Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

A kind of treatment method of thioglycolic acid production wastewater

A technology for producing wastewater and thioglycolic acid, which is applied in natural water treatment, water/sewage treatment, water treatment parameter control, etc. It can solve problems such as inability to oxidize and degrade organic matter, difficulty in meeting discharge requirements, solid salt pollution, etc., and achieve recycling. , low processing cost, prolonging the service life

Active Publication Date: 2021-01-22
山东沾化金嘉利化工科技有限公司 +1
View PDF11 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the current treatment method of thioglycolic acid production wastewater, since the organic matter cannot be completely oxidized and degraded, the separated water often contains a certain amount of organic matter, which is difficult to meet the discharge requirements, and the separated solid salt is always doped with a certain amount of organic matter , resulting in contamination of the separated solid salt

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A kind of treatment method of thioglycolic acid production wastewater
  • A kind of treatment method of thioglycolic acid production wastewater
  • A kind of treatment method of thioglycolic acid production wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] (1) Take mercaptoacetic acid production wastewater (NaCl content 17.0wt.%, COD: 20000mg / L, pH value is 0.5) and join in the wastewater storage tank, add catalytic oxidation auxiliary agent anhydrous manganese chloride and stir evenly, in the organic wastewater mn 2+ The molar concentration is 0.5mmol / L;

[0036] (2) Preheat to 200°C, enter the porous solid catalyst Nd 2 o 5 / SiO 2 React with oxygen in the bubbling reactor; control the reaction temperature to 200°C, the reaction pressure to 12.0MPa, the residence time to 60min, and the flow rate of waste water to 16.7ml / min;

[0037] (3) Sampling and analysis at the outlet of the bubbling reactor, then enter the flashing device, cool down, and centrifuge the solid salt NaCl through the desalting filter, return the concentrated solution after centrifugation to the filtering device, then enter the preheating device, and apply it to In the process, the recycling of catalytic oxidation aids is realized.

[0038] After t...

Embodiment 2

[0040] (1) Take thioglycolic acid production wastewater (NaCl content 17.0wt.%, COD: 15000mg / L, pH value is 5.0) and join in the wastewater storage tank, add catalytic oxidation auxiliary agent anhydrous manganese chloride and stir evenly, in the organic wastewater mn 2+ The molar concentration is 0.5mmol / L;

[0041] (2) Preheat to 250°C, enter the porous solid catalyst Nd 2 o 5 / SiO 2 React with oxygen in the bubbling reactor; control the reaction temperature to 250°C, the reaction pressure to 15.0MPa, the residence time to 10min, and the flow rate of waste water to 100ml / min;

[0042] (3) Sampling and analysis at the outlet of the bubbling reactor, then enter the flashing device, cool down, and centrifuge the solid salt NaCl through the desalting filter, return the concentrated solution after centrifugation to the filtering device, then enter the preheating device, and apply it to In the process, the recycling of catalytic oxidation aids is realized.

[0043] After test...

Embodiment 3

[0045] (1) Take thioglycolic acid production wastewater (NaCl content 22.0wt.%, COD: 20000mg / L, pH value is 3.0) and join in the wastewater storage tank, add catalytic oxidation auxiliary agent anhydrous manganese chloride and stir evenly, in the organic wastewater mn 2+ The molar concentration is 0.5mmol / L;

[0046] (2) Preheat to 300°C, enter the porous solid catalyst Nd 2 o 5 / SiO 2 React with oxygen in the bubbling reactor; control the reaction temperature to 300°C, the reaction pressure to 20.0MPa, the residence time to 5min, and the flow rate of waste water to 200ml / min;

[0047] (3) Sampling and analysis at the outlet of the bubbling reactor, then enter the flashing device, cool down, and centrifuge the solid salt NaCl through the desalting filter, return the concentrated solution after centrifugation to the filtering device, then enter the preheating device, and apply it to In the process, the recycling of catalytic oxidation aids is realized.

[0048] After testi...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
porosityaaaaaaaaaa
recovery rateaaaaaaaaaa
clearance rateaaaaaaaaaa
Login to View More

Abstract

The invention belongs to the technical field of organic wastewater treatment, and specifically relates to a treatment method of mercaptoacetic acid production wastewater. The treatment method comprises the following steps: mixing a catalytic oxidation assistant in the mercaptoacetic acid production wastewater in advance, preheating and entering a bubbling reactor, carrying out oxidation reaction with an oxidant, thus oxidizing organic matters in the mercaptoacetic acid production wastewater into H2O, CO2 and SO4<2->; carrying out flashing and evaporation concentration on a reaction solution after reaction, and desalting. According to the treatment method disclosed by the invention, soluble manganese salt can be combined with a porous solid catalyst Nd2O5 / SiO2, and a synergistic effect between the soluble manganese salt and the porous solid catalyst Nd2O5 / SiO2 is fully exerted, so that the organic matters in the mercaptoacetic acid production wastewater can be quickly and deeply oxidized and removed; the content of COD (Chemical Oxygen Demand) in the mercaptoacetic acid production wastewater can be greatly reduced, the water and solid salt can be effectively separated, the content of the organic matters in the water and the solid salt is low, separated water can be recycled, and the solid salt can also be used as a byproduct.

Description

technical field [0001] The invention belongs to the technical field of organic wastewater treatment, and in particular relates to a treatment method for thioglycolic acid production wastewater. Background technique [0002] Thioglycolic acid contains both mercapto and carboxyl groups, which makes thioglycolic acid more active and has a wide range of uses. Industrial mercaptoacetic acid is mainly produced by reacting sulfur-containing nucleophiles with chloroacetate. According to different nucleophiles, it can be divided into thiourea method, sodium hydrogensulfide method, sodium thiosulfate method, sodium polysulfide method, Sodium trithiocarbonate method, alkyl sulfonate method, etc. At present, the sodium hydrosulfide method is commonly used. The salt contained in the wastewater produced by the sodium hydrosulfide method is mainly sodium chloride, and the content is relatively high, generally about 20wt.%. It also contains organic substances such as thioglycolic acid and ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/10C02F101/30C02F103/36
CPCC02F1/001C02F1/04C02F1/725C02F1/74C02F9/00C02F2101/30C02F2103/36C02F2209/08
Inventor 王景华张广俊崔洪友杨明刚刘勤学张远王勇
Owner 山东沾化金嘉利化工科技有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com