Purifying feed for reforming over zeolite catalysts

Details Purifying feed for reforming over zeolite catalysts Purifying feed for reforming over zeolite catalysts

1990-12-19

1992-04-21

McFarlane, Anthony

Mineral oils: processes and products

Chemical conversion of hydrocarbons

With preliminary treatment of feed

208138, 208188, 208208R, 208248, 208299, 208301, 208302, 208303, 585820, 585836, 585850, 585852, 585853, C10G 3506, C10G 2500, C07C 712, C07C 700

Patent

active

051064847

ABSTRACT:
The present invention is directed to a process for treating hydrotreated naphtha which involves treating the naphtha over massive nickel catalyst followed by treating the naphtha over a metal oxide under conditions effective for removing impurities from said naphtha to result in substantially purified naphtha, wherein the metal oxide is selected from the group of metal oxides having a free energy of formation of sulfide which exceeds said free energy of formation of platinum sulfide, such as manganous oxide. In so doing, naphtha in the gas phase in the presence of hydrogen is passed over the manganous oxide at a temperature within the range of about 800.degree. F. and 1100.degree. F., a hydrogen to oil molar ratio between about 1:1 and 6:1, a whsv between about 2 and 8, and pressure between about 50 and 300 psig; and the naphtha in the liquid phase at a temperature between about 300.degree. F. and about 350.degree. F., and whsv less than about 5 is passed over the massive nickel.
The naphtha in the liquid phase, at about ambient temperature, and at a whsv between 2 and 10, may also be passed over a Na Y mole sieve prior to treating over massive nickel and manganous oxide. In addition the naphtha be being passed over alumina after treating over massive nickel and prior to treating over manganous oxided in the liquid phase, at a temperature between 300.degree. F. and 350.degree. F., and a whsv between 2 and 10.
The naphtha may also be passed over a mole sieve water trap in the liquid phase at ambient temperature and at a whsv between 2 and 10, prior to treating over massive nickel and manganous oxide.

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