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Preparation method of green vitriol

A technology of green alum and evaporative crystallization, applied in the direction of ferric sulfate, etc., can solve the problems of low purity and high cost of green alum, and achieve the effect of wide source and high purity

Inactive Publication Date: 2017-11-03
佛山市诚新泰不锈钢制品有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The by-product ferrous sulfate can be obtained through freezing and crystallization, but this method has high cost and low purity of green vitriol

Method used

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  • Preparation method of green vitriol
  • Preparation method of green vitriol

Examples

Experimental program
Comparison scheme
Effect test

Embodiment example 1

[0014] refer to figure 1 , the preparation method of a kind of vitriol of the present invention comprises the following steps:

[0015] Wash a portion of scrap iron with alcohol, then wash and dry with distilled water, add a portion of 3mol / L sulfuric acid and keep stirring, filter the resulting solution, place an iron block on the filtered filter paper, and put the filtrate in Evaporate and crystallize by heating in a nitrogen atmosphere. When the solution has an obvious crystal film, measure the temperature with a thermometer and keep the temperature at 45 degrees. When 1 / 5 of the solution is left, filter the mixture, slowly add the obtained filter residue to distilled water and stir to heat Until the crystals are completely dissolved, the solution is evaporated and crystallized, the temperature is kept at 45 degrees, and the purity of ferric sulfate is measured by infrared spectroscopy.

Embodiment 2

[0017] refer to figure 1 , the preparation method of a kind of vitriol of the present invention comprises the following steps:

[0018] Wash a portion of scrap iron with alcohol, then wash and dry with distilled water, add a portion of 3mol / L sulfuric acid and keep stirring, filter the resulting solution, place an iron block on the filtered filter paper, and put the filtrate in Heating, evaporating and crystallizing in a nitrogen atmosphere, measuring the temperature with a thermometer when an obvious crystal film appears in the solution, keeping the temperature at 50 degrees, and filtering the mixture when 1 / 5 of the solution is left, slowly adding the obtained filter residue into distilled water and stirring and heating Until the crystals are completely dissolved, the solution is evaporated and crystallized, the temperature is kept at 50 degrees, and the purity of ferric sulfate is measured by infrared spectroscopy.

Embodiment 3

[0020] refer to figure 1 , the preparation method of a kind of vitriol of the present invention comprises the following steps:

[0021] Wash a portion of scrap iron with alcohol, then wash and dry with distilled water, add a portion of 3mol / L sulfuric acid and keep stirring, filter the resulting solution, place an iron block on the filtered filter paper, and put the filtrate in Evaporate and crystallize by heating in a nitrogen atmosphere. When the solution has an obvious crystal film, measure the temperature with a thermometer and keep the temperature at 55 degrees. When 1 / 5 of the solution is left, filter the mixture, slowly add the obtained filter residue to distilled water and stir to heat Until the crystals are completely dissolved, the solution is evaporated and crystallized, the temperature is kept at 55 degrees, and the purity of ferric sulfate is measured by infrared spectroscopy.

[0022] The data were combined to compare the purity of magnesium sulfate crystals at ...

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Abstract

The invention provides a preparation method of green vitriol. Industrial waste iron chips are washed by alcohol, and is dried; sulfuric acid is added; stirring, filtering, evaporative crystallization, water adding dissolution and evaporative crystallization are performed to obtain a finished product. The method is simple and practical; the manufacturing cost is low; the method is applicable to the mass production of the product.

Description

technical field [0001] The invention belongs to the field of chemical industry, in particular to a preparation method of vitriol. Background technique [0002] Green vitriol is reducing. Decomposed by high heat releases toxic gas. In the laboratory, it can be obtained by reacting copper sulfate solution with iron. Will weather in dry air. It is easily oxidized into brown-yellow basic ferric sulfate which is insoluble in water in humid air. 10% aqueous solution is acidic to litmus (Ph value about 3.7). Heating to 70~73°C loses 3 molecules of water, loses 6 molecules of water at 80~123°C, and turns into basic ferric sulfate when it is above 156°C. In industry, when ilmenite is decomposed with sulfuric acid to produce titanium dioxide, sulfurous acid is generated. Iron and ferric sulfate, ferric iron is reduced to ferrous iron with iron wire. By-product ferrous sulfate can be obtained through freezing and crystallization, but this method has high cost and low purity of gr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G49/14
CPCC01G49/14C01P2006/80
Inventor 庄宇雄
Owner 佛山市诚新泰不锈钢制品有限公司
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