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

Double function resin process for treating toluidine-containing effluent

A dual-functional resin and toluidine technology, applied in the field of toluidine-containing wastewater treatment, can solve the problems of low adsorption capacity, poor adsorption selectivity, high regeneration cost, etc., achieve high adsorption removal rate, high treatment efficiency, and realize the effect of recovery

Active Publication Date: 2008-02-13
NANJING UNIV +1
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although conventional adsorbents such as activated carbon have a large amount of adsorption to toluidine compounds, they need to be regenerated with hot steam, resulting in high regeneration costs, and the production and adsorption performance of activated carbon after regeneration are reduced; bentonite, rectorite and molecular sieve p-toluidine The relatively low adsorption capacity also limits its application in toluidine wastewater treatment; although the traditional macroporous adsorption resin has a large adsorption capacity, its adsorption selectivity is poor, and the toluidine compound adsorbed on the resin is easily oxidized and deteriorated , resulting in the difficult recovery of the adsorbed toluidine compound or the low purity of the recovered toluidine compound

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 Construction

[0011] Pass toluidine-containing wastewater through ultra-high cross-linked weak base anion exchange resin (bifunctional resin) or macroporous adsorption resin filled with adsorption and ion exchange functions at a temperature of 0-40°C and a flow rate of 0.5-8BV / h After the resin in the processing device is adsorbed and saturated, use 1-5% dilute sulfuric acid or 1-10% dilute hydrochloric acid as a desorbent to regenerate the resin. The desorbent flow rate is 0.2-3BV / h, and the regenerated high concentration The toluidine solution reclaims the toluidine product, and the low-concentration toluidine solution is used to prepare the next batch of desorbent for recycling.

[0012] The high-concentration desorption liquid uses 5-40% sodium hydroxide solution or 10-30% ammonia water to adjust the pH value to 7-11, and the obtained crude toluidine is subjected to a rectification process to obtain a toluidine product.

[0013] Example 1, 2, 3 adopt the ultrahigh cross-linked weak base...

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
specific surface areaaaaaaaaaaa
Login to View More

Abstract

The present invention relates to the treating process of effluent containing toluidine. In the conditions of 0-40 deg.c temperature and 0.5-8 BV / hr flow rate, effluent containing toluidine is made to pass through treater filled with double function resin of R-NH2, where R is divinyl benzene cross-linked styrene copolymer, and the resin has specific surface area not smaller than 700 sq m / g and exchange capacity not smaller than 0.5 mmol / g. The adsorption saturated double function resin is desorbed with dilute hydrochloric acid solution to regenerate, and the desorbed high concentration toluidine solution is treated through alkali regulation, rectification and other steps to recover toluidine product. The present invention has toluidine recovering rate higher than 80 % and recovered toluidine purity higher than 99 %. The present invention realizes the recovery of toluidine in effluent and the treating process is simple, efficient and economic.

Description

1. Technical field [0001] The invention relates to a treatment method for toluidine-containing wastewater, in particular to a method for treating toluidine-containing wastewater by using a bifunctional resin. 2. Background technology [0002] Toluidine-containing wastewater generally has high pollutant concentration and high toxicity, which is very serious to environmental pollution and has always attracted widespread attention in the industry. At present, the research methods for the treatment of toluidine wastewater mainly include catalytic oxidation and adsorption. Catalytic oxidation can reduce the concentration of toluidine in wastewater, but there are disadvantages such as low efficiency and high treatment cost, which limit the practical application and promotion of the technology. Adsorption treatment of toluidine-containing wastewater makes resource recovery possible because it does not destroy toluidine compounds in the water. Although conventional adsorbents such ...

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): C02F9/08C02F9/04C02F1/28B01J20/26B01D15/04
Inventor 李爱民朱兆连鲁俊东刘福强王津南龙超费正皓魏瑞霞陈金龙张全兴
Owner NANJING UNIV
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