B - Operations – Transporting – 01 – D
Patent
B - Operations, Transporting
01
D
202/55
B01D 3/42 (2006.01)
Patent
CA 1213848
ABSTRACT OF THE DISCLOSURE: A process for controlling a distillation column. The proces includes heating a feed liquid supplied thereto by steam, and comprises the steps of comparing a bottom temperature of the column with a calculated boiling point temperature of the bottom liquid and increasing the steam flow rate when the bottom temperature is lower than the calculated boiling point temperature, until the bottom temperature is greater than the calculated boiling point temperature; then while maintaining the bottom temperature greater than the calculated boiling point, adjusting the tempe- rature at an intermediate tray of the column to within a predetermined temperature range by adjusting the steam flow rate. Then, while maintaining the predetermined temperature range, adjusting a ratio of the reflux flow rate to feed flow rate to within a predetermined ratio range by adjusting the steam flow rate; and then maintaining the predetermined temperature range and predetermined ratio range by adjusting the steam flow rate.
460569
Nippon Zeon Co. Ltd.
Robic Robic & Associes/associates
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