Method for deacidifying a fluid stream and washing liquid used in such a method
First Claim
1. A process for deacidifying a fluid stream comprising an acid gas as an impurity, the process comprising intimately contacting the fluid stream with a scrubbing liquid, separating a fluid stream substantially free of the acid gas from a scrubbing liquid laden with acid gases, wherein the scrubbing liquid is an aqueous solution comprising a) tertiary aliphatic alkanolamines wherein at least 30% by weight of the tertiary aliphatic alkanolamines is 3-dimethylamino-1-propanol and b) secondary aliphatic amines wherein at least 20% by weight of the secondary aliphatic amines is piperazine, and said contacting is performed at a total pressure of 2 bar or higher.
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Abstract
Disclosed is a method for deacidifying a fluid stream containing acidic gases as contaminants, according to which the fluid stream is brought into intimate contact with a washing liquid in at least one absorption step. Said washing liquid represents an aqueous solution containing a) tertiary aliphatic alkanolamines (alkanolamine A), at least 30 percent by weight of said tertiary aliphatic alkanolamines being 3-dimethylamino-1-propanol, and b) secondary aliphatic amines (activator B), at least 20 percent by weight of said secondary aliphatic amines being piperazin. The fluid stream which has been essentially purified of the acidic gases is then separated from the washing liquid that is loaded with acidic gases.
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Citations
8 Claims
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1. A process for deacidifying a fluid stream comprising an acid gas as an impurity, the process comprising
intimately contacting the fluid stream with a scrubbing liquid, separating a fluid stream substantially free of the acid gas from a scrubbing liquid laden with acid gases, wherein the scrubbing liquid is an aqueous solution comprising a) tertiary aliphatic alkanolamines wherein at least 30% by weight of the tertiary aliphatic alkanolamines is 3-dimethylamino-1-propanol and b) secondary aliphatic amines wherein at least 20% by weight of the secondary aliphatic amines is piperazine, and said contacting is performed at a total pressure of 2 bar or higher.
Specification