Process for the improved production of middle distillates jointl

Details Process for the improved production of middle distillates jointl Process for the improved production of middle distillates jointl

1994-10-24

1996-06-11

Myers, Helane

Mineral oils: processes and products

Chemical conversion of hydrocarbons

Plural serial stages of chemical conversion

208 57, 208 89, C01G 6518

Patent

active

055252095

ABSTRACT:
A process for the joint production of middle distillates and oil bases (viscosity index between 95 and 150) particularly from vacuum distillates and/or deasphalted oils, comprises a first step in which the feedstock is brought into contact with an amorphous catalyst containing at least one metal or metallic compound with a hydro-dehydrogenating function, such as Ni, Mo, W or Co, at a temperature of between 350.degree. C. and 430.degree. C., a pressure of between 5 and 20 MPa, a space velocity of between 0.1 and 5 h.sup.-1 in the presence of hydrogen in a ratio H.sub.2 /HC of 150 to 2,000 by volume. The product from the first step is brought into contact in a second step with a second catalyst comprising a support, a Y zeolite, at least one group VIB element and at least one group VIII metal at a temperature of between 350.degree. C. and 430.degree. C., a pressure of between 5 and 20 MPa and a space velocity of between 0.1 and 5 h.sup.-1.

REFERENCES:
patent: 3385781 (1968-05-01), Hamner et al.
patent: 4689137 (1987-08-01), Clark
patent: 4797195 (1989-01-01), Kukes et al.
patent: 4875991 (1989-10-01), Kukes et al.
patent: 4940530 (1990-07-01), Kukes et al.
patent: 5198099 (1993-03-01), Trachte et al.

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