Naphtha re-forming

Following the above finding, the cumene test for acidity was applied to a large variety of re-forming catalyst samples for which the naphtha re-forming activity was also evaluated and for which the cyclohexane activity was measured and found to be in excess of 100 jumoles/sec./g. 

This study was also applied to some catalysts which have lost activity because of aging during naphtha re-forming. These samples had not lost sufficient (de)hydrogenation activity to give a reduction in the concentration of the olefinic intermediate. They show the same correlation between the results of the cumene test and the inlet temperatme required to re-form naphtha to 98 O.N., which applied to the study of fresh catalysts. This is shown in Fig. 4 for the pairs of fresh and aged catalyst. 

Synthesis gas is prepared by the steam reforming or partial oxidation of a liquid or gaseous hydrocarbon feedstock, or by direct combination of carbon dioxide wilh purified hydrogcn-ricli gases. Economic considerations usually favor the steam-re form mg route for a naphtha or natural gas... 

In re-forming a virgin naphtha over molybdena on alumina, best performance was attained with a cogelled catalyst containing about 10% molybdena. In order to understand the fundamental aspects of this performance, several physicochemical properties of cogelled catalysts were investigated. These studies extend our knowledge of the complex chemistry of molybdena and of its interaction with the alumina support. 

We have sought to determine by independent measurement individual activities characteristic of the (de)hydrogenation and of the acidic function of dual-function re-forming catalysts and to test for the existence of the type of relationship described above between these component activities and the over-all activity of the catalysts as seen in actual naphtha reforming. 

Bitepazh s paper. The catalytic activity was checked by two reactions, namely, cracking a crude oil with a boiling range of 210-300°, and re-forming of a naphtha fraction (aromatic content 0%). 

Much of the production of xylene comes from the re-forming of naphtha (C8) streams, with mixtures of ortho-, meta-, and para-xylenes, which must be separated and purified. 

The naphtha is recovered from the dewaxed oil solution in conventional distillation equipment. The wax cake containing the filter aid is discharged from the dewaxing filter into a heated vessel, where the wax is taken into solution and the inert filter aid settles to the bottom in the form of a concentrated slurry. The aid separated from the wax solution is slurried with kerosene and this slurry is filtered on a continuous filter at a temperature sufficiently high to flash off water adsorbed on the aid. The dried and recovered aid on the filter is subjected to a chilled naphtha wash to displace the kerosene and cool the aid, which is then recycled to the chilled oil-naphtha mixture. Recovery of the aid in this manner permits its re-use indefinitely. 

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