25-50mm Calcium Carbide

25-50mm Calcium Carbide:

Reaction principle: CaC2 + 2H2O == Ca (OH) 2 + C2H2 ↑

This is an exothermic reaction, ΔH = -120 kJ / mol, so the reaction with saturated brine needs to be controlled to control the reaction rate. [2]

CaC2 conductive, the higher the purity, the easier the conductive.

(1) acetylene generated by the reaction of Calcium Carbide and water can synthesize many organic compounds

Calcium carbide - Lime balance diagram

Calcium carbide - lime balance diagram

For example: synthetic rubber, synthetic resin, acetone, ketene, carbon black, etc .; while acetylene-oxygen flame is widely used in metal welding and cutting.

(2) heated powdered calcium carbide and nitrogen, the reaction generates calcium cyanamide, lime nitrogen:

CaC2 + N2 → CaCN2 + C, ΔH = -296 kJ / mol

Lime nitrogen is an important raw material for preparing cyanamide. Lime nitrogen and salt heating reaction melt used for gold mining and non-ferrous metals industry.

(3) Calcium carbide itself can be used in the steel industry desulfurization agent.

(4) Production of polyvinyl chloride (PVC) and calcium carbide production of polyvinyl chloride Using calcium carbide (CaC2) and acetylene (C2H2) in water to produce vinyl chloride monomer (CH2 = CHCl), and then through the polymerization of vinyl chloride to generate polyvinyl chloride - [CH2-CHCI] n- chemical reaction method.

(5) old miners under the mine, the calcium carbide into the iron cans generated by the use of acetylene (C2H2) made of calcium carbide lamps.