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Method for preparing superfine aluminium silicate by bentonite

A technology of ultra-fine aluminum silicate and bentonite, which is applied in the directions of aluminum silicate and silicate, can solve the problems such as the method for preparing ultra-fine aluminum silicate, etc., and achieve the effect of reducing energy consumption and production cost.

Inactive Publication Date: 2010-08-18
黄山市恒佳科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] So far, there is no relevant report on the method of preparing superfine aluminum silicate using bentonite as raw material

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Embodiment 1, the preparation of superfine aluminum silicate, the present embodiment is carried out according to the following steps:

[0036] 1. In the bentonite powder ore with a particle size of 30 μm, add a sulfuric acid solution with a concentration of 55 wt% according to the weight ratio of bentonite powder and acid solution at 1:2.5, react at 105°C for 2.5 hours, and filter to obtain an acid leaching filter cake and acid leaching filtrate, the acid leaching filter cake is washed to neutral with clear water, and the acid leaching filter cake, acid leaching filtrate and lotion are collected respectively;

[0037] 2. After mixing the acid leaching filtrate and lotion obtained in step 1, add a sodium hydroxide solution with a concentration of 6% by weight to make the pH of the solution 3.2; then add high manganese with a weight ratio of 0.7: 1 Potassium acid potassium and manganese sulfate, the addition of which is 1.2% of the weight of the filtrate, stirred and reac...

Embodiment 2

[0040] Embodiment 2, the preparation of superfine aluminum silicate, this embodiment is carried out according to the following steps:

[0041] 1. In the bentonite powder ore with a particle size of 75 μm, add a hydrochloric acid solution with a concentration of 18wt% according to the weight ratio of bentonite powder and acid solution at 1:5.5, react at 85°C for 5 hours, and filter to obtain an acid leaching filter cake and acid leaching filtrate, the acid leaching filter cake is washed to neutral with clear water, and the acid leaching filter cake, acid leaching filtrate and lotion are collected respectively;

[0042] 2. After mixing the acid leaching filtrate and washing liquid obtained in step 1, adding a sodium hydroxide solution with a concentration of 28% by weight, so that the pH of the solution is 4; Potassium acid potassium and manganese sulfate, the addition of which is 3% of the weight of the filtrate, stirred and reacted at room temperature for 0.5 hours, all the ir...

Embodiment 3

[0045] Embodiment 3, the preparation of superfine aluminum silicate, this embodiment is carried out according to the following steps:

[0046] 1. In the bentonite powder ore with a particle size of 50 μm, add a sulfuric acid solution with a concentration of 40wt% according to the weight ratio of bentonite ore powder and acid solution at a weight ratio of 1:4, react at 95°C for 4 hours, and filter to obtain an acid leaching filter cake and acid leaching filtrate, the acid leaching filter cake is washed to neutral with clear water, and the acid leaching filter cake, acid leaching filtrate and lotion are collected respectively;

[0047] 2. After mixing the acid leaching filtrate and lotion obtained in step 1, add a sodium hydroxide solution with a concentration of 20% by weight to make the pH of the solution 3.5; then add the high manganese with a weight ratio of 0.7:1 Potassium acid potassium and manganese sulfate, the addition of which is 2% of the weight of the filtrate, stirr...

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Abstract

The invention relates to a method for preparing superfine aluminium silicate by bentonite, which takes the mineral powder of the bentonite as a raw material and comprises the steps of pickling, purifying, alkaline leaching, synthesizing, washing and drying. In the pickling step, acid liquor is added according to the weight ratio of 1:2.5 to 5.5 of the mineral powder of the bentonite to the acid liquor, and the mineral powder of the bentonite and the acid liquor react for 2 to 6 hours at the temperature of 80 to 105 DEG C; in the purifying step, potassium permanganate and manganese sulfate which have the weight ratio of 0.7:1 are added after the pH value of pickling filtrate is regulated to 3 to 4 by using a sodium hydroxide solution, the adding quantity of the potassium permanganate and the manganese sulfate is 1 to 3 percent of the weight of the pickling filtrate, and an aluminium salt solution is obtained by processing; and in the alkaline leaching step, the sodium hydroxide solution is added into a pickling filter cake according to the weight ratio of 1:2.5 to 5.0 of the pickling filter cake to the sodium hydroxide solution, and the pickling filter cake and the sodium hydroxide solution react below the boiling temperature to obtain water glass. In the synthesizing step, the aluminium salt solution and a water glass solution react to obtain the superfine aluminium silicate by separating, washing and drying. The invention has the characteristics of low production cost, low energy consumption and good economic benefit.

Description

technical field [0001] The invention relates to the technical field of deep processing and comprehensive utilization of bentonite and preparation of inorganic salts, and more specifically relates to a method for preparing superfine aluminum silicate by using bentonite as a raw material. Background technique [0002] Bentonite is an aluminosilicate mineral, its main mineral component is montmorillonite, and its chemical formula is Al 2 o 3 4SiO2 2 ·3H 2 O. In addition to aluminum and silicon, natural bentonite also contains a small amount of Na 2 O, K 2 O, CaO, MgO, Fe 2 o 3 and other components. my country's bentonite mineral resources are very rich, and the proven reserves are in the forefront of the world. It is a mineral resource with great comprehensive development and utilization value. [0003] Ultra-fine aluminum silicate is a new type of artificially synthesized functional silicate product, which has the characteristics of fine particles, good suspension and...

Claims

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Application Information

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IPC IPC(8): C01B33/26
Inventor 傅建萍于少明金立新傅建彬陈国顺
Owner 黄山市恒佳科技有限公司
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