A kind of hydrophobic association type amphoteric polyacrylamide and its preparation method and application

A polyacrylamide and hydrophobic association technology, which is applied in the direction of flocculation/sedimentation water/sewage treatment, etc., can solve the problem that the hydrophobic association cannot meet the needs of the market, etc., so that the product preparation process can be easily controlled and the hydrophobic association ability can be enhanced. , The effect of improving the adsorption and bridging capacity

Active Publication Date: 2020-04-21
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its hydrophobic association cannot meet the needs of the market

Method used

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  • A kind of hydrophobic association type amphoteric polyacrylamide and its preparation method and application
  • A kind of hydrophobic association type amphoteric polyacrylamide and its preparation method and application
  • A kind of hydrophobic association type amphoteric polyacrylamide and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] (1) In a three-necked flask equipped with a stirrer and a spherical condenser, add trifluoroethyl methacrylate, methacryloyloxyethyltrimethyl Ammonium Chloride, Itaconic Acid, Acrylamide, Sodium Lauryl Sulfate, and Deionized Water.

[0030] (2) Fill the reaction device with high-purity nitrogen, remove the air in the reaction device completely after 0.5 h, and then heat and stir.

[0031] (3) At 55°C, use a constant-pressure dropping funnel to add dropwise a mixed solution of ammonium persulfate and sodium bisulfite (mass ratio: 3:2) with a total mass of monomers of 1.5%. Heat to reflux for 4 hours until the reaction viscosity does not change any more, then stop the reaction.

[0032] (4) Take out the product, wash the solution with ethanol and acetone with a volume ratio of 1:1, until the solution is clear, and then extract the product with ethanol-acetone solution in Soxhlet extraction for 12 hours to remove unreacted raw material monomers As well as the surfactant,...

Embodiment 2

[0036] (1) In a three-necked flask equipped with a stirrer and a spherical condenser, add hexafluorobutyl methacrylate and dimethyl diallyl ammonium chloride at a mass ratio of 1:4:4:9:27 , itaconic acid, acrylamide, sodium lauryl sulfate, and deionized water.

[0037] (2) Fill the reaction device with high-purity nitrogen, remove the air in the reaction device completely after 1 hour, and then heat and stir.

[0038] (3) At 60°C, use a constant pressure dropping funnel to add dropwise a mixed solution of potassium persulfate and sodium bisulfite (mass ratio: 3:2) with 1.0% of the total mass of the monomers. Heat to reflux for 3 hours until the reaction viscosity does not change any more, then stop the reaction.

[0039](4) Take out the product, wash the solution with ethanol and acetone with a volume ratio of 1:1, until the solution is clear, and then extract the product with ethanol-acetone solution in Soxhlet extraction for 12 hours to remove unreacted raw material monomer...

Embodiment 3

[0041] (1) Add trifluoroethyl acrylate, dimethylaminoethyl methacrylate, and itaconic acid into a three-necked flask equipped with a stirrer and a spherical condenser at a mass ratio of 1:5:5:10:26. , acrylamide, sodium lauryl sulfate, and deionized water.

[0042] (2) Fill the reaction device with high-purity nitrogen, remove the air in the reaction device completely after 0.7h, and then heat and stir.

[0043] (3) At 65° C., a constant-pressure dropping funnel was used to drop a potassium persulfate solution of 2.0% of the total mass of the monomers. Heat to reflux for 3.5 hours until the reaction viscosity no longer changes, and stop the reaction.

[0044] (4) Take out the product, wash the solution with ethanol and acetone with a volume ratio of 1:1, until the solution is clear, and then extract the product with ethanol-acetone solution in Soxhlet extraction for 12 hours to remove unreacted raw material monomers As well as the surfactant, the washed product is put into a...

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Abstract

The invention discloses hydrophobic association type amphoteric polyacrylamide and its preparation method and an application. The hydrophobic association type amphoteric polyacrylamide is prepared through reaction of fluorine-containing monomer, cationic monomer, acrylamide, itaconic acid, deionized water and initiator, wherein the mass ratio of fluorine-containing monomer, cationic monomer, acrylamide, itaconic acid, deionized water and initiator is 1: (1-5): (1-5): (5-10): (20-30); the initiator is 0.5-3% of the total mass of monomer. The hydrophobic association type amphoteric polyacrylamide has stronger absorption ability and can better adapt to the sewage disposal or impurity removal of the industrial production field.

Description

technical field [0001] The invention belongs to the field of functional high molecular polymers, and relates to a method for synthesizing water-soluble high molecular polymers, in particular to a hydrophobic association type amphoteric polyacrylamide and its preparation method and application. Background technique [0002] Polyacrylamide has been widely used in oil fields because of its good viscosity-increasing ability, dissolving ability, filtering ability, and ability to increase drag coefficient and residual drag coefficient. It is an important oilfield chemical agent for enhancing oil recovery. However, as the temperature and salinity of producing oil reservoirs continue to increase, conventional ultra-high molecular weight polyacrylamide no longer meets the needs of production practice. On the one hand, hydrophobically modified polyacrylamide can form a network structure through the hydrophobic interaction between polymer molecules, which has a good viscosity-increasin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F220/56C08F222/02C08F220/34C08F220/24C08F226/02C02F1/56
CPCC02F1/56C08F220/56C08F222/02C08F220/34C08F220/24C08F226/02
Inventor 郭睿王映月土瑞香马兰宋博郭煜李云鹏高弯弯
Owner SHAANXI UNIV OF SCI & TECH
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