Method for preparing organophilic bentonite

A technology of bentonite and sodium bentonite, applied in the field of preparation of organic bentonite

Inactive Publication Date: 2008-05-21
NORTHEASTERN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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In this state, the application of orga

Method used

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  • Method for preparing organophilic bentonite

Examples

Experimental program
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Effect test

Embodiment 1

[0017] Weigh 200kg of 2wt% sodium montmorillonite suspension (containing 4kg of sodium montmorillonite), add 5mol of sodium dodecylbenzenesulfonate, stir well, and add 50L of 0.1MCaCl dropwise after mixing evenly 2 (5mol) solution produces precipitation, continue to stir 1 hour, centrifuge then, take the paste of lower layer, through washing, drying, be pulverized to 200 orders, be organic montmorillonite sample, yield is 3.72kg.

Embodiment 2-4

[0019] The implementation method is the same as in Example 1, changing the concentration of sodium montmorillonite suspension, sodium dodecylbenzenesulfonate and 0.1MCaCl 2 The amount of solution used, the results are shown in the table below.

[0020] Example 2

Embodiment 5

[0022] Implementation method is the same as in Example 1, changing the anionic surfactant to be sodium lauryl sulfate.

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Abstract

The invention relates to a preparation method of organic bentonite, which adopts natural sodium bentonite or artificial sodium bentonite, disperses with water, removes impurities through centrifugation, obtains sodium bentonite suspension as raw material, and adds anion with a concentration of 1 to 4 wt%. Surfactant, mixed evenly, its addition is 0.5~2mol per kilogram of Na-montmorillonite in the suspension; the addition of precipitant is 0.5~2mol, so that the anionic surfactant forms chemical adsorption and Physical adsorption becomes organic bentonite and produces hydrophobic precipitates. After separation, washing to remove ions, drying and crushing, organic bentonite is obtained. The XRD spectrum of the sample shows that the bentonite is in a completely exfoliated state and has better compatibility with organic substances.

Description

technical field [0001] The invention relates to a preparation method of organic bentonite. Background technique [0002] Bentonite is a natural clay mineral with unique mineral structure and crystalline chemical properties, and has many excellent properties. It is widely used in many fields such as drilling, petrochemical industry, building materials, casting, metallurgy, daily chemical industry and animal husbandry. , known as "universal clay mineral". Its main component is montmorillonite. my country is rich in bentonite resources, with proven reserves of 2.33 billion tons, second only to the United States, ranking second in the world. [0003] Natural bentonite is mainly calcium-based montmorillonite, and sodium-based montmorillonite is relatively less. Compared with calcium-based montmorillonite, sodium-based montmorillonite has many excellent properties, such as good suspension, high dispersion, high Therefore, it is necessary to modify the natural calcium-based bento...

Claims

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Application Information

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IPC IPC(8): C09C3/08C09C1/28
Inventor 张宝砚封禄田贾迎钢
Owner NORTHEASTERN UNIV
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