CAS No.: | 75-20--7 |
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Formula: | C2ca |
EINECS: | 200-848-3 |
Constituent: | Industrial Pure Air |
Grade Standard: | Industrial Grade |
Chemical Property: | Combustion-Supporting Gas |
Samples: |
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Calcium -carbide is an inorganic compound, white crystal, industrial product is gray black block, the cross section is purple or gray. In contact with water, a fierce reaction occurs immediately, forming acetylene and releasing heat. Calcium -carbide is an important basic chemical raw material, mainly used to produce acetylene gas. Also used in organic synthesis, oxylene welding and so on.
ITEM | INDEX | |||||
Gas Yield 20°C 101.3 Kpa L/kg ≥ |
Size | Gas Yield | Size percentage | Ash,% | ||
Top | A Grade | Accept Grade | ||||
2-4mm | 260 | 240 | 220 | ≥90 | ≤1 | |
4-7mm | 280 | 260 | 240 | ≥90 | ≤1 | |
7-15mm | 290 | 270 | 250 | ≥90 | ≤1 | |
15-25mm | 300 | 285 | 260 | ≥90 | ≤1 | |
25-50mm | 300 | 295 | 280 | ≥90 | ≤1 | |
50-80mm | 300 | 295 | 280 | ≥90 | ≤1 | |
80-200mm | 300 | 295 | 280 | ≥90 | ≤1 | |
PH3 %(V/V) ≤ | 0.08 | |||||
H2S %(V/V) ≤ | 0.10 | |||||
Quality Standard | GB10665-2004 |
Application
1) Acetylene generated by the reaction of calcium -carbide with water can synthesize many organic compounds such as: synthetic rubber, artificial resin, aceton e, keone, carbon black, etc.; At the same time acetylene oxide flame is widely used in metal welding and cutting.
(2) When powdered calcium -carbide is heated with nitrogen, calcium -cyanamide is generated, namely lime nitrogen:
CaC2 + N2 → CaCN2 + C, ΔH = -296kJ/mol
Lime nitrogen is an important raw material for preparation of cyanamide. The melt produced by the reaction of heated lime nitrogen with salt is used in gold mining and nonferrous metal industry.
(3) calcium -carbide itself can be used in iron and steel industry desulfurization agent.
(4) The production of polyvinrbyl chloride (PVC), calcium -carbide production of PVC using calcium -caide CaC2, in the water to produce acetylene (C2H2), acetylene and hydrogen chloride (HCl) synthesis of vinyl -chloride monomer (CH2=CHCl), and then through the polymerization reaction of vinyl -chloride to produce polyvinyl chloride - [CH -- CHCI]n -- chemical reaction method.
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