Preparation method of high-temperature-resistant high-dispersity bentonite

A technology of high dispersibility and bentonite, applied in the direction of 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, and good portability The effect of cuttings capacity

Active Publication Date: 2021-03-26
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

Method used

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  • Preparation method of high-temperature-resistant high-dispersity bentonite

Examples

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 high-dispersity bentonite, which comprises the following steps: selecting hydroxyethyl cellulose and acrylamide in a certainratio to prepare a solution, carrying out synthetic reaction on the prepared solution, ammonium sulfate and sodium hydrogen sulfite, drying a washed precipitate in a vacuum state to constant weight,and purifying with acetone, and finally, drying a precipitate to constant weight to obtain a hydroxyethyl cellulose-acrylamide polymer. dispersing sodium bentonite into deionized water to obtain a dispersion liquid, adding the prepared hydroxyethyl cellulose-acrylamide polymer into the dispersion liquid, and stirring and grinding to obtain the hydroxyethyl cellulose-acrylamide / bentonite complex. Compared with natural bentonite, the hydroxyethyl cellulose-acrylamide / bentonite complex disclosed by the invention can still keep a relatively high dynamic-plastic ratio at a high temperature, has a good capability of carrying drilling cuttings, can achieve a stable state in performance within a shorter time, and has better dispersity.

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 Applications(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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