Modified polyacrylamide and preparation method thereof, and polymer slurry

A technology of polyacrylamide and acrylamide, which is applied in the field of pile foundation retaining wall materials, can solve the problems that general products cannot play a good role, do not have high salinity geological research, and reduce viscosity, so as to improve salt resistance and shear resistance Performance, hole size uniformity, and the effect of increasing the electronic effect

Active Publication Date: 2020-11-13
CHINA TIESIJU CIVIL ENG GRP CO LTD +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] At present, CN1307280C discloses a polyalcohol biopolymer saturated brine drilling fluid, which is applied to special oil field drilling construction with gypsum-salt layer development, many faults, and complex formation changes, but it has not been studied for high salinity geology
CN107382128A discloses an anti-slump polymer mud powder and its preparation method and application. The polymer mud powder can be applied to water-sensitive geology, but cannot be used under high salinity conditions
The above inventions are all dedicated to improving the quality and efficiency of pile foundation construction, but none of them involve the research on pile foundation construction of high salinity geology. The viscosity of traditional polymer mud will be greatly reduced in 100g / L salinity water quality, and at the same time Under the strong shear of the drilling rig, the viscosity drops even up to 50%, so that the general products cannot play a good role

Method used

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  • Modified polyacrylamide and preparation method thereof, and polymer slurry
  • Modified polyacrylamide and preparation method thereof, and polymer slurry
  • Modified polyacrylamide and preparation method thereof, and polymer slurry

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preparation example Construction

[0030] The first aspect of the present invention discloses a preparation method of modified polyacrylamide, comprising the following steps:

[0031] dissolving the emulsifier, sodium α-alkenyl sulfonate and acrylamide in deionized water, mixing, stirring and dispersing to obtain the first solution in the state of emulsion;

[0032] dissolving allyl mellitic acid ester in deionized water to obtain a second solution;

[0033] The initiator is dissolved in deionized water to obtain a third solution;

[0034] The hydrophobic monomer and acrylic acid are dissolved in deionized water to obtain a fourth solution;

[0035] After the first solution is deoxygenated, the second solution is added dropwise to it, and the temperature is raised to 60-65°C; the third solution and the fourth solution are added dropwise to it at the same time, and the reaction is continued for 5-6h, After adjusting the pH of the system to 7-8, continue to stir and react, purify, and obtain modified polyacryla...

Embodiment 1

[0052] Preparation of modified polyacrylamide: Add 12.6 parts of mellitic acid and 45 parts of acryl alcohol into the flask and stir thoroughly, then slowly add 0.29 parts of concentrated sulfuric acid dropwise, heat the mixture to 130°C, and react for 3 hours. After the reaction, neutralize the unreacted sulfuric acid with 3.2 parts of calcium hydroxide, and filter out the precipitate. Finally, the filtrate was concentrated to obtain allyl mellitic acid ester.

[0053] Take 1 part of sodium lauryl sulfate, 0.2 part of sodium α-alkenyl sulfonate, 18 parts of acrylamide, add 71.87 parts of deionized water and mix them, then stir and disperse quickly, so that the solution is in the state of emulsion, and then deoxygenate in nitrogen. Under protection, add 0.6 parts of allyl mellitic acid ester to 10 parts of deionized water to form a solution, slowly add it dropwise into the system, and raise the temperature to 60-65°C, and at the same time add 0.53 parts of potassium persulfate...

Embodiment 2

[0056] Preparation of modified polyacrylamide: Add 12.6 parts of mellitic acid and 40 parts of acrylic alcohol into the flask and stir thoroughly, then slowly add 0.29 parts of concentrated sulfuric acid dropwise, heat the mixture to 130°C, and react for 3 hours. After the reaction, neutralize the unreacted sulfuric acid with 3.2 parts of calcium hydroxide, and filter out the precipitate. Finally, the filtrate was concentrated to obtain allyl mellitic acid ester.

[0057] Take 0.8 parts of sodium lauryl sulfate, 0.16 parts of sodium α-alkenyl sulfonate, 18 parts of acrylamide and add 71.65 parts of deionized water to mix and then stir and disperse quickly to make the solution in an emulsion state, and then pass nitrogen to remove oxygen. Under protection, add 0.72 parts of allyl mellitic acid ester to 10 parts of deionized water to form a solution, slowly add it dropwise into the system, and raise the temperature to 60-65°C, and add dropwise at the same time with a mass ratio ...

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Abstract

The invention discloses modified polyacrylamide and a preparation method thereof, and polymer slurry. The preparation method comprises the following steps: dissolving an emulsifier, sodium alpha-olefin sulfonate and acrylamide in deionized water to prepare a first solution; dissolving allyl benzene hexacarboxylate in deionized water to prepare a second solution; dissolving an initiator in deionized water to prepare a third solution; dissolving a hydrophobic monomer and acrylic acid in deionized water to prepare a fourth solution; removing oxygen from the first solution, dropwise adding the second solution into the first solution, and carrying out heating to 60-65 DEG C; dropwise adding the third solution and the fourth solution at the same time and then conducting a reaction for 5-6 h; andadjusting the pH of a system to be 7-8, then continuing the stirring reaction and performing purification to obtain modified polyacrylamide, wherein the process of dropwise adding the second solution, the third solution and the fourth solution is conducted under a deoxygenization condition. The modified polyacrylamide prepared by using the preparation method has salt resistance and shear resistance.

Description

technical field [0001] The invention belongs to the field of pile foundation wall protection materials, and in particular relates to a modified polyacrylamide and a preparation method thereof, and also relates to a polymer mud. Background technique [0002] Bentonite slurry is a suspension system in which clay is dispersed in the form of colloidal particles in a treatment agent solution. Due to its shortcomings such as strong alkalinity, high heavy metal content, and high solid content that cannot be dried naturally, it cannot meet the requirements of on-site civilized construction. In order to solve the many deficiencies of traditional bentonite mud wall materials, more and more technical personnel pay more and more attention to environmentally friendly polymer mud. But by water salinity (Na + , M copies 2+ , Ca 2+ ), the viscosity of the polymer mud is reduced due to the electrostatic interaction of anions and cations, the colloidal structure is destroyed, and the wall ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/56C08F228/02C08F220/06C08F220/18C08F218/16C08L33/26C08K5/42C08L33/20
CPCC08F220/56C08K5/42C08L33/26C08F228/02C08F220/06C08F220/1818C08F218/16C08L33/20
Inventor 陈钱宝黄海赵杰石涛黄珊珊郭桓闫骐隆温健峰锁超臧凯姚二杨程从亮张峰君尤业字
Owner CHINA TIESIJU CIVIL ENG GRP CO LTD
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