Method for electrically converting aluminum chloride into aluminum oxide
What is Al technical title?
Al technical title is built by PatSnap Al team. It summarizes the technical point description of the patent document.
A technology of aluminum chloride and alumina, applied in the field of electrolysis, can solve the problems of high energy consumption, high cost, large pollution, etc., and achieve the effects of high purity, short process and lower production cost
Active Publication Date: 2017-09-19
NORTHEASTERN UNIV
View PDF8 Cites 4 Cited by
Summary
Abstract
Description
Claims
Application Information
AI Technical Summary
This helps you quickly interpret patents by identifying the three key elements:
Problems solved by technology
Method used
Benefits of technology
Problems solved by technology
[0006] The purpose of the method for electroconverting aluminum chloride into alumina in the present invention is to use a wide range of aluminum chloride resources to obtain metallurgical grade alumina or chemical alumina products in a short process and with low energy consumption, so as to avoid or solve the problems of the prior art There are problems such as high energy consumption, high cost and heavy pollution in the
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more
Image
Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
Click on the blue label to locate the original text in one second.
Reading with bidirectional positioning of images and text.
Smart Image
Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1
[0049] In this embodiment, the method for electroconverting aluminum chloride into alumina is carried out in the following steps:
[0050] Step 1: electrolyze the aluminum chloride aqueous solution, the process parameters of the electrolysis are: the temperature is 20°C, and the voltage of the electrolysis is 3V;
[0051] In described step 1, the mass concentration of described aluminum chloride aqueous solution is 50g / L;
[0052] Step 2: Introduce high-purity carbon dioxide gas into the cathode chamber 3 electrolyte in the cationic membrane electrolyzer with a flow rate of 20m 3 / h, make the precipitation of hydrocarbon oxygen compounds that directly generate aluminum in the cathode chamber 3 of the cationic membrane electrolyzer;
[0053] In the step 2, the high-purity carbon dioxide gas is introduced through the vent hole at the bottom of the cathode chamber 3 of the electrolytic cell.
[0054] Step 3: Stir the cathode chamber 3 of the cationic membrane electrolyzer, the ...
Embodiment 2
[0061] In this embodiment, the method for electroconverting aluminum chloride into alumina is carried out in the following steps:
[0062] Step 1: electrolyzing the aluminum chloride aqueous solution, the process parameters of the electrolysis are as follows: the temperature is 90°C, and the voltage of the electrolysis is 20V;
[0063] In described step 1, the mass concentration of described aluminum chloride aqueous solution is 200g / L;
[0064] Step 2: Introduce high-purity carbon dioxide gas into the cathode chamber 3 electrolyte in the cationic membrane electrolyzer with a flow rate of 80m 3 / h, make the precipitation of hydrocarbon oxygen compounds that directly generate aluminum in the cathode chamber 3 of the cationic membrane electrolyzer;
[0065] In the step 2, the high-purity carbon dioxide gas is introduced through the vent hole at the bottom of the cathode chamber 3 of the electrolytic cell.
[0066] Step 3: Stir the cathode chamber 3 of the cationic membrane ele...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more
PUM
Property
Measurement
Unit
melting point
aaaaa
aaaaa
boiling point
aaaaa
aaaaa
Login to view more
Abstract
The invention belongs to the technical field of electrolysis, particularly relates to a method for electrically converting aluminum chloride into aluminum oxide, and aims at obtaining metallurgy-level aluminum oxide or chemical aluminum oxide products in short process at low energy consumption by means of wide aluminum chloride resources so as to avoid or solve the problems that in the prior art, energy consumption is high, the cost is high, and pollution is severe. According to the electrolysis method, aluminum chloride can be directly converted into aluminum compound precipitates, and an electrolysis technology is high in automation degree and short in process. Compared with a traditional aluminum oxide preparation method, the method has the advantages that the evaporation and concentration process and equipment thereof are omitted, therefore, the production cost can be reduced, and the production efficiency can be improved; aluminum oxide is produced through the electrolysis technology, the purity of by-products including chlorine and hydrogen in the production process is high, the by-products can be directly dried and utilized, electrolyte is recycled after being filtered, no pollution product is generated in the process, and environmental friendliness and harmlessness are achieved; metallurgy-level aluminum oxide or chemical aluminum oxide is obtained by roasting the aluminum compounds obtained through electrolysis, and the obtained product is high in purity.
Description
technical field [0001] The invention belongs to the technical field of electrolysis, and in particular relates to a method for electroconverting aluminum chloride into alumina. Background technique [0002] Alumina is a white amorphous powder, insoluble in water, soluble in inorganic acids and alkaline solutions, with a melting point of 2050°C and a boiling point of 2980°C. At present, it is generally believed that alumina mainly has two variants, α-type and γ-type, and γ=Al 2 o 3 It is made by dehydrating aluminum hydroxide at a low temperature of 140-150°C. It is also called activated alumina and aluminum glue in industry. γ-type alumina is insoluble in water, but soluble in strong acid or strong alkali solution, and it will be completely transformed into α-type alumina when heated to 1200°C. [0003] According to different uses, alumina is divided into two categories: one is alumina used as raw material for electrolytic aluminum, called metallurgical grade alumina; the...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more
Application Information
Patent Timeline
Application Date:The date an application was filed.
Publication Date:The date a patent or application was officially published.
First Publication Date:The earliest publication date of a patent with the same application number.
Issue Date:Publication date of the patent grant document.
PCT Entry Date:The Entry date of PCT National Phase.
Estimated Expiry Date:The statutory expiry date of a patent right according to the Patent Law, and it is the longest term of protection that the patent right can achieve without the termination of the patent right due to other reasons(Term extension factor has been taken into account ).
Invalid Date:Actual expiry date is based on effective date or publication date of legal transaction data of invalid patent.
Login to view more