Process for converting waxy feeds into low haze heavy base oil
AssigneeChevron U.S.A. Inc.
InventorStephen J. Miller
Life of this patent
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Abstract
The present invention discloses a process for producing a low haze heavy base oil including the steps of: (a) providing a heavy waxy feed stream having an initial boiling point greater than 900° F. and having a paraffin content of at least 80%; (b) separating the heavy feed stream into a heavy fraction and a light fraction by a deep cut distillation; and (c) hydroisomerizing the light fraction to produce a low haze heavy base oil.
Claims39
A process for producing a low haze heavy base oil comprising the steps of:
- (a) providing a heavy waxy feed stream having an initial boiling point greater than 900° F. and having a paraffin content of at least 80%;
- (b) separating the heavy feed stream into a heavy fraction and a light fraction by a deep cut distillation;
- and
- (c) hydroisomerizing the light fraction to produce a low haze heavy base oil.
A process for producing a low haze heavy base oil comprising the steps of:
- (a) providing a heavy Fischer-Tropsch waxy feed;
- (b) separating the heavy Fischer-Tropsch waxy feed into a first light fraction and a first heavy fraction by atmospheric distillation;
- (c) separating the first heavy fraction into a second light fraction and a second heavy fraction by vacuum distillation, the second heavy fraction having an initial boiling point greater than 900° F. and having a paraffin content of at least 80%;
- (d) separating the second heavy fraction into a third light fraction and a third heavy fraction by a deep cut distillation;
- and
- (e) hydroisomerizing the third light fraction to produce a low haze heavy base oil.
A process for producing a low haze heavy base oil comprising the steps of:
- (a) providing a heavy Fischer-Tropsch waxy feed;
- (b) separating the heavy Fischer-Tropsch waxy feed into a first light fraction and a first heavy fraction by atmospheric distillation at a cut point in the range of 600°-750° F.;
- (c) separating the first heavy fraction into a second light fraction and a second heavy fraction by vacuum distillation at a cut point in the range of 900°-1100° F., the second heavy fraction having a paraffin content of at least 80%;
- (d) separating the second heavy fraction into a third light fraction and a third heavy fraction by a deep cut distillation at a cut point in the range of 1200-1300° F.;
- and
- (e) hydroisomerizing the third light fraction to produce a low haze heavy base oil at a temperature from 200° C. to 475° C., at a pressure from 15 psig to 3000 psig, at a liquid hourly space velocity from 0.1 hr−1 to 20 hr−1, and in the presence of hydrogen at a hydrogen to feed ratio from 500 SCF/bbl to 30,000 SCF/bbl.
A process for producing a low haze heavy base oil and wax comprising the steps of:
- (a) providing a heavy waxy feed stream having an initial boiling point greater than 1000° F. and having a paraffin content of at least 80%;
- (b) separating the heavy feed stream into a heavy fraction and a light fraction by a deep cut distillation, the heavy fraction being wax;
- and
- (c) hydroisomerizing the light fraction to produce a low haze heavy base oil.
Dependencies are inferred from the claim text.