Iranian Scientists Make Acetylene Gas Purification Device
“The acetylene gas purification device is one of the products of our company. This device has no domestic or foreign analogues and is patented,” said Ali Kashmiri, the managing director of the knowledge-based company.
He explained that pure acetylene gas has always been and is an important need of chemical analysis laboratories, adding that lack of purity of gases available in the market and unprofessional filling of capsules, including not changing the acetone inside the capsule after each charge, not checking the standard level of acetone inside the capsule, etc., are always considered as the main reasons for device failures, which has always put laboratories under pressure due to the high costs of repairs.
Noting that acetylene is produced by mixing water with calcium carbide, Kashmiri said, “The resulting reaction is very exothermic and should be accompanied by the addition of more cold water. Acetylene effervesces and calcium hydroxide (hydrated lime) are by-products of this process.” “After this stage, drying and purification are carried out and the porous material is filled in a solution of acetone in steel cylinders under pressure. This process causes the introduction of many impurities into the gas, which causes corrosion and clogging of parts and adds to the problems of analysis. Impure gas is also one of the main reasons for problems in analysis. For example, in the analysis of arsenic by the hydride generator method, even without pure gas, there is a serious problem in accuracy, which is solved with an acetylene gas purifier,” he added.
Acetylene is the chemical compound with the formula C2H2 and structure H−C≡C−H. It is a hydrocarbon and the simplest alkyne. This colorless gas is widely used as a fuel and a chemical building block. It is unstable in its pure form and thus is usually handled as a solution. Pure acetylene is odorless, but commercial grades usually have a marked odor due to impurities such as divinyl sulfide and phosphine.
As an alkyne, acetylene is unsaturated because its two carbon atoms are bonded together in a triple bond. The carbon–carbon triple bond places all four atoms in the same straight line, with CCH bond angles of 180°.
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