Process for separating undesirable components from gaseous mixtu

Details Process for separating undesirable components from gaseous mixtu Process for separating undesirable components from gaseous mixtu

1986-02-18

1987-10-27

Nozick, Bernard

Gas separation

Means within gas stream for conducting concentrate to collector

55 73, B01D 4700

Patent

active

047027509

ABSTRACT:
A process is disclosed for the separation of undesirable e.g., SO.sub.2, from gaseous mixtures. Separation takes place by scrubbing in a first scrubbing column with a physical absorbing agent, which after absorbing the undesirable components is regenerated in a regenerating column and recycled to the first scrubbing column. During regeneration, a stream containing the undesirable components, as well as an inert gas components is obtained. The undesirable gas components and the inert gas components are separated in a further process e.g., a distillation stage. During this stage the undesirable components are removed as product and the inert gases, still containing a substantial fraction of undesirable components, are returned to the scrubbing stage. In order to economically recycle only a small amount of undesirable components back to the scrubbing column, during the recycling of inert gas the inert gases are at least partially separated in a second scrubbing column from the undesirable components by contacting with small stream of a physical absorbing agent. The inert gases are then passed to the first scrubbing column.

REFERENCES:
patent: 3738086 (1973-06-01), Belliso et al.
patent: 3954425 (1976-05-01), Gunther
patent: 4110087 (1978-08-01), Nolley
patent: 4552572 (1985-11-01), Galstaun
patent: 4589889 (1986-05-01), Spencer
Becker, H., et al, "The Linde Solinox.RTM. Process for Flue-Gas Purification", Reports on Science and Techn., 40/1985.

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