Flotation agent for oily sewage treatment and preparation method thereof

A flotation agent, oily sewage technology, applied in flotation water/sewage treatment, water/sludge/sewage treatment, special compound water treatment, etc. The problems such as rising waste discharge and excessive oil content in production water can achieve the effects of safe synthesis reaction process, easy control of synthesis reaction process, and high oil removal rate.

Active Publication Date: 2017-02-15
中海油(天津)油田化工有限公司 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] What the present invention aims to solve is that none of the existing flotation agents can satisfactorily satisfy technical problems such as the water production rate and the discharge of oily pollutants increase sharply after the offshore oil field is raised, the capacity of sewage treatment facilities is close to saturation, and the oil content of the produced water exceeds the standard after treatment. Provided is a flotation agent for treating oily sewage and a preparation method thereof. The flotation agent not only has a small dosing amount, strong foaming performance, and good flotation effect, but also has a high oil removal rate and can achieve a good Water purification effect; its preparation method is highly controllable, safe and environmentally friendly, and has universal applicability

Method used

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  • Flotation agent for oily sewage treatment and preparation method thereof
  • Flotation agent for oily sewage treatment and preparation method thereof
  • Flotation agent for oily sewage treatment and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] (1) First mix 20.6g of diethylenetriamine and 23.6g of succinic acid (the molar ratio of diethylenetriamine to succinic acid is 1:1), raise the temperature to 120°C, and stir for 5 hours to obtain amide A1;

[0028] (2) Mix the amide A1 obtained in step (1) with 138g formic acid (analytically pure, with a mass concentration of 94%) (the molar ratio of amide A1 to formic acid is 1:15) evenly, heat up to 80°C, drop The mass concentration that adds 225g is 40% formaldehyde aqueous solution (wherein the mass ratio of formaldehyde and formic acid is 1:1), reaction 1h completes, then add 69g mass concentration and be 50% sodium hydroxide aqueous solution (wherein the sodium hydroxide mass is 50% of the mass of formic acid), stirred for 0.5h hour, adjusted the pH value of the reactant at 10-12, allowed to stand for stratification, and took the upper oil to be polyamide B1;

[0029] (3) Mix the polyamide B1 obtained in step (2), 1,4-dibromobutane with 30% mass of polyamide B1, ...

Embodiment 2

[0032] (1) First mix 29.2g of triethylenetetramine and 29.2g of adipic acid (the molar ratio of triethylenetetramine to adipic acid is 1:1), raise the temperature to 165°C, and stir for 1.5h to obtain amide A2 ;

[0033] (2) Mix the amide A2 obtained in step (1) with 295g formic acid (analytically pure, with a mass concentration of 94%) (the molar ratio of amide A2 to formic acid is 1:32) evenly, heat up to 100°C, and add dropwise The mass concentration of 160g is 40% formaldehyde aqueous solution (wherein the molar ratio of formaldehyde and formic acid substance is 1:3), reaction 4h finishes, then add 295g mass concentration and be 50% sodium hydroxide aqueous solution (wherein the sodium hydroxide mass is the formic acid mass 100%), stirred for 2 hours, adjusted the pH value of the reactant at 10 to 12, allowed to stand for stratification, and took the upper oily substance as polyamide B2;

[0034] (3) the polyamide B2 that step (2) obtains, the 1,4-dibromobutane of 60% of ...

Embodiment 3

[0037] (1) First mix 37.9g ​​of tetraethylenepentamine and 23.6g of succinic acid (the molar ratio of tetraethylenepentamine to succinic acid is 1:1), raise the temperature to 140°C, stir for 3 hours, and obtain amide A3;

[0038] (2) Mix the amide A3 obtained in step (1) with 184g formic acid (analytically pure, with a mass concentration of 94%) (the molar ratio of amide A3 to formic acid is 1:20) evenly, heat up to 90°C, and add dropwise The mass concentration of 150g is 40% formaldehyde aqueous solution (wherein the molar ratio of formaldehyde and formic acid substance is 1:2), reaction 2h finishes, then add 110.4g mass concentration and be 50% sodium hydroxide aqueous solution (wherein the mass concentration of sodium hydroxide is formic acid 60% of the mass), stirred for 1 hour, adjusted the pH value of the reactant at 10 to 12, allowed to stand for stratification, and took the upper oily substance as polyamide B3;

[0039] (3) the polyamide B3 that step (2) obtains, the 1,...

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Abstract

The invention belongs to the technical field of oil and gas water treatment, and discloses a flotation agent for oily sewage treatment and preparation method thereof, first mixing organic polyamine and organic acid by certain proportion, reacting and resulting in amide A under certain temperature; then mixing amide A and formic acid evenly by certain proportion; dropping the solution of formaldehyde after raising temperature and reacting; then mixing with sodium hydroxide solution and stirring, regulating PH then stilling and layering, removing the top layer oil and resulting in polyamide B; mixing polyamide B, 1, 4 dibromobutane, organic solvent, refluxing and reacting under certain temperature; mixing with halogenated and reacting still and resulting in viscous Gemini quaternary ammonium polymer C; mixing Gemini quaternary ammonium polymer C, long chain alkyl dimethyl benzyl ammonium chloride and organic solvent, stirring evenly and resulting in flotation agent. The dosage of the flotation agent in the invention is small, the foamability of the flotation agent is strong, the flotation agent has good flotation effect, and high oil removal rate, achieves good effect of water purification; the controllability of the preparation method is strong, the flotation agent is safe and environmentally friendly, and possesses universal applicability.

Description

technical field [0001] The invention belongs to the technical field of oil, gas and water treatment, and in particular relates to a flotation agent for oily sewage treatment and a preparation method thereof. Background technique [0002] As oilfield exploitation enters the middle and later stages, the comprehensive water content of the produced liquid gradually increases. At present, under the condition of ensuring stable oil production, the increase in water production makes the capacity of the treatment facilities close to saturation. Due to the limited storage space of offshore oilfields, once the sewage treatment is not up to standard, it will lead to serious consequences of shutting down the oilfield, reducing production or even stopping production. According to statistics, in 2012, the total amount of sewage produced exceeded 150 million cubic meters. How to solve the problems of short treatment time, different characteristics, and huge treatment volume of offshore oi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/24C08G73/00C08G69/28
CPCC02F1/24C02F2305/04C08G69/28C08G73/00
Inventor 张国欣陆原郭海军胡廷王永军程艳
Owner 中海油(天津)油田化工有限公司
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