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Device and method for processing sodium p-toluenesulfonate waste liquor

A technology of sodium p-toluenesulfonate and waste liquid, used in water/sludge/sewage treatment, water pollutants, dispersed particle separation, etc., can solve the problems of easy oxidation, corrosion resistance, etc. Longevity, the effect of reducing polarization

Active Publication Date: 2014-05-14
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing electrodialysis technology mostly uses traditional metal electrodes, such as titanium ruthenium-plated electrodes, etc., which have the disadvantages of being easily oxidized, corroded and having high resistance during use.

Method used

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  • Device and method for processing sodium p-toluenesulfonate waste liquor
  • Device and method for processing sodium p-toluenesulfonate waste liquor
  • Device and method for processing sodium p-toluenesulfonate waste liquor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0063] Filter the paint waste liquid containing sodium p-toluenesulfonate through a microporous membrane to remove suspended matter in the waste liquid. Acid chamber / salt chamber / alkali chamber (three-chamber) membrane unit composed of anion membrane-cation membrane-bipolar membrane, the salt chamber is not filled with ion exchange resin, and the alkali chamber is filled with quaternary ammonium-OH type anion exchange resin (201× 7 Strongly basic styrene-based heterogeneous anion exchange resin), the acid chamber is filled with sulfonic acid H-type cation-exchange resin (001×7 strongly acidic styrene-based heterogeneous cation-exchange resin). The initial influent of the salt chamber is the filtered sodium p-toluenesulfonate waste liquid with a concentration of 17g / L. In order to ensure a certain conductivity, the initial water intake of the alkali chamber is a sodium hydroxide solution with a pH of 8, the acid chamber is a p-toluenesulfonic acid solution with a pH of 5, and t...

Embodiment 2

[0065] The acid chamber / salt chamber / alkali chamber (three-chamber) membrane unit composed of anion membrane-cation membrane-bipolar membrane is adopted. The salt chamber is not filled with ion exchange resin, the alkali chamber is filled with anion exchange resin, and the acid chamber is filled with cation exchange resin. The initial water intake of the acid chamber is a p-toluenesulfonic acid solution with a pH of 6, the initial water intake of the alkali chamber is a sodium hydroxide solution with a pH of 9, and the remaining operating conditions are the same as in Example 1. The results are shown in Table 1.

Embodiment 3

[0067] The acid chamber / salt chamber / alkali chamber (three-chamber) membrane unit composed of anion membrane-cation membrane-bipolar membrane is adopted. The salt chamber is filled with anion-cation mixed exchange resin, and the ratio of anion exchange resin to cation exchange resin is 7:3. The base compartment is filled with anion exchange resin and the acid compartment is filled with cation exchange resin. All the other operating conditions are the same as in Example 1. The results are shown in Table 1.

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Abstract

The invention relates to a device and method for processing sodium p-toluenesulfonate waste liquor. The device comprises a direct current power supply, a membrane stack, a clamping device, a carbon fiber felt electrode, an electrode liquor storage tank, an acid chamber storage tank, a waste liquor chamber storage tank, an alkali chamber storage tank, a liquor adjuster, an alkali chamber valve block, a waste liquor chamber valve block, an acid chamber valve block, an electrode chamber valve block, an acid chamber filled with a cation exchange resin, a salt chamber, an alkali chamber filled with an anion exchange resin, an anion exchange membrane, a cation exchange membrane and a bipolar membrane. A PAN (polyacrylonitrile)-based carbon fiber felt electrode used in the device and method has the characteristics of low resistance, good electric conductivity, oxidation resistance and corrosion resistance. The salt chamber is filled with a cation and anion mixed resin, and the acid chamber and the alkali chamber are respectively filled with the cation exchange resin and the anion exchange resin, so as to further improve the conductance of an electrodialysis cell, reduce the polarization and energy consumption, and lighten the membrane pollution. The device and method can be used for processing the production waste liquor of high-concentration hardly-degradable pentaerythritol triacrylate, so as to obtain acid and / or alkali and realize recycling of the waste liquor.

Description

technical field [0001] The invention relates to a process for treating high-concentration, refractory organic waste liquid and recovering acid and alkali from the waste liquid, belonging to the field of waste water treatment. [0002] technical background [0003] p-Toluenesulfonic acid is a strong organic acid. P-toluenesulfonic acid has a very wide range of functions in pharmaceutical, pesticide, polymer materials, coatings, resin and other industries. Because of its non-oxidizing properties, p-toluenesulfonic acid can be used as both a catalyst for esterification and as a curing agent for furan resin. P-toluenesulfonic acid can also catalyze transesterification reactions, condensation reactions and so on. However, a large amount of waste liquid containing sodium p-toluenesulfonate will be produced during the use of p-toluenesulfonic acid. At present, the treatment methods of waste liquid containing sodium p-toluenesulfonate mainly include incineration method, coagulat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/469C02F101/34
Inventor 汪群慧陈焕玺高云智林晗马英群程建
Owner UNIV OF SCI & TECH BEIJING
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