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Catalyst for treating wastewater as well as preparation method and application thereof

A technology for treating wastewater and catalysts, applied in catalyst activation/preparation, physical/chemical process catalysts, molecular sieve catalysts, etc., can solve the problems of insufficient adsorption and activity, and difficulty in achieving the expected effect of organic pollutants, so as to improve reaction kinetics rate, improve biodegradability, reduce COD effect

Active Publication Date: 2022-07-19
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The catalysts commonly used in the market are difficult to achieve the expected effect in the treatment of organic pollutants due to insufficient adsorption and activity.

Method used

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  • Catalyst for treating wastewater as well as preparation method and application thereof
  • Catalyst for treating wastewater as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] The silico-alumina was calcined and heat-treated in a high-temperature furnace at 780 °C for 5 h to obtain silica-alumina T1, 93 g of activated carbon was impregnated in Cu-Ce salt solution by supersaturation method, and dried at 100 °C for 5 h to obtain metal-containing activated carbon H1, taking 410 g of T1, 42g chopped polyester fiber filaments were mixed evenly, 14g of silica sol and 21g of glacial acetic acid were added and mixed well, and H1 and water were added and mixed evenly to form a formable mixture, then extruded, dried at 95°C for 5.5h, and heat-treated at 295°C for 6h under nitrogen conditions , then soaked in acetone for 24h, filtered, and then the solid particles dried at 95°C were treated in an aqueous solution containing 444g of sodium hydroxide, recycled for 5h, filtered, and the solid particles were washed with deionized water and dried at 95°C for 6h , calcined at 870 °C for 6 h under nitrogen protection to obtain catalyst A1. The properties of cat...

Embodiment 2

[0043] Heat-treated silico-alumina T2 was obtained by calcining silico-alumina in a high-temperature furnace at 700°C for 8 hours. 712g of activated carbon was impregnated in Fe-Ce salt solution by supersaturation method, and dried at 98°C for 5.5h to obtain metal-containing activated carbon H2. Take 598g of T2 , 125g chopped polyester fiber filaments are mixed evenly, add 46g silica sol, 36g nitric acid and mix well, add H2 and water and mix well to form a formable mixture and extrude, dry at 95 ℃ for 6.5 hours, and soak in nitrogen protection at 300 ℃ for 7 hours. In DMF for 24h, filtered, the solid particles dried at 100°C were treated in an aqueous solution containing 972g of sodium hydroxide, recycled for 6h, filtered, the solid particles were washed with deionized water, dried at 100°C for 6h, nitrogen protection conditions After calcination at 780°C for 6 hours, carbon-containing catalyst A2 was obtained. The properties of catalyst A2 are shown in Table 1.

Embodiment 3

[0045] The silica alumina was calcined in a high temperature furnace at 655 °C for 10 h to obtain heat-treated silica alumina T3, 1173 g of activated carbon was impregnated in a Mn-Ce salt solution by the supersaturation method, and dried at 100 ° C for 6 h to obtain metal-containing activated carbon H3, taking 603 g of T3, 93g of chopped polyethylene fiber filaments are mixed evenly, 67g of aluminum dihydrogen phosphate and 46g of nitric acid are added to mix well, H3 and water are added and mixed evenly to form a formable mixture, then extruded, dried at 95°C for 6.5h, and heat-treated at 300°C under nitrogen protection for 6h After immersion in chloroform for 20 hours, filtered, the solid particles dried at 100 °C were treated with an aqueous solution containing 818 g of sodium hydroxide, recycled for 5 hours, filtered, and the solid particles were washed with deionized water and dried at 100 °C for 5 hours , calcined at 800 °C for 4 h under nitrogen protection to obtain car...

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Abstract

The invention provides a catalyst for treating wastewater as well as a preparation method and application thereof. The preparation method comprises the following steps: firstly, preparing active metal-loaded active carbon; then uniformly mixing the modified silica-alumina, organic fibers, a binder and an acid solution, then adding the active metal-loaded active carbon, forming, drying and roasting to obtain a catalyst precursor; and further treating with an organic solvent and a caustic soda solution, washing, drying and roasting to obtain the catalyst. The catalyst for treating wastewater has a stepped pore size distribution through pore channel structure, and is beneficial to diffusion and adsorption of organic matters in pore channels; the active metal components in the catalyst are intensively distributed on the active carbon, and the catalyst shows good activity and stability in the advanced oxidation treatment process of sewage containing organic matters.

Description

technical field [0001] The invention belongs to the technical field of catalytic materials, in particular to a catalytic material for treating wastewater and a preparation method thereof. Background technique [0002] Ozone catalytic oxidation process is an effective sewage treatment method, which can be used in multiple links in sewage treatment, and can effectively adjust various indicators of sewage. The core function of the process is to treat organic pollutant wastewater that is difficult to biochemically degrade COD. Hydroxyl radicals are generated by ozone catalysis and react with organic pollutants in the sewage. In the high-concentration sewage pretreatment process, most of the COD can be reduced, and at the same time Improve the biochemical properties of sewage; in the treatment of low-concentration refractory sewage, the organic matter in the sewage can be completely degraded into carbon dioxide and water, thereby removing the organic matter in the water to reduce...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/76B01J29/78B01J35/10B01J37/08B01J37/02B01J37/00C02F1/78C02F1/28C02F101/30
CPCB01J29/7607B01J29/7807B01J23/002B01J37/08B01J37/0201B01J37/0018B01J37/082B01J37/088C02F1/78C02F1/288C02F2101/30C02F2209/08B01J2229/18B01J35/615B01J35/643B01J35/633B01J35/647Y02W10/37
Inventor 李宝忠王新勇蔡珂玮蒋广安赵越郭宏山
Owner CHINA PETROLEUM & CHEM CORP
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