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Method for preparing polymerized ferric chloride by utilizing mechanochemical method

A technique of polymerizing ferric chloride and mechanochemistry, which is applied in chemical instruments and methods, ferric halides, water/sewage treatment, etc. It can solve the problems of few industrial applications and the failure to realize waste recycling, and achieve simple methods and realize waste recycling. The effect of resource utilization and short production cycle

Active Publication Date: 2018-08-28
ZHEJIANG UNIV OF TECH
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Problems solved by technology

However, for a long time, mechanochemistry has not achieved the purpose of recycling waste, so its industrial application is not much

Method used

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Embodiment Construction

[0023] The present invention is further described below in conjunction with specific embodiment, but protection scope of the present invention is not limited thereto:

[0024] This embodiment includes the following steps:

[0025] 1. Add 30 mL of deionized water, 6.0 g of iron powder, 6.0 g of ferric oxide, 6.3 g of hexachloroethane and 144 g of stainless steel balls into the grinding tank of the grinder, and ball mill for 180 min at a speed of 600 rpm to obtain A mixed slurry containing degradation products amorphous carbon, ferrous chloride and ferric chloride (also containing unreacted iron powder and ferric oxide).

[0026] 2, the degradation product of suction filtration step 1 gained, removes the amorphous carbon solid that generates, unreacted iron powder and ferric oxide, obtains the mixed solution that contains ferrous chloride and ferric chloride; This mixed solution is green, The filtrate volume was 30 mL.

[0027] 3. Add 1mL of hydrogen peroxide with a mass fract...

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Abstract

The invention relates to the fields of waste harmless treatment and resource utilization and aims at providing a method for preparing polymerization ferric chloride by utilizing a mechanochemistry method. The method comprises the following steps: adding deionized water, iron powder, ferroferric oxide, hexachloroethane and stainless steel ball into a grinder, carrying out ball milling to obtain mixed slurry and carrying out suction filtration treatment to obtain a green mixed solution; dropwise adding hydrogen peroxide until the green mixed solution becomes deep brownish red to obtain a ferricchloride solution; adding sodium dihydrogen phosphate while stirring; adding a strong alkaline solution after reacting for 30 minutes and carrying out polymerization reaction to generate black brown polymerized ferric chloride. Compared with a traditional method of treating chlorinated organic compounds, the method disclosed by the invention has the advantages of simplicity, mild reaction conditions, no secondary pollution and the like; meanwhile, the obtained abrasive product can be further treated to obtain the polymerized ferric chloride (flocculant); the problems of more reactants, complexreaction flow and the like in a traditional synthesis method of the polymerized ferric chloride are solved, and further the resource utilization of wastes (hazardous) is realized; fewer chemicals areadded and the production cycle is short.

Description

technical field [0001] The invention belongs to the field of harmless treatment and resource utilization of waste, and relates to a method for using mechanochemical methods to process organic chlorides and produce polyferric chloride, that is, to use mechanical ball milling of iron powder, ferroferric oxide and chlorine-containing organic A method for preparing polyferric chloride from waste liquid or waste mixture. Background technique [0002] Chlorine-containing organic compounds are widely used in chemical industry, medicine, leather, electronics and other industries, but most of these compounds are chemically stable and have greater biological toxicity, carcinogenesis, distortion, and mutagenesis, and some are even persistent. Organic Pollutants (POPs), there are 12 POPs in the first control list of the Stockholm Convention. Take hexachloroethane as an example: Hexachloroethane can be used as a raw material for organic synthesis, as a degasser for aluminum and its allo...

Claims

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Application Information

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IPC IPC(8): C01G49/10C02F1/52
CPCC01G49/10C02F1/5245
Inventor 於建明黄志勇胡俊成卓韦冯卓焕
Owner ZHEJIANG UNIV OF TECH
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