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  2. Prices of chemical elements - Wikipedia

    en.wikipedia.org/wiki/Prices_of_chemical_elements

    This is a list of prices of chemical elements.Listed here are mainly average market prices for bulk trade of commodities. Data on elements' abundance in Earth's crust is added for comparison.

  3. Acetylene - Wikipedia

    en.wikipedia.org/wiki/Acetylene

    Since the 1950s, acetylene has mainly been manufactured by the partial combustion of methane in the US, much of the EU, and many other countries: [9] [18] [19] 3 CH 4 + 3 O 2 → C 2 H 2 + CO + 5 H 2 O. It is a recovered side product in production of ethylene by cracking of hydrocarbons. Approximately 400,000 tonnes were produced by this method ...

  4. Oxy-fuel welding and cutting - Wikipedia

    en.wikipedia.org/wiki/Oxy-fuel_welding_and_cutting

    Operating cost for a gasoline torch is typically 75-90% less than using propane or Acetylene. The gasoline can be fed either from a pressurized tank (whose pressure can be hand-pumped or fed from a gas cylinder) or a non-pressurized tank, with the fuel being drawn into the torch by a venturi action created by the pressurized oxygen flow. [ 10 ]

  5. Carbide lamp - Wikipedia

    en.wikipedia.org/wiki/Carbide_lamp

    An acetylene gas miner's lamp. A carbide lamp or acetylene gas lamp is a simple lamp that produces and burns acetylene (C 2 H 2), which is created by the reaction of calcium carbide (CaC 2) with water (H 2 O). [1] Acetylene gas lamps were used to illuminate buildings, as lighthouse beacons, and as headlights on motor-cars and bicycles. Portable ...

  6. MAPP gas - Wikipedia

    en.wikipedia.org/wiki/MAPP_gas

    The biggest disadvantage of MAPP gas is cost; it is typically one-and-a-half times as expensive as propane at the refinery, and up to four times as expensive to the consumer. It is no longer used much in any large-scale industry – for larger scale users acetylene/oxygen is more economic than MAPP/oxygen when high flame temperatures are needed ...

  7. Lifting gas - Wikipedia

    en.wikipedia.org/wiki/Lifting_gas

    2.3 Acetylene. 2.4 Hydrogen cyanide. 2.5 Neon. 2.6 ... The extremely high cost of helium (compared to hydrogen) has led researchers to re-investigate the safety ...

  8. How much does a private jet cost? Prices by type ... - AOL

    www.aol.com/finance/much-does-private-jet-cost...

    The typical cost is between $2,000 and $14,000 per billable hour to charter a private jet. However, those prices aren’t the whole story. However, those prices aren’t the whole story.

  9. Steam cracking - Wikipedia

    en.wikipedia.org/wiki/Steam_cracking

    An ethylene plant, once running, does not need to import steam to drive its steam turbines. A typical world scale ethylene plant (about 1.5 billion pounds (680 KTA) of ethylene per year) uses a 45,000 horsepower (34,000 kW) cracked gas compressor, a 30,000 hp (22,000 kW) propylene compressor, and a 15,000 hp (11,000 kW) ethylene compressor.