Liquid purification or separation – Processes – Chromatography
Reexamination Certificate
2007-03-20
2007-03-20
Therkorn, Ernest G. (Department: 1723)
Liquid purification or separation
Processes
Chromatography
C210S662000, C210S198200, C585S821000, C585S828000
Reexamination Certificate
active
10525960
ABSTRACT:
Method of optimizing the operation of a unit intended for separation of the components of a feed (xylenes) by simulated countercurrent in hybrid operating mode.The method allows to minimize the solvent ratio and to maximize the capacity of the separation unit while keeping product specifications such as purity and yield constant. It has been verified that these two objectives cannot be reached simultaneously and it is recommended to operate with a minimum solvent ratio while guaranteeing a high capacity compatible with stable operation of the separation unit. These optimization objectives are reached while keeping good stability around the optimum point thus defined, by using a known operation control process such as the one described in patent EP-875,268 for example.
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Couenne Nicolas
Wolff Luc
Antonelli, Terry Stout and Kraus, LLP.
Institut Francais du Pe'trole
Therkorn Ernest G.
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