Sodium bentonite additive and preparation method thereof

A technology of sodium-based bentonite and additives, applied in chemical instruments and methods, inorganic chemistry, non-metallic elements, etc., can solve problems such as insufficient sodiumization effect and uneven sodiumization

Active Publication Date: 2017-05-17
WUHU HENGJIE NEW MATERIAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the process of sodiumization, bentonite and Na 2 CO 3 CaCO reacted to form 3 Insoluble in water, promotes the reaction to the right to form sodium bentonite, however, due to Ca 2+ Stronger potential, bentonite has preferential adsorption of Ca 2+ Therefore, the above reaction is reversible, and it is impossible to achieve 100% sodiumization, which in turn leads to the defects of uneven sodiumization and insufficient sodiumization effect

Method used

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  • Sodium bentonite additive and preparation method thereof

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preparation example Construction

[0019] The present invention also provides a preparation method of a sodium-based bentonite additive, comprising: mixing microcrystalline cellulose, sodium-salt-modified silica gel, expanded vermiculite, ammonium borate, a tackifier and polyacrylamide;

[0020] Wherein, the sodium salt is selected from sodium carbonate, sodium silicate, sodium fluoride, sodium oxalate, sodium acetate, sodium phosphate, sodium polyacrylate, sodium hydroxide, sodium chloride, sodium thiosulfate and sodium cellulose One or more; the tackifier is selected from magnesium oxide and / or magnesium hydroxide.

[0021] In the above method, the particle diameter of the silica gel modified by expanded vermiculite and sodium salt can also be selected in a wide range, but in order to make the particle diameter of the silica gel modified by expanded vermiculite and sodium salt can fully contact with calcium-based bentonite to improve For the sodiumization effect of the prepared additive, preferably, the parti...

Embodiment 1

[0029] 1) At 60°C, soak the silica gel in an aqueous solution of sodium carbonate (containing 25-30% by weight of sodium carbonate) for 3.5h, and then filter to obtain a sodium-salt-modified silica gel (measured by weighing method). contains 8% by weight of sodium carbonate);

[0030] 2) Mix microcrystalline cellulose, sodium salt modified silica gel (300 mesh in particle size), expanded vermiculite (300 mesh in particle size), ammonium borate, magnesium oxide and polyacrylamide (7 million weight average molecular weight) A sodium-based bentonite additive A1 is prepared; wherein, the weight ratio of sodium salt-modified silica gel, microcrystalline cellulose, expanded vermiculite, ammonium borate, magnesium oxide and polyacrylamide is 100:8:50:6:4:5.

Embodiment 2

[0032] 1) Soak the silica gel in an aqueous sodium carbonate solution (containing 25% by weight of sodium carbonate) for 3 hours at 50° C., and then filter to obtain a sodium-salt-modified silica gel (the silica gel modified by sodium salt contains 5 % by weight of sodium carbonate);

[0033] 2) Mix microcrystalline cellulose, sodium salt-modified silica gel (300 mesh in particle size), expanded vermiculite (300 mesh in particle size), ammonium borate, magnesium oxide and polyacrylamide (4 million weight average molecular weight) A sodium-based bentonite additive A2 is prepared; wherein, the weight ratio of sodium salt-modified silica gel, microcrystalline cellulose, expanded vermiculite, ammonium borate, magnesium oxide and polyacrylamide is 100:5:40:3:1:2.

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Abstract

The invention discloses a sodium bentonite additive and a preparation method thereof. The sodium bentonite additive comprises microcrystalline cellulose, silica gel modified by sodium salt, expanded vermiculite, ammonium borate, a tackifier and polyacrylamide, wherein the sodium salt is selected from one or more of sodium carbonate, sodium silicate, sodium fluoride, sodium oxalate, sodium acetate, phosphoric acid phosphoric acid, sodium polyacrylate, sodium hydroxide, sodium chloride, sodium thiosulfate and sodium cellulose; the tackifier is selected from magnesium oxide and / or magnesium hydroxide. Through the adoption of the sodium bentonite additive, calcium bentonite can be fully subjected to sodium treatment; in addition, the method for preparing the sodium bentonite additive is simple, and the raw materials are easy to obtain.

Description

technical field [0001] The invention relates to a bentonite additive, in particular to a sodium-based bentonite additive and a preparation method thereof. Background technique [0002] Bentonite is a kind of clay rock, also known as montmorillonite, which has strong hygroscopicity (it can absorb water equivalent to 8-20 times its own volume and expand to 30 times), and can be dispersed in a colloidal suspension in an aqueous medium. And has a certain viscosity, thixotropy and lubricity, and its blend with sediment, etc. has plasticity and cohesiveness, and has strong cation exchange capacity and adsorption capacity. Therefore, bentonite is widely used in industrial production, such as drilling mud, iron ore pellets and foundry; of course, bentonite can also be used in daily life, such as bentonite cat litter, bentonite air purifier and bentonite nutritional ceramsite. [0003] Bentonite is a non-metallic mineral with montmorillonite as the main mineral component. The montmo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B33/40
Inventor 汪元良
Owner WUHU HENGJIE NEW MATERIAL TECH CO LTD
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