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- W155026521 abstract "At present, it appears that tertiary ethanolamines, if properly used, are substantially more economical for a variety of selective and nonselective gas-purification operations than primary and secondary ethanolamines. Examples of such operations are: selective H/sub 2/S removal from natural and synthesis gases, absorption of high concentrations of CO/sub 2/ from gas streams available at high pressure, and selective H/sub 2/S removal from waste gases, e.g., Claus tail gas. The principal advantages of tertiary over primary and secondary ethanolamines are, besides their selectivity for H/sub 2/S, their lower heat of reaction with the acid gases (and consequent lower heat requirements for solution stripping); their lower vapor pressure, permitting use of high concentration and high capacity in the treating solution; their nonreactivity with COS and CS/sub 2/, avoiding formation of nonregenerable compounds; and their lower corrosiveness, allowing carbon-steel construction throughout the plant. If these features are combined, it becomes clear that tertiary ethanolamines are the proper choice for many gas-purification systems. Among the tertiary ethanolamines, methyldiethanolamine (MDEA) is the preferred amine, although triethanolamine (TEA) is also useful for CO/sub 2/ absorption." @default.
- W155026521 created "2016-06-24" @default.
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- W155026521 date "1986-09-01" @default.
- W155026521 modified "2023-09-23" @default.
- W155026521 title "Tertiary ethanolamines more economical for removal of H/sub 2/S and carbon dioxide" @default.
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