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Catalyst used for degrading formaldehyde wastewater, preparation method and application thereof

A formaldehyde wastewater and catalyst technology, applied in the direction of catalyst activation/preparation, chemical instruments and methods, heterogeneous catalyst chemical elements, etc., can solve the problems of unstable carrier structure, insufficient active sites, low specific surface area, etc., and achieve change Electron cloud density, solution to recycling, and the effect of large specific surface area

Active Publication Date: 2018-02-27
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] MnO 2 As an excellent transition metal oxide carrier, it has the advantages of low cost, abundant resources, high efficiency and low secondary pollution, but ordinary porous MnO 2 The carrier structure is unstable, the specific surface area is not high, the loading capacity is small, and the active sites are insufficient

Method used

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  • Catalyst used for degrading formaldehyde wastewater, preparation method and application thereof
  • Catalyst used for degrading formaldehyde wastewater, preparation method and application thereof
  • Catalyst used for degrading formaldehyde wastewater, preparation method and application thereof

Examples

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preparation example Construction

[0022] Wherein, the preparation method of novel porous manganese dioxide carrier HMO comprises the steps: potassium permanganate solution is added dropwise to polyethylene glycol (PEG), / methyl cellulose (MC) / hydroxypropyl methyl cellulose ( HPMC), diluted octanol / isononanol solution, manganese sulfate solution, the mixed solution was ultrasonicated for 10min, then stirred for 1h, and then the uniformly mixed solution was added dropwise to polymethyl methacrylate (PMMA) / ultrasonic Fine spherical aluminum powder, ammonium bicarbonate / sodium bicarbonate, mixed solution, slowly stirred to form a uniform dispersion, placed under high temperature and high pressure conditions to form a gel, suction filtered, washed, dried under vacuum conditions, and used Ground in an agate mortar and roasted to obtain a brown-black HMO carrier. Control the weight ratio of manganese sulfate and potassium permanganate to be 1:0.5-2.

[0023] The preparation process of M / HMO catalyst comprises: get co...

Embodiment 1

[0025] Performance comparison of embodiment 1 novel HMO carrier and porous manganese dioxide carrier

[0026] Using iron oxide as the catalyst active center and HMO or porous manganese dioxide as the catalyst support, Fe 2 o 3 / HMO catalyst and Fe 2 o 3 / MnO 2 catalyst.

[0027] Fe 2 o 3 The preparation process of HMO / HMO catalyst is as follows: potassium permanganate solution is added dropwise in polyethylene glycol (PEG), diluted octanol, manganese sulfate solution, ultrasonic, so that the weight ratio of manganese sulfate and potassium permanganate is 1 : 1, stir, then add the uniformly mixed solution dropwise to the mixed solution containing polymethyl methacrylate (PMMA), ammonium bicarbonate, slowly stir to form a uniform dispersion, high temperature and high pressure, form a gel, pump Filter, wash, dry under vacuum, grind with agate mortar, and roast to obtain brown-black HMO carrier. Control the ratio of the weight of the metal salt in the active component prec...

Embodiment 2

[0033] The performance comparison of embodiment 2 three kinds of dispersants

[0034] Add potassium permanganate solution dropwise to polyethylene glycol (PEG) / methylcellulose (MC) / hydroxypropylmethylcellulose (HPMC), diluted octanol solution, manganese sulfate solution, and ultrasonically The weight ratio of manganese sulfate and potassium permanganate is 1:1, stir, and then add the uniformly mixed solution dropwise to the mixed solution containing polymethyl methacrylate (PMMA) and ammonium bicarbonate, stir slowly to form a uniform The dispersion liquid was formed into a gel under high temperature and high pressure, filtered, washed, dried under vacuum, ground with an agate mortar, and roasted to obtain a brown-black HMO carrier. Control the massfraction of polyethylene glycol (PEG) / methylcellulose (MC) / hydroxypropylmethylcellulose (HPMC) to be 0.1%, the weight that contains metal salt and the weight of HMO carrier in the active component precursor solution The ratio is 5:...

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Abstract

The invention discloses a catalyst used for degrading formaldehyde wastewater, a preparation method and application thereof. The catalyst is expressed by a general formula M / HMO, wherein M is an active ingredient, HMO is a novel porous manganese dioxide carrier, and the mass ratio of the mole number of M to HMO is (1 to 5): 100. The novel porous MnO2 carrier which is large in specific surface areaand high in active sites and is capable of playing a synergistic effect with the active ingredient to catalytically oxidizing and degrading formaldehyde wastewater and an efficient catalyst capable of stably degrading formaldehyde wastewater at a room temperature condition are developed, the operating conditions are further optimized while relatively high formaldehyde degradation rate is maintained, and the catalyst has important practical significance.

Description

technical field [0001] The invention relates to a catalyst and its preparation method and application, in particular to a catalyst for degrading formaldehyde waste water and its preparation method and application. Background technique [0002] Formaldehyde is an important industrial raw material and a commonly used reagent in biological and medical experiments. It has a wide range of uses, but it is highly toxic to humans and other animals. Formaldehyde wastewater mainly comes from the production process of organic synthesis, organic rubber, paint, paint, plastic, leather and so on. Formaldehyde is highly toxic, with a lethal dose of 140mg / Kg. If humans drink water polluted by formaldehyde for a long time, it will cause dizziness, anemia and various neurological diseases. Therefore, the treatment of formaldehyde waste liquid is highly valued. [0003] At present, the technology of formaldehyde degradation is in the research stage, mainly including adsorption method, steam s...

Claims

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Application Information

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IPC IPC(8): B01J23/889B01J23/34B01J37/03B01J37/08B01J37/34C02F1/72C02F101/34
CPCC02F1/722C02F1/725B01J23/002B01J23/34B01J23/8892B01J37/035B01J37/036B01J37/08B01J37/082B01J37/345C02F2305/023C02F2101/34B01J2523/00B01J35/23B01J35/399B01J2523/17B01J2523/72B01J2523/842B01J2523/44
Inventor 吴敏邵亚敏孟徐王军如陈龙军孙岳明倪恨美郑颍平马全红
Owner SOUTHEAST UNIV
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