Mineral oils: processes and products – Refining – Sulfur removal
Reexamination Certificate
2003-10-09
2008-10-14
Nguyen, Tam M. (Department: 1764)
Mineral oils: processes and products
Refining
Sulfur removal
C208S210000, C208S21600R, C208S217000, C208S25400R
Reexamination Certificate
active
07435336
ABSTRACT:
The present invention relates to a process for carrying our gas-liquid countercurrent processing comprising passing the liquid material and the gas reactant in countercurrent flow through the fixed bed of catalyst in a reactor, characterized in that the fixed bed of catalyst includes two or more catalyst layers, with the difference of voidage between the adjacent catalyst layers being at least 0.05. The voidages of the catalyst layers can be increased or decreased in the direction of the flow of the liquid phase. The process of the invention can be effected with an increased range of gas-liquid ratio and an improved stability and flexibility.
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Fang Xiangchen
Han Baoping
Jin Mei
Sun Hongjiang
Wu Ping
China Petroleum & Chenical Corporation
Cohen Pontani Lieberman & Pavane LLP
Fushun Research Institute of Petroleum and Petrochemicals Sinope
Nguyen Tam M.
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