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Preparation method of pumice-loaded zinc oxide hydroxide

A zinc oxyhydroxide and pumice technology, applied in chemical instruments and methods, catalyst carriers, chemical/physical processes, etc., can solve the problems of difficulty in separation from water, secondary pollution, poor settling performance, etc. Fast, self-stable effect

Inactive Publication Date: 2011-05-18
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to provide a method for preparing pumice-loaded zinc oxyhydroxide in order to solve the existing problems of zinc oxyhydroxide that is difficult to separate from water, easily cause secondary pollution of treated effluent, and poor settling performance.

Method used

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  • Preparation method of pumice-loaded zinc oxide hydroxide

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specific Embodiment approach 1

[0010] Specific embodiment 1: The preparation method of pumice-loaded zinc oxyhydroxide in this embodiment is as follows: 1. Pretreated pumice particles with a particle size of 0.6-0.8 mm are dissolved in a concentration of 0.3 mol / L-3.0 mol / L. Soak in the zinc salt solution for 24 to 48 hours to obtain the mixed solution A; 2. Add the alkaline solution with a concentration of 1.0mol / L to 3.0mol / L dropwise into the mixed solution A, and stir until the solution is no longer Until precipitation occurs, obtain suspension B; 3. Adjust the pH value of suspension B to 12-14, then let it stand for precipitation for 30 minutes, and then activate it at a temperature of 30-60°C for 12-24 hours to obtain a mixture Liquid C; 4. Filter the mixed liquid C to obtain a solid phase, wash the solid phase with distilled water until the pH of the washing liquid is 7.0, and then dry it at a temperature of 30-60°C to obtain pumice-supported hydroxyl oxidation Zinc; wherein the pumice described in s...

specific Embodiment approach 2

[0012] Specific embodiment 2: The difference between this embodiment and specific embodiment 1 is that the pretreatment described in step 1 is to ultrasonically clean the pumice particles with a particle size of 0.6 to 0.8 mm for 2 times, each time for 10 minutes, and then use deionized Rinse with water three times, then dry at 60°C. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0013] Embodiment 3: The difference between this embodiment and Embodiment 1 is that the concentration of the soluble zinc salt solution in step 1 is 2.0 mol / L. Others are the same as in the first embodiment.

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Abstract

The invention provides a preparation method of pumice-loaded zinc oxide hydroxide, and relates to a preparation method of a pumice-loaded metal oxyhydroxide. The preparation method is used for solving the problems that the existing zinc oxide hydroxide is difficult to separate from water and is easy to result in secondary pollution of effluent post-treatment and poor sedimentation performance. The preparation method comprises the following steps: 1, soaking pumice particles in a soluble zinc salt solution to obtain mixed liquor A; 2, dropwise adding an alkaline solution to the mixed liquor A so as to obtain a turbid liquid B; 3, regulating the pH value of the turbid liquid B, standing and sedimenting, and then activating to obtain mixed liquor C; and 4, filtering the mixed liquor C to obtain a solid phase object, and washing the solid phase object with distilled water and drying to obtain the pumice-loaded zinc oxide hydroxide. The pumice-loaded zinc oxide hydroxide which is taken as a catalyst can be added to the water, and can be sedimented within 30 seconds fast and completely. The pumice-loaded zinc oxide hydroxide has the advantages of wear resistance, high catalytic activity, long service life, fast reaction speed, good water treatment effect and nonoccurrence of the secondary pollution, and is difficult to wash away.

Description

technical field [0001] The invention relates to a method for preparing pumice-supported metal oxyhydroxides. Background technique [0002] Zinc oxyhydroxide as a catalyst has been successfully applied in laboratory research in the field of heterogeneous catalytic ozonation, but zinc oxyhydroxide is in a suspension state after being dissolved in water, and there is basically no precipitation after standing for 30 minutes, and it is difficult to separate from water. The settlement performance is poor, so it is difficult to recycle, and it is easy to cause secondary pollution of the treated water, so it is difficult to use in engineering practice. Contents of the invention [0003] The purpose of the present invention is to provide a method for preparing pumice-supported zinc oxyhydroxide in order to solve the problems that existing zinc oxyhydroxide is difficult to separate from water, easily causes secondary pollution of treated effluent, and has poor settling performance. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/06B01J32/00
Inventor 陈忠林袁磊沈吉敏刘玥刘宇
Owner HARBIN INST OF TECH
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