986 Ind. Eng. Chem. Res., Vol. 31, No. 3, 1992 Kunze, G. W. In Methods of Soib Analysis; Black, C. A., Ed.; American Society of Agronomy: Wisconsin, 1965; Part I, pp 574-6. Leiteizen, M. G.; Pashkevich, L. A; Firfarova, I. B.; Teekhovolekaya, D. I. Characteristics of sodium hydroaluminosilicates forming during bauxite digestion. Proceedings of the Second Conference on VAMZ & FKZ Experts, Leningrad 1972; Research Institute of Non-ferrous Metals: Budapest, 1975. Parekh, B. K.; Goldberger, W. M. "An assessment of technology for possible utilization of Bayer process muds"; Industrial Environmental Research Laboratory, Office of Research and Development, U.S.Environmental Protection Agency: Cincinnati, OH, 1976. Roach, G. I. D.; White, A. J. Dissolution kinetics of kaolin in caustic liquors. Light Met. 1988,41-7. Seimiya, S . Some properties of sodalite in red mud. Extr. Metall. Alum. 1963,1,115-32. Wong, J. W. C.; Ho, G . E. Neutralization and cation dissolution characteristics of bauxite refining residue. In Hazardous and Industrial Wastes;Varma, M. M., Johnson Jr., J. H., Eds.; Haz-
ardous Materiale Control Research Institute: Silver Spring, MD,
1988, pp 247-64.
Goen E. Ho,* William A. Robertson Institute for Environmental Science Murdoch University Perth, Western Australia 6150, Australia Gerald I. D. Roach, Ari Antonovsky Research and Development Department Alcoa of Australia Limited Kwinuna, Western Australia 6167, Australia Received for review July 26, 1991 Revised manuscript received October 30, 1991 Accepted November 28, 1991
ADDITIONS AND CORRECTIONS Conversion of Synthesis Gas to Dimethyl Ether over Bifunctional Catalytic Systems [Volume 30, Number 11,Page 23721. Alkeos C. Sofianos* and Mike S. Scumell Page 2374. In Table I, column 8, the results listed for DME are incorrect as published. The correct table is given below. Table I. Results of Oxygenate Synthesis from Syngas over Bifunctional Catalystsa catalyst COconv, % CO: CH4b C,+ CZ=b C3+C3=b DMEb 1 AS1 (commercial) 12.50 6.92 0.57 0.18 0.14 0.18 2 A(own) 12.01 5.80 0.23 0.11 0.05 0.36 3 ASl/y*Al203 41.02 13.19 0.012 25.80 4 ASl/H-ZSM-5 28.27 9.58 0.46 0.52 0.20 17.08 5 ASl/H-Y zeolite 37.47 17.63 2.31 0.21 0.14 16.44 0.06 0.05 17.89 6 ASl/AMSiAl 47.27 27.84 0.13 11.88 7 ASl/ZM760 (mordenite) 32.30 16.88 1.85 0.57 0.35
MeOHb 4.45 5.42 2.03
i-C,*
C,+ C4=b 0.05
0.03 0.44 0.71
0.03 0.02 0.14
0.03
"MeOH component/acidic component (1:l); temperature = 275 OC; pressure = 4 MPa; H,:CO ratio = 21; GHSV = 16000 h-l.
C mol
7%.
1.28
+CSb 0.01 0.01
0.59
