| In this study, the feasibility of oxidizing ethylene to acetaldehyde with a modified Wacker catalyst (referred to herein as KDS catalyst) composed of a chlorinated solution of PdCl(,2), CuCl(,2), and Cu(NO(,3))(,2) supported on alumina was studied at reaction temperatures in the range of 40 (TURN) 80(DEGREES)C.; Three different kinds of alumina support, Cyanamid Aero 1000, Harshaw AL-0104, and Katalco No. 83-8096 were tested. The Cyanamid alumina with a small average pore radius, large surface area, and generally uniform pore structure, proved to be the best support material, yielding the most active catalyst.; This work showed that the KDS catalyst was stable for the ethylene oxidation with an active life of approximately 60 hours.; The supported liquid phase character of these catalysts was recognized and studied. The optimum liquid loading in the SLPC, (delta), was found to be 0.1, and the optimum average pore diameter of the support was estimated to be approximately 30 (ANGSTROM).; The intrinsic reaction kinetics for ethylene oxidation on the KDS-Wacker catalyst at mild conditions was also studied in this work. The resultant rate equation was of the form: r = 0.816 x 10('9) C(,2)H(,4) ('1.2)EXP(-13,100/RT). This equation agreed with experimental data to within (+OR-)20%. |
