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Application of cationic polymer as flocculating agent

A cationic polymer and flocculant technology, applied in the direction of flocculation/sedimentation water/sewage treatment, etc., can solve the problems of slow dissolution rate and difficult use, and achieve the effects of low water content, less scum generation, and high oil content

Active Publication Date: 2015-04-29
CHINA NAT OFFSHORE OIL CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, domestic industrial flocculants are mainly cationic polyacrylamide, with a high molecular weight ranging from hundreds of thousands to several million. Commodities are sold as powders and emulsions, which are difficult to use and require special dosing equipment

Method used

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  • Application of cationic polymer as flocculating agent
  • Application of cationic polymer as flocculating agent
  • Application of cationic polymer as flocculating agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] The preparation of embodiment 1, cationic polymer MCF-1

[0062] The reaction equation is as follows:

[0063]

[0064] 22g acrylamide (Sinopharm Chemical Reagent Co., Ltd.) (C 3 h 5 NO, 71.08g / mol) and 18g of tris(dimethylamino)methyl-3-butenyl ether hydrochloride monomer were dissolved in 50mL deionized water to obtain monomer aqueous solution, and then the monomer aqueous solution was added to 8.25g Span-80 (Haian Petrochemical Plant, Jiangsu Province) and 6.75 g Tween-80 (Haian Petrochemical Plant, Jiangsu Province) in 135 g cyclohexane (Sinopharm Chemical Reagent Co., Ltd.), emulsified under a high-shear homogeneous emulsifier After 15 minutes, the emulsion was obtained. Add the above-mentioned emulsion into a 500mL four-neck bottle equipped with a stirrer, a thermometer, a dropping funnel, and a ventilation tube, and after stirring for 20 minutes, add 0.06g of potassium persulfate (Sinopharm Chemical Reagent Co., Ltd.) and 0.02g of sodium bisulfite (Sinopha...

Embodiment 3

[0075] The preparation of embodiment 3, cationic polymer MCF-3

[0076] 11g of acrylamide and 29g of tris(dimethylamino)methyl-3-butenyl ether hydrochloride monomer were dissolved in 50mL of deionized water to obtain a monomer aqueous solution, and then the monomer aqueous solution was added to 8.25g of Span-80 In 135g cyclohexane of 6.75gTween-80, emulsify for 15min under a high-shear homogeneous emulsifier to obtain an emulsion. Add the above-mentioned emulsion into a 500mL four-necked bottle equipped with a stirrer, a thermometer, a dropping funnel, and a ventilation tube, and after stirring for 20 minutes with nitrogen and deoxygenation, add dropwise an aqueous solution containing 0.06g of potassium persulfate and 0.02g of sodium bisulfite 10 mL, control the reaction temperature to 45°C, and stop the reaction after 4 hours of constant temperature. Add acetone to precipitate, filter under reduced pressure, wash with acetone twice, and filter to obtain a powder or granular ...

Embodiment 4

[0083] The flocculation effect of embodiment 4, cationic polymer MCF-1-MCF-3

[0084] (1) Crude oil

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Abstract

The invention discloses an application of a polymer as a flocculating agent. The structural formula of the polymer is shown in the formula I in the specification, wherein in the formula I, m is a natural number from 2888 to 4129 when being the number-average degree of polymerization; n is a natural number from 7684 to 27280 when being the number-average degree of polymerization; m is a natural number from 4393 to 6397 when being the weight-average degree of polymerization; n is a natural number from 11686 to 44601 when being the weight-average degree of polymerization; the flocculating agent is used for removing oil in oily sewage. In the application, the cationic polymer has the characteristics of good water solubility, convenience in use and the like, and is especially suitable for solving the problem of low removal rates of emulsified oil and suspended solids in the oily sewage produced in heavy oil fields. Besides, the flocculating agent also has the advantages of small dross production and low content of moisture and high content of oil in dross.

Description

technical field [0001] The invention relates to the application of a cationic polymer as a flocculant. Background technique [0002] With the increasing degree of heavy oil production and the concentration of polymer in the produced fluid in the Bohai Oilfield, the volume and quality of sewage water will change greatly, the density of heavy oil will be higher, the acid value will be higher, the density difference between oil and water will be small, and the emulsification will be serious, which will affect the treatment process and The chemical requirements are relatively high, and it is difficult to be effectively treated with conventional inorganic flocculants. Under the conditions of the first-stage sedimentation and second-stage filtration process of the existing sewage treatment process, in order to improve the sewage treatment effect, it is necessary to screen or develop a highly targeted and effective flocculant to ensure that the heavy oil sewage treatment meets the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/56
Inventor 张健朱玥珺靖波檀国荣陈文娟翟磊孟凡雪
Owner CHINA NAT OFFSHORE OIL CORP
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