公开(公告)号：US6117404A

公开(公告)日：2000-09-12

申请号：US818625

申请日：1997-03-14

Applicant: Tomio Mimura ,  Hidenobu Shimayoshi ,  Shigeaki Mitsuoka ,  Hiroshi Tanaka ,  Masaki Iijima

Inventor： Tomio Mimura ,  Hidenobu Shimayoshi ,  Shigeaki Mitsuoka ,  Hiroshi Tanaka ,  Masaki Iijima

IPC: B01D53/34 ,  B01D53/14 ,  B01D53/62 ,  B01D53/18

CPC classification number: B01D53/1475 ,  B01D53/1425 ,  Y02C10/04 ,  Y02C10/06

Abstract: The present invention provides a process for recovering a basic amine compound which comprises the steps of (a) supplying a CO.sub.2 -containing gas to a carbon dioxide absorption unit in which an absorbing solution, which contains a basic amine compound, absorbs carbon dioxide; (b) bringing the gas, from which carbon dioxide has been removed, into vapor-liquid contact with a washing water at a temperature from 20 to 60.degree. C. in an amine recovering unit of a carbon dioxide removal tower, recovering part of the basic amine compound accompanying the gas into the water phase and discharging the gas as an exhaust gas of the carbon dioxide removal tower; and (c) collecting the basic amine compound which remains in the exhaust gas of the carbon dioxide removal tower by passing the exhaust gas pass through a demister at a temperature from 20 to 60.degree. C. The basic amine compound can be recovered efficiently from the gas of the carbon dioxide removal tower by using the above process.

Abstract translation: 本发明提供一种回收碱性胺化合物的方法，该方法包括以下步骤：（a）向含有碱性胺化合物的吸收溶液吸收二氧化碳的二氧化碳吸收单元供应含CO 2气体; （b）将二氧化碳除去的气体与20℃至60℃的洗涤水气液接触，在二氧化碳去除塔的胺回收单元中，回收部分 伴随气体进入水相的碱性胺化合物，并且作为二氧化碳去除塔的废气排出气体; 和（c）通过使废气通过除雾器在20℃至60℃的温度下收集留在二氧化碳去除塔的废气中的碱性胺化合物。碱性胺化合物可以从 通过使用上述方法的二氧化碳去除塔的气体。

公开(公告)号：US5618506A

公开(公告)日：1997-04-08

申请号：US511290

申请日：1995-08-04

Applicant: Hitomi Suzuki ,  Atsushi Hayakawa ,  Tomio Mimura ,  Shigeru Shimojo ,  Hidenobu Shimayoshi ,  Masaki Iijima ,  Shigeaki Mitsuoka ,  Toru Iwaki

Inventor： Hitomi Suzuki ,  Atsushi Hayakawa ,  Tomio Mimura ,  Shigeru Shimojo ,  Hidenobu Shimayoshi ,  Masaki Iijima ,  Shigeaki Mitsuoka ,  Toru Iwaki

IPC: B01D53/14 ,  B01D53/62 ,  C01B17/16

CPC classification number: B01D53/62 ,  B01D53/1475 ,  B01D53/1493 ,  Y02C10/04 ,  Y02C10/06

Abstract: This invention relates to the process for removing CO.sub.2 from CO.sub.2 -containing gas such as combustion gas. For example, it is the process for removing CO.sub.2 from combustion gas through the contact of the gas at the atmospheric pressure with an aqueous solution of an amine represented by the general formula R.sup.1 NHC(CH.sub.3).sub.2 CH.sub.2 OH in which R.sup.1 is a lower alkyl group having 1-4 carbon atoms, or an aqueous solution containing both an amine represented by the general formula R.sub.2 CHR.sub.3 NHCH.sub.2 CH.sub.2 OH in which R.sup.2 is a hydrogen atom or a lower alkyl group having 1-4 carbon atoms and R.sup.3 is a hydrogen atom or methyl group and a piperazine compound selected from the group consisting of piperazine, 2-methylpiperazine, 2,3-dimethylpiperazine, and 2,5-dimethylpiperazine, or an mixed aqueous amine solution containing a secondary amine and a tertiary amine at concentrations of 10-45% by weight each, or an aqueous solution of a piperazine derivative.

Abstract translation: 本发明涉及从含CO 2气体如燃烧气体中除去CO 2的方法。 例如，通过大气压下的气体与由通式R 1 NHC（CH 3）2 CH 2 OH表示的胺的水溶液接触，从燃烧气体中除去CO 2的方法，其中R 1是具有1个 -4个碳原子的水溶液，或含有通式为R 2为氢原子或具有1-4个碳原子的低级烷基且R 3为氢原子或甲基的哌嗪化合物的通式为R 2 CHR 3 NHCH 2 CH 2 OH表示的胺的水溶液 选自哌嗪，2-甲基哌嗪，2,3-二甲基哌嗪和2,5-二甲基哌嗪，或者含有浓度为10-45重量％的仲胺和叔胺的混合的胺水溶液， 或哌嗪衍生物的水溶液。