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Kieselguhr-based particle adsorbent and preparation and modification method thereof

A particle adsorbent, diatomite technology, applied in chemical instruments and methods, adsorbed water/sewage treatment, other chemical processes, etc., to achieve the effect of improving surface properties, simple method, and easy regeneration

Inactive Publication Date: 2015-03-25
NORTH CHINA UNIV OF WATER RESOURCES & ELECTRIC POWER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, it is mainly used to produce filter aids, adsorbents, catalysts and pesticide carriers, functional fillers, water treatment agents, etc., but diatomite powder is subject to many restrictions in application, such as the existence of powdery adsorption in practical applications is difficult to achieve The dynamic adsorption is easy to cause blockage, so that the adsorption cannot be carried out, and there are problems such as solid-liquid separation and regeneration difficulties in static adsorption, and the use cost increases, and even leads to secondary pollution.

Method used

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  • Kieselguhr-based particle adsorbent and preparation and modification method thereof
  • Kieselguhr-based particle adsorbent and preparation and modification method thereof
  • Kieselguhr-based particle adsorbent and preparation and modification method thereof

Examples

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Effect test

Embodiment 1

[0025] The diatomite-based granular adsorbent is made of the following raw materials in weight ratio: 79g diatomite, 6g kaolin, 4g feldspar, 3g sodium chloride, 2g montmorillonite, 6 sodium carbonate, 5 carbon powder (pore forming agent, Add), oleic acid 0.6, water 16mL.

[0026] When preparing, weigh the above various raw materials in proportion, mix the raw materials, and dry grind to D 50 = 5 μm, molded in a rolling ball molding machine for 10 minutes, and calcined at 980 ° C for 2 hours to obtain a diatomite-based particle adsorbent.

[0027] The method for modifying the diatomite-based granular adsorbent comprises the following steps: (1) placing the diatomite-based granular adsorbent in an ultrasonic oscillator, ultrasonically cleaning it with tap water, and then drying it at 105°C for use; (1 ) with 0.5mol / L FeCl 3 Mix 10mL of the solution with the diatomite-based granular adsorbent treated in the previous step, stir well, then raise the temperature to 30°C, adjust th...

Embodiment 2

[0032] The diatomite-based granular adsorbent is made of the following raw materials in weight ratio: 86g diatomite, 4g kaolin, 2g quartz, 5g sodium chloride, 3g magnesium carbonate, 3 calcium carbonate, 3 water-soluble starch, 1g magnesium stearate , water 18mL.

[0033] When preparing, weigh the above various raw materials in proportion, mix the raw materials, and dry grind to D 50 = 8 μm, molded in a rolling ball molding machine for 20 minutes, and calcined at 1040 ° C for 2 hours to obtain a diatomite-based particle adsorbent.

[0034] The method for modifying the diatomite-based granular adsorbent comprises the following steps: (1) placing the diatomite-based granular adsorbent in an ultrasonic oscillator, ultrasonically cleaning it with tap water, and then drying it at 105°C for use; (2) ) with 0.3mol / L FeCl 3 Mix 10mL of the solution with the diatomite-based granular adsorbent treated in the previous step, stir well, then raise the temperature to 25°C, adjust the solu...

Embodiment 3

[0036]The diatomite-based granular adsorbent is made of raw materials in the following weight ratio: diatomite: 75g, kaolin 10g, feldspar 3g, sodium carbonate 6g, sodium chloride 3g, magnesium carbonate 3g, coal powder 5, carbon powder 3, Sodium oxalate 0.6, water 14mL.

[0037] When preparing, weigh the above raw materials in proportion, weigh the various raw materials in proportion, mix the raw materials, and dry grind them to D 50 =10 μm, molded in a rolling ball molding machine for 15 minutes, and calcined at 920°C for 2 hours to obtain a diatomite-based particle adsorbent.

[0038] The method for modifying the diatomite-based granular adsorbent comprises the following steps: (1) placing the diatomite-based granular adsorbent in an ultrasonic oscillator, ultrasonically cleaning it with tap water, and then drying it at 105°C for use; (2) ) with 1mol / L FeCl 3 Mix 10mL of the solution with the diatomite-based granular adsorbent treated in the previous step, stir well, then ...

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Abstract

The invention belongs to the technical field of kieselguhr inorganic materials, and relates to kieselguhr-based particle adsorbent and a preparation method of the kieselguhr-based particle adsorbent. The kieselguhr-based particle adsorbent is made of the following raw materials: kieselguhr, kaolin, sintering aids, pore-forming agents, dispersing agents and water with the weight ratio of 72-90:2-12:1-16:1-18:0.01-2:12-45. The prepared kieselguhr-based particle adsorbent has the advantages that the bore diameter is small, high porosity is achieved, and cost is low (the original pore structure of the kieselguhr and pores formed after particle accumulation and pore-forming agent calcination are organically combined). After FeCl3 modification of the kieselguhr-based particle adsorbent, the good effect of removing phosphorus waste water is achieved, and the kieselguhr-based particle adsorbent is a natural environment-friendly product large in adsorption capacity and relatively high in strength.

Description

technical field [0001] The invention belongs to the technical field of diatomite inorganic materials, and relates to a diatomite-based granular adsorbent and a preparation method thereof, as well as a method for modifying the diatomite-based granular adsorbent. Background technique [0002] Diatomaceous earth is formed by the sedimentation of dead diatom remains in oceans or lakes, and its chemical composition is mainly SiO 2 , containing a small amount of Al 2 o 3 , Fe 2 o 3 , CaO, MgO, K 2 O, Na 2 O.P 2 o 5 It is an insulating non-metallic mineral with a very large pore size, light density, large specific surface area, good adsorption performance, and certain acid and alkali resistance. The relative density of pure and dry diatomite is only 0.4~0.9g / cm 3 , The pore size distribution ranges from 50 to 800nm. The special structure of diatomite makes it have many special technical and physical properties, and it is widely used in light industry, food, chemical in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/14B01J20/28B01J20/30C02F1/28
CPCB01J20/14B01J20/0229B01J20/0288B01J20/12B01J20/28016B01J20/28054B01J2220/42B01J2220/4806B01J2220/4812C02F1/281C02F2101/105
Inventor 高如琴朱灵峰郝丹迪高瑛邵燕祥程萌吴洁琰
Owner NORTH CHINA UNIV OF WATER RESOURCES & ELECTRIC POWER
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