Multiple effect and distributive separation of isobutane and nor

Details Multiple effect and distributive separation of isobutane and nor Multiple effect and distributive separation of isobutane and nor

1996-04-05

1998-09-15

Kilner, Christopher

Refrigeration

Cryogenic treatment of gas or gas mixture

Separation of gas mixture

62926, F25J 302

Patent

active

058063390

ABSTRACT:
The present invention is an enhancement of the prior art use of partial effects and component distribution regarding NGL fractionation, especially relating to the separation of propane, isobutane, normal butane and gasoline components. The present invention distributes butanes in two separate columns and integrates the thermodynamic efficiency obtained with partial effects to cascade reboiling duty through as many as four separate columns. The resulting savings in energy are compared with the prior art process of sequential fractionation of NGL.

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P. C. Wankat, "Multieffect Distillation Processes" (Ind. Eng. Chem. Res., vol. 32, pp. 894-905, 1993).

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