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Method for treating nitrobenzene waste water

A technology for nitrobenzene wastewater and wastewater, applied in natural water treatment, chemical instruments and methods, water/sewage multi-stage treatment, etc., to achieve the effect of realizing reuse and avoiding pollution

Active Publication Date: 2012-04-18
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0011] Comparative literature 1 (synthesis and properties of sulfonated acetone-formaldehyde polycondensate as an additive to coal-water slurry, Zhou Mingsong, Qiu Xueqing, etc., Fine Chemical Industry, 2005, No.22(3): 185-188) reported that coal-water in pure water The synthesis process of slurry additive sulfonated acetone-formaldehyde polycondensate, but it has not been realized to prepare this kind of polymer in chemical wastewater

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  • Method for treating nitrobenzene waste water
  • Method for treating nitrobenzene waste water
  • Method for treating nitrobenzene waste water

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] Take 100mL of nitrobenzene wastewater, add 4-9g of sodium sulfite to it respectively, dissolve and heat to 40°C, add 10mL of acetone, react for 30min and then raise the temperature to 80°C, add 20mL of formaldehyde solution, continue the reaction for 1h, keep the temperature and add nitric acid 950 parts of base benzene waste water, the effective concentration 0.5% coal-water slurry additive that reacts 1 hour to make; Natural cooling to room temperature, its different molecular weight distribution curves are as follows: figure 1 As shown, the molecular weight of the product decreases significantly with the increase of the amount of sulfonating agent. Wherein the occurrence of sodium sulfite being 4g causes the hydrophilicity of the product to decrease due to insufficient sulfonation, forming a light yellow insoluble matter.

[0055] The non-sticky coal is ground by a ball mill to obtain coal powder with an average particle size of less than 75 μm and the mass percentag...

Embodiment 2

[0057] Take 100mL of nitrobenzene wastewater, add 5g of sodium sulfite to it respectively, dissolve and heat to 40°C, add 6-14mL of acetone, react for 30min and then raise the temperature to 80°C, add 20mL of formaldehyde solution, continue the reaction for 1h, keep the temperature and add nitric acid 950 parts of base benzene waste water, the effective concentration 0.5% coal-water slurry additive that reacts 1 hour to make; Natural cooling to room temperature, its different molecular weight distribution curves are as follows: figure 2 As shown, with the increase of the amount of acetone, the molecular weight of the product first increases and then decreases. When the amount of acetone is small, the molecular weight may be small due to excessive sulfonation, and the initial reaction rate is low; and when the amount of acetone is large, the reaction rate is too fast, and the large ketone-aldehyde ratio is likely to cause a reduction in the degree of polymerization, so that Mo...

Embodiment 3

[0060] Take 100mL of nitrobenzene wastewater, add 5g of sodium sulfite to it respectively, dissolve and heat to 40°C, add 10mL of acetone, react for 30min and then heat up to 80°C, add 12-24mL of formaldehyde solution, continue the reaction for 1h, then keep the temperature and add nitric acid 950 parts of base benzene waste water, the effective concentration 0.5% coal-water slurry additive that reacts 1 hour to make; Natural cooling to room temperature, its different molecular weight distribution curves are as follows: image 3 As shown, with the increase of the amount of formaldehyde, the molecular weight distribution of the product has a greater impact.

[0061] The non-sticky coal is ground by a ball mill to obtain coal powder with a mass percentage of particles with an average particle size of less than 75 μm greater than 80%, and the coal-water slurry additive obtained by reacting 20 ml of formaldehyde and the non-sticky coal powder are mixed according to a mass ratio of ...

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Abstract

The invention relates to a method for treating nitrobenzene waste water. The method comprises steps of: step 1. according to a molar ratio, taking 50 parts of nitrobenzene waste water with a pH of 9-13 and adding 0.2-0.4 parts of sulfonating agent; step 2. adding 1-2 parts of ketone compound or acrylic acid compound into the nitrobenzene waste water for acetone sulfonation reaction; step 3. adding 2-4 parts of aldehyde compound or oxirane into nitrobenzene waste water for condensation polymerization; step 4. adding 450-950 parts of nitrobenzene waste water, continuing the condensation polymerization in step 3. for 0.5-1.0 h, thereby preparing a coal water slurry additive with an effective concentration of 0.5-1%. According to the method for treating nitrobenzene waste water of the invention, the coal water slurry additive is prepared in the waste water phase through solution polymerization, so as to avoid environmental pollution caused by discharge of nitrobenzene waste water and realize reuse of nitrobenzene waste water.

Description

technical field [0001] The invention relates to a process for treating nitrobenzene wastewater, in particular to a method for treating nitrobenzene wastewater. Background technique [0002] The chemical industry is a traditional pillar industry in my country. The important chemical raw materials and products produced are widely used in national defense, printing and dyeing, plastics, pesticides and pharmaceutical industries. With the rapid development of the national economy, my country's chemical industry has also entered a period of rapid development. The level of equipment and technology has been significantly improved, and the production process and equipment have been continuously updated. At the same time, the total amount of wastewater discharged by the chemical industry has also continued to rise. The rapid development of the chemical industry has brought about continuous deterioration of the water environment. At present, industrial concentration areas in Jiangsu,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04C02F103/36C02F101/38
Inventor 李正琪万国晖李昕阳侯秀华程学文
Owner CHINA PETROLEUM & CHEM CORP
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