Method for preparing magnetic mesoporous composite adsorbent from natural mixed clay

A composite adsorption and clay technology, applied in chemical instruments and methods, alkali metal compounds, alkali metal oxides/hydroxides, etc., can solve the problems of activator environmental pollution, complicated purification process, water and energy consumption, etc., to achieve The effect of low cost, simple process and stable product quality

Active Publication Date: 2021-02-05
INNER MONGOLIA UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, for clay minerals with complex components, since different mineral components are symbiotic, it is difficult to significantly increase the content of a certain mineral component through purification.
Even if the content of a certain mineral component can be increased to a certain extent through multiple purifications, the required purification process is complicated, the yield is low (only 2-5%), the cost is high, water and energy consumption is high, and the activator will also cause environmental pollution

Method used

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  • Method for preparing magnetic mesoporous composite adsorbent from natural mixed clay
  • Method for preparing magnetic mesoporous composite adsorbent from natural mixed clay
  • Method for preparing magnetic mesoporous composite adsorbent from natural mixed clay

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] 10kg of natural mixed clay was subjected to air plasma ball milling for 1 hour under the conditions of discharge voltage 8KV, discharge power 1KW and rotation speed 1400rpm to improve the reactivity of clay minerals. Then, the clay mineral treated by plasma ball milling was fully mixed with 5.48 kg of ferrous chloride tetrahydrate and 23.35 kg of solid ferric chloride hexahydrate, and then rolled for 5 times to obtain a thin slice with a thickness of 1 mm. Disperse the flakes in water at a solid-to-liquid ratio of 1:10 under high-speed shearing at 5000rpm to obtain a uniform water suspension, then add 17.71kg of concentrated ammonia (28%) and 9.84kg of triethylamine, and continue heating at 80°C. After aging for 2 hours, a mixture containing magnetic clay minerals and ammonia water was obtained. Add 0.6kg sodium percarbonate, 30kg sodium metasilicate nonahydrate and 0.4kg maleic anhydride to the mixture, then add 0.9234kg magnesium hydroxide and 1.76kg calcium chloride,...

Embodiment 2

[0059] 10kg of natural mixed clay was subjected to air plasma ball milling for 2 hours under the conditions of discharge voltage 12KV, discharge power 2.5KW and rotation speed 950rpm to improve the reactivity of clay minerals. Then, the clay mineral treated by plasma ball milling was fully mixed with 3.60 kg of ferrous sulfate heptahydrate and 10.47 kg of ferric nitrate nonahydrate as solids, and then the rollers were extruded three times to obtain a thin slice with a thickness of 0.25 mm. Disperse the flakes in water at a solid-to-liquid ratio of 1:10 under high-speed shear at 5000rpm to obtain a uniform aqueous suspension, then add 10.62kg of concentrated ammonia water (28%) and 5.90kg of triethylamine, and continue heating at 80°C. After aging for 4 hours, a mixture containing magnetic clay minerals and ammonia water was obtained. Add 0.78kg of sodium percarbonate, 65kg of potassium silicate and 0.65kg of maleic anhydride to the mixture, then add 13.52kg of magnesium oxide ...

Embodiment 3

[0061] 10kg of natural mixed clay was subjected to air plasma ball milling for 2 hours under the conditions of discharge voltage 10KV, discharge power 2.0KW and rotation speed 120rpm to improve the reactivity of clay minerals. Then, the clay mineral treated by plasma ball milling was fully mixed with 2.74 kg of ferrous chloride tetrahydrate and 10.06 kg of ferric acetate solid, and then rolled for 5 times to obtain a thin slice with a thickness of 0.5 mm. Disperse the flakes in water at a solid-to-liquid ratio of 1:10 under high-speed shearing at 5000rpm to obtain a uniform water suspension, then add 14.75kg of concentrated ammonia (28%) and 1.19kg of diethylamine, and continue to heat at 80°C. After aging for 3 hours, a mixture containing magnetic clay minerals and ammonia water was obtained. Add 0.70kg sodium percarbonate, 35kg sodium silicate nonahydrate and 0.5kg maleic anhydride to the mixture, then add 7.59kg magnesium sulfate heptahydrate, 2.53kg calcium nitrate and 2.6...

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Abstract

The invention provides a method for preparing a magnetic mesoporous composite adsorbent from natural mixed clay, and belongs to the technical field of deep processing of natural non-metallic ores andpreparation of adsorption materials. According to the method, low-quality mixed clay is used as a raw material, mineral components in the clay are converted and recombined into a new magnetic mesoporous silicate material through one-step hydrothermal reaction after surface activation and magnetic functional modification, and the raw material is low in cost and wide in source; the product has strong magnetism and is easy for magnetic separation; the product is narrow in pore size distribution, the specific surface area is 513.96 m<2> / g, the adsorption capacity is 3-6 times that of magnetic clay, and the adsorbent is a high-performance adsorbent easy to separate.

Description

technical field [0001] The invention relates to a method for preparing a magnetic mesoporous composite adsorbent by using natural mixed clay, and belongs to the technical field of deep processing of natural non-metallic ore and preparation of adsorption materials. Background technique [0002] In my country's Inner Mongolia Autonomous Region and Gansu Province, there are huge reserves of red clay minerals, and its prospective reserves reach as much as 3 billion tons, and the potential application value contained therein is limitless. The results of mineral composition analysis show that this kind of red clay is composed of clay minerals such as attapulgite, illite, chlorite, and illite mixed layer clay, and paragenetic or associated minerals such as calcite, dolomite, hematite, and quartz. Due to the complex composition, darker color and poor performance of such clay minerals, the development of high value-added products is restricted, resulting in low resource utilization a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/12B01J20/28B01J20/30
CPCB01J20/12B01J20/28064B01J20/28009B01J20/3078B01J2220/4806
Inventor 王文波张寰王雪刘翔宇何庆东
Owner INNER MONGOLIA UNIVERSITY
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