Method for producing polyaluminum chloride without heating

A polyaluminum chloride, heating-free technology, applied in the direction of aluminum chloride, aluminum halide, etc., can solve the problems of unretrieved polyaluminum chloride production technology, rising production costs, and a large amount of production waste residue, so as to enrich the source of raw materials , Improve product yield, improve the effect of reaction efficiency

Inactive Publication Date: 2014-06-04
CHANGZHOU WUJIN YOUBANG WATER PURIFICATION MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method can produce polyaluminum chloride without heating, but there are still some shortcomings: (1) bauxite and calcium aluminate powder are resource-based raw materials, and their prices have been rising all the way, so they are only used as polyaluminum chloride The production cost of raw materials for the aluminum source in chemical aluminum is also increasing year by year; (2) Both bauxite and ca

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0023] Example 1

[0024] Add 40t of aluminum foil pickling waste liquid (Al203%=2.3%, HCl%=18%) and 20t of aluminum-containing waste acid in pharmaceutical intermediates (Al203%=6.3%, HCl%=5.7%) into a 100m3 insulated reactor, and stir After homogenization, a mixed acid of Al203%=3.6%, HCl%=13.9% is obtained; 33t of aluminum oxide sludge (Al203%=11%) is added, and after stirring and reacting for 60 minutes, the index of the semi-finished product is determined to be Al203%=6.05%, HCl% =0.69%, T=68°C; add 12.5t of 150 mesh calcium aluminate powder (Al203%=51.5%, Ca0%=33%), stir to dissolve, the reaction temperature rises to 90°C and start timing. After 60 minutes of reaction, PAC is obtained Primary reaction liquid: the reaction liquid is cooled to 80° C. and then filtered under pressure to obtain the finished product. After testing, the finished product is Al203% = 11.6%, B = 71.3%.

Example Embodiment

[0025] Example 2

[0026] Add 40t of aluminum foil pickling waste liquid (Al203%=1.8%, HCl%=15%), industrial hydrochloric acid 10t (HCl%=31.5%), and acid mist absorption water 10t (HCl%=8.2%) into a 100m3 insulated reactor After mixing uniformly, a mixed acid of Al203% = 1.2%, HCl% = 16.6% is obtained; adding 20t of aluminum oxide sludge (Al203% = 15.2%), stirring and reacting for 70 minutes, testing the semi-finished product index to obtain Al203% = 4.63%, HCl%=3.32%, T=75°C; add 13t of 100 mesh calcium aluminate powder (Al203%=51.5%, Ca0%=33%), stir to dissolve, the reaction temperature rises to 90°C, start timing, and it will be obtained after 80 minutes of reaction The PAC primary reaction liquid is cooled to 80° C. and then filtered under pressure to obtain the finished product. After testing, the finished product is Al203% = 11.16%, B = 77.3%.

Example Embodiment

[0027] Example 3

[0028] Add 60t of aluminum foil pickling waste (Al203%=3.1%, HCl%=16.3%) into a 100m3 insulated reactor to produce 15t of cleaning water (Al203%=1.7%, HCl%=2.1%), and stir well to obtain Al203 %=2.8%, HCl%=13.5% of mixed acid; adding 15t of aluminum oxide sludge (Al203%=25.3%), stirring and reacting for 90 minutes, testing the semi-finished product indicators to obtain Al203%=6.47%, HCl%=1.32%, T=70°C; add 12t of 200 mesh calcium aluminate powder (Al203%=51.5%, Ca0%=33%), stir to dissolve, the reaction temperature rises to 90°C and start timing. After 60 minutes of reaction, the PAC primary reaction solution is obtained. After being cooled to 80°C, the finished product was obtained by pressure filtration. After testing, the finished product was Al203%=11.76%, B=68.6%.

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Abstract

The invention discloses a method for producing polyaluminum chloride without heating. The method comprises the following concrete steps: (1) sequentially adding a waste aluminum chloride liquor generated in a Friedel-Craft reaction, an aluminiferous hydrochloric acid, an industrial hydrochloric acid and water into a heat insulating reaction kettle to prepare a mixed acid in which the percentage of Al2O3 is 1% to 4% and the percentage of HCl is 12% to 18%; (2) adding aluminum oxidized sludge into the mixed acid, stirring for 60-90 minutes until the aluminum oxidized sludge is completely dissolved, heating to the reaction temperature of 60 DEG C to 80 DEG C, controlling the percentage of the HCl in a semi-finished product to be 0.5% to 3.5% and the percentage of the Al2O3 in the semi-finished product to be not less than 5.0%; (3) adding calcium aluminate powder into a semi-finished product liquid, regulating the percentage of the Al2O3 in the reaction liquid to be 11% to 12% and the basicity of the reaction liquid to be 60% to 90%, maintaining the temperature required by the reaction by utilizing the heat generated in the reaction, timing when the temperature rises to 90 DEG C, reaction under preserved temperature for 60-90 minutes and performing a filter pressing treatment to obtain a finished polyaluminium chloride product. By adopting the method to prepare the polyaluminium chloride, the production process is simple, no steam does need to be heated, the emission of acid mist and waste slag is reduced, the production cost is lowered and the recycle of waste resources is realized; therefore, the method is an economical and practical production method which saves energy and reduces emissions.

Description

technical field [0001] The invention relates to a method for producing polyaluminum chloride without heating, in particular to a method for preparing polyaluminum chloride by using the reaction heat of aluminum oxidation sludge and calcium aluminate powder as a heat source. Background technique: [0002] As a typical flocculant product, polyaluminum chloride can be widely used in the physical and chemical treatment of industrial sewage, industrial water and domestic sewage. After years of development, although its production process has become mature, there are still some defects. Among them, one of the more prominent problems is that the production process of most processes still needs supplementary steam heating. This method not only increases the construction and maintenance costs of auxiliary equipment such as boilers, but also consumes a large amount of increasingly scarce resource energy, such as coal, natural gas, etc. Gas, etc., increase the emission of pollutants s...

Claims

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Application Information

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IPC IPC(8): C01F7/56
Inventor 赵志萍王桂玉张康明
Owner CHANGZHOU WUJIN YOUBANG WATER PURIFICATION MATERIALS
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