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Catalyst for degrading organic wastewater and preparation method thereof

An organic waste water and catalyst technology, which is applied in chemical instruments and methods, physical/chemical process catalysts, energy waste water treatment, etc., can solve the problems of fine particle size of titanium dioxide powder, difficult recovery of titanium dioxide, unfavorable light transmission, etc. And the density is moderate, the sewage treatment effect is improved, and the manufacturing difficulty is reduced.

Inactive Publication Date: 2016-03-23
HUNAN YONKER ENVIRONMENTAL PROTECTION RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Shen Xunwei and others in "The Effect of Persulfate on Photocatalytic Degradation of Phenol in Titanium Dioxide Suspension System" (Journal of Environmental Science Vol. It makes the system turbid, which is not conducive to the transmission of light. Secondly, after the reaction is completed, there is separation of titanium dioxide and wastewater. The particle size of titanium dioxide powder is very fine, which makes separation difficult. In addition, it is difficult to recover titanium dioxide, resulting in increased costs.

Method used

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  • Catalyst for degrading organic wastewater and preparation method thereof

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Embodiment 1

[0029] This embodiment provides a catalyst for degrading organic wastewater and a preparation method of the catalyst. The catalyst is based on a zeolite with an average particle size of 3mm as a carrier, and a cobalt-titania composite material layer of about 150nm is coated on the surface of the zeolite, and the molar ratio of cobalt to titanium dioxide in the cobalt-titania composite layer is about 1: 70; the density of the catalyst is 1.13g / cm 3 .

[0030] The preparation method of this catalyst is as follows:

[0031] a. Put 1000g of zeolite in a calciner at 900°C for 1.5 hours and calcine for 1.5 hours. After cooling, rinse with water to remove soluble salts, and dry at 200°C for later use.

[0032] b. Dissolve cobalt acetate in water to prepare cobalt-containing 0.1M cobalt salt solution, add glacial acetic acid to acidify to pH about 5.5, and prevent cobalt ion precipitation.

[0033] c. Take 10 mL and add 90 mL of absolute ethanol to prepare cobalt ethanol solution f...

Embodiment 2

[0037] This embodiment provides a catalyst for degrading organic wastewater and a preparation method of the catalyst. The catalyst uses zeolite with an average particle size of 3 mm as a carrier, and coats a layer of titanium dioxide layer of about 100 nm on the surface of the zeolite, and then coats a layer of cobalt-titania composite material layer of about 150 nm. The cobalt-titania composite material The molar ratio of cobalt to titanium dioxide in the layer is about 1:150; the density of the catalyst is 1.2g / cm 3 .

[0038] The preparation method of this catalyst is as follows:

[0039] a. Put 1000g of zeolite in a calciner at 900°C for 2 hours, then rinse with water after cooling to remove soluble salts, and dry at 200°C for later use.

[0040] b. Add 200mL absolute ethanol to the reactor, add 3.5mL acetylacetone, 6mL glacial acetic acid, stir well, add 34mL butyl titanate, stir well. Another 15 mL of ethanol with a volume fraction of 90% was slowly added dropwise int...

Embodiment 3

[0047] In order to verify the catalytic effect of the prepared catalyst of embodiment 1 and embodiment 2, carried out catalytic effect experiment and comparison, concrete experiment is as follows:

[0048] The refractory organic wastewater sample was taken from a petrochemical enterprise, COD (chemical oxygen demand) = 1050mg / L, BOD (biological oxygen demand) / COD = 0.12, and the fluorescence dyeing toxicity test was 72%.

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Abstract

The invention discloses a catalyst for degrading organic wastewater and a preparation method thereof. The catalyst is prepared by coating a cobalt-titanium dioxide composite material layer on a granular carrier. The thickness of the cobalt-titanium dioxide composite material layer is 100-240 nm. The molar ratio of cobalt to titanium dioxide in the cobalt-titanium dioxide composite material layer is 1: (50-200). The catalyst is good in catalytic effect and long in service life.

Description

technical field [0001] The invention relates to a catalyst for degrading organic wastewater and a preparation method thereof, belonging to the field of sewage treatment. Background technique [0002] Persulfate advanced oxidation is an effective method developed in recent years to treat refractory organic wastewater. The oxidation mechanism is that under the action of a catalyst, it produces SO with a higher oxidation potential than OH. 4 - , the main catalytic methods are thermal catalysis, photocatalysis and chemical catalysis. Chemical catalysis is mainly based on metal or transition metal ions such as Fe 0 , Fe 2+ 、Co 2+ 、Ce 2+ Wait for activation · SO 4 - . Zhang Shenghan et al. in "Ferrous Sulfate / Potassium Persulfate System Advanced Treatment of Printing and Dyeing Wastewater" (Journal of Donghua University Vol.39N6.P814), Wan Xiaojiao et al. Metal Design and Research Vol.35No.1P33) and the invention patent of Zhang Naidong et al.: 201110149719.8 introduced t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/75B01J35/10C02F1/32C02F1/72
CPCY02W10/37
Inventor 贺前锋宋乐山言海燕陈亚利赵迪蔡群欢姚咏歌阙雄杰
Owner HUNAN YONKER ENVIRONMENTAL PROTECTION RES INST
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