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Air flotation agent for treating oil-containing sewage of oil field and preparation method of air flotation agent

A technology of oily sewage and flotation agent, which is applied in mining wastewater treatment, flotation water/sewage treatment, etc., can solve the problems of performance limitation, general flotation effect, low cation density, etc., and achieves good effect and fast oil removal. , the effect of high efficiency

Active Publication Date: 2022-05-10
SOUTHWEST PETROLEUM UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the cationic structural unit of the inverse demulsifier only contains one quaternary ammonium group, and the cationic density is low. When used as an air flotation agent, the performance is very limited, and the flotation effect is average.

Method used

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  • Air flotation agent for treating oil-containing sewage of oil field and preparation method of air flotation agent
  • Air flotation agent for treating oil-containing sewage of oil field and preparation method of air flotation agent
  • Air flotation agent for treating oil-containing sewage of oil field and preparation method of air flotation agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] S1) Take 20g of absolute ethanol, add 13.33g of ethyl acrylate and 6.67g of N-(3-dimethylaminopropyl) methacrylamide, stir and mix evenly, and add 0.1g of azobisisobutyronitrile after 15 minutes of deoxygenation with nitrogen , stirred and reacted for 10 h at 55° C. to obtain a copolymer solution of acrylate monomers and tertiary amine monomers.

[0026] S2) Take 230.55g of isopropanol, dissolve 50g of chlormequat and 26.85g of N,N-dimethylethanolamine together in it, react for 12h under stirring at 65°C to obtain an intermediate solution, remove the isopropanol by rotary evaporation to obtain a dry intermediate body. Take 40g of dry intermediate, add 19.28g of chloroacetyl chloride to 177.84g of dichloromethane to dissolve, then react for 12h under the condition of stirring in an ice-water bath, remove the dichloromethane by rotary evaporation, obtain high cationic density monomer after purification and drying .

[0027] S3) Add 40.1 g of absolute ethanol and 3.37 g ...

Embodiment 2

[0029] The basic implementation of this example is the same as that of Example 1, the difference being that the amount of the high cation density monomer added in step S3 of this example is 6.74 g.

Embodiment 3

[0031] The basic implementation of this example is the same as that of Example 1, the difference being that the amount of the high cation density monomer added in step S3 of this example is 11.23 g.

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Abstract

The invention discloses an air flotation agent for treating oil-containing sewage of an oil field and a preparation method of the air flotation agent. The air flotation agent is prepared through the following steps that 1, acrylate and polymerizable tertiary amine serve as monomers, absolute ethyl alcohol serves as a solvent, and solution polymerization is conducted to obtain a polyacrylate polymer with a large amount of tertiary amine on a side base; (2) mixing chlormequat chloride and N, N-dimethylethanolamine, reacting to obtain an intermediate, and reacting the intermediate with chloroacetyl chloride to obtain a high-cation-density monomer; and (3) mixing the acrylate with a large amount of tertiary amine on the side base, the tertiary amine monomer copolymer solution and a high-cation-density monomer, and reacting to obtain the flotation agent for treating the oil-containing sewage of the oil field. The prepared flotation agent has a good flotation oil removal effect on the oil field oily sewage, has the advantages of being small in dosage, high in oil removal speed, high in efficiency and free of temperature influence, and has wide application prospects in the aspect of treatment of the oil field oily sewage.

Description

technical field [0001] The invention belongs to the technical field of oil recovery, and specifically relates to an air flotation agent for treating oily sewage in oil fields and a preparation method thereof. Background technique [0002] As a large number of offshore oilfields enter the middle and late stages of water injection production, the volume of oil produced in oilfields is increasing, and the corresponding volume of oily sewage is also increasing. This is a huge challenge for the normal production of offshore oilfields. Due to the limited space of the offshore platform, it is very difficult to expand the capacity of the equipment used for oily sewage treatment, which leads to a significant shortening of the residence time of the oily sewage in the original treatment equipment, thus putting forward higher requirements for the performance of the treatment chemicals. At present, the process of treating oily sewage on offshore platforms is usually a three-stage process...

Claims

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Application Information

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IPC IPC(8): C08F220/18C08F220/60C08F220/34C08F8/44C02F1/24C02F103/10
CPCC08F8/44C08F220/1802C02F1/24C02F2103/10C08F220/60C08F220/34
Inventor 方申文张文举梁奕宁肖意辜凤洁张玉洁段明
Owner SOUTHWEST PETROLEUM UNIV