This paper investigates a coupled technology to produce the high-purity normal and isomeric pentane from reforming topped oil. The coupled technology is adsorption after rectification technology, which is better than the traditional one in product purity and energy consumption. The purity of the n-pentane and the iso-pentane obtained from the coupled technology are both higher than 99%, and the quality of pentane foamer obtained from blending the n-pentane with the pentane oil meets the Q/SHZL 0005-1999 standard. (C) 2010 Elsevier Ltd. All rights reserved.