C - Chemistry – Metallurgy – 10 – G
Patent
C - Chemistry, Metallurgy
10
G
C10G 61/06 (2006.01) C10G 67/06 (2006.01) C10G 69/08 (2006.01)
Patent
CA 2098728
The present invention is directed to a process for treating hydro- treated naphtha which involves treating the naphtha over massive nickel catalyst followed by treating the naphtha over a metal oxide un- der conditions effective for removing impurities from said naphtha to result in substantially purified naphtha, wherein the metal oxide is se- lected from the group of metal oxides having a free energy of forma- tion of sulfide which exceeds said free energy of formation of plati- num sulfide, such as manganous oxide. In doing so, 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 ° F and 1100 °F, a hydrogen to oil molar ratio between about 1:1 and 6:1, a whsv be- tween 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 °F and about 350 °F, and whsv less than about 5 is passed over the mas- sive nickel. The naphtha in the liquid phase, at about ambient temper- ature, and at a whsv between 2 and 10, may also be passed over an Na Y mole sieve prior to treating over massive nickel and manganous ox- ide. In addition the naphtha be being passed over alumina after treat- ing over massive nickel and prior to treating over manganous oxide in the liquid phase, at a temperature between 300 °F and 350 °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 man- ganous oxide.
Brown David Scott
Nadler Murray
Walsh John Frances
Borden Ladner Gervais Llp
Exxon Chemical Patents Inc.
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