Gas purification process

Details Gas purification process Gas purification process

1981-03-12

1983-02-01

Adee, John

Gas separation

Means within gas stream for conducting concentrate to collector

55 73, 62 24, B01D 5334

Patent

active

043713815

ABSTRACT:
A gas mixture comprising carbon dioxide, at least one gas having a lower boiling point than carbon dioxide, and at least one gaseous impurity having a higher boiling point than carbon dioxide (the impurity typically being hydrogen sulphide) is purified by a rectification process. The gas mixture (typically with a carbon dioxide partial pressure of 20 atmospheres) is precooled to the dewpoint of the carbon dioxide or below and is then rectified to form a liquid fraction relatively rich in the impurity or impurities and a product gaseous fraction relatively lean in or free from the gaseous impurity or impurities. The liquid fraction may be subjected to a second rectification to yield pure carbon dioxide.

REFERENCES:
patent: 3508413 (1970-04-01), Paroa
patent: 3702541 (1972-11-01), Randall et al.
patent: 4251247 (1981-02-01), Gauberthier et al.
patent: 4270937 (1981-06-01), Adler
patent: 4274850 (1981-06-01), Becker

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