Distillation process control for maximum recovery using minimum

Mineral oils: processes and products – Fractionation – Distillation

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Details

208DIG1, 202206, 202106, 196132, B01D 342

Patent

active

047174684

ABSTRACT:
An improved distillation process and apparatus are provided whereby liquid product recovery other than bottom product is maximized and feed stream heating is minimized. Inert gas streams combined with the feed stream and introduced into the distillation tower are controlled whereby feed stream heater residence time and partial pressures of feed stream components are minimized. The temperature of the combined inert gas-feed stream exiting the feed stream heater is controlled at a minimum temperature by establishing signals representative of overflash, bottom product specification and other conditions and comparing such signals whereby the signal which represents the lowest heater outlet temperature is utilized for controlling the heater operation.

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patent: 4295196 (1981-10-01), Furr
patent: 4392877 (1983-07-01), Funk
patent: 4501657 (1985-02-01), Nollkamper

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