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Method for reproduction by using polyaluminium chloride residue

A technology of polyaluminum chloride and its production method, which is applied in the chemical industry, can solve problems such as loss, environmental pollution, and waste, and achieve the effects of increasing profits, reducing environmental hazards, and reducing waste emissions

Inactive Publication Date: 2010-03-17
倪明锋
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The residue contains undissolved aluminum ions, which causes a lot of loss and waste, and pollutes the environment
It is an unresolved problem in the production process of polyaluminum chloride

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] First, the aluminum-containing residues produced after the reaction of bauxite or calcium aluminate powder with acid solution to produce polyaluminum chloride are collected and transported to the production workshop.

[0019] Then collect the aluminum-containing residue, divide it into 500 kg, pour a portion of the aluminum-containing residue into the mixer for stirring, and slowly add sodium hydroxide with a concentration of 20%, so that the aluminum-containing residue is completely dissolved in the In sodium hydroxide, when the pH value reaches 9-10, stop adding sodium hydroxide and stop stirring to obtain an intermediate solution.

[0020] Pour the intermediate solution into the reaction tank again, add 1000 kilograms of hydrochloric acid concentration in the intermediate solution and be 12%, the aluminum-containing hydrochloric acid that the aluminum content is 5%, stir evenly, make the pH value reach 4-5, leave standstill 8 hours, namely 1,200 kg of liquid polyalum...

Embodiment 2

[0023] First, the aluminum-containing residues produced after the reaction of bauxite or calcium aluminate powder with acid solution to produce polyaluminum chloride are collected and transported to the production workshop.

[0024] Then collect the aluminum-containing residue, divide it into 500 kg, pour a portion of the aluminum-containing residue into the mixer for stirring, and slowly add sodium hydroxide with a concentration of 10%, so that the aluminum-containing residue is completely dissolved in the In sodium hydroxide, when the pH value reaches 9-10, stop adding sodium hydroxide and stop stirring to obtain an intermediate solution.

[0025] Pour the intermediate solution into the reaction tank again, add 1000 kilograms of hydrochloric acid in the intermediate solution, the concentration of hydrochloric acid is 12%, and the aluminum content is 5% aluminum-containing hydrochloric acid, stir evenly, make the pH value reach 4-5, leave standstill for 7.5 hours, that is 1,2...

Embodiment 3

[0027] First, the aluminum-containing residues produced after the reaction of bauxite or calcium aluminate powder with acid solution to produce polyaluminum chloride are collected and transported to the production workshop.

[0028] Then collect the aluminum-containing residue, divide it into 500 kg, pour a portion of the aluminum-containing residue into the mixer for stirring, and slowly add sodium hydroxide with a concentration of 30%, so that the aluminum-containing residue is completely dissolved in the In sodium hydroxide, when the pH value reaches 9-10, stop adding sodium hydroxide and stop stirring to obtain an intermediate solution.

[0029] Pour the intermediate solution into the reaction tank again, add 1000 kilograms of hydrochloric acid concentration in the intermediate solution and be 12%, the aluminum-containing hydrochloric acid that contains aluminum is 5%, stir evenly, make the pH value reach 4-5, leave standstill 7 hours, namely 1,200 kg of liquid polyaluminu...

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PUM

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Abstract

The invention relates to a method for reproduction by using polyaluminium chloride residue, belonging to a chemical engineering method. The method comprises the following steps: a great amount of residue, generated in the production of polyaluminium chloride which is obtained by the reaction of bauxite or calcium aluminate powder with acid liquor, reacts with alkali liquor to extract the polyaluminium chloride. The method has the advantages of being reasonable in design, and capable of effectively recycling aluminium ion in residue, effectively lightening environmental pollution and saving theproduction cost.

Description

technical field [0001] The invention relates to a method for reproducing by utilizing polyaluminum chloride residue, which belongs to a chemical method. Background technique [0002] Existing utilization of bauxite or calcium aluminate powder and acid solution to produce a large amount of residue (viscous shape) produced after polyaluminum chloride, as Chinese publication number is 101456576 invention patent application has just disclosed a kind of polyaluminum chloride The preparation method of aluminum is specifically a method for producing polyaluminum chloride by using waste acid. Put aluminum-containing waste acid or waste acid in the reactor, add waste aluminum or bauxite at the same time, make full use of the heat energy of the exothermic reaction between waste acid and aluminum for preheating, and then supplement heating to a temperature of 95-105°C, keep for 3 -5 hours to complete polymerization. Precipitation or filtration for product separation and enrichment. ...

Claims

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Application Information

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IPC IPC(8): C01F7/56B09B3/00
Inventor 倪明锋
Owner 倪明锋
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