A kind of polymer water flooding water purifying agent and its preparation method and application

A polymer and water clearing agent technology, applied in the direction of flocculation/sedimentation water/sewage treatment, mining wastewater treatment, etc., can solve the problems of increasing the difficulty of oil and water treatment, hindering the aggregation and coalescence of oil droplets, and increasing the viscosity of sewage, achieving excellent results The effect of clear water and degreasing, improving the hydrophilic/hydrophobic properties, and enhancing the destructive ability

Active Publication Date: 2016-03-23
CHINA NAT OFFSHORE OIL CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the one hand, the residual polymer increases the viscosity of sewage, which hinders the aggregation and coalescence of oil droplets, and it is difficult to separate oil and water by natural sedimentation alone; on the other hand, the residual polymer is similar to the emulsifier, PAM Concentrated on the oil-water interface, it interacts with crude oil components to form a high-strength and good-elastic interfacial film, resulting in thickening of the oil-water mixed emulsified layer, which greatly increases the difficulty of oil-water treatment
[0003] It is difficult to meet the water quality requirements of reinjection into the original formation by using the traditional water flooding conventional treatment process to treat the sewage containing aggregates
At present, the research on the treatment technology and treatment process of polymer-containing sewage has attracted much attention, but there is no practical solution

Method used

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  • A kind of polymer water flooding water purifying agent and its preparation method and application
  • A kind of polymer water flooding water purifying agent and its preparation method and application
  • A kind of polymer water flooding water purifying agent and its preparation method and application

Examples

Experimental program
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Effect test

Embodiment 1

[0047] Embodiment 1, the synthesis of water purifying agent CP-1

[0048] (1) Synthesis of α,α-bis(4-aminophenyl)-1-(3',5'-dimethyl-4'-sulfophenyl)methane

[0049] 1) Synthesis of aromatic diamines

[0050] Add 37.20g (0.40mol) of aniline and 70mL of distilled water to a three-necked flask equipped with mechanical stirring, a condenser, and a nitrogen port, and stir thoroughly under nitrogen protection. 50.00 mL of concentrated hydrochloric acid (37% by mass) was slowly added dropwise, and the system temperature was maintained at 40°C, and then 29.52 g (0.22 mol) of 3,5-dimethylbenzaldehyde was added in batches. After the system was vigorously stirred under reflux for 12h, the temperature of the reaction system was down to 50°C, and 34.60g of anhydrous potassium carbonate powder was added in batches under stirring until the system no longer produced bubbles. The solution was subjected to steam distillation, and a solid powder was obtained after suction filtration. Rinse the...

Embodiment 2

[0059] Embodiment 2, the synthesis of water purifying agent CP-2

[0060] (1) Synthesis of α,α-bis(4-amino-3,5-diethylphenyl)-1-(4'-methoxy-5'-sulfophenyl)methane

[0061] 1) Synthesis of aromatic diamines

[0062] Add 59.68g (0.40mol) of 2,6-diethylaniline and 120.00mL of distilled water to a three-necked flask equipped with mechanical stirring, a condenser, and a nitrogen port, and stir thoroughly under nitrogen protection. Slowly add 61.50mL of sulfuric acid solution (mass fraction 35%) dropwise, and maintain the system temperature at 30°C, then add 28.56g (0.21mol) of 4-methoxybenzaldehyde in batches. After the system was vigorously stirred for 6 h under reflux, the temperature of the reaction system was down to 50° C., and 36.90 g of sodium bicarbonate powder was added in batches under stirring until the system no longer produced bubbles. The solution was subjected to steam distillation, and a solid powder was obtained after suction filtration. Rinse the solid powder w...

Embodiment 3

[0071] Embodiment 3, the synthesis of water purifying agent CP-3

[0072] (1) α,α-bis(4-amino-3,5-dimethoxyphenyl)-1-(3',5'-dimethyl-4'-sulfophenyl)methane

[0073] 1) Synthesis of aromatic diamines

[0074] Add 61.28g (0.40mol) of 2,6-dimethoxyaniline and 135.00mL of distilled water to a three-necked flask equipped with mechanical stirring, a condenser, and a nitrogen port, and stir thoroughly under nitrogen protection. 40.50 mL of concentrated hydrochloric acid (37% by mass) was slowly added dropwise, the system temperature was maintained at 35°C, and then 28.14 g (0.21 mol) of 3,5-dimethylbenzaldehyde was added in batches. After the system was vigorously stirred for 6 h under reflux, the temperature of the reaction system was reduced to 50° C., and 16.40 g of sodium hydroxide powder was added in batches under stirring. The solution was subjected to steam distillation, and a solid powder was obtained after suction filtration. Rinse the solid powder with hot water, recryst...

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Abstract

The invention discloses a polymer flooding sewage clarifier as well as a preparation method and application of the polymer flooding sewage clarifier. The preparation method of the polymer flooding sewage clarifier comprises the following steps of (1) adding a mixture of sulfonated aromatic diamine as shown in a formula I and ethylenediamine into a product obtained through the reaction of sulfonated aromatic diamine as shown in the formula I and acrylic acid methyl ester to continue to react to obtain 1.0-generation polyamide-amine; repeating the two-step reaction twice to obtain 3.0-generation amino-terminated polyamide-amine; (2) enabling acryloyloxyethyl trimethyl ammonium chloride and acrylic amide to be subjected to polymerization reaction under the initiating action of an initiator; enabling the polymerization reaction product and the 3.0-generation amino-terminated polyamide-amine to be subjected to addition reaction to obtain the polymer flooding sewage clarifier. The organic polymer water clarifier has excellent water clarifying and oil removing effects for polymer-contained sewage, the treated water is clear, the oil content is less than 40mg / L, and no viscous polymer-contained oil sludge is generated, so that the polymer flooding sewage clarifier is widely applied on the aspect of sewage treatment of a polymer flooding produced liquid.

Description

technical field [0001] The invention relates to a polymer water flooding water purifying agent and a preparation method and application thereof, belonging to the technical field of petroleum processing. Background technique [0002] With the development of tertiary oil recovery technology, polymer flooding technology has been widely used in my country's land oil fields and offshore oil fields, and has become an important means of increasing oil production. Currently, partially hydrolyzed polyacrylamide (HPAM) is the most widely used polymer in polymer injection oilfields. With the increasing concentration of residual polymers in the production fluid at the production end, the sewage treatment of the production fluid is facing great challenges. On the one hand, the residual polymer increases the viscosity of sewage, hinders the aggregation and coalescence of oil droplets, and it is difficult to separate oil and water by natural sedimentation alone; on the other hand, the res...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G81/02C08G83/00C08F220/34C08F220/56C02F1/56C02F103/10
Inventor 翟磊张健靖波檀国荣
Owner CHINA NAT OFFSHORE OIL CORP
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