Hydroxylation iron catalyzer, preparation method and application thereof

An iron catalyst and a hydroxylation technology are applied in the field of hydroxylated iron catalyst and its preparation, which can solve the problems of low catalytic activity of the catalyst, secondary pollution by metal ion dissolution, poor stability, etc. high sex effect

Inactive Publication Date: 2008-05-07
HARBIN INST OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to provide a hydroxylated iron catalyst and its preparation in order to solve the problems of low catalytic activity, poor stability of the catalyst, and secondary pollution introduced by the dissolution of metal ions in the existing heterogeneous catalytic ozonation water treatment process. Methods and Applications

Method used

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  • Hydroxylation iron catalyzer, preparation method and application thereof
  • Hydroxylation iron catalyzer, preparation method and application thereof

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specific Embodiment approach 1

[0012] Specific implementation mode one: the iron hydroxylation catalyst of the present embodiment is formed by soluble ferric salt aqueous solution and alkali solution 3+ with OH - The molar ratio is 1:3~4, which is made by uniform precipitation method, and the soluble ferric salt is FeCl with a volume concentration of 10~40%. 3 , Fe 2 (SO 4 ) 3 , Fe(NO 3 ) 3 or FePO 4 , the alkaline solution is a NaOH or KOH aqueous solution with a volume concentration of 20-50%; its preparation method: 1. prepare a soluble ferric salt solution and an alkaline solution; Add dropwise to the soluble ferric salt aqueous solution to mix and precipitate evenly, the dropping rate is 1-2 drops / s; 3. After the precipitation reaction is completed, adjust the pH of the mixed solution to 12-14, and let it stand for 3-6 hours (the purpose of standing is to Make the precipitation complete); 4. Put the reactant after standing in the incubator, activate it for 12-20h at 70-80°C, and then filter to o...

specific Embodiment approach 2

[0015] Specific embodiment two: the difference between this embodiment and specific embodiment one is that Fe 3+ with OH - The molar ratio is 1:3.2~3.8. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0016] Specific embodiment three: the difference between this embodiment and specific embodiment one is that Fe 3+ with OH - The molar ratio is 1:3.5. Others are the same as in the first embodiment.

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Abstract

The invention discloses hydroxylation iron catalyst, and a preparation method and the application thereof, which relates to solid catalyst and the preparation method thereof. The invention solves the problems existing in the prior multiphase catalytical ozonized water treatment process that the catalytic activity of the catalyst is low, the stability is poor, and the secondary pollution is caused by the stripping of the metal ion. The hydroxylation iron catalyst of the invention is made of dissoluble ferric iron salt solution and alkali solution according to the mol ratio of 1: 3 to 4 of Fe<+3> and OH<-> and by adopting the homogeneous precipitation method, the invention is used for treating drinking water by catalytical ozonizing. The method of the invention is simple and convenient for operation, and the crystal form of the particle of the obtained product is complete, uniform and dense, and the distribution of the particle diameter is uniform. The catalyst of the invention can remove the organic pollutant difficult to be degraded in drinking water by catalytical ozonizing within the range of the pH equal to 4 to 10; the high activation of the catalyst is high and the capacity of removing trace amount of organic pollutant difficult to be degraded is strong; the stability is high, and the catalyst is uneasy to be digested and can be recurrently used to reduce the cost, and is uneasy to cause the secondary pollution.

Description

technical field [0001] The invention relates to a solid catalyst, its preparation method and application; in particular, it relates to a hydroxylated iron catalyst, its preparation method and its application in catalytic ozonation treatment of drinking water. Background technique [0002] The traditional drinking water treatment process has very limited ability to remove dissolved trace organic pollutants. Ozonation technology has a good effect on organic matter treatment and less secondary pollution, which has become a research hotspot in the field of water treatment in recent years. However, when the single ozonation technology is used, the utilization rate of ozone is very low due to the influence of ozone oxidation capacity and mass transfer efficiency, so the degradation efficiency of organic pollutants is also relatively low. The combination of ozone and other oxidants (such as O 3 / Cl 2 , O 3 / ClO 2 etc.) can improve the degradation efficiency of organic pollutant...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/745C02F1/78C01G49/02
Inventor 陈忠林徐贞贞贲岳
Owner HARBIN INST OF TECH
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