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Amine lactone type amphoteric high polymer emulsion as well as preparation method and application thereof

A technology of amphoteric polymers and polymer emulsions, applied in separation methods, drilling compositions, chemical instruments and methods, etc., can solve problems such as low molecular weight and inability to increase oil recovery, and achieve simple operation and convenient application , easy to disperse effect

Active Publication Date: 2012-05-02
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In summary, in the prior art, the commonly used zwitterionic polymers are mostly zwitterionic polymers containing cationic chain segments and anionic chain segments, and their viscosity is greatly affected by the degree of salinity; while they have inverse polyelectrolyte properties, The zwitterionic polymer with no electrical charge in the polymer molecule as a whole has good salt resistance, but the pure zwitterionic polymer reported in the existing literature, such as poly(AM-co-DMPS) (that is, acrylamide and formazan Acryloyloxyethyl-N, N'-dimethyl-N-propanesulfonic acid amine salt copolymer), the molecular weight is not high, and it cannot be used as a salt-resistant polymer oil displacement agent for offshore oilfields to enhance oil recovery

Method used

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  • Amine lactone type amphoteric high polymer emulsion as well as preparation method and application thereof
  • Amine lactone type amphoteric high polymer emulsion as well as preparation method and application thereof
  • Amine lactone type amphoteric high polymer emulsion as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] Water phase: Weigh 28g of acrylamide and 3g of zwitterionic monomer DEPS (methacryloyloxyethyl-N, N'-diethyl-N-propanesulfonic acid amine salt), dissolve them in 40g of deionized water, add Contain 5 g of aqueous solution of complexing agent EDTA (ethylenediaminetetraacetic acid disodium salt) at a certain concentration, and pass nitrogen gas for 20 minutes. Oil phase: Weigh 4.5g of a compound emulsifier with an HLB value of 4.5, and mix it with 30g of white oil evenly. Under high-speed stirring, slowly add the water phase to the oil phase dropwise, and stir well to form a uniform W / O emulsion. Nitrogen deoxygenation 20min. Add 2 mL of an aqueous solution of a reducing agent and 2 mL of an aqueous solution of an oxidizing agent to the above-mentioned emulsion successively dropwise, raise the temperature to 30° C., and continue the reaction for 1 to 4 hours to obtain a milky white uniform viscous amphoteric polymer emulsion of the amino lactone type. The amphoteric pol...

Embodiment 2

[0048] Water phase: Weigh 28g of acrylamide and 6g of zwitterionic monomer (DEPS), dissolve in 40g of deionized water, add 5g of aqueous solution containing a certain concentration of complexing agent EDTA, and pass nitrogen gas for 20min. Oil phase: Weigh 4.5g of a compound emulsifier with an HLB value of 4.5, and mix it with 30g of white oil evenly. Under high-speed stirring, slowly add the water phase to the oil phase dropwise, and stir well to form a uniform W / O emulsion. Nitrogen deoxygenation 20min. Add 2 mL of an aqueous solution of a reducing agent and 2 mL of an aqueous solution of an oxidizing agent to the above-mentioned emulsion successively dropwise, raise the temperature to 30° C., and continue the reaction for 1 to 4 hours to obtain a milky white uniform viscous amphoteric polymer emulsion of the amino lactone type. The amino lactone type amphoteric polymer powder obtained after ethanol precipitation and drying has an intrinsic viscosity of 14.2 dL / g.

Embodiment 3

[0050] Water phase: Weigh 28g of acrylamide and 6g of zwitterionic monomer (DEPS), dissolve them in 40g of deionized water, add 5g of an aqueous solution containing a certain concentration of complexing agent EDTA and 2g of an aqueous solution containing a certain concentration of a molecular weight regulator, and blow nitrogen for 20 minutes . Oil phase: Weigh 4.5g of a compound emulsifier with an HLB value of 4.5, and mix it with 30g of white oil evenly. Under high-speed stirring, slowly add the water phase to the oil phase dropwise, and stir well to form a uniform W / O emulsion. Nitrogen deoxygenation 20min. Add 2 mL of an aqueous solution of a reducing agent and 2 mL of an aqueous solution of an oxidizing agent to the above-mentioned emulsion successively dropwise, raise the temperature to 30° C., and continue the reaction for 1 to 4 hours to obtain a milky white uniform viscous amphoteric polymer emulsion of the amino lactone type. The amino lactone amphoteric polymer po...

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Abstract

The invention discloses an amine lactone type amphoteric high polymer emulsion as well as a preparation method and application thereof. The amine lactone type amphoteric high polymer emulsion is characterized in that a sulfobetaine type amphoteric ionic monomer and more than one acrylamide nonionic monomer are copolymerized by adopting an inverse emulsion polymerizing method to obtain a high polymer with nonionic copolymer characteristic and salt tackifying effect. Preferably, white oil is used as a dispersion phase, and the HLB (Hydrophile-Lipophile Balance) value of an emulsifying agent is 4.5-5.5. The amine lactone type amphoteric high polymer emulsion prepared by adopting an emulsion polymerization mode has the advantages of high solid content, high dissolvability and relative uniformity in relative molecular mass distribution. The polymer emulsion is easy to disperse and dissolve in fresh water and high-salinity saline water and is very convenient to apply.

Description

technical field [0001] The invention relates to an emulsion polymer used in oil field exploitation, in particular to an amino lactone type amphoteric high molecular polymer emulsion with the property of increasing the viscosity of salt water, as well as its preparation method and application. Background technique [0002] Amphoteric polymers are polymers that contain both positive and negative charge groups on the molecular chain, also known as amphoteric polyelectrolytes. Because of their unique solution effects, they can be used in many fields such as new industrial materials and additives, such as oil field mining, Water treatment, water-absorbing materials, medicine, etc. [0003] Amphoteric polymers are roughly divided into two categories: one is acid-base groups on the same chain link, called polymeric betains; the other is acid-base groups on different chain links, according to the unit The nature of the body unit can be divided into strong acid and strong base type,...

Claims

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Application Information

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IPC IPC(8): C08F220/56C08F220/38C08F220/60C08F2/32C09K8/588C09K8/035C02F1/40A61K47/32
Inventor 王琳苏长明李家芬杨小华王显光石秉忠钱晓琳
Owner CHINA PETROLEUM & CHEM CORP
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