摘要:
A description is given of an absorption medium for deacidifying fluid streams which has improved oxidation stability and comprises at least one aliphatic amine, in particular an alkanolamine, and at least one non-hydroquinoid antioxidant. The absorption medium serves for deacidifying a fluid stream, in particular an oxygen-containing fluid stream, the fluid stream being brought into intimate contact with the absorption medium in at least one absorption step.
摘要:
A description is given of the use of an alkylenediamine of the type R1HN—X—NHR2, where X is an alkylene radical having from 2 to 9 carbons, R1 is a hydrocarbon radical having from 1 to 6 carbons and R2 is a hydrocarbon radical having from 1 to 6 carbons or is hydrogen (H) for removing sour gases from a sour-gas-containing fluid stream, and of a process for deacidifying a fluid stream of this type and a wash liquid or absorption liquid for use in such a process. According to the invention, in at least one absorption step, the fluid stream is brought into intimate contact with a wash liquid, the wash liquid comprising an aqueous amine solution which comprises at least one tertiary aliphatic alkanolamine having from 2 to 12 carbons and an activator of the above type R1HN—X—NHR2. The fluid stream which is substantially freed from sour gases and the sour-gas-loaded wash liquid are then separated from one another.
摘要:
A process for removing acidic gas constituents, of the group consisting of CO2, H2S, COS, CS2 and mercaptans, from gases, in which, in an absorption step, a dirty gas rich in acidic gas constituents is brought into contact with an absorption medium, as a result of which a clean gas low in acidic gas constituents and an absorption medium laden with acidic gas constituents are obtained, the absorption medium used being a mixture comprising a) from 0.1 to 50% by weight of one or more mono-cyclic or bicyclic nitrogen heterocycles which are unsubstituted and/or monosubstituted or poly-substituted on the carbon by OH, C1-C3 alkyl and/or C1-C3 hydroxyalkyl and which have from 5 to 14 ring atoms and 1 or 2 heterocyclically bound nitrogen atoms per ring as component A, b) from 1 to 60% by weight of a monohydric and/or polyhydric alcohol as component B, c) from 0 to 60% by weight of an aliphatic aminoalcohol as component C, d) from 0 to 98.9% by weight of water as component D, e) from 0 to 35% by weight of K2CO3 as component E, where the sum of components A, B, C, D and E is 100% by weight.