DESTRUCTIVE HYDROGENATION OF PARAFFINIC HYDROCARBONS ON HIGH-SILICA ZEOLITES.

The authors are examining results obtained in polyhydrocracking C//5-C//7 paraffins on zeolites of the mordenite and ZSM-5 type in a single-pass laboratory unit in a hydrogen medium under a pressure of 3. 5 MPa. The zeolites in the H form, in a 3:1 weight ratio, were molded with a binder ( gamma -Al//2O//3); before test, the samples were calcined in a flow of air at 500 degree C for 2 h and then reduced with hydrogen at 500 degree C under the working pressure. The relative contributions of disproportion and hydrocracking reactions are illustrated in relation to the molecular weight of the original n-paraffin.