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Preparation process of polyaluminum chloride

A polyaluminum chloride and preparation technology, applied in the direction of aluminum chloride, aluminum halide, etc., can solve the problems of the final purity of polyaluminum chloride, environmental pollution, waste of hydrochloric acid, etc., to save steps, improve efficiency, reduce The effect of the possibility of decomposition

Active Publication Date: 2018-01-16
吉林紫瑞新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the principle of this reaction, it is necessary to neutralize the acidity in the mother liquor by adding ammonia water, and then remove the precipitated Al(OH) to the point. 3 Adding hydrochloric acid inside for polymerization and aging to make polyaluminum chloride, which causes a lot of waste of hydrochloric acid and also pollutes the environment, and because the BB acid mother liquor also contains organic substances such as phthalic anhydride and benzene, it is harmful to the polymerization. The final purity of aluminum chloride will also have some influence

Method used

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  • Preparation process of polyaluminum chloride
  • Preparation process of polyaluminum chloride

Examples

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Effect test

Embodiment 1

[0037] A preparation process of polyaluminum chloride, step 1: adding 100kg of BB acid mother liquor into an enamel reactor, and then slowly adding 20% ​​of the mass fraction of Hydrogen peroxide, and keep stirring, stop adding hydrogen peroxide when gas is no longer generated; step 2: raise the temperature of the enamel to 50 ℃ ~ 60 ℃, and keep it warm for 15min ~ 30min; step 3: weigh 10kg calcium powder and add it to the BB in step 1 Add an appropriate amount of washing water to the acid mother liquor, and at the same time, control the temperature of the enamel reactor at 60°C to 70°C and keep it for 1h to 2h; Step 4: After the reaction in step 3 is completed, raise the temperature of the enamel reaction to 100°C and keep it warm for 2.5 hours to obtain light yellow flocs; Step 5: Press filter, wash and dry the light yellow flocs in sequence to finally obtain liquid polyaluminum chloride finished product; Step 6: Polymerize the liquid The aluminum chloride finished product i...

Embodiment 2

[0039] A preparation process of polyaluminum chloride, step 1: adding 100kg of BB acid mother liquor into an enamel reactor, and then slowly adding 30% of the mass fraction of BB acid mother liquor to the BB acid mother liquor at a rate of 500mL / min to 1000mL / min Hydrogen peroxide, and keep stirring, stop adding hydrogen peroxide when gas is no longer generated; Step 2: Heat the enamel to 50°C-60°C, and keep it warm for 15min-30min; Step 3: Weigh 20kg of calcium powder and add it to the BB in Step 1 Add an appropriate amount of washing water to the acid mother liquor, and at the same time, control the temperature of the enamel reactor at 60°C to 70°C and keep it for 1h to 2h; Step 4: After the reaction in step 3 is completed, raise the temperature of the enamel reaction to 110°C and keep warm for 4 hours to obtain light yellow flocs; step five: press filter, wash, and blot the light yellow flocs in sequence to finally obtain liquid polyaluminum chloride finished products and te...

Embodiment 3

[0041] A preparation process of polyaluminum chloride, step 1: adding 100kg of BB acid mother liquor into an enamel reactor, and then slowly adding 25% of the mass fraction of Hydrogen peroxide, and keep stirring, stop adding hydrogen peroxide when gas is no longer generated; step 2: raise the temperature of the enamel to 50 ℃ ~ 60 ℃, and keep it warm for 15min ~ 30min; step 3: weigh 16kg calcium powder and add it to the BB in step 1 Add an appropriate amount of washing water to the acid mother liquor, and at the same time, control the temperature of the enamel reactor at 60°C to 70°C and keep it for 1h to 2h; Step 4: After the reaction in step 3 is completed, raise the temperature of the enamel reaction to 105°C and keep warm for 3.2 hours to obtain light yellow flocs; step five: press filter, wash and dry the light yellow flocs in sequence to finally obtain liquid polyaluminum chloride finished product; step six, polymerize the liquid The aluminum chloride finished product i...

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Abstract

A preparation technology of polyaluminum chloride comprises following steps: S1, 2-benzoylbenzoic acid mother liquor is added to an enamel reactor, and then hydrogen peroxide is slowly added to the 2-benzoylbenzoic acid mother liquor until no gas is generated; S2, calcium powder is added to the 2-benzoylbenzoic acid mother liquor in the step S1; S3, an appropriate amount of water is added to the 2-benzoylbenzoic acid mother liquor in the step S2, and the temperature of the enamel reactor is controlled and kept for a period of time; S4, the temperature of enamel reaction is increased and kept, and pale yellow floccules are obtained; S5, the pale yellow floccules are subjected to filter pressing, washing and suck drying sequentially, and a finished liquid product polyaluminum chloride is obtained finally; S6, the finished liquid product polyaluminum chloride is concentrated and dried, and solid powder is obtained; S7, the solid powder is subjected to grinding. With the adoption of the technology, the utilization rate of resources is increased, the purity of the product can also be guaranteed, secondary pollution to treated water due to the fact that substances such as phthalic anhydride, benzene and the like are mixed into the finished product is avoided, meanwhile, the steps for preparation of polyaluminum chloride are reduced, and the production efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of aluminum chloride flocculant production, in particular to a preparation process of polyaluminum chloride. Background technique [0002] Polyaluminum chloride is a water purification material, inorganic polymer coagulant, also referred to as polyaluminum, English abbreviation is PAC, the molecular weight produced due to the bridging effect of hydroxide ions and the polymerization of polyvalent anions Larger, higher charge inorganic polymer water treatment agent. It can be divided into solid and liquid in form. The solid can be divided into brown, beige, golden yellow and white according to different colors, and the liquid can be colorless and transparent, slightly yellow, light yellow to yellowish brown. Polyaluminum chloride of different colors is also quite different in application and production technology. [0003] The raw materials used to prepare liquid polyaluminum chloride in the prior art mainl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01F7/56
CPCC01F7/56
Inventor 吴洪兴翟金希孙凤祥徐兴度徐勇匡新杰谭政汤晓华
Owner 吉林紫瑞新材料有限公司
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