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Preparation method of jarosite

A technology of jarosite and potassium permanganate, which is applied in the field of sulfate mineral preparation, can solve the problems of unfriendly environment, high preparation cost, and many reagents, and achieve the effects of simple process, mild reaction conditions, and easy operation

Active Publication Date: 2013-06-05
JIANGSU UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantages of this method are: (1) The preparation cost is high; (2) The preparation process of Thiobacillus ferrooxidans resting cells is complicated
(3) The product has no regular shape
The disadvantages of this method are: (1) more reagents are used, which is not friendly to the environment

Method used

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  • Preparation method of jarosite
  • Preparation method of jarosite
  • Preparation method of jarosite

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1）

[0020] The preparation method of the jarosite of the present embodiment is as follows:

[0021] Dissolve 2.0 g of ammonium ferrous sulfate hexahydrate in 15 mL of distilled water, add 0.2 g of potassium permanganate while stirring, then transfer the mixed solution into a hydrothermal reaction kettle, and heat the reaction system temperature under airtight conditions to 140°C, and carried out hydrothermal reaction at this temperature for 16h.

[0022] After the reaction is over, cool the reacted material naturally, filter, then wash the solid with distilled water and absolute ethanol in turn, and finally vacuum-dry it at a temperature of 80°C for 2 hours, and the air pressure in the drying oven is 0.02MPa to obtain a solid with a regular shape. And basically octahedral structure of jarosite powder, see figure 1 .

Embodiment 2～ Embodiment 6）

[0024] Each embodiment is basically the same as Embodiment 1, and the differences are shown in Table 1.

[0025] Table 1

[0026]

[0027] .

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Abstract

The invention discloses a preparation method of jarosite. The jarosite is prepared by carrying out hydrothermal reaction on potassium permanganate and hexahydrated ammonium ferrous sulfate. Specifically, the preparation method of the jarosite comprises the following steps of: dissolving the hexahydrated ammonium ferrous sulfate and potassium permanganate in water in a weight ratio of 15:2 to 20:1; placing the solution to a sealed hydrothermal reaction kettle for being heated the solution to 100 DEG C to 200 DEG C to carry out hydrothermal reaction for 2 hours to 16 hours; and performing post-treatment to obtain jarosite after the reaction is finished. The preparation method of the jarosite disclosed by the invention has the advantages of being simple in process, convenient to operate and suitable for industrial production; moreover, the reaction conditions are gentle without solvent pollution, and so the preparation method belongs to a green synthesis process. According to the preparation method of the jarosite disclosed by the invention, the jarostie with a regular appearance and an octahedral structure or an octahedral section structure can be finally obtained by controlling the reaction temperature, the reaction time and the weight ratio of the hexahydrated ammonium ferrous sulfate to the potassium permanganate.

Description

technical field [0001] The invention relates to a preparation method of sulfate minerals, in particular to a preparation method of jarosite. Background technique [0002] Jarosite is a rare and expensive ochre-yellow inorganic pigment with excellent performance. It has the characteristics of strong hiding power, good weather resistance, non-toxicity and acid resistance. [0003] Since jarosite is neither soluble in dilute acid, but also easy to precipitate, wash and filter, under certain temperature, acidity and the presence of ammonium or alkali metal ions, ferric ions in the solution can form The jarosite is precipitated, thereby removing iron from the leach solution. This characteristic of jarosite makes it have important application prospects in the field of environmental science. [0004] The preparation of jarosite mainly includes biosynthesis and chemical synthesis. The advantage of biosynthesis is that the preparation process is simple and the preparation cycle is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G49/00
Inventor 李中春
Owner JIANGSU UNIV OF TECH
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