2520 Ind. Eng. Chem. Res., Vol. 36, No. 6, 1997 reactions using sulfuric acid catalyst. Ind. Eng. Chem. Res. 1988b, 27, 381. Chu, Y. F.; Chester, A. W. Reactions of isobutane with butene over zeolite catalysts. Zeolites 1986, 6, 195. Corma, A.; Martinez, A. Chemistry, catalysts, and processes for isobutane-olefin alkylation: Actual situation and future trends. Catal. Rev., Sci. Eng. 1993, 35, 483. Hofmann, J. E.; Schriesheim, A. Ionic reactions occurring during sulfuric acid catalyzed alkylation. J. Am. Chem. Soc. 1962, 84, 953. Kirsch, F. W.; Potts, J. D.; Barmby, D. S. Isoparaffin-olefin alkylation with crystalline aluminosilicates. I. Early studiessC4olefins. J. Catal. 1972, 27, 142.
Nakamura, I.; Ishida, S.; Fujimoto, K. Supercritical phase isobutane/olefin alkylation on solid acids. Paper presented at the 210th National Meeting of the American Chemical Society, Chicago, Aug 20-25, 1995. Simpson, M. F.; Wei, J.; Sundaresan, S. Kinetic analysis of isobutane/butene alkylation over ultrastable H-Y zeolite. Ind. Eng. Chem. Res. 1996, 35, 3861. Weitkamp, J. Isobutane-butene alkylation on cerium exchanged X and Y zeolites. In Catalysis by Zeolites; Imelik, B., et al., Eds.; Elsevier: Amsterdam, The Netherlands, 1980; pp 65-75.
IE970837B
ADDITIONS AND CORRECTIONS Volume 35, Number 12 Some Design Aspects of Reactive Distillation Columns (RDC). Sanjay M. Mahajani* and Aspi K. Kolah Page 4589. There is a tyopgraphical error in eqs 13 and 15. The correct equations are as follows:
Liquid side mass balance in the rectifying section
(
)
ψi RF + 1 dxi )dξ HTUV RF
(
)(
)
x1x3 F RF + 1 Da x22 V RF K
i ) 1, 3 (13)
Liquid side mass balance in the stripping section ψi dxi SF )V SF + 1 dξ HTU
(
Da
)
)(
)
x1x3 F SF x22 L + F SF + 1 K
(
i ) 1, 3 (15)
IE970842F
