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A kind of preparation method and application of modified sepiolite

A sepiolite, modified technology, applied in chemical instruments and methods, other chemical processes, water/sludge/sewage treatment, etc. pollution and other problems, to achieve the effect of low price, shortening the time required for preparation, and less environmental pollution

Active Publication Date: 2022-06-28
POWERCHINA HUADONG ENG COPORATION LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Patent CN108325498A provides a method for synchronously recovering nitrogen and phosphorus in wastewater by modifying magnesium hydroxide sepiolite. 4+ 、PO 4 3- and Mg 2+ Magnesium ammonium phosphate (MgNH 4 PO 4 ·6H 2 O) crystal co-precipitation, to achieve the purpose of simultaneous removal of nitrogen and phosphorus pollution; but when NH 4+ 、PO 4 3- When the concentration difference is large, the precipitation effect will be affected, and the removal effect on pollutants will be greatly reduced. At the same time, the alkyl sulfonate used in the modification may cause new pollution to the environment during production and use.

Method used

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  • A kind of preparation method and application of modified sepiolite
  • A kind of preparation method and application of modified sepiolite

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Embodiment 1

[0034] A preparation method of modified sepiolite permeable brick, comprising the steps of:

[0035] (1) Purchasing natural sepiolite is a raw material, and the natural sepiolite is pulverized into particles with a particle diameter of 1 cm;

[0036] (2) At room temperature, prepare 5mol / L hydrochloric acid, mix 1kg of sepiolite and 6kg of the aforementioned hydrochloric acid evenly, set the microwave to 250W, and modify for 1h;

[0037] (3) Separate sepiolite by gauze filtration, rinse with tap water until neutral, and dry to semi-dry at 80-100°C;

[0038] (4) Mix 50 g of sodium chloride, 25 g of zinc sulfate, 68 g of sucrose, and 1000 g of water to make a mixed salt solution.

[0039](5) Immerse 210g of acid-modified sepiolite in 680g of mixed salt solution, under the assistance of microwave (250W~350W), stir and modify for 3h, then filter the semi-modified sepiolite with gauze, and put it in the ventilation air-dried to half-dried;

[0040] (6) Putting the semi-modified ...

Embodiment 2

[0046] A preparation method of a modified sepiolite water-permeable purification cage, comprising the steps of:

[0047] (1) taking natural sepiolite as raw material, pulverizing natural sepiolite into particles with a particle diameter of 1 cm;

[0048] (2) At room temperature, prepare 5mol / L hydrochloric acid, mix 1kg of sepiolite with 5kg of the aforementioned hydrochloric acid, set the microwave to 300W, and modify for 1h;

[0049] (3) Separate sepiolite by gauze filtration, rinse with tap water until neutral, and dry to semi-dry at 80-100°C;

[0050] (4) Sodium chloride 50g, zinc sulfate 20g, sucrose 70g, water 1000g mix uniformly and make mixed salt solution;

[0051] (5) Submerge 200g of acid-modified sepiolite in 600g of mixed salt solution, under the assistance of microwave (250W~350W), stir and modify for 3h, and separate the semi-modified sepiolite by gauze filtration;

[0052] (6) drying the semi-modified sepiolite to semi-dry, putting it into a 300°C muffle furn...

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Abstract

The invention discloses a method for preparing modified sepiolite, which comprises the following steps: S1, taking granular natural sepiolite as a raw material, and after acid modification treatment, acid-modified sepiolite is obtained; S2, taking The acid-modified sepiolite is submerged in a mixed salt solution, modified under the assistance of microwaves, and separated by filtration to obtain semi-modified sepiolite; S3, roasting the semi-modified sepiolite at a certain temperature to obtain The modified sepiolite of the present invention. The invention comprehensively improves the adsorption capacity of nitrogen, phosphorus, pesticides and other pollutants, and at the same time reduces the cost required for preparation, shortens time consumption, and reduces pollution generated during production and use.

Description

technical field [0001] The invention relates to the technical field of new materials for water pollution control, in particular to a preparation method and application of modified sepiolite. Background technique [0002] Sepiolite is a layer chain structure fibrous hydrous magnesium silicate natural mineral. Its crystal structure model belongs to chain and layered transitional structure, which is composed of two layers of silicon-oxygen tetrahedron sandwiching a layer of magnesium-oxygen octahedron, with water molecules and exchangeable cations. This special structure makes sepiolite have good adsorption and ion exchange. Sepiolite is cheap and comes from a wide range of sources, but natural sepiolite has low grade, contains more impurities, has small channels, small specific surface area, poor thermal stability, and poor adsorption effect when used directly. Therefore, modifying natural sepiolite to enhance its adsorption performance is a research hotspot in the field of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/12B01J20/28B01J20/30C02F1/28C02F101/10C02F101/16C02F101/30C02F101/38
CPCB01J20/12B01J20/28054B01J20/28057C02F1/281C02F2101/105C02F2101/16C02F2101/38C02F2101/30
Inventor 傅菁菁盛晟陈奋飞
Owner POWERCHINA HUADONG ENG COPORATION LTD
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