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A kind of method that utilizes nitrobenzene wastewater to prepare emulsified residue

A technology for nitrobenzene wastewater and residual oil, applied in chemical instruments and methods, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc., can solve problems such as large water consumption, reduce treatment costs, Achieve the effect of reuse and avoid pollution

Active Publication Date: 2016-12-28
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Most of the existing technologies use clear water or ordinary water to prepare emulsified residue, which consumes a lot of water resources, and there are few reports on the use of chemical wastewater to prepare emulsified residue

Method used

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  • A kind of method that utilizes nitrobenzene wastewater to prepare emulsified residue

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] Example 1: Take 0.3g of alkylphenol polyoxyethylene ether (OP-10) and 0.1g of sodium dodecyl sulfate (SDS) to make a compound formula emulsifier;

[0047] Take 20g of nitrobenzene wastewater (pH 11, COD 5000mg / L) in a three-necked flask, mix and dissolve it with an emulsifier and 0.005g of polyacrylamide (1630s) to prepare an emulsifier aqueous solution, heat it to 80°C and keep it warm.

[0048]Weigh 80g of residual oil, heat it to 120°C to melt it, then cool it down to 80°C, and add it to the mixer. Under the condition that the stirring rate is 500 revolutions per minute, the emulsifier aqueous solution is evenly added to the molten residual oil, and the emulsified residual oil is obtained by stirring for 15 minutes. The prepared emulsified residue has a viscosity of 428mPa·S and can be stored stably for more than 3 days at room temperature.

Embodiment 2

[0049] Example 2: Take 0.1g of alkylphenol polyoxyethylene ether (OP-10) and 0.2g of sodium lignosulfonate to make a compound formula emulsifier;

[0050] Take 30 g of nitrobenzene wastewater (pH 12, COD 2000 mg / L) in a three-necked flask, mix and dissolve with emulsifier and 0.05 g of hydroxymethyl cellulose to prepare emulsifier aqueous solution, heat to 75 °C and keep warm.

[0051] Weigh 70g of residual oil, heat it to 120°C to make it melt, cool down to 75°C, and add it to the mixer. Under the condition that the stirring rate is 800 revolutions per minute, the emulsifier aqueous solution is evenly added to the molten residual oil, and the emulsified residual oil is obtained by stirring for 5 minutes. The obtained emulsified residue has a viscosity of 503 mPa·S and can be stored stably for more than 3 days at room temperature.

Embodiment 3

[0052] Example 3: Take 5g of alkylphenol polyoxyethylene ether (OP-10) and 2g of Tween 80 to make a compound formula emulsifier;

[0053] Take 10 g of nitrobenzene wastewater (pH 13, COD 10000 mg / L) in a three-necked bottle, mix and dissolve with emulsifier and 0.003 g of polyvinyl alcohol to prepare emulsifier aqueous solution, heat to 70 °C and keep it warm.

[0054] Weigh 90g of residual oil, heat it to 130°C to melt it, cool down to 70°C, and add it into the mixer. Under the condition that the stirring rate is 700 revolutions per minute, the emulsifier aqueous solution is evenly added to the molten residual oil, and the emulsified residual oil is obtained by stirring for 10 minutes. The prepared emulsified residue has a viscosity of 473mPa·S and can be stored stably for more than 3 days at normal temperature.

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Abstract

The invention relates to a method for preparing emulsified residual oil by using nitrobenzene wastewater. The steps are: step 1, emulsifier preparation; step 2, mixing nitrobenzene wastewater to prepare emulsifier aqueous solution; step 3: emulsifier aqueous solution is heated to 70 ~ Keep warm at 80°C; Step 4: Weigh the residual oil, heat it to melt, then cool down to 70-80°C, and add it to the mixer; Step 5: Evenly add the emulsifier aqueous solution to the molten residual oil, stir for 5- The emulsified residue can be obtained in 15 minutes. The method for preparing emulsified residue by using nitrobenzene wastewater according to the present invention uses nitrobenzene wastewater to prepare emulsified residue, avoids the pollution caused by the discharge of nitrobenzene wastewater to the environment, and makes it into a product, creating economic benefits.

Description

technical field [0001] The invention relates to a method for treating nitrobenzene wastewater, in particular to a method for preparing emulsified residue by using nitrobenzene wastewater. Background technique [0002] The chemical industry is a traditional pillar industry in my country. The chemical raw materials and products produced are widely used in various fields and make great contributions to the national economy. The chemical industry is also a highly polluting industry. The wastewater produced often contains high concentrations of organic pollutants. It is difficult to meet the discharge standards through ordinary wastewater treatment methods (such as biochemical treatment, membrane treatment, etc.), causing huge pressure on the environment. [0003] Nitrobenzene wastewater is high-concentration and difficult-to-degrade wastewater produced during the production of nitrobenzene by benzene chemical plants. This wastewater has the characteristics of large water volume,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J3/03C08L91/00C08L95/00C02F9/10
Inventor 李正琪李昕阳邢毅侯秀华
Owner CHINA PETROLEUM & CHEM CORP