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Production process of high-purity polyaluminum chloride

A technology of polyaluminum chloride and production process, applied in aluminum chloride, aluminum halide, chemical industry and other directions, can solve the problem that high-purity polyaluminum chloride cannot be satisfied, achieve good extraction effect and selectivity, and facilitate recycling , the effect of high stability

Pending Publication Date: 2022-07-05
HENGYANG JIANHENG IND DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, most domestic ore raw materials are used to produce PAC products, which have the advantages of low production cost and good coagulation effect. However, due to the high mass fraction of iron in domestic ores (about 1%-4%), the products contain a large amount of calcium ions and metal iron ions, which cannot meet the market's requirements for high-purity, high-basic polyaluminum chloride

Method used

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  • Production process of high-purity polyaluminum chloride
  • Production process of high-purity polyaluminum chloride

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A high-purity polyaluminum chloride production process, comprising the following steps:

[0026] (1) Acid hydrolysis: add hydrochloric acid and water to the reactor, stir evenly, add calcium aluminate powder, the molar ratio of hydrochloric acid to calcium aluminate powder is n(Cl): n(Al)= 4:1, the solid-to-liquid ratio of calcium aluminate powder and water is 1:9, the temperature is raised to 80 °C, stirred for 1 h, and filtered to obtain a mixed solution;

[0027] (2) Extraction: add the extractant and the mixed solution prepared in step (1) into the extraction tank, the extractant is prepared by mixing the diluent and bis(2-ethylhexyl) phosphate with a volume ratio of 1:1, and the diluent is prepared by mixing It is prepared by mixing petroleum ether and benzene with a volume ratio of 1:1, the volume ratio of the extractant to the mixed solution is 1:1, mechanical stirring for 0.5h, static stratification, and separation of the aqueous phase and the organic phase;

...

Embodiment 2

[0032] A high-purity polyaluminum chloride production process, comprising the following steps:

[0033] (1) Acid hydrolysis: add hydrochloric acid and water to the reactor, stir evenly, add calcium aluminate powder, the molar ratio of hydrochloric acid to calcium aluminate powder is n(Cl): n(Al)= 4.5:1, the solid-to-liquid ratio of calcium aluminate powder and water is 1:9, the temperature is raised to 85°C, kept stirring for 2h, and filtered to obtain a mixed solution;

[0034] (2) Extraction: add the extractant and the mixed solution prepared in step (1) into the extraction tank, the extractant is prepared by mixing the diluent and bis(2-ethylhexyl) phosphate with a volume ratio of 1:1, and the diluent is prepared by mixing It is prepared by mixing petroleum ether and benzene with a volume ratio of 1:1, the volume ratio of the extractant to the mixed solution is 1:1, mechanical stirring for 0.5h, static stratification, and separation of the aqueous phase and the organic phas...

Embodiment 3

[0039] A high-purity polyaluminum chloride production process, comprising the following steps:

[0040] (1) Acid hydrolysis: add hydrochloric acid and water to the reactor, stir evenly, add calcium aluminate powder, and the molar ratio of hydrochloric acid to calcium aluminate powder is n(Cl): n(Al)= 5:1, the solid-to-liquid ratio of calcium aluminate powder and water is 1:10, the temperature is raised to 90 °C, stirred for 2 hours at a temperature, and filtered to obtain a mixed solution;

[0041] (2) Extraction: add the extractant and the mixed solution prepared in step (1) into the extraction tank, the extractant is prepared by mixing the diluent with a volume ratio of 1:2 and two (2-ethylhexyl) phosphate, and the diluent is prepared by mixing It is prepared by mixing petroleum ether and benzene with a volume ratio of 1:1, the volume ratio of the extractant to the mixed solution is 1:1, mechanical stirring for 1 hour, static layering, and separation of the aqueous phase and...

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Abstract

The invention discloses a production process of high-purity polyaluminum chloride, and relates to the technical field of production of inorganic water purifiers, the production process of high-purity polyaluminum chloride comprises the following steps: (1) performing acidolysis on hydrochloric acid, water and calcium aluminate powder to obtain a mixed solution; (2) carrying out extraction separation on an extraction agent and the mixed solution in an extraction tank; (3) curing the water phase obtained in the step (2) to obtain a polyaluminum chloride solution; and (4) carrying out spray drying on the polyaluminum chloride solution to obtain the high-purity polyaluminum chloride. The prepared high-purity aluminum chloride has the characteristics of high purity and high basicity, is low in iron and calcium particle content, and is suitable for the field of drinking water treatment.

Description

technical field [0001] The invention relates to the technical field of production of inorganic water purifiers, in particular to a production process of high-purity polyaluminum chloride. Background technique [0002] The general water treatment methods include flocculation, slow release, scale inhibition, sterilization, deoxidation, defoaming, etc. Among them, the flocculation method has the advantages of economical efficiency, simple operation, etc., and is one of the most commonly used methods in the field of water treatment at home and abroad. Flocculants are substances that precipitate flocs from solutes, colloids or suspended solids in a solution, and are used to improve the sedimentation and filtration effects of fine solids in the process of solid-liquid separation and water treatment. The currently used flocculants can be divided into inorganic flocculants, organic flocculants and microbial flocculants according to their components. Among them, polyaluminum chlorid...

Claims

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Application Information

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IPC IPC(8): C01F7/56
CPCC01F7/56C01P2006/80Y02P20/10
Inventor 刘运生刘晓菲欧阳承文
Owner HENGYANG JIANHENG IND DEV