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A kind of modified polyacrylamide and its preparation method and polymer mud

A polyacrylamide and acrylamide technology, which is applied in the field of pile foundation wall protection materials, can solve the problems of inability to use, reduced viscosity, and general products cannot play a good role, achieving the effect of obvious space effect and increasing electronic effect.

Active Publication Date: 2022-02-08
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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  • A kind of modified polyacrylamide and its preparation method and polymer mud
  • A kind of modified polyacrylamide and its preparation method and polymer mud
  • A kind of modified polyacrylamide and its preparation method and polymer mud

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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 a modified polyacrylamide, a preparation method thereof and polymer mud, which comprises the following steps: dissolving an emulsifier, sodium α-olefin sulfonate and acrylamide in deionized water to prepare a first solution; Allyl mellitic acid ester is dissolved in deionized water to obtain the second solution; Initiator is dissolved in deionized water to obtain the third solution; Hydrophobic monomer and acrylic acid are dissolved in deionized water to obtain the fourth solution; After the first solution is deoxygenated, the second solution is added dropwise therein, and the temperature is raised to 60-65° C.; the third solution and the fourth solution are added dropwise thereinto and the reaction is continued for 5-6 hours, adjusting After the pH of the system is 7-8, the stirring reaction is continued and purified to obtain a modified polyacrylamide, wherein the process of adding the second solution, the third solution, and the fourth solution dropwise is carried out under the condition of deoxygenation. The modified polyacrylamide prepared by the preparation method has the performance of resisting salt and shearing.

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 Patents(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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