| 摘要 |
An improved safe method for the handling, concentration, purification, storage, and transportation of C3 and C4 acetylenic hydrocarbons involves contacting a gas stream that contains 10 mole percent or less of these compounds with activated carbon to form compositions that comprise activated carbon on whose surface about 2 percent to 10 percent, based on the weight of the carbon, of C3 and/or C4 acetylenic compounds have been adsorbed. These activated carbon compositions, which are air stable and which cannot be detonated, can be handled, stored and transported without appreciable danger of explosion. Concentrated and purified acetylenic compounds can be recovered by stripping the carbon with, for example, a nitrogen-methylene chloride mixture. Further improvement in the safety of the method results when the pyrolysis gas is diluted with an inert, non-explosive gas that has carbon adsorption characteristics similar to those of the C4 acetylenic compounds prior to the treatment of the activated carbon with the pyrolysis gas stream.
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