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Method for preparing inorganic gel of bentonite

A technology of inorganic gel and bentonite, applied in the direction of inorganic chemistry, chemical instruments and methods, non-metallic elements, etc., can solve the problems of large one-time investment, unfavorable large-scale production, and inability to apply, and achieve improved consistency and thixotropic performance , Conducive to large-scale production, to achieve the effect of large-scale production

Active Publication Date: 2007-10-10
湖北三鼎科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The production process of this method needs to be carried out under acidic conditions, which requires high equipment and is not conducive to long-term large-scale production
Chinese patent CN1103130A discloses a method for preparing bentonite gel by mixing bentonite, sodium silicate, polyacrylamide, and sulfonated phenolic resin. The inorganic gel prepared by this method is mainly used in industrial fields such as oil field drilling, but its additive poly Acrylamide and sulfonated phenolic resins do not meet food hygiene requirements and cannot be used in food, medicine and other fields
[0010] 1. High requirements for production conditions, high energy consumption, and potential safety hazards in large-scale production
[0011] 2. High requirements for production equipment and large one-time investment
[0012] 3. The performance of the product is average, and the application field is narrow

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0029] Use Zhejiang Anji bentonite filter cake with a montmorillonite content of more than 80% as raw material, with a water content of 40% to 80%, add 6% of the filter cake weight of sodium carbonate and 13% of urea powder, in a twin-screw extruder After mixing and modifying for 1.2 hours, the modified material was dried at 105° C., crushed through a 300-mesh sieve, and mixed with sodium carboxymethyl cellulose of 25% by weight of the dried material.

Embodiment 2

[0031] Zhejiang Anji bentonite filter cake with a montmorillonite content greater than 80% was used as raw material, and 2% sodium carbonate and 20% urea powder were added by weight of the filter cake, and mixed and modified in a twin-screw extruder for 2 hours. The modified material was dried at 130° C., crushed through an 80-mesh sieve, and mixed with xanthan gum having a weight of 30% of the dried material.

Embodiment 3

[0033] Use Zhejiang Anji bentonite filter cake with a montmorillonite content greater than 80% as raw material, add 8% sodium carbonate by weight of the filter cake material, mix and modify in a kneader for 1 hour, and dry the modified material at 190°C. After being crushed through a 325-mesh sieve, it is mixed with 4% magnesium oxide by weight of the dried material.

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PUM

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Abstract

This invention discloses a method for preparing bentonite inorganic gel. The method comprises: mixing bentonite filter cake, sodium salt powder and urea powder to obtain a mixture, drying, pulverizing, and uniformly mixing with gelating agent to obtain bentonite inorganic gel. The sodium salt powder is one or more of sodium carbonate, sodium fluoride and sodium silicate. The addition amounts of sodium salt powder and urea powder are 2-10 wt. % and 0-20 wt. % of bentonite filter cake, respectively. The gelating agent is one or more of glues and cellulose substances, and the addition amount is 1-30 wt. % of the mixture. The method has such advantages as simple process, high efficiency, and high product performance, no toxicity and no harm, and is suitable for mass production.

Description

technical field [0001] The invention relates to a preparation method of bentonite inorganic gel, which belongs to the technical field of bentonite processing. Background technique [0002] Inorganic gel is a high-tech product of fine chemical industry. It is a special silicate with layered, chain and frame structure composed of silicon, magnesium, aluminum, oxygen, sodium and other inorganic elements. It is non-toxic, tasteless and pure natural. Inorganic gels are valuable because of their ability to swell in water and bring beneficial rheological properties to aqueous systems. [0003] Bentonite inorganic gel is a colloidal product obtained by refining 3-octahedral magnesium saponite and special 2-octahedral montmorillonite. The unique layered magnesium aluminum silicate structure makes it highly hydrophilic and can form non-Newtonian thixotropic gels in aqueous solution. This mineral inorganic gel has an important influence on the stability of the s...

Claims

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Application Information

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IPC IPC(8): C01B33/40C01B33/44
Inventor 严春杰曾路谌刚寿瑾枫
Owner 湖北三鼎科技有限公司
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