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A kind of production method of pure clear polyaluminum chloride

A technology of polyaluminum chloride and production method, applied in aluminum chloride, aluminum halide and other directions, can solve the problems of complex production process, many auxiliary additives, etc., and achieve the effects of high product purity, low production cost, and simple and convenient process

Active Publication Date: 2016-03-30
NANTONG KECHUN CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the prior art, waste aluminum-containing raw materials and waste hydrochloric acid, sulfuric acid and other inorganic strong acids have been used as production raw materials, realizing the dual functions of protecting resources and protecting the environment, but the production process is relatively complicated, and other auxiliary materials for production There are many additives, which cannot really achieve effective energy saving and environmental protection

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] (1) Aluminum-containing sludge pretreatment: the aluminum-containing sludge (HW17) with a water content of 75% is dried and desorbed by hot air at 80°C. After the desorption is completed, it becomes a solid aluminum-containing sludge with a water content of 8%. ;

[0020] (2) Reaction: Put 0.5 tons of 18% waste hydrochloric acid (HW34) with the brand name HW34 into the reaction kettle with a heat preservation jacket, and then slowly add 0.5 tons of solid aluminum-containing sludge desorbed in step 1, and quickly After reacting for 3 hours, continue the constant temperature reaction for 70 hours;

[0021] (3) Spray drying: spray-dry the pure polyaluminum chloride obtained in step 2, and set the spray temperature to 250°C;

[0022] (4) Water film dedusting: water is directly sprayed to dedust and deodorize the purified polyaluminum chloride tail gas in step 3.

[0023] In this embodiment, the aluminum chloride content of the finished pure polyaluminum chloride is 31%. A...

Embodiment 2

[0025] (1) Aluminum-containing sludge pretreatment: the aluminum-containing sludge (HW17) with a water mass fraction of 72% is dried and desorbed by hot air at 80°C, and after desorption is completed, it becomes a solid aluminum-containing sludge with a water content of 9% ;

[0026] (2) Reaction: Put 0.5 tons of 18% waste hydrochloric acid (HW34) with the brand name HW34 into the reaction kettle with heat preservation jacket, and then slowly add 0.6 tons of solid aluminum-containing sludge desorbed in step 1, quickly After reacting for 3 hours, continue the constant temperature reaction for 75 hours;

[0027] (3) Spray drying: spray-dry the pure polyaluminum chloride obtained in step 2, and set the spray temperature to 250°C;

[0028] (4) Water film dedusting: water is directly sprayed to dedust and deodorize the purified polyaluminum chloride tail gas in step 3.

[0029] In this embodiment, the aluminum chloride content of the finished pure polyaluminum chloride is 30%, an...

Embodiment 3

[0031] (1) Aluminum-containing sludge pretreatment: the aluminum-containing sludge (HW17) with a water content of 72% is dried and desorbed by hot air at 80°C, and after desorption is completed, it becomes a solid aluminum-containing sludge with a water content of 8.5% ;

[0032] (2) Reaction: put 0.6 tons of 18% waste hydrochloric acid (HW34) with the brand name HW34 into the reaction kettle with a heat preservation jacket, and then slowly add 0.5 tons of solid aluminum-containing sludge desorbed in step 1, quickly After reacting for 3 hours, continue the constant temperature reaction for 75 hours;

[0033] (3) Spray drying: spray-dry the pure polyaluminum chloride obtained in step 2, and set the spray temperature to 250°C;

[0034] (4) Water film dedusting: water is directly sprayed to dedust and deodorize the purified polyaluminum chloride tail gas in step 3.

[0035] In this embodiment, the aluminum chloride content of the finished pure polyaluminum chloride is 32%, and ...

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Abstract

The invention discloses a production method of pure clear polyaluminum chloride. The pure clear polyaluminum chloride is produced by using aluminum-containing sludge with the brand name HW17 and waste sulfuric acid or waste hydrochloric acid with the brand name HW34 as raw materials, specifically including aluminum-containing sludge mud pretreatment, reaction, spray drying and water film dedusting steps. The aluminum chloride content of the finished pure polyaluminum chloride of the present invention can reach 30-32.7%, the product has high purity, good fluidity, and no condensation phenomenon; the production method is simple and convenient, the production cost is low, the utilization rate of raw materials is high, and there is no pollution. , The effect of energy saving and environmental protection is remarkable; pure clear polyaluminum chloride is easily dispersed in industrial wastewater, which improves the sewage purification effect, making the removal rate of chemical oxygen demand COD reach more than 62.5%, and the removal rate of chroma reaches more than 78.1%.

Description

technical field [0001] The invention relates to a production method of pure clear polyaluminium chloride, which belongs to the field of sewage treatment agents. Background technique [0002] Aluminum chloride, also known as basic aluminum chloride or aluminum hydroxychloride, is an intermediate polymer compound between aluminum trichloride hexahydrate and aluminum hydroxide. Since pure polyaluminum chloride is polymerized through hydroxyl bridging Therefore, it is very soluble in water and can undergo hydrolysis to produce a series of physical and chemical effects such as coagulation, adsorption, and precipitation. Therefore, aluminum chloride is often used as a water treatment agent to remove impurities in water. However, due to the low concentration of the prepared pure polyaluminum chloride and difficult drying conditions, it is usually supplied as a liquid product and used in a large amount. Large, high production cost, which limits its application. [0003] Polyalumin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01F7/56
Inventor 佘友德
Owner NANTONG KECHUN CHEM