초록 ▼

The present invention relates to an alkaline salt promoter system comprising specific mixtures of sterically hindered monosubstituted alpha-amino acids and tertiary amino acids and its use in acid gas scrubbing processes. The preferred promoter system comprises a mixture of N-secondary butyl glycine

The present invention relates to an alkaline salt promoter system comprising specific mixtures of sterically hindered monosubstituted alpha-amino acids and tertiary amino acids and its use in acid gas scrubbing processes. The preferred promoter system comprises a mixture of N-secondary butyl glycine and N-methyl-N-secondary butyl glycine.

대표청구항 ▼

A process for the removal of CO2 from a gaseous stream containing CO2 which comprises contacting said gaseous stream (1) in an absorption step with an aqueous absorbing solution comprising (a) a basic alkali metal salt or hydroxide selected from the group consisting of alkali metal bicarbonates, car

A process for the removal of CO2 from a gaseous stream containing CO2 which comprises contacting said gaseous stream (1) in an absorption step with an aqueous absorbing solution comprising (a) a basic alkali metal salt or hydroxide selected from the group consisting of alkali metal bicarbonates, carbonates, hydroxides, borates, phosphates and their mixtures, and (b) an activator or promoter system for said basic alkali metal salt or hydroxide comprising (i) at least one sterically hindered monosubstituted amino acid and (ii) at least one tertiary amino acid, said amino acids being defined by the general formulae: [Figure] (sterically hindered monosubstituted amino acid) and [Figure] (tertiary amino acid) wherein R is either hydrogen or methyl, R′and R″are each alkyl or substituted alkyl radicals having 1 to 5 carbon atoms, and R′″is a linear alkyl or substituted linear alkyl radical having from 1 to 6 carbon atoms; and (2) in a desorption and regeneration step, desorbing at least a portion of the absorbed CO2 from said absorbing solution.