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Hexafluoroaluminate of organic onium, and preparation method and application thereof

A technology of hexafluoroaluminate and organic onium, which is applied in the fields of organic chemistry, chemical instruments and methods, and compounds of Group 5/15 elements of the periodic table, etc., which can solve the problems of demanding equipment and materials, high equipment requirements, and operating procedures. Complicated issues

Inactive Publication Date: 2013-11-06
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are many problems in the cryolite-alumina electrolysis method: 1. After the bauxite is processed, it will generate oxide or hydroxide solid waste containing iron and silicon. At the same time, during the electrolysis process, fluoride and polycyclic aromatic hydrocarbons will be released. , carbon dioxide, sulfur dioxide, perfluorocarbon and other toxic gases, which seriously pollute the environment; 2. The consumption of the lining of the electrolytic cell during the electrolytic aluminum process, that is, the treatment of cathode waste and its difficulties; 3. The high electrolysis temperature requires equipment and materials Harsh and high energy consumption, using this method to produce 1 ton of aluminum requires about 13000-15000KWh of energy consumption
In addition, most of the methods for preparing organo-onium tetrafluoroaluminate mentioned in the above-mentioned patents use highly toxic hydrofluoric acid or fluorosilicic acid as raw materials, which require high equipment and complicated operation processes

Method used

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  • Hexafluoroaluminate of organic onium, and preparation method and application thereof
  • Hexafluoroaluminate of organic onium, and preparation method and application thereof
  • Hexafluoroaluminate of organic onium, and preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1 4

[0063] Synthesis of the hexafluoroaluminate of embodiment 1 tetramethylammonium

[0064] Weigh 17.30g ammonium fluoroaluminate (purchased from Guangzhou Weber Chemical Company, chemically pure) in a three-necked polytetrafluoroethylene flask, feed nitrogen from the mouth of the flask while adding 240.12g of 10% analytically pure tetramethyl hydroxide Ammonium (purchased from Sinopharm Group Beijing Skiing Reagent Co., Ltd.), condensed and refluxed at 90°C, and mechanically stirred for 48 hours. After the reacted solid component was filtered off, the solvent was removed by vacuum rotary evaporation, and vacuum-dried at 80° C. for 24 hours to obtain the product tetramethylammonium hexafluoroaluminate. First, carry out Raman spectrum analysis on the obtained product, the instrument used is laser Raman spectrometer (produced in France HORIBAJOBIN YNON), Raman laser wavelength: 514nm, 785nm, Raman shift range 100-4000cm -1 , microscopic size range ≤ 1μm, spectral range: 200-1050...

Embodiment 2

[0067] Example 2 Synthesis of hexafluoroaluminate of 1,3 dimethylimidazole

[0068] Weigh 15.62g of ammonium fluoroaluminate (purchased from Guangzhou Weber Chemical Company, chemically pure) in a polytetrafluoroethylene three-necked flask, feed nitrogen from the mouth of the flask while adding 271.23g of 10% analytically pure 1,3 dimethyl The hydroxide salt of imidazole was refluxed at 90°C and mechanically stirred for 48 hours. After the reacted solid component was filtered off, the solvent was removed by rotary evaporation in vacuo, and vacuum-dried at 80° C. for 24 hours to obtain the title product.

Embodiment 3 6

[0069] Synthesis of the hexafluoroaluminate of embodiment 3 hexamethylguanidine

[0070] Weigh 11.14g ammonium fluoroaluminate (purchased from Guangzhou Weber Chemical Company, chemically pure) in a polytetrafluoroethylene three-necked flask, feed nitrogen from the flask mouth while adding 273.02g of 10% analytically pure hexamethylguanidine The hydroxide salt was refluxed at 90°C and mechanically stirred for 48 hours. After the reacted solid component was filtered off, the solvent was removed by rotary evaporation in vacuo, and vacuum-dried at 80° C. for 24 hours to obtain the title product.

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Abstract

The invention provides hexafluoroaluminate of organic onium. The hexafluoroaluminate of the organic onium is prepared by mixing and reacting saline solution of hydroxide of the organic onium with M+OH- structure and ammonium hexafluoroaluminate under the protection of an inert gas and evaporating and eliminating solvent. The hexafluoroaluminate of the organic onium of the invention can be mixed with one or more polybasic alcohols with carbon atom number of less than or equal to 5, such as glycol and the like, to prepare electrolyte for electrolyzing aluminum oxide. The electrolyte has the advantages of greatly reducing electrolysis temperature for producing aluminum by electrolyzing aluminum oxide, along with high conductivity, high thermal stability, high energy utilization, low equipment corrosion and environmental friendliness.

Description

technical field [0001] The invention belongs to the field of industrial aluminum production. Specifically, the present invention relates to a compound as an electrolyte and its preparation method and use. More specifically, the present invention relates to an organic onium hexafluoroaluminate as an electrolyte, its preparation method and the electrolysis method for preparing electrolytic alumina with it. liquid use. Background technique [0002] Aluminum is the most useful metal in the world besides steel, it is widely used in construction industry, Transportation, packaging and electronics industries. [0003] At present, the main method of industrial production of aluminum is the Hall-Héroult method, that is, cryolite-alumina molten salt electrolysis. Under the conditions of electrolysis temperature of 950-980°C and current of 150,000A, alumina is reduced to aluminum liquid in an aluminum electrolytic cell containing fluoride. This method has been quite mature after mo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C211/63C07D233/58C07C279/04C07D213/20C07D207/323C07F9/54C25C3/18
Inventor 李会泉周君曹妍
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI