Magnetic composite bentonite and preparation method of same

A technology of bentonite and magnetism, which is applied in the field of modification and preparation of bentonite for water treatment, can solve the problems of fine bentonite particles, difficulties in practical application, and increased amount of sludge, and achieves improved superparamagnetism, simple and feasible preparation process, and low preparation cost Effect

Inactive Publication Date: 2017-08-29
句容康泰膨润土有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the fine particles of bentonite and single function, it is easy to cause the increase of sludge and cause secondary pollution, which brings many difficulties to practical application.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A magnetic composite bentonite, prepared from the following raw materials in parts by weight: 40-50 parts of bentonite, 20-25 parts of iron oxide, 2-3 parts of ferric chloride, 2-3 parts of iron sulfate, 2-3 parts of polyaluminum sulfate 3 parts, 2-3 parts of activated carbon, 0.1-0.3 parts of dodecyl quaternary ammonium salt.

[0022] A preparation method of magnetic composite bentonite, comprising:

[0023] S1. Add bentonite, ferric oxide, ferric chloride and ferric sulfate to ethylene glycol at 65° C. under nitrogen, and stir for 2 hours;

[0024] S2. Put the mixed liquid obtained in step 1 in a polytetrafluoroethylene reactor, and react at 180° C. for 10 hours to obtain a black solid;

[0025] S3. Wash the black solid with distilled water, add activated carbon, polyaluminum sulfate, and dodecyl quaternary ammonium salt solution, and stir for 12 hours to obtain magnetic bentonite;

[0026] S4. Drying the magnetic bentonite at 70° C. and pulverizing it to 300 mesh t...

Embodiment 2

[0029] A magnetic composite bentonite, prepared from the following raw materials in parts by weight: 40-50 parts of bentonite, 20-25 parts of iron oxide, 2-3 parts of ferric chloride, 2-3 parts of iron sulfate, 2-3 parts of polyaluminum sulfate 3 parts, 2-3 parts of activated carbon, 0.1-0.3 parts of dodecyl quaternary ammonium salt.

[0030] A preparation method of magnetic composite bentonite, comprising:

[0031] S1. Add bentonite, ferric oxide, ferric chloride, and ferric sulfate to ethylene glycol at 75°C under inert gas conditions, and stir for 1 hour;

[0032] S2. Put the mixed liquid obtained in step 1 in a polytetrafluoroethylene reactor, and react at 200° C. for 8 hours to obtain a black solid;

[0033] S3. Wash the black solid with distilled water, add activated carbon, polyaluminum sulfate, and dodecyl quaternary ammonium salt, and stir for 24 hours to obtain magnetic bentonite;

[0034] S4. Drying the magnetic bentonite at 90° C. and pulverizing it to 500 mesh t...

Embodiment 3

[0037] A magnetic composite bentonite, prepared from the following raw materials in parts by weight: 50-60 parts of bentonite, 25-30 parts of iron oxide, 3-4 parts of ferric chloride, 2-3 parts of iron sulfate, 2-3 parts of polyaluminum sulfate 3 parts, 3-4 parts of activated carbon, 0.3-0.8 parts of dodecyl quaternary ammonium salt.

[0038] A preparation method of magnetic composite bentonite, comprising:

[0039] S1. Add bentonite, ferric oxide, ferric chloride and ferric sulfate to ethylene glycol at 65° C. under nitrogen, and stir for 2 hours;

[0040] S2. Put the mixed solution obtained in step 1 in a polytetrafluoroethylene reactor, and react at 180° C. for 10 hours to obtain a black solid;

[0041] S3. Wash the black solid with distilled water, add activated carbon, polyaluminum sulfate, and dodecyl quaternary ammonium salt solution, and stir for 12 hours to obtain magnetic bentonite;

[0042] S4. Drying the magnetic bentonite at 70° C. and pulverizing it to 300 mesh...

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PUM

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Abstract

In one embodiment, the invention discloses magnetic composite bentonite and a preparation method of same. The invention relates to the field of modification and preparation of bentonite for water treatment. The magnetic composite bentonite is prepared from, by weight, 40-70 parts of bentonite, 20-40 parts of ferric oxide, 2-5 parts of ferric chloride, 2-5 parts of ferric sulfate, 2-5 parts of polyaluminum sulfate, 2-5 parts of active carbon, and 0.1-1 part of a cationic surfactant. The preparation method is simple and available. The magnetic composite bentonite can remove organic pollutants in water well and has excellent settling separation effect.

Description

technical field [0001] The invention relates to the field of modification and preparation of bentonite for water treatment, in particular to a magnetic composite bentonite and a preparation method thereof. Background technique [0002] Bentonite belongs to layered aluminosilicate clay minerals, which can expand between layers and have large cation exchange capacity, and its main component is montmorillonite. Bentonite is an excellent and economical adsorbent widely used in wastewater treatment, and is usually used to treat wastewater containing phosphorus, organic pollutants, heavy metals and dyes. Bentonite has a permanent negative charge due to the unequal cation replacement between layers, and has a large internal and external area, which makes it have a high ion exchange capacity and strong adsorption capacity. Therefore, it is very suitable for the treatment of industrial wastewater. At the same time, as an adsorption medium, bentonite has abundant reserves, low price,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/22B01J20/30B01J20/28C02F1/28C02F1/52C02F101/30
CPCB01J20/22B01J20/0229B01J20/0248B01J20/0281B01J20/0288B01J20/06B01J20/12B01J20/20B01J20/28009B01J2220/4806B01J2220/4812C02F1/281C02F1/285C02F1/5236C02F2101/30
Inventor 刘新兵刘长淼刘玉林
Owner 句容康泰膨润土有限公司
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