Petroleum Processing and Petrochemicals ›› 2013, Vol. 44 ›› Issue (5): 57-60.
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Abstract: The industrial cyclopentane satisfied with national standard can be produced by the distillation technique, but it cannot yet meet the European Union standard of the cyclopentane solvent (benzene mass fraction ≤0.00005%, hexane mass fraction ≤0.0008%). In order to remove trace benzene and hexane from cyclopentane, a distillation-adsorption complex technique was exploited. Both active carbon fiber and zeolite molecular sieve purchased from the market are used as composite adsorbents, and both dehydration tower and debenzolization-dehexane tower are set in industrial process. The results of commercial experiments show that cyclopentane solvent met with the European Union standard can be produced by means of both distillation-adsorption complex technique and adsorbents composed of active carbon fiber and zeolite molecular sieve. Both active carbon fiber and zeolite molecular sieve are innocuous and unpoisonous, recyclable, and easy to obtain. The distillation-adsorption complex technique is worthy of being popularized because of its simple, convenient and safty.
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