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Preparation method of hydroxylation cobalt and its application in water treatment

A cobalt hydroxylation and hydroxylation technology, applied in the direction of cobalt oxide/cobalt hydroxide, etc., to achieve uniform and dense particle size distribution, no secondary pollution, and complete crystal form.

Active Publication Date: 2007-07-18
江苏哈宜环保研究院有限公司
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

Cobalt Hydroxide Used as Ozone Catalyst in Water Treatment Process

Method used

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  • Preparation method of hydroxylation cobalt and its application in water treatment

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specific Embodiment approach 1

[0006] Specific embodiment one: the cobalt hydroxylate of this embodiment is prepared according to the following steps: (1) constantly stirring the soluble divalent cobalt salt solution whose concentration is 0.2mol / L~2.0mol / L, and slowly adding the concentration dropwise to be 0.25mol / L ~2.1mol / L strong alkaline solution until no precipitation occurs; (2) adjust the pH value of the suspension formed in step 1 to >12, and then place it in an environment of 30°C-100°C for activation for 12-20h; (3) ) to filter, and the precipitate was washed with distilled water to neutrality and then dried to obtain cobalt hydroxide.

[0007] In this embodiment, the precipitate is dark pink.

specific Embodiment approach 2

[0008] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the concentration of the soluble divalent cobalt salt solution in step (1) is 0.5 mol / L˜1.5 mol / L. Other steps are the same as those in Embodiment 1.

specific Embodiment approach 3

[0009] Embodiment 3: The difference between this embodiment and Embodiment 1 is that the concentration of the soluble divalent cobalt salt solution in step (1) is 0.7 mol / L˜1.3 mol / L. Other steps are the same as those in Embodiment 1.

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Abstract

This invention discloses a preparation method of hydroxylated cobalt and its application in water treatment. It relates to a preparation method of mixture and its application in water treatment. It is first time to disclose a preparation method of hydroxylated cobalt and its application in water treatment. Prepare hydroxylated cobalt: 1. add alkaline solution into divalence cobalt salt solution until no sediment emerging; 2. adjust suspension PH more than 12, activate; 3. filter, wash sediment to neutrality with distilled water, dry, and get hydroxylated cobalt. Hydroxylated cobalt is used as ozone catalytic agent for water treatment technology. This hydroxylated cobalt is of integrated and uniform particle crystal form, and uniform grain size. This invention avoids impurity precipitating. Hydroxylated cobalt purity reaches more than 99%. Hydroxylated cobalt can promote ozone to transform into hydroxy group free radicle, increase production rate and quantity of free radicle that is in water body. Ability of ozone removing organic contaminant that is in water can be raised 35-42%.

Description

technical field [0001] The invention relates to a preparation method of the mixture and its application in water treatment. Background technique [0002] Cobalt hydroxide is a mixture consisting of CoOH and CoO·OH. At present, there is no report on the preparation method or application of cobalt hydroxide. Contents of the invention [0003] The invention first discloses a preparation method of cobalt hydroxide and its application in water treatment. Cobalt hydroxylate is prepared according to the following steps: (1) Constantly stirring the soluble divalent cobalt salt solution with a concentration of 0.2mol / L to 2.0mol / L, and slowly adding a strong base with a concentration of 0.25mol / L to 2.1mol / L (2) adjust the pH value of the suspension formed in step 1 to > 12, and then place it in an environment of 30°C to 100°C for activation for 12 to 20 hours; (3) filter the precipitate with distilled water Wash until neutral and then dry to obtain cobalt hydroxide. Cobalt ...

Claims

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Application Information

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IPC IPC(8): C01G51/04
Inventor 陈忠林徐贞贞贲岳
Owner 江苏哈宜环保研究院有限公司
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