Mineral oils: processes and products – Chemical conversion of hydrocarbons – Plural serial stages of chemical conversion
Reexamination Certificate
2007-07-03
2007-07-03
Nguyen, Tam M. (Department: 1764)
Mineral oils: processes and products
Chemical conversion of hydrocarbons
Plural serial stages of chemical conversion
C585S008000, C585S008000, C585S008000, C585S925000, C585S266000
Reexamination Certificate
active
11015902
ABSTRACT:
In the refining of crude oil, hydroprocessing units such as hydrotreaters and hydrocrackers are used to remove impurities such as sulfur, nitrogen, and metals from the crude oil. They are also used to convert the feed into valuable products such as naphtha, jet fuel, kerosene and diesel. The current invention provides very high to total conversion of heavy oils to products in a single high-pressure loop, using multiple reaction stages. The second stage or subsequent stages may be a combination of co-current and counter-current operation. The benefits of this invention include conversion of feed to useful products at reduced operating pressures using lower catalyst volumes. Lower hydrogen consumption also results. A minimal amount of equipment is employed. Utility consumption is also minimized.
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patent: 6787025 (2004-09-01), Mukherjee et al.
patent: 6797154 (2004-09-01), Mukherjee et al.
patent: 7128828 (2006-10-01), Kalnes
Dahlberg Arthur J.
Louie Wai Seung W.
Mayer Jerome F.
Mukherjee Ujjal K.
Chevron U.S.A. Inc.
Nguyen Tam M.
Prater Penny L.
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