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Preparation method of coal tar wastewater demulsifier

The technology of a demulsifier and coal tar, which is applied in the field of preparation of a demulsifier for coal tar wastewater, can solve the problems of pipeline deposition, blockage, and high oil content of coal tar wastewater, and achieves less dosage, simple preparation method and good demulsification effect. Effect

Inactive Publication Date: 2019-09-17
LULIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The present invention provides a preparation method of coal tar wastewater demulsifier in order to solve the technical problem that the oil content of coal tar wastewater is too high, resulting in serious pipeline deposition or even blockage

Method used

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  • Preparation method of coal tar wastewater demulsifier
  • Preparation method of coal tar wastewater demulsifier
  • Preparation method of coal tar wastewater demulsifier

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Add styrene, acrylic acid, triethanolamine, deionized water, concentrated sulfuric acid, ammonium persulfate, V C , n-nonyltrimethylammonium chloride was condensed and refluxed at 90°C for 6 hours and cooled to room temperature. It was observed that it was a liquid with a certain viscosity, and the demulsifier for coal tar wastewater was obtained.

[0023] Table 1

[0024]

Embodiment 2

[0026] Add acrylic acid, triethanolamine, N,N-dimethylformamide (DMF), concentrated sulfuric acid, and benzoyl peroxide sequentially according to the amount in Table 2 while stirring, and condense and reflux at 90°C for 6 hours. After cooling to room temperature, it can be observed that the solution has a particularly high viscosity and turns dark brown in color. The viscous dark brown solution is the coal tar wastewater demulsifier.

[0027] Table 2

[0028]

Embodiment 3

[0030] Take acrylic acid, triethanolamine, toluene, concentrated sulfuric acid, and benzoyl peroxide in a three-necked flask according to the amount in Table 3, condense and reflux at about 110°C, and the solution turns into a yellow colloidal liquid. It is caramel in color. After reacting for 3h, hydroquinone was added. Reaction 6h, stop the reaction. After cooling to room temperature, the obtained caramel-colored colloidal liquid is the demulsifier for coal tar wastewater.

[0031] table 3

[0032]

[0033] Two, test the demulsification performance of the coal tar wastewater demulsifier prepared above:

[0034] The coal tar wastewater from Datuhe No. 3 Plant was put into a quartz cuvette, and the transmittance (T) before precipitation was measured to be 11.4%, and the absorbance (A) to be 0.941. Then add the coal tar wastewater demulsifier prepared above, stir, let stand for 0.5 hours, take the clear liquid and add it to a quartz cuvette, and measure the absorbance A ...

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Abstract

The invention relates to the technical field of preparation of demulsifiers, in particular to a preparation method of a coal tar wastewater demulsifier. The preparation method of the coal tar wastewater demulsifier comprises the following steps of sequentially adding agents into a three-necked flask while stirring an obtained mixture, and after reflux condensation and heating are conducted, cooling the obtained mixture to room temperature to obtain the coal tar wastewater demulsifier, wherein the agents at least comprise acyclic acid, triethanolamine and concentrated sulfuric acid. The coal tar wastewater demulsifier prepared by means of the preparation method has a better demulsification effect than those of existing demulsifiers on the market, and is high in demulsification speed, little in usage and environmentally friendly. The preparation method of the demulsifier is simple, preparation is convenient, and the demulsifier is fast, efficient and low in cost, and has small toxic and side effects.

Description

technical field [0001] The invention relates to the technical field of demulsifier preparation, in particular to a preparation method of a coal tar wastewater demulsifier. Background technique [0002] The specific gravity of coal tar is higher than that of water, slightly soluble in water, and soluble in most organic solvents such as benzene, ethanol, ether, chloroform, acetone, etc. It has a certain solubility and a special odor, it is flammable but does not burn violently, and is corrosive. According to the different temperatures of coal carbonization, coal tar can be divided into low-temperature coal tar (450-650°C), medium-temperature coal tar (900-1000°C) and high-temperature coal tar (1000°C). [0003] The composition of high-temperature coal tar contains aromatic hydrocarbons and heterocyclic organic compounds, etc. It is estimated that the total number of components is about 10,000, and there are only more than 10 kinds of compounds in high-temperature tar with a m...

Claims

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Application Information

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IPC IPC(8): C02F1/40B01D17/05
CPCB01D17/047C02F1/40
Inventor 秦永其邓立强王毅郭晨杨卫民
Owner LULIANG UNIV
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