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Iron extracting and removing method of aluminum sulfate solution

A sulfuric acid solution, aluminum sulfate technology, applied in liquid solution solvent extraction, aluminum sulfate, aluminum sulfur compounds and other directions, can solve the problems of shortening extraction time, extraction rate and back-extraction rate, etc., to shorten extraction time, easy to recycle, The effect of improving extraction efficiency

Inactive Publication Date: 2010-03-03
JINAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to address the deficiencies in the prior art, to provide a method that can effectively solve the problem of extraction and phase separation, thereby shortening the extraction time, and having a higher extraction rate and stripping rate. Extraction and removal of iron from aluminum sulfate solution

Method used

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  • Iron extracting and removing method of aluminum sulfate solution

Examples

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Effect test

Embodiment 1

[0025] In this example, the extraction system of primary amine N-1923 + kerosene + n-octanol is selected, wherein the primary amine N-1923 accounts for 25% by volume of the entire extraction system, and the modifier n-octanol accounts for the volume of the entire extraction system The percentage content is 25%, the volume ratio (O / A) of the organic phase and the water phase in the extraction system is 1:2, and after static extraction for 2-4 minutes, the extraction rate of iron in the aluminum sulfate solution is 100%.

[0026] In this embodiment, sodium chloride solution is selected as the stripping agent, the concentration of the sodium chloride solution is 2.0 mol / L, and the stripping rate is 98.02%.

[0027] In this embodiment, sulfuric acid solution is selected as the stripping agent, and when the concentration of the sulfuric acid solution is 4.0 mol / L, the stripping rate is 98.67%.

Embodiment 2

[0029] In this example, the extraction system of primary amine N-1923 + kerosene + n-octanol is selected, wherein the primary amine N-1923 accounts for 25% by volume of the entire extraction system, and the modifier n-octanol accounts for the volume of the entire extraction system The percentage content is 10%, the volume ratio (O / A) of the organic phase and the water phase in the extraction system is 1:2, and after static extraction for 5-10 minutes, the extraction rate of iron in the aluminum sulfate solution is 100%.

[0030] In this embodiment, sodium chloride solution is selected as the stripping agent, the concentration of the sodium chloride solution is 2.0 mol / L, and the stripping rate is 94.84%.

[0031] In this embodiment, sulfuric acid solution is selected as the stripping agent. When the concentration of the sulfuric acid solution is 4.0 mol / L, the stripping rate is 95.30%.

Embodiment 3

[0032] Example 3 Effect of n-octanol on extraction system

[0033] In this example, the effect of n-octanol on the entire extraction system is studied by comparing the addition of n-octanol and the absence of n-octanol in the extraction system.

[0034] 1. The extraction system does not add n-octanol

[0035] The extraction system is primary amine N-1923+kerosene, wherein primary amine N-1923 accounts for 25% of the total volume of the entire extraction system, and kerosene accounts for 75% of the total volume of the entire extraction system.

[0036] The extraction system was used to stand still to extract the aluminum sulfate solution, and it was found that the water phase and the oil phase were cloudy and could not be separated.

[0037] 2. Add n-octanol to the extraction system

[0038] The extraction system is primary amine N-1923 + n-octanol + kerosene, wherein primary amine N-1923 accounts for 25% of the total volume of the entire extraction system, kerosene accounts ...

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Abstract

The invention discloses a iron extracting and removing method of aluminum sulfate solution. The extraction system of the invention is composed of primary amine N-1923, kerosene and n-caprylic alcohol,wherein, the n-caprylic alcohol accounts for 5-30% of the whole extraction system in percentage by volume. The invention also comprises a re-extraction system taking sodium chloride solution or sulfuric acid solution as a re-extraction preparation. The invention is characterized in that n-caprylic alcohol is added in primary amine and kerosene extraction systems, which can effectively solve the problem of extracting phase-splitting and shorten extracting time. The invention optimizes the using amount of n-caprylic alcohol, sodium chloride solution concentration and sulfuric acid solution concentration so as to improve extraction efficiency and re-extraction efficiency. The extraction system of the invention can effectively extract iron in industrial aluminum sulfate solution, and non-ironaluminum sulfate products obtained by extraction conform to low-iron requirement on aluminum sulfate for industries, such as papermaking, printing, dyeing and the like, so that the invention has verygreat significance for practical industrial application.

Description

technical field [0001] The invention relates to the field of chemical industry, in particular to hydrometallurgy and preparation of inorganic salts, in particular to a method for extracting and removing iron from an aluminum sulfate solution. Background technique [0002] my country's aluminum sulfate industry has developed rapidly, but there are still many problems. As far as its quality is concerned, my country's high-quality bauxite resources are poor, and most of the bauxite contains high iron content, so the industrial aluminum sulfate produced has a high iron content. Generally, the iron content is more than 0.3%. This kind of high-iron aluminum sulfate can only be used as a general water purifier. Because this type of aluminum sulfate contains iron impurities, the surface of aluminum sulfate is colored, so it cannot be used in the manufacture of high-grade paper. It limits its application in fields such as papermaking and fabrics. [0003] At present, the domestic prod...

Claims

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Application Information

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IPC IPC(8): C01F7/74B01D11/04
Inventor 李明玉何智媚唐启红
Owner JINAN UNIVERSITY
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