High-Al13 aluminium trichloride polymer crystal and its prepn

A technology of polyaluminum chloride and aluminum chloride, which is applied in the fields of aluminum chloride, aluminum halide, flocculation/sedimentation water/sewage treatment, etc. It can solve problems such as poor water solubility, uneven product quality formula and production process , to achieve excellent flocculation effect, wide application area, and reduce water treatment cost

Inactive Publication Date: 2005-09-28
INNER MONGOLIA UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Solid PAC is made by directly spray-drying or drum-drying liquid PAC. As the temperature increases and the concentration increases until it is evaporated to dryness, it will inevitably deviate from the original optimal shape distribution, and the products are still produced by hydrolysis-polymerization with d

Method used

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  • High-Al13 aluminium trichloride polymer crystal and its prepn

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Al 13 The starting solution concentration required for crystallization (AlCl 3 The concentration is 0.1mol / kg) and the degree of hydrolysis-polymerization reached (the ratio of aluminum hydroxy to 2.8) determines the proportioning of aluminum foil, crystalline aluminum chloride and water, and the production scale is based on the total weight of reactants of 500kg, and 11.63kg of crystalline chlorine is weighed Aluminum chloride (converted according to the actual purity when the crystalline aluminum chloride is impure), 18.13kg aluminum foil (converted according to the actual purity when the aluminum foil is impure), inject 470.3kg of water into the reaction kettle. Start stirring, add crystalline aluminum chloride into the reaction kettle to dissolve, start the interlayer heating of the reaction kettle, control the reaction temperature to 100°C, add aluminum foil in batches, keep stirring and react for 1 hour, send it to the filter device for heat preservation and filtr...

Embodiment 2

[0043] Al 13 The starting solution concentration required for crystallization (AlCl 3 The concentration is 2.3mol / kg) and the degree of hydrolysis-polymerization reached (ratio of hydroxyaluminum is 0.1) to determine the proportioning of aluminum chips, crystalline aluminum chloride and water, and the production scale is based on the total weight of reactants of 500kg, and 277.1kg of crystals are weighed Aluminum chloride, 1.06kg of aluminum chips (converted according to the actual purity when the aluminum chips are impure), inject 221.9 kg of water into the reactor. Start stirring, add crystalline aluminum chloride into the reaction kettle to dissolve it, start the interlayer heating of the reaction kettle, control the reaction temperature at 40°C, add aluminum scraps in batches, keep stirring and react for 72 hours, send it to the filter device for heat preservation and filtration, and the filtrate Send to the crystallization equipment and freeze and crystallize at 0°C, whe...

Embodiment 3

[0045] Al 13 The initial solution concentration required for crystallization (HCl concentration is 0.1mol / kg) and the degree of hydrolysis-polymerization achieved (ratio of hydroxyaluminum is 2.8) determine the proportioning of aluminum flakes, concentrated hydrochloric acid and water, and the production scale is based on the total weight of reactants 500kg Calculate, weigh 4.89kg concentrated hydrochloric acid (concentration is calculated by 12mol / L, density is calculated by 1.19g / cm 3 Calculate according to the actual concentration when the concentration changes), 6.63kg aluminum flakes (convert according to the actual purity when the aluminum flakes are impure), and inject 488.5kg of water into the reaction kettle. Start stirring, turn on reflux condensed water, add concentrated hydrochloric acid into the reaction kettle, start the interlayer heating of the reaction kettle, control the reaction temperature at 100°C, add aluminum flakes in batches, keep stirring for 1 hour, ...

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Abstract

The present invention relates to high-Al13 aluminum chloride polymer crystal and its preparation process. The preparation process includes the reaction of metal with hydrochloric acid or aluminum chloride solution, or the reaction of aluminum hydroxide or aluminum oxide with aluminum chloride solution, or electrolysis, electrodialysis, anionic resin exchange or distillation of aluminum chloride solution; filtering at 20-100 deg.c to eliminate residue, freeze or evaporating crystallization, solid-liquid separation, and stoving at 40-90 deg.c to obtain the high-Al13 aluminum chloride polymer crystal. The produced high-Al13 aluminum chloride polymer crystal has basicity higher than 61 %, alumina content higher than 33 %, water insolubles less than 0.3 %, key flocculating component Al13 over 90 % and thus excellent flocculating effect.

Description

technical field [0001] The present invention relates to high Al 13 Polyaluminum chloride (PAC) crystallization and preparation method thereof, specifically, the present invention relates to high Al 13 Three types of preparation methods of PAC crystals and high Al prepared by these three types of methods 13 PAC crystallization. Background technique [0002] Flocculant is the most used product in the water treatment process, which largely determines the innovative development of water treatment technology and equipment, the simplification of facilities and industrial processes, operating costs and the quality of water purification. Therefore, high-efficiency flocculants have always been a pillar industry in the field of water treatment. The emergence of inorganic polymer flocculant PAC is due to its good flocculation effect, large floc formation, fast settling speed, easy sludge dehydration, less effluent pH drop, wide dosage range, strong adaptability to raw water, and les...

Claims

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Application Information

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IPC IPC(8): C01F7/56C02F1/52
Inventor 孙忠
Owner INNER MONGOLIA UNIVERSITY
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