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US 5,846,405 AGranted
Process oils and manufacturing process for such using aromatic enrichment and two pass hydrofinishing
AssigneeExxon Research & Engineering Co.
InventorsKeith Kaluna Aldous, Jacob Ben Angelo, Joseph Philip Boyle, Bruce M. Jarnot, Wayne E Hanson
Life of this patent
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Abstract
A method for producing a process oil is provided in which an aromatic extract oil is added to a napthenic rich feed. The combined feed is then hydrotreated in a first hydrotreating stage to convert at least a portion of sulfur and nitrogen in the feed to hydrogen sulfide and ammonia. After stripping the feed is subjected to a second hydrotreating stage to provide a process oil.
Claims7
A method for producing a process oil comprising:
- adding an aromatic extract oil to a naphthenic rich to provide a feed for hydrotreating;
- hydrotreating the provided feed in a first hydrotreating stage at a temperature in the range of about 300.degree. C. to about 375.degree. C., a partial hydrogen pressure of 300 to 2500 psia and a liquid hourly space velocity of 0.1 to 2.0 v/v/hr to provide a hydrotreated feed;
- removing hydrogen sulfide and ammonia from the hydrotreated feed;
- thereafter hydrotreating the hydrotreated feed in a second hydrotreating stage at a lower temperature than the first stage and in the range of about 275.degree. C. to about 370.degree. C., a hydrogen partial pressure of 300 to 2500 psig and a space velocity of 0.1 to 2.0 v/v/hr.
1 more element
A method for producing a process oil comprising:
- solvent extracting a napthenic distillate to obtain an aromatic rich solvent stream;
- removing the solvent from the stream to obtain an aromatic rich extract oil;
- adding the aromatic rich extract oil to a naphthenic distillate in the volume ratio of from about 25:75 to about 50:50 to obtain a feed;
- hydrotreating the feed in a first hydrotreating stage at a temperature in the range of about 300.degree. C. to about 375.degree. C., a partial hydrogen pressure of 300 to 2500 psia and a liquid hourly space velocity of 1.0 to 2.0 v/v/hr;
- removing hydrogen sulfide and ammonia from the hydrotreated feed;
- thereafter hydrotreating the feed in a second hydrotreating stage at a lower temperature than the first stage and in the range of about 275.degree. C. to to about 370.degree. C., a hydrogen partial pressure of 300 to 2500 psig and a space velocity of 0.1 to 2.0 v/v/hr.
3 more elements
Dependencies are inferred from the claim text.