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Preparation method of modified alumina carrier, catalytic ozone oxidation catalyst, and application of catalyst

A technology of alumina carrier and modifier, which is applied in the field of water treatment, can solve the problems that the performance cannot fully meet the industrial application, and achieve the effects of improving catalytic activity and service life, increasing removal rate, and improving dispersion

Active Publication Date: 2017-05-31
TIANJIN BISHUIYUAN MEMBRANE MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The performance of the catalytic ozonation catalyst prepared by the process of the above invention cannot fully meet the needs of industrial applications

Method used

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  • Preparation method of modified alumina carrier, catalytic ozone oxidation catalyst, and application of catalyst

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preparation example Construction

[0036] Described in the present invention, a kind of preparation method of modified alumina support comprises the following steps:

[0037] An alumina substrate is provided; the alumina substrate is sprayed with a modifier once, dried once, baked once, and cooled naturally to room temperature.

[0038] As described in the present invention, the primary modifier is an aqueous compound solution of one or more elements of nitrogen group elements, carbon group elements, and halogen group elements;

[0039] As described in the present invention, the mass content of the primary modifier is 0-10mmol / g; preferably, the mass content of the primary modifier is 0-6mmol / g; the balance is the carrier;

[0040] As described in the present invention, the primary drying temperature is 120-150°C, and the time is 3-4h;

[0041] As described in the present invention, the primary firing temperature is 300-800°C, and the time is 2-4h;

[0042] The alumina base material is subjected to the second...

Embodiment 1

[0063] As described in this embodiment, a method for preparing a modified alumina support comprises the following steps:

[0064] Provide an alumina substrate, spray 0.1mmol / g ammonium fluoride aqueous solution on the 3-5mm alumina substrate, then dry at 120°C for 4h, bake at 300°C for 4h, and naturally cool to room temperature;

[0065] A 2 mmol / g sodium hydroxide aqueous solution was sprayed and dipped on the alumina substrate for the second time, then dried at 100°C for 4 hours, then calcined at 400°C for 4 hours, and naturally cooled to room temperature to obtain a surface-modified alumina carrier.

[0066] Described in the present embodiment, the preparation method of catalytic ozone oxidation catalyst comprises the following steps:

[0067] Prepare the metal ion concentration in weight percentage, both are 10% manganese acetate and ferric nitrate solution, then measure the above two solutions respectively according to the volume ratio of 20:10 to prepare a mixed impregna...

Embodiment 2

[0069] This embodiment is improved on the basis of Embodiment 1, and the content described in Embodiment 1 is also included in this embodiment, and will not be described in detail here.

[0070] As described in this embodiment, a method for preparing a modified alumina support comprises the following steps:

[0071] Provide an alumina substrate, spray 4mmol / g polyacrylamide aqueous solution on a 3-5mm alumina substrate, then dry at 120°C for 3h, bake at 500°C for 2h, and cool naturally to room temperature;

[0072] A 10 mmol / g potassium nitrate aqueous solution was sprayed and dipped on the alumina substrate for the second time, then dried at 100°C for 4 hours, then calcined at 300°C for 4 hours, and naturally cooled to room temperature to obtain a surface-modified alumina carrier.

[0073] A performance test was performed on the catalytic ozonation catalyst obtained in this example, and the test results are shown in Table 1.

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Abstract

The invention relates to the technical field of water treatment, and especially relates to a preparation method of a modified alumina carrier, a catalytic ozone oxidation catalyst, and an application of the catalyst. The preparation method of the modified alumina carrier comprises the following steps: providing an alumina substrate; carrying out primary modifier spray immersion, primary drying and primary calcination on the alumina substrate, and naturally cooling the obtained calcined alumina substrate to room temperature; and carrying out secondary modifier spray immersion, secondary drying and secondary calcination on the alumina substrate, and naturally cooling the secondary calcined alumina substrate to obtain the modified alumina carrier. The catalytic ozone oxidation catalyst prepared from the modified alumina carrier greatly improves the COD removal rate, so the sewage treatment cost is reduced; the dissolution rate of metal ions is greatly reduced, so the service life of the catalyst is prolonged; and the catalyst has the advantages of low cost and simple preparation method, and is very suitable for industrial production.

Description

technical field [0001] The invention relates to the technical field of water treatment, in particular to a preparation method of a modified alumina carrier, a catalytic ozone oxidation catalyst and applications thereof. Background technique [0002] As an efficient, practical, and non-secondary pollution advanced oxidation technology, catalytic ozonation technology has broad application prospects in the field of refractory sewage treatment, and has become a research hotspot in the field of sewage treatment in recent years. [0003] However, the bottleneck problem that restricts the large-scale application of catalytic ozonation technology is the high cost of sewage treatment, and improving the activity of the catalyst can greatly reduce the dosage of ozone, thereby reducing the operating cost of sewage treatment. [0004] The invention patent with application number 200710032553.5 discloses a preparation method of ceramsite catalyst for catalytic oxidation of ozone. The coa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/04B01J23/889B01J32/00C02F1/72C02F1/78
CPCB01J23/002B01J23/04B01J23/8892B01J32/00B01J2523/00C02F1/725C02F1/78B01J2523/12B01J2523/31B01J2523/842B01J2523/72
Inventor 陈亦力张玉芬代攀李新涛张夏颖
Owner TIANJIN BISHUIYUAN MEMBRANE MATERIAL CO LTD
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