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Sodium bentonite and double sodium modifying method for sodium bentonite

A technology of sodium-based bentonite and calcium-based bentonite, applied in chemical instruments and methods, inorganic chemistry, silicon compounds, etc., can solve the problems of uneven sodium-based and insufficient sodium-based effect.

Active Publication Date: 2015-10-21
芜湖恒杰膨润土科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the sodium-based process, 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+ Ability, therefore, the above reaction is reversible, it is impossible to achieve 100% sodium base, which in turn leads to the defects of uneven sodium base and insufficient sodium base effect

Method used

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  • Sodium bentonite and double sodium modifying method for sodium bentonite

Examples

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Effect test

preparation example 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) Prepare additive A1; 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.

preparation example 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) 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.

preparation example 3

[0035] 1) At 70°C, soak the silica gel in an aqueous solution of sodium carbonate (containing 30% by weight of sodium carbonate) for 4 hours, and then filter to obtain a sodium-salt-modified silica gel (the silica gel modified by sodium-salt contains 10% by weight). % by weight of sodium carbonate);

[0036] 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 (10 million weight average molecular weight) Additive A3 is prepared; wherein, the weight ratio of sodium salt-modified silica gel, microcrystalline cellulose, expanded vermiculite, ammonium borate, magnesium oxide and polyacrylamide is 100:14:60:8:5:7.

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Abstract

The invention discloses sodium bentonite and a double sodium modifying method for the sodium bentonite. The method comprises the steps that 1, calcium bentonite and a sodium salt are mixed and modified in a sodium mode to manufacture first-class sodium bentonite; 2, the first-class sodium bentonite and an addition agent are mixed and inoculated to manufacture second-class sodium bentonite, wherein the addition agent comprises microcrystalline cellulose, silica gel modified by a sodium salt, expanded vermiculite, boric acid, a thickening agent and polyacrylamide; the sodium salt and the sodium salt in the silica gel modified by the sodium salt are independently selected from one or more of sodium carbonate, sodium silicate, sodium fluoride, sodium oxalate, sodium acetate, sodium phosphate, sodium polyacrylate, sodium hydroxide, sodium chloride, sodium thiosulfate and sodium cellulose; the thickening agent is selected from magnesium oxide and / or magnesium hydrate. According to the method, the calcium bentonite is fully modified into the sodium bentonite in the sodium mode, moreover, the sodium bentonite has excellent blue absorption power, a high water absorption rate and large colloid indexes, the steps are simple, and the raw materials are easy to obtain.

Description

technical field [0001] The invention relates to sodium bentonite, in particular to a sodium bentonite and a double sodium bentonite method. 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 montmorillonite struc...

Claims

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Application Information

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IPC IPC(8): C01B33/40
Inventor 汪元良
Owner 芜湖恒杰膨润土科技有限公司
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