Prepn process of aluminium chloride polymer as water purifier

A technology of polyaluminum chloride and water purifying agent, which is applied in the direction of flocculation/sedimentation water/sewage treatment, etc., can solve the problems of poor water purification effect, long flocculation response time, low aluminum extraction rate, etc. The effect is obvious and the market prospect is broad

Inactive Publication Date: 2005-04-27
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, non-metallic minerals such as coal gangue are mainly used in China to prepare polyaluminum chloride water purifiers, but the extraction rate of aluminum is low, the water purification treatment effect is poor, the flocculation response time is long, and the sewage settlement time reaches 3 to 4 hours.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] First, kaolin raw ore is dried in a drying oven at a drying temperature of 200°C and a drying time of 2 hours; then it is calcined in a muffle furnace at 650°C with an annealing time of 1 hour; then 200 kg of processed kaolin raw ore is weighed and placed In the reactor, add 240 liters of tap water to make a slurry; then use 36 grams of sodium hexametaphosphate for dispersion treatment, use 60 grams of oxalic acid and 32 grams of concentrated hydrochloric acid for oxidation and impurity removal treatment, and use 100 grams of hydrosulfite for reduction For impurity removal treatment, the mixture was stirred for 20 minutes and filtered, then added 240L of water and stirred evenly to form a slurry; followed by aging for 2 hours, after centrifugation, 200 liters of water and 218 kg of concentrated hydrochloric acid were added to the filter residue, and 90 Reaction at ℃ for 3 hours; centrifuge again to treat the reactant: the filtrate is concentrated by half to obtain a liqu...

Embodiment 2

[0017] Firstly, kaolin raw ore is dried in a drying oven at a drying temperature of 200°C and a drying time of 2 hours; then it is calcined at 650°C in a muffle furnace with an annealing time of 2 hours; In the reactor, add 240 liters of tap water to make a slurry; then use 36 grams of sodium hexametaphosphate for dispersion treatment, use 60 grams of oxalic acid and 32 grams of concentrated hydrochloric acid for oxidation and impurity removal treatment, and use 100 grams of hydrosulfite for reduction For impurity removal treatment, the mixture was stirred for 20 minutes and filtered, then added 240L of water and stirred evenly to form a slurry; followed by aging for 2 hours, after centrifugation, 200 liters of water and 218 kg of concentrated hydrochloric acid were added to the filter residue, and 90 Reaction at ℃ for 3 hours; centrifuge again to treat the reactant: the filtrate is concentrated by half to obtain a liquid-phase water purifier or spray-dried to obtain a solid-ph...

Embodiment 3

[0019] Firstly, kaolin raw ore is dried in a drying oven at a drying temperature of 200°C and a drying time of 2 hours, and then calcined in a muffle furnace at 700°C with an annealing time of 2 hours; then weigh 200 kg of the processed kaolin raw ore and place In the reactor, add 240 liters of tap water to make a slurry; then use 36 grams of sodium hexametaphosphate for dispersion treatment, use 60 grams of oxalic acid and 32 grams of concentrated hydrochloric acid for oxidation and impurity removal treatment, and use 100 grams of hydrosulfite for reduction For impurity removal treatment, the mixture was stirred for 20 minutes and filtered, then added 240L of water and stirred evenly to form a slurry; followed by aging for 2 hours, after centrifugation, 200 liters of water and 218 kg of concentrated hydrochloric acid were added to the filter residue, and 90 Reaction at ℃ for 3 hours; centrifuge again to treat the reactant: the filtrate is concentrated by half to obtain a liqui...

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PUM

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Abstract

The process of preparing aluminum chloride polymer as water purifier with kaolin mineral includes drying kaolin mineral, calcinations at 600-750 deg.c, adding water to compound slurry, ageing, centrifugally separating, reacting in a reactor at 85-95 deg.c for 3 hr, centrifugally treating reaction product, concentrating filtrate to obtain liquid purifier or spray drying to obtain solid purifier, and treating filter residue through secondary eliminating impurity, centrifugal treating and drying to obtain white carbon black as excellent stuffing. The preparation process has aluminum utilization up to 95 %, and the water purifier has average grain size smaller than 40 nm, high water treating effect, high sludge depositing speed and low production cost.

Description

Technical field: [0001] The invention relates to the field of environmental functional materials, in particular to a method for preparing a polyaluminum chloride water purifier by using kaolin minerals. Background technique: [0002] At present, non-metallic minerals such as coal gangue are mainly used as raw materials to prepare polyaluminum chloride water purifiers in China, but the extraction rate of aluminum is low, the water purification treatment effect is poor, the flocculation response time is long, and the sewage settlement time reaches 3 to 4 hours. Invention content: [0003] The purpose of the present invention is to overcome the deficiencies of the prior art, and to provide a method for preparing polyaluminum chloride water purifying agent by using high-yield kaolin minerals. The method is not only simple and effective, but also has a high extraction rate of aluminum. The water agent has an obvious effect on water treatment, and the sludge settling speed is im...

Claims

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Application Information

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IPC IPC(8): C02F1/52
Inventor 尹荔松周克省胡照文周良玉孔德明
Owner CENT SOUTH UNIV
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