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Treatment method of aminoethyl sulfide production wastewater

A technology for the production of aminoethyl sulfide and wastewater, which is applied in natural water treatment, water/sewage treatment, water/sewage multi-stage treatment, etc. It can solve the problems of cumbersome operation, high energy consumption, and high treatment cost, and achieve simplified treatment The effect of advanced technology, reduced energy consumption, and simple process operation

Active Publication Date: 2022-04-26
HEBEI HAILI FRAGRANCES CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problems of cumbersome operation, high energy consumption and high treatment cost in the existing method for treating wastewater produced by aminoethyl sulfide, the present invention provides a method for treating wastewater produced by aminoethyl sulfide, which mainly selects solid Carrying ruthenium chloride is used as a catalyst to catalyze the oxidation of salty wastewater, and then through distillation dehydration and centrifugal desalination to obtain wastewater that meets discharge standards and sodium chloride that meets industrial regeneration salt standards, which has high economic and environmental benefits

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] In this example, the pH of aminoethyl sulfide production wastewater is 12.7, the water content is 81.9%, the salt content is 16.2%, the sodium hydroxide content is 1.1%, the other substance content is 0.8%, and the COD is 13150mg / L.

[0041] The present embodiment provides a method for treating waste water produced by aminoethyl sulfide, comprising the steps of:

[0042] Step a, prepare ruthenium-containing immobilized catalyst:

[0043] Take 1 g of ruthenium chloride, add 40 g of 1% dilute hydrochloric acid and stir to dissolve, then add 15 g of 800 mesh silicon carbide powder, stir and mix for 1 h, add 28 wt % ammonia water to adjust the pH to 9.7, stir at room temperature for 1 h, filter, and bake at 105 ° C Dry, and then calcined at 1100°C for 3 hours to obtain 15.6 g of ruthenium-containing solid-supported catalyst;

[0044] Step b, add 30wt% hydrochloric acid solution to 1000mL aminoethyl sulfide production wastewater to adjust the pH to 1.5, then raise the tempe...

Embodiment 2

[0047] In this example, the pH of aminoethyl sulfide production wastewater is 12.7, the water content is 81.9%, the salt content is 16.2%, the sodium hydroxide content is 1.1%, the other substance content is 0.8%, and the COD is 13150mg / L.

[0048] The present embodiment provides a method for treating waste water produced by aminoethyl sulfide, comprising the steps of:

[0049] Step a, prepare ruthenium-containing immobilized catalyst:

[0050] Take 1 g of ruthenium chloride, add 30 g of 1% dilute hydrochloric acid and stir to dissolve, then add 20 g of 800 mesh silicon carbide powder, stir and mix for 1 h, add 28 wt % ammonia water to adjust the pH to 9.5, stir at room temperature for 1 h, filter, and bake at 105 ° C Dry, then calcined at 1150°C for 2 hours to obtain 20.7g of ruthenium-containing solid-supported catalyst;

[0051] Step b, add 30wt% hydrochloric acid solution to 1000mL of aminoethyl sulfide production wastewater to adjust the pH to 2.7, then raise the tempera...

Embodiment 3

[0054] In this example, the pH of aminoethyl sulfide production wastewater was tested to be 12.5, the water content was 82%, the salt content was 16.14%, the sodium hydroxide content was 1.1%, the other substance content was 0.76%, and the COD was 12170 mg / L.

[0055] The treatment method of aminoethyl sulfide production waste water in the present embodiment comprises the steps:

[0056] Step a, prepare ruthenium-containing immobilized catalyst:

[0057] Take 1 g of ruthenium chloride, add 50 g of 1% dilute hydrochloric acid and stir to dissolve, then add 10 g of 800 mesh silicon carbide powder, stir and mix for 1 h, add 28 wt % ammonia water to adjust the pH to 9.2, stir at room temperature for 1 h, filter, and bake at 105 ° C Dry, and then calcined at 1200°C for 1 h to obtain 10.5 g of ruthenium-containing solid-supported catalyst;

[0058] Step b, add 30wt% hydrochloric acid solution to 1000mL of aminoethyl sulfide production wastewater to adjust the pH to 2.1, then raise ...

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Abstract

The invention relates to the technical field of industrial wastewater treatment, and particularly discloses a treatment method of aminoethyl sulfide production wastewater. According to the treatment method of the aminoethyl sulfide production wastewater provided by the invention, the ruthenium-containing compound is immobilized on the silicon carbide powder to serve as the catalyst, so that the poisoning resistance of the catalyst can be effectively improved, the oxidation effect of the oxidant on the wastewater can be improved, and organic matters in the wastewater are fully oxidized into carbon dioxide and water, therefore, the treatment method has the advantages of simple operation and low cost. The method can effectively avoid the influence of organic matters on the quality of sodium chloride in the distillation process, and does not need a high-temperature melting process, so that the generation of toxic substance dioxin in the high-temperature melting process is avoided, the treatment process is effectively simplified, the energy consumption is reduced, the organic matter TOC in the sodium chloride by-product obtained after distillation is less than or equal to 50mg / kg, and the quality requirement of industrial regenerated salt is met. Therefore, the problem of retreatment of the sodium chloride by-product is solved, and the method has higher economic effect and environmental protection benefit and higher practical value.

Description

technical field [0001] The invention relates to the technical field of industrial wastewater treatment, in particular to a treatment method for aminoethyl sulfide production wastewater. Background technique [0002] Aminoethyl sulfide, chemical name 2-[[[5-(dimethylamino)methyl-2-furyl]methyl]thio]ethylamine, is an important pharmaceutical intermediate, mainly used for synthesis The intermediate of gastric medicine ranitidine hydrochloride. The production of 1 ton of aminoethyl sulfide will produce 6-7 tons of sodium chloride-containing wastewater, and the salt-containing wastewater can be distilled and concentrated to obtain sodium chloride, but the obtained sodium chloride contains more organic pollutants. Mainly unreacted raw materials and by-products in the reaction process, unreacted reaction raw materials include dimethylamine, formaldehyde, furfuryl alcohol, cysteamine, and other organic substances are mainly 2-[[[5-(dimethylamino)methyl -2-furyl]methyl]thio]ethylam...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/10B01J27/224C01D3/04C02F103/36C02F1/72C02F1/78C02F1/38C02F1/04C02F1/66
CPCC02F9/00B01J27/224C01D3/04C02F1/725C02F1/722C02F1/78C02F1/38C02F1/04C02F1/66C02F2103/36
Inventor 邵帅张云堂刘铁成张健王飞扬张玉芬
Owner HEBEI HAILI FRAGRANCES CO LTD
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