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Composite carrier containing activated carbon and preparation method of composite carrier

A technology of composite carrier and activated carbon, which is applied in the direction of catalyst carrier, chemical instruments and methods, and other chemical processes, can solve the problems of low utilization rate of bulk molecular sieves, improve utilization rate and catalytic efficiency, and solve slow mass transfer rate, The effect of promoting the adsorption rate

Active Publication Date: 2021-07-16
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The invention adopts a hybrid molding method to prepare composite materials, and the utilization rate of bulk molecular sieves is low

Method used

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  • Composite carrier containing activated carbon and preparation method of composite carrier
  • Composite carrier containing activated carbon and preparation method of composite carrier

Examples

Experimental program
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Effect test

Embodiment 1

[0045] Wood activated carbon powder (200 mesh, specific surface area 840m 2 / g, average pore diameter 3.47nm) 125g, 325g of silica-alumina clay (46.1% by mass fraction of silica, 39.8% by mass of alumina) after roasting at 800°C, mix evenly, add 40% by mass of alkali-soluble carboxymethyl cellulose Mix and knead 100g of chopped fiber slurry evenly, then add 200g of sodium silicate binder with a mass content of 25% and knead evenly, add an appropriate amount of water and knead, then extrude into strips, dry at 110°C for 4 hours, and cure at 270°C for 3 hours under nitrogen protection. get the precursor. Take 5.0 g of the precursor and add it to 72.0 g of sodium hydroxide solution with a mass concentration of 7.5%, put it into a reactor and heat it in a water bath to 190°C for 4 hours; after cooling to room temperature, wash with distilled water until the pH is 7.9, filter, and dry at 90°C 6h, and roasted at 750°C for 3h under the protection of nitrogen to obtain the activated ...

Embodiment 2

[0048] Coconut shell activated carbon powder (200 mesh, specific surface area 1070m 2 / g, average pore diameter 3.86nm) 100g, 365g of silica-alumina clay (54.6% by mass fraction of silica, 43.5% by mass of alumina) after roasting at 900°C, mix evenly, add 20% by mass of polyester cellulose fiber chopped Mix 125g of silk slurry evenly, then add 100g of sodium silicate binder with a mass content of 35% and knead evenly, add an appropriate amount of water and knead, extrude into strips, dry at 90°C for 4 hours, and cure at 200°C for 5 hours under the protection of nitrogen to obtain a precursor . Add 7.8 g of the precursor to 80.4 g of sodium hydroxide solution with a mass concentration of 10.0%, heat it in a water bath to 130°C, stir evenly and then hydrothermally treat it for 6 hours; after cooling to room temperature, wash with distilled water until the pH is 7.2, filter, and dry at 80°C for 6 hours , and roasted at 700° C. for 3 h under the protection of nitrogen to obtain t...

Embodiment 3

[0051] Coal-based activated carbon powder (300 mesh, specific surface area 780m 2 / g, average pore diameter 4.36nm) 200g, 250g of silica-alumina clay (55.0% by mass fraction of silica, 40.9% by mass of alumina) after roasting at 1000°C, mix evenly, add 35% by mass of hydroxyethyl cellulose fiber short 100g of shredded slurry was mixed evenly, then 167g of sodium silicate binder with a mass content of 30% was added and mixed evenly, an appropriate amount of water was added, mixed and kneaded, extruded into strips, dried at 90°C for 4 hours, cured under nitrogen protection at 260°C for 4 hours, and the precursor body. Add 7.5 g of the precursor to 81.6 g of sodium hydroxide solution with a mass concentration of 8.2%, heat in an oven to 170°C, stir evenly and then hydrothermally treat it for 5 hours; after cooling to room temperature, wash with distilled water until the pH is 7.2, filter, and dry at 100°C for 6 hours , and roasted at 800° C. for 3 h under the protection of nitro...

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Abstract

The invention provides a composite carrier containing activated carbon and a preparation method of the composite carrier. The composite carrier comprises activated carbon, silica-alumina clay, a 4A molecular sieve and a bonding component. A precursor of the composite carrier is particles prepared from activated carbon, silica-alumina clay, an inorganic binder and alkali-soluble fiber short shreds, and the particles are subjected to hydrothermal treatment with alkali liquor to prepare the composite carrier of which the surface of an outer layer is rich in a 4A molecular sieve generated by in-situ crystal transformation of the silica-alumina clay and hydroxylated activated carbon. The composite carrier is stable in structure, high in adsorption capacity and high in deep removal capacity of organic pollutants.

Description

technical field [0001] The invention belongs to the technical field of catalytic materials, in particular to a composite carrier, a catalyst and a preparation method. Background technique [0002] When conventional catalysts treat organic pollutants, when the concentration of pollutants is reduced, the reaction rate is low due to the reduction of the initial concentration of pollutants on the surface of the catalyst, and the driving force is insufficient, so it is difficult to achieve the removal effect of pollutants at high concentrations. In order to further improve the removal rate of organic pollutants, it is necessary to add more oxidants than when the concentration of pollutants is high, so the economics of treating organic pollutants is seriously affected. The development of new catalytic materials with high adsorption performance with micro-nano pore structure can efficiently enrich pollutants on the surface of catalysts, increase the mass transfer rate of pollutants...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/70B01J29/74B01J29/76B01J32/00B01J20/20B01J20/30C02F1/28C02F1/72C02F1/78C02F101/30
CPCB01J29/7003B01J29/7607B01J29/7407B01J20/20B01J20/12B01J20/18C02F1/281C02F1/283C02F1/78C02F1/725B01J2220/4806B01J2220/4825B01J2220/4812B01J2220/42B01D2253/11B01D2253/102B01D2253/1085C02F2101/30C02F2101/308Y02P20/52Y02A50/20
Inventor 赵越蒋广安单广波李宝忠郭宏山
Owner CHINA PETROLEUM & CHEM CORP
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