Method for producing Friedel's salt from aluminum-containing waste hydrochloric acid and aluminum-containing sludge in electrode foil industry

A technology of electrode foil and aluminum sludge, which is applied in chemical instruments and methods, aluminum compounds, alkali metal oxides/hydroxides, etc., can solve the problems of complex process and high cost, and achieve the effect of extensive economic value

Active Publication Date: 2020-01-10
NANTONG HAIXING ELECTRONICS +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, Fred's salt is mainly produced through hydration, but the process is complicated and the cost is high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] A method for producing Fred's salt by using aluminum-containing waste hydrochloric acid and aluminum-containing sludge in the electrode foil industry, comprising the following steps: mixing the electrode foil aluminum-containing waste hydrochloric acid and aluminum-containing sludge, and synchronously adding an alkalizing agent and a regulator solution, adjust the pH and calcium-aluminum content ratio, and stir at a high speed to form a reaction system, which will generate a milky white slurry within a certain reaction time, which is Fred's salt; the mass concentration of aluminum-containing waste hydrochloric acid in the electrode foil The mass concentration of aluminum-containing sludge is about 1%; the aluminum-containing sludge is the aluminum-containing sludge produced by the neutralization of waste acid or waste water in electrode foil enterprises, and the solid components are aluminum hydroxide and calcium chloride As the main component, the water content is 45%; ...

Embodiment 2

[0016] A method for producing Fred's salt by using aluminum-containing waste hydrochloric acid and aluminum-containing sludge in the electrode foil industry, comprising the following steps: mixing the electrode foil aluminum-containing waste hydrochloric acid and aluminum-containing sludge, and synchronously adding an alkalizing agent and a regulator solution, adjust the pH and calcium-aluminum content ratio, and stir at a high speed to form a reaction system, which will generate a milky white slurry within a certain reaction time, which is Fred's salt; the mass concentration of aluminum-containing waste hydrochloric acid in the electrode foil The mass concentration of aluminum-containing sludge is about 5%; the aluminum-containing sludge is the aluminum-containing sludge produced by the neutralization of waste acid or waste water in electrode foil enterprises, and the solid components are aluminum hydroxide and calcium chloride As the main component, the water content is 85%; ...

Embodiment 3

[0018] A method for producing Fred's salt by using aluminum-containing waste hydrochloric acid and aluminum-containing sludge in the electrode foil industry, comprising the following steps: mixing the electrode foil aluminum-containing waste hydrochloric acid and aluminum-containing sludge, and synchronously adding an alkalizing agent and a regulator solution, adjust the pH and calcium-aluminum content ratio, and stir at a high speed to form a reaction system, which will generate a milky white slurry within a certain reaction time, which is Fred's salt; the mass concentration of aluminum-containing waste hydrochloric acid in the electrode foil 8%, and the mass concentration of aluminum-containing sludge is about 3%; the aluminum-containing sludge is the aluminum-containing sludge produced by the neutralization of waste acid or waste water in electrode foil enterprises, and the solid components are aluminum hydroxide and calcium chloride As the main component, the water content ...

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PUM

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Abstract

The invention discloses a method for producing a Friedel's salt from aluminum-containing waste hydrochloric acid and aluminum-containing sludge in the electrode foil industry. The method comprises thefollowing steps: mixing electrode foil aluminum-containing waste hydrochloric acid with aluminum-containing sludge, synchronously adding an alkalizer and a regulator solution to regulate the pH valueand the calcium-aluminum content ratio, performing stirring at a high rotating speed to form a reaction system, and performing a reaction for a certain time to generate a milky white slurry that is the Friedel's salt. The raw materials of the whole production process are all from wastes in the production process, and aluminum ions in the waste acid and calcium ions in the sludge are recycled, sothe whole process meets the requirements of clean production; and the operation conditions are normal temperature and normal pressure, so the method is simple and operable and has wide economic values.

Description

technical field [0001] The invention belongs to the field of resource utilization in the electrode foil industry, and relates to a method for producing Fred's salt by using aluminum-containing waste hydrochloric acid and aluminum-containing sludge in the electrode foil industry. Background technique [0002] In the corrosion stage of the electrode foil industry, electronic light foil is used as raw material, and chemical corrosion is carried out through electrochemical corrosion and hydrochloric acid solution, and a large amount of aluminum-containing waste hydrochloric acid will be produced in the corrosion section. At present, in the industry, the pH is neutralized by alkaline substances (lime milk solution), and then the sedimentation treatment is carried out with coagulants and flocculants to simultaneously produce press-filtered aluminum-containing sludge. This treatment process has two major drawbacks. The first is that a large amount of alkaline substances and floccul...

Claims

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Application Information

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IPC IPC(8): C01F7/00B01J20/08B01J20/28B01J20/30
CPCB01J20/08B01J20/2804C01P2002/22C01F7/78
Inventor 严季新陈小锋金焕冬施赛健施亚星
Owner NANTONG HAIXING ELECTRONICS
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