater
  • Method for recovering organic solvent from maleic anhydride wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] The present embodiment provides a kind of method that reclaims organic solvent from maleic anhydride wastewater, comprises the steps:

[0043] S1: Mix 100mL maleic anhydride wastewater and 100mL dichloromethane evenly, place them in a separatory funnel, and let stand for extraction;

[0044] S2: After the layers are clearly separated, the two phases are separated with a separatory funnel to obtain the extract and raffinate;

[0045] S3: nitrogen bubbling is performed on the extract to separate the extractant dichloromethane from the organic solvent, wherein the separated organic solvent includes organic substances that are difficult to biodegrade such as DIBE, DBP and the like;

[0046] S21: The raffinate is bubbled with nitrogen, and the extractant is removed from the raffinate to obtain residual waste water.

[0047] Effect determination: The extract and raffinate obtained in S2 were analyzed by GC-MS respectively, the specific results are as follows image 3 and ...

Embodiment 2

[0050] The present embodiment provides a kind of method that reclaims organic solvent from maleic anhydride wastewater, comprises the steps:

[0051] S1: Mix 100mL maleic anhydride wastewater and 100mL ethyl acetate evenly, place them in a separatory funnel, and let stand for extraction;

[0052] S2: After the layers are clearly separated, the two phases are separated with a separatory funnel to obtain the extract and raffinate;

[0053] S3: Nitrogen bubbling of the extract by rectification to separate the extractant ethyl acetate from the organic solvent, wherein the separated organic solvent includes organic substances that are difficult to biodegrade such as DIBE, DBP and the like;

[0054] S21: The raffinate is bubbled with nitrogen, and the extractant is removed from the raffinate to obtain residual waste water.

[0055] Effect measurement: The residual wastewater obtained in S21 and the raw material maleic anhydride wastewater in S1 were tested for COD respectively. It ...

Embodiment 3

[0057] The present embodiment provides a kind of method that reclaims organic solvent from maleic anhydride wastewater, comprises the steps:

[0058] S1: Mix 100mL maleic anhydride wastewater and 100mL chloroform evenly, place in a separatory funnel, and let stand for extraction;

[0059] S2: After the layers are clearly separated, the two phases are separated with a separatory funnel to obtain the extract and raffinate;

[0060] S3: Nitrogen bubbling of the extract by rectification to separate the extractant chloroform from the organic solvent, wherein the separated organic solvent includes organic substances that are difficult to biodegrade such as DIBE and DBP;

[0061] S21: The raffinate is bubbled with nitrogen, and the extractant is removed from the raffinate to obtain residual waste water.

[0062] Effect measurement: The residual wastewater obtained in S21 and the raw material maleic anhydride wastewater in S1 were tested for COD respectively. It was found that the CO...

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Abstract

The invention relates to a method for recovering an organic solvent from maleic anhydride wastewater. The method comprises the following steps: using an extracting agent to extract the maleic anhydride wastewater; separating extracted two phases to obtain an extracting liquid and a raffinate; separating the extracting liquid to obtain the extracting agent and the organic solvent; and separating the raffinate to obtain the extracting agent and residual wastewater. The provided method for recovering the organic solvent from the maleic anhydride wastewater recovers the organic solvent with high additional value, the consumption of the solvent used in the production of maleic anhydride is reduced, meanwhile, the substances of organic matters difficult to degrade in the wastewater, like dimethyl phthalate, diethyl phthalate, dibutyl phthalate (DBP), di-isobutyl hexahydrophthalate (DIBE) and dibutyl sebacate, are extracted, so that the biochemical degradation of the maleic anhydride wastewater is improved, the wastewater treatment cost is lowered, and the environmental pollution is reduced.

Description

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Claims

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Application Information

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Owner PEKING PUYUAN INST FOR ADVANCED MATERIALS & TECH
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