Multi-claw cationic functional monomer

A technology of methyl and butenyl ether, which is applied in the field of multi-claw cationic functional monomers, can solve problems such as difficulty in use and slow dissolution speed, and achieve the effects of less scum generation, low moisture content, and good water solubility

Active Publication Date: 2015-07-22
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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  • Multi-claw cationic functional monomer
  • Multi-claw cationic functional monomer
  • Multi-claw cationic functional monomer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Example 1. Preparation of polyclaw cationic functional monomer tris(dimethylamino)methyl-3-butenyl ether hydrochloride

[0043] (1) Synthesis of hexamethylproguanil

[0044] ① Synthesis of dimethylamino-N,N-dimethylchloroalkenimium chloride (C5H12Cl2N2, 171.07g / mol)

[0045] The reaction equation is as follows:

[0046]

[0047] Second, add 1mol of tetramethylurea (Sinopharm Chemical Reagent Co., Ltd., C 5 H 12 N 2 O, 116.16g / mol), 200mL of chloroform (Jinan Reagent Factory), under nitrogen protection, 2.1mol of oxalyl chloride (Sinopharm Chemical Reagent Co., Ltd., C 2 H 2 Cl 2 , 126.93g / mol), stirred, heated to reflux in an oil bath, cooled to room temperature after 4 hours of reaction, distilled under reduced pressure to distill out the concentrate, added 200 mL of anhydrous ether (Tianjin Bodi Chemical Co., Ltd.), cooled to 0 °C, The solid product obtained by suction filtration was washed with anhydrous ether for several times, and dried in vacuum for 24 h...

Embodiment 2

[0062] Example 2. Preparation of cationic polymer MCF-1 using monomer tris(dimethylamino)methyl-3-butenyl ether hydrochloride

[0063] The reaction equation is as follows:

[0064]

[0065] 22g of acrylamide (Sinopharm Chemical Reagent Co., Ltd.) (C 3 H 5 NO, 71.08g / mol) and 18g tris(dimethylamino)methyl-3-butenyl ether hydrochloride monomer were dissolved in 50mL deionized water to obtain an aqueous monomer solution, and then the monomer aqueous solution was added to a solution containing 8.25g Span-80 (Jiangsu Haian Petrochemical Plant) and 6.75g Tween-80 (Jiangsu Haian Petrochemical Plant) in 135g cyclohexane (Sinopharm Group Chemical Reagent Co., Ltd.), emulsified under a high shear homogenizer 15min to obtain an emulsion. Add the above-mentioned emulsion to the 500mL four-necked flask equipped with a stirrer, thermometer, dropping funnel, and ventilation tube, and after stirring for 20 min of nitrogen and oxygen removal, dropwise add 0.06g potassium persulfate (Sino...

Embodiment 3

[0070] Example 3. Preparation of cationic polymer MCF-2 using monomer tris(dimethylamino)methyl-3-butenyl ether hydrochloride

[0071] Dissolve 16g acrylamide and 24g tris(dimethylamino)methyl-3-butenyl ether hydrochloride monomer in 50mL deionized water to obtain an aqueous monomer solution, and then add the monomer aqueous solution to a solution containing 8.25g Span-80 and 6.75g of Tween-80 in 135g of cyclohexane, emulsified under a high shear homogenizer for 10min to obtain an emulsion. Add the above-mentioned emulsion to the 500mL four-necked flask equipped with a stirrer, a thermometer, a dropping funnel, and a vent pipe, and after stirring for 20min of nitrogen and oxygen removal, add dropwise an aqueous solution containing 0.06g potassium persulfate and 0.02g sodium bisulfite. 10 mL, the reaction temperature was controlled to be 45 °C, and the reaction was stopped after 4 h of constant temperature. Add acetone for precipitation, filter under reduced pressure, wash twi...

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Abstract

The invention discloses a tri(dimethylamino)methyl-3-butenylether hydrochloride. The structural formula is disclosed as Formula I. The cationic functional monomer is prepared by the following steps: (1) reacting tetramethylurea with oxalyl chloride to obtain dimethylamino-N,N-dimethylchloromethyleneiminium chloride; (2) reacting dimethyl amine with the dimethylamino-N,N-dimethylchloromethyleneiminium chloride to obtain hexamethyl proguanil; (3) reacting 3-butenyl-1-ol with sodium hydroxide to obtain 3-butenyl-1-sodium alkoxide; and (4) reacting the hexamethyl proguanil and the 3-butenyl-1-sodium alkoxide to obtain the tri(dimethylamino)methyl-3-butenylether hydrochloride. The multi-claw cationic functional monomer can be used for preparing a cationic polymer; and the cationic polymer 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 present invention relates to a multi-claw type cationic functional monomer. Background technique [0002] With the increase in the degree of heavy oil exploitation and the concentration of polymer in the produced fluid in Bohai Oilfield, the amount of sewage water and water quality change greatly, the density of heavy oil is larger, the acid value is higher, the difference between oil and water density is small, and the emulsification is serious. The chemical requirements are high, and it is difficult to effectively treat with conventional inorganic flocculants. Under the conditions of the existing sewage treatment process of primary sedimentation and secondary filtration, in order to improve the effect of sewage treatment, it is necessary to screen or develop a flocculant with strong pertinence and good effect, so as to ensure that the heavy oil sewage treatment meets the standard and re-injection. [0003] Compared with inorganic flocculants, or...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C217/42C07C213/06C08F220/56C08F216/14C08F2/30C02F1/56C02F1/40
Inventor 张健朱玥珺靖波檀国荣陈文娟翟磊胡科
Owner CHINA NAT OFFSHORE OIL CORP
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