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Nano grade transition metal oxidation catalyst and its preparing method and use

A technology for oxidizing catalysts and transition metals, applied in metal/metal oxide/metal hydroxide catalysts, catalyst activation/preparation, physical/chemical process catalysts, etc., can solve high reaction pressure, high operating costs, high reaction temperature, etc. problem, to achieve the effect of long reaction life and low price

Inactive Publication Date: 2006-01-04
CNPC JILIN CHEM GROUP CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Generally speaking, the non-precious metal water treatment oxidation catalysts currently developed at home and abroad have high reaction temperature (>100°C) and high reaction pressure (3.0-10.0MPa), so the equipment investment is large and the operating cost is high.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041]SiO involved in the catalyst of the present invention 2 -Al 2 o 3 -TiO 2 - Preparation of rare earth oxide nanocomposite powder. 4000g of solid aluminum sulfate is added to 3.25L of distilled water while heating and stirring to dissolve completely into aluminum sulfate solution (a), and 500gH 2 TiO 3 (Metatitanic acid) was added into 900ml of concentrated sulfuric acid and fully reacted titanium sulfate solution (b), and 185g of solid cerium nitrate or lanthanum nitrate was added into 2L of water and fully dissolved to obtain cerium nitrate solution or lanthanum nitrate solution (c). Add an appropriate amount of deionized water to the ammonia water and dilute it into 10% dilute ammonia water (d), add 4.8L industrial primary modulus 3.0 concentrated water glass to 8L water to obtain dilute water glass solution (e), 10% isobutanol (or methanol or Ethanol) 500ml (f), take a 20-liter stainless steel reaction tank with heating control system and double-layer paddle stirr...

Embodiment 2

[0043] Add 95 grams of neodymium nitrate and 90 grams of niobium nitrate to 2 L of water, respectively, and fully dissolve to form a mixed solution (c). Other steps and process conditions are all with embodiment 1.

[0044] 2. Preparation of catalyst

Embodiment 3

[0046] It is carrier A and catalyst KA involved in the catalyst of the present invention. Weigh 150g of the nanocomposite powder obtained in Example 1, add about 111ml of 5% dilute nitric acid and knead for 20min, roll it into a wet block, mechanically shape it into a ring, dry and activate it to obtain carrier A, and then use 300ml of V 2 o 5 Wt% 3-8% ammonium metavanadate immersion solution is excessively impregnated 120g carrier A for 4-6 hours, dried and activated, and then 300ml containing MnO 2 wt% 8-17% Mn(NO 3 ) 2 The solution is excessively impregnated with 120g carrier A for 4 to 6 hours, and after being dried and activated to obtain the catalyst KA of the present invention, the total amount of transition metal Mn-V supported on the catalyst is about 20% in terms of oxides.

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PUM

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Abstract

The present invention is efficient oxidizing catalyst for organic waste water treating and its preparation process and application. The carrier prepared with composite powder of Ti, Si, Al and RE oxide and in the average granularity smaller than 100 nm is loaded with at least two kinds of transition metal to prepare the catalyst. The catalyst contains TiO2-SiO2-Al2O3 65-85 wt%, RE oxide 5-15 wt%, and transition oxide 5-30 wt%. The preparation process of the catalyst includes preparing carrier powder with the carrier components and through precipitation, homogenization, ageing, filtering, washing, pulping, dispersing, fluidizing at supercritical condition to eliminate water and activating; forming the carrier, soaking, fluidizing and drying, and activating to obtain the catalyst. The catalyst is used in acid organic waste water treatment and has COD degrading rate higher than 95 %, ammonia nitrogen oxidizing conversion rate higher than 99 % and chroma eliminating rate higher than 95 %.

Description

technical field [0001] The present invention relates to a high-efficiency oxidation catalyst in the treatment of organic wastewater, in particular to a catalytic oxidation treatment facility for biorefractory organic wastewater with strong acidity, high concentration, high chroma, and high ammonia nitrogen containing naphthalene-based sulfonate components Catalyst needed. Background technique [0002] Oxidation catalyst for deep oxidation of high-concentration organic wastewater is a highly active multifunctional catalytic material, which can make oxidants such as O 2 、H 2 o 2 , O 3 , ClO 2 Under the given operating conditions, the OH strong oxidizing group is quickly separated and released, and at the same time, the organic matter and ammonia nitrogen are oxidatively cracked on the inner surface of the catalyst adsorbed on organic matter or ammonia-nitrogen, so as to achieve the removal of organic components and ammonia nitrogen to reduce waste w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J32/00B01J35/02B01J37/02B01J21/12B01J23/10B01J23/16B01J23/83
Inventor 丁忆李晶李凯荣王勋章赵维君郭双龙
Owner CNPC JILIN CHEM GROUP CORP
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