Acetylene
The company has fully passed IS09001:2000 quality system certification. With a number of technical talents with professional background in the gas industry, it has established business lines at home and abroad, with an annual turnover of about 50 million yuan.
Category:
Keywords: Oxygen 丨 Nitrogen 丨 Argon 丨 Hydrogen
Consultation:
Product Description
| alias | calcium carbide gas, wind coal |
| molecular weight | 26.04 |
| CAS registration number | 74-86-2 |
| EINECS login number | 200-816-9 |
| melting point | -88℃ |
| boiling point | -84℃ |
| water solubility | Slightly soluble |
| density | 0.62kg/m3(-82°C) |
| appearance | Colorless gas |
| Security description | S9 S16 S33 |
| Hazard symbols | R5 |
| Hazard description | F+ |
| Un Dangerous goods number | 1001 |
| Key corner | 180° |
| refractive index | 1.316 |
Primary sources
1. It is prepared by the reaction of calcium carbide (calcium carbide) and water
2. Natural gas to acetylene method
Main applications
1. Acetylene can be used for lighting, welding and cutting metal (oxyalkyne flame), and is also the basic raw material for the manufacture of acetaldehyde, acetic acid, benzene, synthetic rubber, synthetic fiber, etc.
2. Acetylene can produce high temperature when burning, and the temperature of oxygen flame can reach about 3200 °C, which is used for cutting and welding metals. Supply an appropriate amount of air, which can be completely burned to emit bright white light, and can be used as a lighting source in places where electric lights are not widespread or there is no electricity. Acetylene is chemically active and can undergo addition reactions with many reagents. Before the 20s of the 60th century, acetylene was the most important raw material for organic synthesis and is still one of the important raw materials. If it is added with hydrogen chloride, hydrocyanic acid and acetic acid, it can generate raw materials for the production of polymers.
3. Acetylene can undergo different polymerization under different conditions, respectively to generate vinyl acetylene or divinyl acetylene, the former and hydrogen chloride addition can obtain the raw material 2-chloro-1,3-butadiene for neoprene rubber. At a high temperature of 400~500 °C, cyclic tripolymerization can occur to generate benzene; Using nickel cyanide Ni(CN)2 as catalyst, cyclooctatetraene can be generated at 50 °C and 1.2~2MPa.
4. Acetylene decomposes into carbon and hydrogen at high temperature, from which acetylene carbon black can be prepared. Under certain conditions, acetylene polymerizes to generate aromatic hydrocarbons such as benzene, toluene, xylene, naphthalene, anthracene, styrene, and indene. Substitution and addition reactions produce a range of extremely valuable products. For example, acetylene dimer produces vinyl acetylene, which is then added with hydrogen chloride to obtain chloroprene; acetylene is directly hydrated to produce acetaldehyde; Acetylene and hydrogen chloride undergo addition reaction to prepare vinyl chloride; Acetylene reacted with acetic acid to obtain vinyl acetate; acetylene reacts with hydrogen cyanide to produce acrylonitrile; Acetylene reacts with ammonia to form methylpyridine and 2-methyl-5-ethylpyridine; Acetylene reacts with toluene to form xylene ethylene, and further catalyst cracking produces three or three isomers of methylbenzene Zene: acetylene condenses with one molecule of formaldehyde to propynyl alcohol, and two molecules of formaldehyde condensation into butynediol; The addition reaction between acetylene and acetone can prepare methylalkynol, and then react to generate isoprene; Acetylene reacts with carbon monoxide and other compounds (such as water, alcohols, mercaptans) to prepare acrylic acid and its derivatives.
Molecular weight: 4.0026 g/mol
Relative vapor density (air = 1): 0.14
Relative density (water = 1): 0.15
CAS number: 7440-59-7
Areas of use: optical fiber, laser, welding and cutting, diving breathing, low-temperature superconductivity, pressurization, cleaning, leak detection, protective gas, balloons, airships, etc.
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Goldory Gas Manufacturing Co., Ltd.
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