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Hydrated calcium chloroaluminate preparation method

A technology for hydrating calcium chloroaluminate and calcium oxide, which can be used in chemical instruments and methods, other chemical processes, water/sewage treatment, etc. Reaction progresses and the effect of increasing the specific surface area

Active Publication Date: 2018-07-03
CHANGZHOU QINGLIU WATER TREATMENT AGENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the defect of poor reuse times of calcium chloroaluminate in the prior art, the present invention provides a preparation method of calcium chloroaluminate hydrate

Method used

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  • Hydrated calcium chloroaluminate preparation method
  • Hydrated calcium chloroaluminate preparation method
  • Hydrated calcium chloroaluminate preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Add 1 ton of water to the reaction kettle, and then add 2 tons of polyaluminum chloride press filter residue, wherein the main component and weight percentage in the residue are TiO 2 =17.2%, (Fe 2 o 3 +Al 2 o 3 )=47.2%, SiO 2 =8.31%, CaCl 2 =6.54%, start stirring, add 545kg of calcium oxide, and carry out copolymerization reaction at 80°C. After 5 hours of copolymerization reaction, add 30kg of sodium fluorosilicate, and continue stirring for 3 hours. Release the material to get the finished product. The SEM image and XRD image of the finished product are detailed in figure 1 and figure 2 .

Embodiment 2

[0020] Add 1 ton of water to the reactor, and then add 1.5 tons of polyaluminum chloride press filter residue, wherein the main component and weight percentage in the residue are TiO 2 =15.8%, (Fe 2 o 3 +Al 2 o 3 )=45.2%, SiO 2 =7.62%, CaCl 2 =5.25%, start stirring, add 450kg of calcium oxide, and carry out copolymerization at 75°C. After 4 hours of copolymerization, add 10kg of sodium fluorosilicate, and continue stirring for 2 hours. Release the material to get the finished product.

Embodiment 3

[0022] Add 1 ton of water to the reactor, and then add 2.5 tons of polyaluminum chloride press filter residue, wherein the main component and weight percentage in the residue are TiO 2 =18.5%, (Fe 2 o 3 +Al 2 o 3 )=48.6%, SiO 2 =9.42%, CaCl 2 =6.86%, start stirring, add 600kg of calcium oxide, and carry out copolymerization reaction at 85°C. After 6 hours of copolymerization reaction, add 25kg of sodium fluorosilicate, and continue stirring for 2 hours. Release the material to get the finished product.

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Abstract

The invention belongs to the technical field of adsorbents, and relates to a hydrated calcium chloroaluminate preparation method, which comprises: adding water and polyaluminum chloride pressure filtration residue in a reaction kettle, adding calcium oxide under a stirring condition, carrying out a copolymerization reaction, adding sodium fluorosilicate during the reaction, and continuously carrying out the stirring reaction until the reaction is completed so as to prepare the hydrated calcium chloroaluminate, wherein the main components of the polyaluminum chloride pressure filtration residuecomprise, by mass (calculated as the dry base), more than or equal to 15% of TiO2, more than or equal to 45% of (Fe2O3+Al2O3), less than or equal to 10% of SiO2, and less than or equal to 10% of CaCl2. According to the present invention, the polyaluminum chloride pressure filtration residue is used as the raw material, and the fluorosilicate is added during the reaction, such that the waste is reutilized, the prepared hydrated calcium chloroaluminate is stable and has the good performance, the specific surface area of calcium chloroaluminate is increased, and the prepared hydrated calcium chloroaluminate can be reused at least more than 6 times, and has stable performance.

Description

technical field [0001] The invention belongs to the technical field of adsorbents, in particular to a preparation method of calcium chloroaluminate hydrate. Background technique [0002] my country's water treatment agent - polyaluminum chloride, has achieved rapid development since the 1970s, especially in the past two decades. New coagulants represented by inorganic polymer coagulants have emerged in an endless stream, and the production and sales volume has increased significantly. rise. my country's polyaluminum chloride (PAC) and aluminum sulfate (AS) production capacity (in solid terms) has reached more than 1 million tons per year, and it has entered the ranks of the world's largest production and sales countries, and its technology research and development is also at the forefront of the world. [0003] At present, as the voice of environmental protection is getting higher and higher, higher requirements are put forward for the raw materials for the production of wat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/30B01J20/04C02F1/28
CPCB01J20/046B01J2220/4875C02F1/281
Inventor 韩晓刚李雪峰顾玲玲蒋晓春
Owner CHANGZHOU QINGLIU WATER TREATMENT AGENT