Preparation method of cationic polymer

A cationic polymer, cationic degree 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 effect of low water content, less scum formation, and high oil content

Active Publication Date: 2014-05-07
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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  • Preparation method of cationic polymer
  • Preparation method of cationic polymer

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Experimental program
Comparison scheme
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Embodiment 1

[0059] The preparation of embodiment 1, cationic polymer MCF-1

[0060] The reaction equation is as follows:

[0061]

[0062] 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 2

[0067] The preparation of embodiment 2, cationic polymer MCF-2

[0068] 16g of acrylamide and 24g 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 with 6.75gTween-80, emulsify for 10min 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 granula...

Embodiment 3

[0073] The preparation of embodiment 3, cationic polymer MCF-3

[0074] 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 6.75g Tween-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...

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Abstract

The invention discloses a preparation method of a cationic polymer. The structural formula of the cationic polymer is disclosed as Formula I. The method comprises the following steps: (1) reacting 3-butenyl-1-ol with sodium hydroxide to obtain 3-butenyl-1-sodium alkoxide; and (2) reacting hexamethyl proguanil with the 3-butenyl-1-sodium alkoxide to obtain a cationic monomer tri(dimethylamino)methyl-3-butenylether hydrochloride disclosed as Formula II; and (3) in the presence of an emulsifier and an initiator, carrying out reversed-phase emulsion polymerization on acrylamide and the tri(dimethylamino)methyl-3-butenylether hydrochloride to obtain the cationic polymer disclosed as Formula I. The cationic polymer prepared by the method can be used as an organic flocculant, has the characteristics of favorable water solubility and the like, is convenient to use, and is especially suitable for solving the problem of low removal rate of emulsified oil and solid suspended substances in oily sewage produced by heavy oil oilfields. Besides, the flocculant has the advantages of low scum generation amount, and low water content and high oil content in scum.

Description

technical field [0001] The invention relates to a preparation method of a cationic polymer, which belongs to the field of polymer material synthesis. 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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/56C08F216/14C08F2/32C02F1/56
Inventor 朱玥珺张健冯国智康晓东靖波翟磊薛新生
Owner CHINA NAT OFFSHORE OIL CORP
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