Unlock instant, AI-driven research and patent intelligence for your innovation.

A kind of treatment method of t-acid industrial waste water

A technology for industrial waste water and treatment methods, applied in water/sewage treatment, extracted water/sewage treatment, water/sludge/sewage treatment, etc., can solve problems such as oil-water separation difficulties, emulsification, etc., and achieve the effect of resource utilization

Inactive Publication Date: 2019-12-27
NANJING NORMAL UNIVERSITY +1
View PDF4 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Usually choose tertiary amines (such as trioctylamine, tridecylamine, N235, etc.) Phenomena that are difficult to separate

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] To 500mL raw wastewater (COD is 51000mg·L -1 ;T acid content is 10.07g L -1 ), adding 400mL of benzene and amino ether volume ratio is 1:3 extractant, after extraction and separation, add 25.0mL of 20% ammonia solution to the organic phase, so that T acid is transferred to the back extraction solution in the form of ions; Add 4.5mL of concentrated sulfuric acid to the extract for acidification, so that the T acid product is precipitated and separated by filtration. The COD of wastewater treated by the above process is 750mg·L -1 , and its removal rate is 98.53%. The recovery amount of T acid is 4.34g, and its recovery rate is 86.20%.

Embodiment 2

[0024] To 500mL raw wastewater (COD is 51000mg·L -1 ;T acid content is 10.07g L -1 ), add 300mL of toluene and amine ether volume ratio as the extraction agent of 1:3, after extraction and separation, add 20.0mL of 25% ammonia solution to the organic phase, so that T acid is transferred to the back extraction solution in the form of ions; Add 4.5mL of concentrated sulfuric acid to the extract for acidification, so that the T acid product is precipitated and separated by filtration. The COD of wastewater treated by the above process is 844mg L -1 , and its removal rate is 98.35%. The recovery amount of T acid is 4.32g, and its recovery rate is 85.80%.

Embodiment 3

[0026] To 500mL raw wastewater (COD is 51000mg·L -1 ;T acid content is 10.07g L -1 ), add 250mL of n-octanol and amino ether volume ratio of 1:2 extractant, after extraction and separation, add 20% sodium hydroxide solution 35.0mL to the organic phase, so that T acid is transferred to the back extraction solution in the form of ions Add 4.5mL of concentrated sulfuric acid to the stripping solution for acidification, so that the T acid product is precipitated and separated by filtration. The COD of wastewater treated by the above process is 896mg L -1 , and its removal rate is 98.24%. The recovery amount of T acid is 4.30g, and its recovery rate is 85.36%.

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

No PUM Login to View More

Abstract

The invention provides a treatment method of T acid industrial wastewater, comprising the following steps: (1) adding an extraction agent composed of a thinner and a complexing agent 2,6-diethylanilino-N-ethylpropyl ether into the T acid industrial wastewater for performing extraction, and performing oil and water separation; (2) adding a stripping agent inorganic base solution into the organic phase after extraction in the step (1), thus diverting the T acid in the organic phase in an ionic form to the strip liquor, simultaneously regenerating the extraction agent; (3) adding an inorganic acid solution into the stripping water phase in the step (2) to perform acidizing treatment, thus separating out the T acid; and (4) filtering the separated solid to obtain a T acid product. Compared with the prior art, the extraction agent used in the invention has high efficiency and high selectivity and can be cyclically used after stripping treatment; and after the T acid industrial wastewater is treated by the method, the COD removal rate is higher than 98%, and the T acid product recovery rate is higher than 85%.

Description

technical field [0001] The invention discloses a treatment method for T-acid industrial wastewater, which belongs to the technical field of T-acid industrial wastewater treatment. Background technique [0002] T acid industrial wastewater mainly comes from the acid analysis and filtration section of the product production process, and its main components are water-soluble naphthalene sulfonic acid organic compounds and a small amount of inorganic acids and their salts. Because of the characteristics of high concentration, high acidity, high salinity and high chroma, the wastewater is difficult to treat. Aiming at the treatment of T-acid industrial wastewater, many scientific researchers have carried out a lot of research work on it. For example, Dong Zibin et al. applied for a patent "a comprehensive treatment method for T-acid separation mother liquor wastewater" (201510774504.3), through the treatment of T-acid production wastewater After separation and pH adjustment, sel...

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): C02F1/26C02F1/00C07C303/44C07C309/47C02F101/38
CPCC02F1/001C02F1/26C02F2101/38C02F2101/40C07C303/44C07C309/47
Inventor 崔世海杨静张大鹏
Owner NANJING NORMAL UNIVERSITY