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Method for preparing polyaluminum chloride water purifier by utilization of kaolinite

A technology of polyaluminum chloride and kaolinite, which is applied in the direction of flocculation/sedimentation water/sewage treatment, etc., can solve the problems of waste of raw materials, low basicity, high production cost, etc., and achieve reduced production costs, strong adsorption capacity, The effect of low processing cost

Inactive Publication Date: 2016-08-24
枣庄民兴化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, there are many synthetic methods for preparing polyaluminum chloride. According to different raw materials, they can be divided into metal aluminum method, activated aluminum hydroxide method, aluminum oxide method, aluminum chloride method, etc., but in the actual production process There are still some deficiencies, such as: the product quality is not easy to control, the alkaline production process is difficult, the equipment investment is large and the amount of alkali used is large, the pH control costs raw materials, the cost is high, and the basicity of the polyaluminum chloride produced is relatively low. Low, high sodium chloride content, high raw material consumption, low alumina content in solution, high industrial production costs

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  • Method for preparing polyaluminum chloride water purifier by utilization of kaolinite

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Embodiment 1: a kind of method utilizing kaolinite to prepare polyaluminum chloride water purifying agent, its technological process is:

[0015] 1). Crushing treatment: pulverize the kaolinite with a pulverizer, and sieve the sieve with a pore size of less than 0.5cm.

[0016] 2). Roasting modification: Put the pulverized and sieved kaolinite powder into an electric furnace for roasting to make it modified. The material is roasted at low temperature in the electric furnace, and roasted at medium temperature

[0017] and high-temperature roasting in three stages. The low-temperature roasting temperature is 300°C, and the roasting time is 2 hours; the medium-temperature roasting temperature is 500°C, and the roasting time is 3 hours; the high-temperature roasting temperature is 800°C, and the roasting time is 2 hours. Then chill for 3 hours.

[0018] 3). Remove impurities: Weigh 1000 kg of kaolinite powder into the reaction tank and add water to mix. The ratio of kaol...

Embodiment 2

[0023] Embodiment 2: a kind of method utilizing kaolinite to prepare polyaluminum chloride water purifying agent, its technological process is:

[0024] 1). Crushing treatment: pulverize the kaolinite with a pulverizer, and sieve the sieve with a pore size of less than 0.5cm.

[0025] 2). Roasting modification: Put the pulverized and sieved kaolinite powder into an electric furnace for roasting to make it modified. The material goes through three stages of low temperature roasting, medium temperature roasting and high temperature roasting in the electric furnace. The low-temperature roasting temperature is 300°C, and the roasting time is 2 hours; the medium-temperature roasting temperature is 500°C, and the roasting time is 3 hours; the high-temperature roasting temperature is 800°C, and the roasting time is 2 hours. Then chill for 3 hours.

[0026] 3). Remove impurities: Weigh 2000 kg of kaolinite powder into the reaction tank and add water to mix. The ratio of kaolinite po...

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Abstract

The invention aims to overcome deficiency of the prior art so as to provide a method for preparing a polyaluminum chloride water purifier by the utilization of kaolinite. By the method, the product contains fewer impurities, has high purity and has better using effects. In order to achieve the above purpose, the technological process of the technical scheme comprises the following steps: 1) crushing treatment; 2) modification by calcination; 3) removal of impurities; 4) preparation of aluminium chloride; 5) preparation of crystalline aluminum chloride; and 6) preparation of a finished product. The invention has the following beneficial effects: extraction rate of aluminum is high; the product contains fewer impurities, has high purity, has no mixed color, and has better using effects; and reclamation rate of the raw material is high, the raw material is saved, and production cost is reduced. The method of the invention is suitable for industrial production of polyaluminum chloride.

Description

Technical field: [0001] The invention relates to a method for polyaluminum chloride water purifying agent, which belongs to the technical field of chemical industry, in particular to a method for preparing polyaluminum chloride water purifying agent by using kaolinite. Background technique: [0002] Polyaluminum chloride is a new water purification material, inorganic polymer coagulant, also known as polyaluminum for short, due to the bridging effect of hydroxide ions and the polymerization of polyvalent anions, the molecular weight and charge Higher inorganic polymer water treatment agent. Polyaluminium chloride has the advantages of good spray drying stability, wide water area, fast hydrolysis speed, strong adsorption capacity, large alum flower formation, fast sedimentation, low turbidity of effluent, and good dehydration performance. , the dosage of spray-dried polyaluminium chloride is reduced, especially in the case of poor water quality, the dosage of spray-dried pro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/52
Inventor 种法民
Owner 枣庄民兴化工有限公司