Absorption of CO.sub.2 and/or H.sub.2 S utilizing solutions cont

Details Absorption of CO.sub.2 and/or H.sub.2 S utilizing solutions cont Absorption of CO.sub.2 and/or H.sub.2 S utilizing solutions cont

1981-10-09

1984-02-28

Thomas, Earl C.

Chemistry of inorganic compounds

Modifying or removing component of normally gaseous mixture

Carbon dioxide or hydrogen sulfide component

423226, 423229, 423232, B01D 5334, B01D 5336

Patent

active

044341440

ABSTRACT:
The removal of CO.sub.2 and mixtures thereof with H.sub.2 S from gaseous mixture containing same, is carried out by using an absorbing solution which comprises a first activating substance chosen from aminoacids and primary and secondary ethanolamines, which effects the initial absorption of CO.sub.2 with formation of a carbamate, a second activating substance chosen from As.sub.2 O.sub.3 and its derivatives, secondary ethanolamines and ammonia, which promotes the hydrolysis and decomposition of the carbamate as the latter forms, and a third substance of a basic nature, which effects the quantitative absorption of CO.sub.2 or CO.sub.2 +H.sub.2 S.

REFERENCES:
patent: 3144301 (1964-08-01), Mayland
patent: 3848057 (1974-11-01), Leder et al.
patent: 3856921 (1974-12-01), Shrier et al.
patent: 3864449 (1975-02-01), Homberg et al.
patent: 4094957 (1978-06-01), Sartori et al.

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