Process for removing carbon dioxide from gas mixture

Details Process for removing carbon dioxide from gas mixture Process for removing carbon dioxide from gas mixture

1996-09-30

1999-01-19

Smith, Duane S.

Gas separation: processes

Liquid contacting

And degasification of a liquid

95177, 95192, 95235, 95236, B01D 4706

Patent

active

058610510

ABSTRACT:
This invention relates to a process for the separation of carbon dioxide and hydrogen sulfide from gases using a promoted methyldiethanolamine (MDEA) solution. In one broad respect, this invention is a gas separation process, including contacting an aqueous treating solution with a sour gas stream that contains carbon dioxide and hydrogen sulfide under conditions such that the gas stream is sweetened, wherein the aqueous treating solution contains methyldiethanol amine and 2-(2-aminoethoxy)ethanol in a ratio of at least about 2:1; and wherein the process is conducted in the absence of a reclamation step. By practice of this invention, the amount of 2-(2-aminoethoxy)ethanol that is converted to urea(bis-(2-hydroxyethoxyethyl)urea (BHEEU)) is minimized which obviates the need for a reclamation (regeneration) unit.

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