How CaC2 is made, and the equation for CaCl2 is made

The production methods are aerobic heat and electrothermal. Generally, the electrothermal method is used to produce calcium carbide, that is, quicklime and carbon-containing raw materials (coke, anthracite or petroleum coke) are produced in the calcium carbide furnace, relying on the high temperature melting reaction of the arc to generate calcium carbide. The production process is shown in the figure.

The main production processes are: raw material processing; Ingredient; The mixture is added to the electric furnace through the inlet or pipeline at the upper end of the electric furnace, heated to about 2000 in an open or closed electric furnace, and the calcium carbide is generated according to the following reaction: CaO+3CCaC2+CO.

The molten calcium carbide is taken out of the furnace bottom, cooled, crushed and packaged as a finished product. The carbon monoxide generated in the reaction is discharged in different ways depending on the type of calcium carbide furnace: in the open furnace, the carbon monoxide is burned on the material surface, and the flames produced are scattered outward with the dust; In a semi-closed furnace, part of the carbon monoxide is extracted by the suction hood placed on the furnace, and the remaining part is still burning on the material surface; In a closed furnace, the entire carbon monoxide is extracted.

The chemical name of calcium carbide is calcium carbide, also known as calcium acetylene, the molecular formula is CAC2, the appearance is gray, brownish-yellow, black or brown lumpy solid, with garlic flavor, is the basic raw material of organic synthetic chemical industry, the use of calcium carbide as raw material can synthesize a series of organic compounds, for industry, agriculture, medicine to provide raw materials. The main component of industrial calcium carbide is calcium carbide, the rest is free calcium oxide, carbon and silicon, magnesium, iron, aluminum compounds and a small amount of phosphide and sulfide. The purity of industrial calcium carbide is about 70%-80%, and the impurities cao accounts for about 24, carbon, silicon, etc

Iron, calcium phosphide and calcium sulfide account for about 6. The appearance varies depending on the amount of calcium carbide in a solid substance that is gray, brown, purple, or black. The higher calcium carbide content is purple. The density of industrial products, melting point 2300, can conduct electricity, the higher the purity, the easier it is to conduct electricity.

The chemical properties of calcium carbide are very reactive. Acetylene gas and calcium hydroxide are produced by intense decomposition in water, and a large amount of heat is released.

Main uses: 1) The acetylene formed by the reaction of calcium carbide and water can synthesize many organic compounds, such as: synthetic rubber, artificial resin, acetone, enkenone, carbon black, etc.; At the same time, acetylene oxyoxide flame is widely used in metal welding and cutting.

2) When heating powdered calcium carbide and nitrogen, the reaction generates calcium cyanamide, that is, lime nitrogen, and the cyanide melt generated by the reaction of heating lime nitrogen and salt is used in gold mining and non-ferrous metal industries.

3) Calcium carbide itself can be used as a desulfurizer in the steel industry.

Calcium carbide is one of the basic raw materials for the organic synthetic chemical industry. It is an important raw material for acetylene chemical industry. Acetylene made from calcium carbide is widely used in metal welding and cutting.

Elemental compounds: Ca+Cl2 == == CaCl2

Basic oxide salt: Cao + 2 HCl = CaCl2 + H2O

Salt Salt: CuCl2 + Ca(OH)2 = Cu(Oh)2 + CaCl2

The format requirement to represent the formation process is to write the electronic formula of "atom" on the left and the electronic formula of the corresponding substance on the right.

Calcium hydroxide and hydrochloric acid are used to generate calcium chloride and water, Ca(OH)2+2HCl=CaCl2+2H2O

Calcium hydroxide reacts with CO2 to produce calcium carbonate and water.

Ca(OH)2 + CO2 = CaCO3 precipitation + H2O, if CO2 is excessive, CaCO3 precipitates and dissolves to form calcium bicarbonate.

ca(oh)2+2co2=ca(hco3)2

Hydrolysis to produce ethylene is the right thing to say. But the interpretation is different.

This looks at the apparent valence.

In CAC2, Ca is the sock touching +2 valence, so C is -1 valence, and C in the resulting acetylene is -1 valence.

So: Li2C2 hydrolysis to acetylene.

ZNC2 hydrolysis to form ethylene.

Mg2C3 is hydrolyzed to form C3H4