Catalyst for wastewater treatment and method for wastewater treatment using said catalyst

A wastewater treatment and catalyst technology, applied in the direction of physical/chemical process catalysts, water/sewage treatment, chemical instruments and methods, etc., can solve the problems of insufficient catalytic activity and durability, and achieve good catalytic activity and durability.

Active Publication Date: 2007-10-03
NIPPON SHOKUBAI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the catalytic activity and durability of any of the catalysts are insufficient

Method used

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  • Catalyst for wastewater treatment and method for wastewater treatment using said catalyst
  • Catalyst for wastewater treatment and method for wastewater treatment using said catalyst

Examples

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preparation example Construction

[0046] The preparation method of the catalyst related to the present invention is not particularly limited, and the catalyst can be easily prepared by a known method. Methods for supporting a catalytically active component on a carrier include, for example, a kneading method, an impregnation method, an adsorption method, a spray method, an ion exchange method, and the like.

[0047] The catalyst having the above-mentioned configuration can maintain the catalytic activity and durability of the catalyst for a long time, and can provide high mechanical properties. Furthermore, using the catalyst of the present invention described above, wastewater treatment by wet oxidation treatment can provide clean water purified at a high level.

[0048] The wet oxidation treatment of wastewater using the catalyst of the present invention will be described in detail below. The type of wastewater to be treated by the wet oxidation treatment of the present invention is not particularly limited...

preparation Embodiment 1

[0090] In the preparation of the catalyst, a flaky titanium oxide support is used. The carrier has an average diameter of 5 mm, an average length of 7.5 mm, an average compressive strength of 3.4 kg / particle (a load is applied on the carrier (catalyst), when the carrier (catalyst) is destroyed, the average value of the load), 44 m 2 The specific surface area measured by the BET method per g, the solid acid content of 0.32mmol / g; the titanium oxide crystal structure forming the support is anatase type. The catalyst (A-1) was obtained by filling the carrier with an aqueous solution of the catalytically active component (the aqueous solution was absorbed by the added platinum nitrate aqueous solution, then dried at 150°C, and further subjected to combustion treatment at 300°C using a hydrogen-containing gas for 2 hours) ). Table 1 shows the main components of the produced catalyst (A-1) and their mass ratios. In addition, the specific surface area, average compressive strength,...

preparation Embodiment 2 to 7

[0092] In any one of Catalyst Preparation Examples 2 to 7, the carrier used in Catalyst Preparation Example 1 was used. Catalysts (A-2 to A-7) listed in Table 1 were prepared in the same manner as in Catalyst Preparation Example 1 except for changing a part of the raw materials in the method of filling the carrier with an aqueous solution of the catalytically active ingredient.

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Abstract

The present invention relates to a catalyst for wastewater treatment and a method for wet oxidation treatment of wastewater using the catalyst, in particular, the catalyst of the present invention can suitably be used in wet oxidation treatment of wastewater, under high temperature and high pressure conditions. The present invention provides a catalyst for wastewater treatment containing a catalytic active constituent containing at least one kind of an element selected from the group consisting of manganese, cobalt, nickel, cerium, tungsten, copper, silver, gold, platinum, palladium, rhodium, ruthenium and iridium, or a compound thereof, and a carrier constituent containing at least one kind of an element selected from the group consisting of iron, titanium, silicon, aluminum and zirconium, or a compound thereof, characterized in that solid acid amount of the carrier constituent is equal to or more than 0.20 mmol / g.

Description

technical field [0001] The invention relates to a catalyst for wastewater treatment and a wastewater wet oxidation treatment method using the catalyst. In particular, under high temperature and high pressure conditions, the catalyst of the present invention can be applied to waste water wet oxidation treatment. Background technique [0002] In general, as methods of wastewater treatment, biological treatment, combustion treatment, and Timmerman's method have been known. [0003] As a biological treatment method, an activated sludge treatment method, an aerobic treatment method such as a biofilm method, an anaerobic treatment method such as a methane fermentation method, and a combined treatment method of an aerobic treatment method and an anaerobic treatment method are generally used. In particular, an aerobic treatment method using microorganisms has been widely used as a wastewater treatment method, however, since in the case of performing an aerobic microbial treatment m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/40B01J23/52B01J23/89B01J21/06B01J23/889C02F1/72
CPCC02F1/725B01J21/063B01J21/066B01J23/34B01J23/40B01J23/52B01J23/8892B01J23/8906C02F11/086B01J21/00C02F1/72
Inventor 三宅纯一石井徹
Owner NIPPON SHOKUBAI CO LTD
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