A kind of preparation method of high temperature resistant high dispersibility bentonite

A high-dispersity, bentonite technology, applied in chemical instruments and methods, drilling compositions, etc., can solve the problems of poor dispersibility and poor high temperature resistance of bentonite, and achieve improved basic performance, excellent dispersibility, good carrying The effect of the ability of the cuttings

Active Publication Date: 2022-05-17
LIAONING UNIVERSITY OF PETROLEUM AND CHEMICAL TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of this invention is to provide a kind of preparation method of high temperature resistant high dispersibility bentonite, the preparation method of this high temperature resistant high dispersity bentonite is used to solve the problem of poor high temperature resistance and poor dispersibility of bentonite

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  • A kind of preparation method of high temperature resistant high dispersibility bentonite

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The preparation method of this high-temperature-resistant high-dispersibility bentonite:

[0022] Weigh 2g of hydroxyethyl cellulose and 7g of acrylamide and disperse them in 50mL of deionized water, set the stirring speed at 70r / min and the stirring time for 5min, fully stir on a magnetic stirrer, and add 44% sodium hydroxide dropwise Solution, adjust the pH value to 7; pour the stirred solution into a three-neck flask, then add 0.045g ammonium persulfate and 0.045g sodium bisulfate, set the microwave synthesis reaction, the temperature of the reaction station is 50°C, and the reaction time is The reaction time was 50min and the microwave power was 200W. The reaction was synthesized in a microwave synthesis reaction station, and nitrogen gas was introduced. During the synthesis process, magnetic stirring was maintained to obtain a transparent colloidal liquid. After standing at room temperature, the reactant was precipitated with ethanol and washed several times. ; The...

Embodiment 2

[0024] The preparation method of this high-temperature-resistant high-dispersibility bentonite:

[0025] Weigh 1g of hydroxyethyl cellulose and 4g of acrylamide and disperse them in 55mL of deionized water, set the stirring speed at 65r / min, and stir for 4min, stir fully on a magnetic stirrer, and add 44% sodium hydroxide dropwise Solution, adjust the pH value to 7; pour the stirred solution into a three-necked flask, then add 0.025g ammonium persulfate and 0.025g sodium bisulfate, set the microwave synthesis reaction, the temperature of the reaction station is 40°C, and the reaction time is The reaction time was 35min and the microwave power was 220W. The reaction was synthesized in the microwave synthesis reaction station, and nitrogen gas was introduced. During the synthesis process, magnetic stirring was maintained to obtain a transparent colloidal liquid. After standing at room temperature, the reactant was precipitated with ethanol and washed several times. ; The precipi...

Embodiment 3

[0027] The preparation method of this high-temperature-resistant high-dispersibility bentonite:

[0028] Weigh 1g of hydroxyethyl cellulose and 5g of acrylamide and disperse them in 60mL of deionized water, set the stirring speed at 60r / min and the stirring time for 5min, fully stir on a magnetic stirrer, and add 44% sodium hydroxide dropwise Solution, adjust the pH value to 7; pour the stirred solution into a three-neck flask, then add 0.03g ammonium persulfate and 0.03g sodium bisulfate, set the microwave synthesis reaction, the temperature of the reaction station is 45 ° C, the reaction time The reaction time was 45min, and the microwave power was 250W. The reaction was synthesized in a microwave synthesis reaction station, and nitrogen gas was introduced. During the synthesis process, magnetic stirring was maintained to obtain a transparent colloidal liquid. After standing at room temperature, the reactant was precipitated with ethanol and washed several times. ; The preci...

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Abstract

The invention relates to a preparation method of high-temperature-resistant and highly-dispersible bentonite. It prepares a solution by selecting a certain proportion of hydroxyethyl cellulose and acrylamide, and performs a synthetic reaction with the prepared solution with ammonium sulfate and sodium bisulfite. Dry the washed precipitate to constant weight under vacuum, purify with acetone, and finally dry the precipitate to constant weight to obtain hydroxyethyl cellulose-acrylamide polymer; disperse sodium bentonite in deionized water to obtain A dispersion liquid, and the prepared hydroxyethyl cellulose-acrylamide polymer is added to the dispersion liquid, and the hydroxyethyl cellulose-acrylamide / bentonite composite is prepared under the action of stirring and grinding. Compared with natural bentonite, the hydroxyethyl cellulose-acrylamide / bentonite composite of the present invention can still maintain a higher dynamic-to-plastic ratio at high temperatures, has a good ability to carry drill cuttings, and can be used in a shorter period of time The performance reaches a stable state with better dispersion.

Description

technical field [0001] The invention relates to the technical field of chemical raw material production technology, in particular to a preparation method of high-temperature-resistant and highly-dispersible bentonite. Background technique [0002] Bentonite ore is a kind of mineral with various uses. The main mineral composition is montmorillonite, which is a layered silicate crystal composed of two layers of Si-O tetrahedron sandwiching a layer of Al-O octahedron. It has strong Adsorption, thixotropy, dispersibility, cation exchange and other properties, and low cost, are widely used in various fields of industry, and are the most commonly used materials in oil and gas field drilling operations, but the performance of natural bentonite cannot meet the requirements of bentonite used for drilling , The rheology and fluid loss of bentonite will greatly affect the properties of drilling mud, which in turn will affect the efficiency of drilling tools and the cycle of drilling op...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/24
CPCC09K8/24
Inventor 杨双春廖松泽李磊李沼萱潘一张长青刘亚鹏贾宇航崔祥龙陈鸵
Owner LIAONING UNIVERSITY OF PETROLEUM AND CHEMICAL TECHNOLOGY
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