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Initiator composition used for preparing oil displacing agent of polymer used in tertiary oil recovery

A composition and initiator technology, which is applied in the field of compound redox initiator composition, can solve the problems of uncontrollable, high residual single content, fast initiation rate, etc., and achieve lower polymerization initiation temperature, low residual single content, and improved conversion rate effect

Inactive Publication Date: 2014-05-07
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is that the polyacrylamide polymers prepared with conventional redox initiators in the prior art have fast and uncontrollable initiation rates, contradictions between the relative molecular weight and solubility of the polymers, and residual single high content problem

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Dissolve 210g of acrylamide in 550g of deionized water, add 0.25g of disodium ethylenediaminetetraacetate, stir and dissolve evenly, then use 2% mass concentration of sodium hydroxide aqueous solution and 2% mass concentration of hydrochloric acid solution to adjust the pH value to 9.0 , adjust the temperature of the constant temperature water bath to 10°C, introduce high-purity nitrogen to remove oxygen, and after 40 minutes, add 0.3% mass concentration of urea aqueous solution 25g, 0.2% mass concentration of N-(N',N'-dimethylaminomethylene Base) 15g of methacrylamide aqueous solution, 15g of 0.25% mass concentration of dimethylamine aqueous solution, 10g of 0.15% mass concentration of ammonium persulfate aqueous solution, 0.15% mass concentration of 2,2'-azo[2-(2-imidazole 10g of phenin-2-yl) propane] dihydrochloride aqueous solution, stirring and initiating polymerization reaction, after half an hour, raise the temperature of the water bath to 22°C, react for 3 hours,...

Embodiment 2

[0021] Dissolve 212g of acrylamide in 560g of deionized water, add 0.3g of disodium ethylenediaminetetraacetate, stir and dissolve evenly, then use 2% mass concentration of sodium hydroxide aqueous solution and 2% mass concentration of hydrochloric acid solution to adjust the pH value to 8.8 , adjust the temperature of the constant temperature water bath to 10°C, introduce high-purity nitrogen to remove oxygen, and after 40 minutes, add 35g of 0.3% mass concentration of urea aqueous solution and 18g of 0.2% mass concentration of N,N-dimethylaminoethyl methacrylate aqueous solution , 10g of 1,2-propanediamine aqueous solution of 0.25% mass concentration, 12g of 0.15% mass concentration of potassium persulfate aqueous solution, 0.15% mass concentration of 2,2'-azo[2-(2-imidazoline-2- Base) propane] dihydrochloride aqueous solution 8g, stir and initiate polymerization reaction, after half an hour, raise the water bath temperature to 22°C, react for 3 hours, raise the water bath te...

Embodiment 3

[0024] Dissolve 180g of acrylamide and 30g of 2-acrylamido-2-methylpropanesulfonic acid in 602g of deionized water, add 0.4g of disodium edetate and 6.6g of sodium hydroxide, stir and dissolve evenly, and use 2 % mass concentration of sodium hydroxide aqueous solution and 2% mass concentration of hydrochloric acid solution to adjust the pH value to 8.1, adjust the temperature of the constant temperature water bath to 10 ° C, introduce high-purity nitrogen to remove oxygen, and after 40 minutes, add 0.3% mass concentration of thiourea in sequence 22g of aqueous solution, 10g of ammonia solution with 1% mass concentration, 18g of 0.2% mass concentration of N,N-dimethylaminoethyl methacrylate aqueous solution, 15g of 0.25% mass concentration of hexamethyleneimine aqueous solution, 0.15% mass concentration 20 g of potassium persulfate aqueous solution, 12 g of azobis(2,5-dimethyl-6-carboxy) hexanonitrile solution with a mass concentration of 0.15%, stirred and initiated polymerizat...

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Abstract

The invention relates to an initiator composition used for preparing an oil displacing agent of polymer used in tertiary oil recovery, and mainly solves the problems in the prior art that in polyacrylamide polymers prepared from a conventional redox initiator, the initiating rate is high, the reaction is not controllable, and the relative molecular mass of polymer contradicts with solubility. According to the invention, a compound redox initiator composition is adopted, and comprises the following components in weight percentage: 1) 0.05-40% of persulfate salt, 2) 0.1-60% of aqua ammonia, urea, or thiourea, 3) 0.01-60% of aliphatic primary amine compound represented by the formula of NH2R1, aliphatic secondary amine compound represented by the formula of NHR2R3, aliphatic tertiary amine compound represented by the formula of NR4R5R6, or aliphatic quaternary amine compound represented by the formula of N<+>R7R8R9R10. The problems are excellently solved, and the initiator composition can be applied to the industrial production of the oil displacing agent of the polymer used in tertiary oil recovery.

Description

technical field [0001] The invention relates to a composite redox initiator composition for preparing a polymer oil displacement agent for tertiary oil recovery and an initiation process thereof. Background technique [0002] Acrylamide polymer is a kind of multifunctional water-soluble polymer obtained by homopolymerization or copolymerization of acrylamide. Its main chain has a large number of active side groups (amide groups) and / or other groups (such as hydroxyl groups, sulfonic acid groups or N-substituent groups, etc.), which endow the polymer with many excellent properties, such as flocculation, viscosity increase properties, cohesiveness, surface activity, temperature resistance, shear resistance and thermal stability, etc., so it is widely used in drilling, oil production, water shutoff, profile control, acidizing, fracturing, water treatment and other fields. [0003] The synthesis of acrylamide polymers belongs to the free radical polymerization of monomers. Its ...

Claims

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Application Information

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IPC IPC(8): C08F20/56C08F4/40C08F4/04
Inventor 于志省夏燕敏宋晓芳许汇蔡红朱益兴王兰
Owner CHINA PETROLEUM & CHEM CORP