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Preparation method of active cryptomelane

A cryptopotassium manganese ore and active technology, which is applied in the field of preparation of active cryptopotassium manganese ore, can solve problems such as difficult commercial production, high cost and high price, and achieve the effects of simple method, low cost and easy operation

Inactive Publication Date: 2010-07-14
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although there are many related studies on cryptopotassium manganese ore, the synthesis of cryptopotassium manganese ore in the past is based on the use of pure inorganic manganese salts or oxides or even organic manganese salts as raw materials in the laboratory, which is expensive and difficult to commercialize. Production

Method used

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  • Preparation method of active cryptomelane
  • Preparation method of active cryptomelane
  • Preparation method of active cryptomelane

Examples

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Effect test

Embodiment 1

[0023] Weigh 8g of oceanic manganese nodule ammonia leaching residue, wash with deionized water for 3 times, then filter with suction, then dissolve in 0.6mol / L sulfuric acid solution, stir for 10min, mix with 43°C solution containing 11g of potassium persulfate, and use 0.5 mol / L of KOH and H 2 SO 4 Adjust the pH value of the solution to 0, then pour the mixed solution into a polytetrafluoroethylene-lined high-pressure hydrothermal kettle to about 80%, keep the hydrothermal constant temperature under an external heat source at 150°C for 24 hours, naturally cool and age for 24 hours, filter, and use Wash the filter residue with deionized water until neutral, dry it at 120°C for 16 hours, and then grind it. The XRD and SEM images of the product are shown in figure 1 , figure 2 , confirmed as nano-scale active cryptopotassium manganese ore. Using this product as a catalyst can significantly promote the degradation of methylene blue with 30% hydrogen peroxide.

Embodiment 2

[0025] Weigh 6g of oceanic manganese nodules ammonia leaching residue, wash with deionized water for 3 times, then filter with suction, then dissolve in 0.6mol / L sulfuric acid solution, stir for 10min, mix with 43°C solution containing 9g of potassium persulfate, and use 0.5 mol / L of KOH and H 2 SO 4 The pH value of the solution was adjusted to 5, and then the mixed solution was poured into a polytetrafluoroethylene-lined high-pressure hydrothermal kettle to about 80%, kept at a temperature of 120°C under an external heat source for 24 hours, naturally cooled and aged for 12 hours, filtered, and used The filter residue was washed with deionized water until neutral, dried at 120°C for 16 hours, and then ground to obtain the active cryptopotassium manganese ore product.

Embodiment 3

[0027] Weigh 8g of oceanic manganese nodule ammonia leaching residue, wash with deionized water for 3 times, then filter with suction, then dissolve in 0.6mol / L sulfuric acid solution, stir for 10min, mix with 11.2g of ammonium persulfate solution, and use 0.5mol / L of KOH and H 2 SO 4 The pH value of the solution was adjusted to 5, and then the mixed solution was poured into a polytetrafluoroethylene-lined high-pressure hydrothermal kettle to about 80%, kept at a temperature of 160°C under an external heat source for 6 hours, naturally cooled and aged for 24 hours, filtered, and used The filter residue was washed with deionized water until neutral, dried at 120°C for 16 hours, and then ground to obtain the active cryptopotassium manganese ore product.

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Abstract

The invention discloses a preparation method of active cryptomelane, which is characterized in that ocean polymetallic nodule ammonia leaching residue is adopted as a raw material, and the active cryptomelane is prepared by heating and modifying through a wet process. The preparation method comprises the following steps that: the ocean polymetallic nodule ammonia leaching residue is dissolved in acid and filtered, the filtrate is uniformly mixed with persulfate, ammonium persulfate, potassium permanganate or potassium chlorate solution, and the pH value is adjusted to 0 to 9 by KOH or H2SO4; and then the mixture is heated and modified through the wet process, aged for 12 to 24h, filtered, washed and dried, and the active cryptomelane is prepared. The preparation method of active cryptomelane takes hydrometallurgy tailing as the main raw material, has far lower preparation cost than that of the preparation method of the traditional active cryptomelane and simple process, and is easy to be operated. The active cryptomelane prepared by the preparation method can serve as a catalyst of oxidation-reduction reaction, an alkali metal ion-sieve and the like.

Description

technical field [0001] The invention discloses a preparation method of active cryptopotassium manganese ore, and in particular relates to the preparation of active cryptopotassium manganese ore by adopting the ammonia leaching residue of oceanic polymetallic nodules as raw materials and adopting a wet heating modification method. Background technique [0002] Belonging to α-MnO in recent years 2 The type of cryptopotassium manganese ore has achieved good results as redox catalyst materials, energy storage materials, sensor materials and new ion sieve materials. It has been extensively studied in optics, informatics and energy storage. Researchers also use it as a relevant structure-function research material. Although there are many related studies on cryptopotassium manganese ore, the synthesis of cryptopotassium manganese ore in the past is based on the use of pure inorganic manganese salts or oxides or even organic manganese salts as raw materials in the laboratory, whic...

Claims

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Application Information

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IPC IPC(8): C22B7/00C01G45/02C22B3/04
CPCY02P10/20
Inventor 叶瑛孙杰夏枚生张路李秀悌高奇东姚志通陈雪刚韩沉花李海晏朱旭恒谭盛恒丁茜张奥博刘利光
Owner ZHEJIANG UNIV
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