Process for the control of a continuous distillation process

Details Process for the control of a continuous distillation process Process for the control of a continuous distillation process

B - Operations, Transporting

01

D

202/55

B01D 3/42 (2006.01)

Patent

CA 1048961

A B S T R A C T A process for the control of a continuous process for the separation of a feed stream into at least two product streams in a distillation column, the objective being to attain desired values for controlled conditions (G1, G2, . . . ) by adjustment of correcting conditions (C1, C2, . . . ), in which process one of the correcting conditions (C1) is chosen for the control of one of the product qualities (G1), whereupon one of the remaining correcting conditions (C2) is modified until a constraint on C1 or C2 or on one of the remaining controlled conditions (G2) is reached, care being taken to maintain the constrained condition at that limiting value, either directly if C1 or C2 is concerned or by means of C2 if G2 is concerned which process of modifiying one of the correcting conditions until a constraint on one of the correcting or controlled conditions is reached and maintaining it at the limiting value is effected simultaneously or repeated successively for the remaining conditions, and which process starts anew as soon as a change takes place in the separation process.

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