What is the industrial manufacturing method of aluminum? What is the equation of the industrial manu

A mixture of electrolytically molten alumina and cryolite Cryolite is a mixture of cryolite that lowers the melting point.

Industrial method: electrolytic mixture of molten alumina and cryolite.

Laboratory method: electrolytic molten aluminum chloride.

Other compounds: AlCl3-aluminium chloride, sodium Naalo2-metaaluminate, Al(OH)3-aluminium hydroxide.

Extended Description: A silvery-white trivalent metal element with a bluish tinge, with good ductility, toughness and the ability to emit [loud] sounds, it is known for its lightness, good electrical and thermal conductivity, high reflectivity and resistance to oxidation.

Extraction of aluminum from bauxite reaction process:

1. Dissolution: dissolve bauxite in NaOH (AQ).

Alo + 2NaOH ==2Naalo (sodium metaaluminate) + HO.

2. Filtration: remove residues of ferrous oxide (FeO), sodium aluminosilicate, etc.

3. Acidification: Excessive CO is introduced into the filtrate

naalo₂+ co₂+ 2h₂o ==al(oh)₃↓nahco₃。

4. Filtration, burning Al(OH) 2AL(OH) = high temperature == AL O + 3H O.

Note: In order to reduce the melting temperature of alumina during electrolysis, ice annihilation spar (3naf·alf) was added to the ALO dispersion.

5. Electrolysis: 2ALO (L) == Energized == 4AL + 3O.

Categories: Education, Science, >> Science & Technology.

Problem description: Recently, it was found that there is a sentence in the textbook "In 1886, American chemists added cryolite to alumina, which lowered the melting point temperature of alumina, reduced energy consumption, and made the ** of aluminum drop sharply".

However, the textbook says that "the method of electrolytic aluminum was only invented in 1886". Is it such a coincidence? Electrolysis had just been invented, and in the same year it was improved (cryolite was added).

Looking at the meaning of books, I personally think that electrolysis should have been available before 1886, but the energy consumption is relatively large, so the price is expensive. But this contradicts the second point of view of the book.

I don't know if that's the case, please answer the experts! Stop!

After the Italian physicist Volt created the battery in 1800, the British chemist David and the Swedish chemist Betsilius both tried to use electric current to separate aluminum from baux-vanadium earth in 1808 and 1810, but they were unsuccessful. Bezirius, however, gave the unattained metal a name: Alumien. This is from the Latin word alumen.

In medieval Europe, the term was a general term for astringent alum, which referred to the mordant used to dye cotton fabrics. It was from this that the later Latin name for aluminium and the element symbol AL were derived.

In 1825, the Danish chemist Osder published an experiment to produce aluminum. In 1827, the German chemist Wooler repeated Osder's experiment and continued to improve the method of producing aluminum. In 1854, the German chemist Dver used sodium instead of potassium to reduce aluminum chloride to make ingots of metal slag Li aluminum.

Industrial method: Electrolytic melting and melting of a mixture of alumina and cryolite.

Laboratory method: electrolytic molten aluminum chloride.

Other compounds: Alcl3-aluminum chloride.

Naalo2-sodium metaaluminate.

Al(OH)3-aluminum hydroxide.

Extended Description: Silvery-white trivalent gold dust with a blue color, good ductility, toughness and can emit [loud] sound, known for its lightness, good electrical and thermal conductivity, high reflectivity and oxidation resistance. Branch.

The industrial method of aluminium is to obtain aluminium oxide from bauxite, and then electrolyze aluminium oxide to obtain aluminum.

Aluminium is present in various rocks or ores in the form of chemical forms, such as feldspar, mica, kaolinite, bauxite, alum, etc. Aluminum can be prepared by eutectic electrolysis of aluminum oxide and cryolite. The steps are as follows:

Dissolution: bauxite is dissolved in hydrogen sodium oxide solution; Narptotrace filtration: remove ferrous oxide, sodium aluminosilicate, etc., from the residual cavity; Acidification:

Excess carbon dioxide is introduced into the filtrate to form aluminum hydroxide; filtration and burning to produce aluminum oxide; Electrolysis: Liquid aluminium trioxide is energized to produce aluminum.