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Acetylene, which is also commonly known as ethene, can be classified in the hydrocarbon family of alkynes. In fact, there is an unstable triple bond in this compound. Because of this triple bond, acetylene gas is classified as an unsaturated gas.
Acetylene has many uses in industry, for example, it can be used as a precursor and raw material in the production and synthesis of chemicals.
Due to the many applications and interest of acetylene, there are many methods to produce this gas. Acetylene can be transported and stored.
As mentioned, acetylene is the simplest alkyne, which has no color and odor, and it ignites strongly, and when it condenses, there is a possibility of explosion. Acetylene or ethene is a volatile gas and catches fire when combined with oxygen.
The structure of acetylene is such that it has the highest ignition point among other hydrocarbons, and for this reason, acetylene gas is used in welding.
Preparation of acetylene gas
The production of acetylene gas is carried out by two industrial and laboratory methods.
The preparation of acetylene in the industry is as follows:
CH2=CH2--> HC≡CH + H2
2CH4 --> C2H2 +3H2
6CH4 + O2 --> 2C2H2 + 2CO + 10 H2
The production of acetylene gas in a laboratory method is carried out in the following way:
Adding water to calcium carbide
CaC2 + 2H2O --> 2C2H2 + Ca(OH)2
After the production of acetylene gas, it is passed through a container that contains copper so that the impurities in it such as phosphine and hydrogen sulfide are absorbed and pure acetylene gas is prepared. Of course, it should be noted that sometimes the amount of acetylene gas produced in the laboratory is so low that passing it through copper sulfate is not a wise thing to do. Another method of acetylene gas production that is done commercially is the use of calcium carbide and water reaction.
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