Title:
【発明の名称】石油残油供給原料の長期高水素化転化方法
Document Type and Number:
Japanese Patent JPH0772274
Kind Code:
B2
Abstract:
A process for high hydroconversion of petroleum residua containing at least about 25 V % material boiling above 975 DEG F. to produce lower boiling hydrocarbon liquid products and avoid undesirable precipitation of asphaltene compounds. In the process, the feedstock is at least about 80 percent catalytically hydroconverted to material boiling below 975 DEG F. and containing a mixture of gas and liquid fractions, after which the gas fraction is removed while maintaining the resulting liquid fractions temperature above about 730 DEG F. to avoid precipitation of asphaltene compounds which causes operations difficulties in the downstream equipment. Alternatively, the pressure-reduced liquid fraction can be stripped of material boiling below about 650 DEG F. before cooling the liquid to a temperature below about 730 DEG F. to prevent such precipitation of asphaltene compounds in the downstream equipment. The resulting liquid fraction is distilled to produce hydrocarbon liquid products, and a vacuum bottoms fraction is recycled to the catalytic reaction step to obtain increased percent conversion to lower boiling liquid products.
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Inventors:
Michael shi-chierbinatsk
Lithia-De M Ikris
Gobanon Nongburi
Lithia-De M Ikris
Gobanon Nongburi
Application Number:
JP25246083A
Publication Date:
August 02, 1995
Filing Date:
December 26, 1983
Export Citation:
Assignee:
HIR Inc.
International Classes:
C10G49/22; C10G47/26; C10G67/14; (IPC1-7): C10G67/14; C10G49/22
Domestic Patent References:
| JP4743281B1 |
Other References:
【文献】米国特許3842122(US,A)
【文献】米国特許3948756(US,A)
【文献】米国特許3948756(US,A)
Attorney, Agent or Firm:
Akihide Sugimura (1 outside)