| 摘要 |
A process for producing a dewaxed, lubricating, oil base stock from a hydrocarbon feedstock that boils above 343≦̸C comprises (a) hydrocracking the feedstock at conditions that effectively convert at least 20 vol.% of the feedstock to materials boiling below the initial b.p. of the feedstock, including a pressure of 6996-20786 kPa; (b) separating the hydrocracked material from contaminated H2 gas contg. H2S and NH3; (c) catalitically dewaxing the hydrocracked material; (d) hydrotreating the dewaxed material; (e) removing H2S and NH3 from the contaminated H2 gas; and (f) recycling the hydrogen gas to the hydrocracker section.
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