Vacuum pipestill operation

Details Vacuum pipestill operation Vacuum pipestill operation

1978-11-22

1981-04-14

Levine, Herbert

Mineral oils: processes and products

Fractionation

Distillation

196 98, 196134, 202205, 203 92, 208357, B01D 334

Patent

active

042618142

ABSTRACT:
The invention provides an improvement in the conventional operation of a vacuum pipestill, whereby when used with, for example, an atmospheric residuum either (a) conventional yields are obtainable with less stripping steam utilization, or (b) a deeper cut into the residuum is obtainable for conventional steam utilization. Some of the gaseous mixture normally withdrawn from the top of the vacuum pipestill for washing and removal is fed into compression and recycle means and recycled to the stripping zone of the pipestill to replace, or augment, the conventionally used stripping steam.

REFERENCES:
patent: 1472116 (1923-10-01), Doherty
patent: 2009079 (1935-07-01), Burkhard
patent: 2057004 (1936-10-01), Burkhard
patent: 3110663 (1963-11-01), Miller

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