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    • 3. 发明申请
    • PROCESS FOR THE RECOVERY OF CARBON DIOXIDE
    • 回收二氧化碳的方法
    • WO2007068695A1
    • 2007-06-21
    • PCT/EP2006/069597
    • 2006-12-12
    • BASF AKTIENGESELLSCHAFTJGC CORPORATIONLICHTFERS, UteASPRION, NorbertCLAESSEN, MarkUMINO, HiroshiTANAKA, Koji
    • LICHTFERS, UteASPRION, NorbertCLAESSEN, MarkUMINO, HiroshiTANAKA, Koji
    • B01D53/14
    • B01D53/1425B01D53/1475B01D53/1493B01D2257/504Y02A50/2342Y02C10/06
    • A process for the recovery of carbon dioxide, comprising: (a) an absorption step of bringing a carbon dioxide-containing gaseous feed stream into gas-liquid contact with an absorbing fluid, whereby at least a portion of the carbon dioxide present in the gaseous stream is absorbed into the absorbing fluid to produce (i) a refined gaseous stream having a reduced carbon dioxide content and (ii) an carbon dioxide-rich absorbing fluid, (b) a regeneration step of treating the carbon dioxide-rich absorbing fluid at a pressure of greater than 3 bar (absolute pressure) so as to liberate carbon dioxide and regenerate a carbon dioxide-lean absorbing fluid which is recycled for use in the absorption step, wherein the absorbing fluid is an aqueous amine solution containing a tertiary aliphatic alkanol amine and an effective amount of a carbon dioxide absorption promoter, the tertiary aliphatic alkanol amine showing little decomposition under specified conditions of temperature and pressure under co-existence with carbon dioxide. The tertiary aliphatic alkanol amine does not contain, in its molecular structure, a nitrogen atom that is substituted by more than one 2-hydroxyethyl moieties, or a nitrogen atom that is substituted by both a 2-hydroxyethyl moiety and a methyl moiety. Preferred tertiary aliphatic alkanol amines are selected from the group consisting of N-ethyl-diethanolamine, 2-(dimethylamino)-ethanol, 2-(diethylamino)-ethanol, 3-(dimethylamino)-1-propanol, 3-(diethylamino)-1-propanol, 1-(dimethylamino)-2-propanol, and 2-(diisopropylamino)-ethanol.
    • 一种用于回收二氧化碳的方法,包括:(a)吸收步骤,使含二氧化碳的气态进料流与吸收液体气液接触,由此存在于气体中的至少一部分二氧化碳 流被吸收到吸收流体中以产生(i)具有降低的二氧化碳含量的精炼气流和(ii)富二氧化碳吸收流体,(b)再生步骤,其处理富含二氧化碳的吸收流体 大于3巴(绝对压力)的压力以释放二氧化碳并再生用于吸收步骤中的二氧化碳贫乏吸收流体,其中吸收流体是含有叔脂肪烷醇的胺水溶液 胺和有效量的二氧化碳吸收促进剂,叔碳酸烷醇胺在规定的温度和压力条件下几乎没有分解 - 与二氧化碳存在 叔脂族烷醇胺在其分子结构中不含有被多于一个2-羟基乙基部分取代的氮原子或被2-羟基乙基部分和甲基部分所取代的氮原子。 优选的叔脂肪烷醇胺选自N-乙基 - 二乙醇胺,2-(二甲基氨基) - 乙醇,2-(二乙基氨基) - 乙醇,3-(二甲基氨基)-1-丙醇,3-(二乙基氨基) 1-丙醇,1-(二甲基氨基)-2-丙醇和2-(二异丙基氨基) - 乙醇。