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Composite oxide modified wet oxidation catalyst and preparation method thereof

A composite oxide, wet oxidation technology, applied in metal/metal oxide/metal hydroxide catalysts, catalyst activation/preparation, physical/chemical process catalysts, etc., can solve the complex preparation process, poor formability, poor strength, etc. problems, to achieve the effect of improving physical structure, improving formability, and reducing production costs

Active Publication Date: 2012-05-16
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] One of the technical problems to be solved by the present invention is the wet oxidation catalyst in the prior art, because TiO 2 The problem of poor formability, poor strength or complicated preparation process and high cost is provided, and a new wet oxidation catalyst modified by composite oxide is provided.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] TiO 2 -B x o y Vector Preparation 1

[0030] a) Take an appropriate amount of nano-TiO 2 , Nano Al 2 o 3 and nano-SiO 2 , respectively 85%, 5%, 10% by weight, and 2% of the entire oxide methyl cellulose for mixing, ball milling and dry mixing for 4 hours;

[0031] b) Transfer the mixture into a mud mill, add 5wt% HAc aqueous solution dropwise, and stop adding the solution when the mixture is about to change from powder to granule or block, and then knead for 3 hours;

[0032] c) The refined mud is aged below 10°C for 12 hours before forming;

[0033] d) Select a suitable orifice plate such as Φ1.6mm to continuously extrude thin strips. When extruding, pay attention to the screw speed and the pressure in the chamber, keep the speed at about 50r / min, and the pressure at about 80MPa;

[0034] e) The formed thin strip carrier green body is dried naturally for 8 hours, and forced to dry in an oven for 24 hours;

[0035] f) Roasting according to the following procedu...

Embodiment 2

[0041] TiO 2 -B x o y Vector preparation 2

[0042] a) Take an appropriate amount of nano-component oxide, i.e. 85wt% TiO 2 , 10wt% Al 2 o 3 , 4wt% SiO 2 , 1wt% Bi 2 o 3 , and the PVA that accounts for 4wt% of the entire oxide is ball milled and dry mixed for 4h;

[0043] B) mud refining, aging, extrusion, drying and roasting conditions are the same as in Example 1;

[0044] When extruded, the strips are continuously and stably produced, and the surface of the thin strips is smooth; XRD test shows that it is anatase phase TiO 2 ; The average strength is 175N.

Embodiment 3

[0046] TiO 2 -B x o y Vector preparation 3

[0047] a) Take an appropriate amount of nano-component oxide, namely 90wt% TiO 2 , 6wt%Al 2 o 3 , 3wt% SiO 2 and 1 wt% CeO 2 , and the methyl cellulose accounting for 6wt% of the oxide was ball-milled and dry mixed for 4 hours;

[0048] B) mud refining, stale, extrusion, drying are the same as in Example 2;

[0049] c) The dried strip green body is sintered according to the following procedure:

[0050] RT(60min)→400℃(60min)→600℃(60min)→900℃(120min)→900℃(off)→RT.

[0051] When extruded, the strips are continuously and stably produced, and the surface of the thin strips is smooth; XRD test shows that it is anatase phase TiO 2 ; The average strength is 174N.

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Abstract

The invention relates to a composite oxide modified wet oxidation catalyst and a preparation method thereof. The problems of poor TiO2 forming performance, weak intensity, complicated catalyst preparation process and high cost in the prior art are mainly solved. Composite carriers are formed through adopting titanium oxide, aluminum oxide, silicon oxide and bonding agents, at least one kind of materials selected from Ru, Pt, Ir, Pd and Rh is loaded on the composite carriers, and the technical scheme of the catalyst and the preparation method of the catalyst is formed, the problems are perfectly solved, and the catalyst and the preparation method can be used in the industrial production of wet oxidation catalysts.

Description

technical field [0001] The invention relates to a composite oxide modified wet oxidation catalyst and a preparation method thereof. Background technique [0002] With the rapid development of industrial technology, industrial wastewater is increasing day by day; chemical wastewater and its pollutants have high concentration and high toxicity, and are generally difficult to carry out biochemical treatment. At the same time, people's awareness of environmental protection is increasing day by day, laws and regulations are becoming more and more perfect, and the requirements for wastewater discharge are more stringent. Therefore, how to efficiently and economically treat high-concentration industrial wastewater (acrylonitrile-containing wastewater) has become a difficult and hot spot in the field of water treatment. Among the many methods, wet air oxidation (Wet Air Oxidation, WAO) treatment is a technical hotspot: it uses oxidants to oxidize organic matter in wastewater into c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/40B01J37/02C02F1/72
Inventor 吴历斌宋卫林汪国军吴粮华
Owner CHINA PETROLEUM & CHEM CORP
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