公开(公告)号：US06312655B1

公开(公告)日：2001-11-06

申请号：US09297891

申请日：1999-07-13

申请人： Horst Joachim Franz August Hesse ,  Mathys Johannes Smit ,  Francois Jacobus du Toit

发明人： Horst Joachim Franz August Hesse ,  Mathys Johannes Smit ,  Francois Jacobus du Toit

IPC分类号： B01D5362

CPC分类号： B01D53/96 ,  B01D53/1475 ,  C23F11/06 ,  Y02C10/04 ,  Y02C10/06

摘要： The invention relates to the absorption of carbon dioxide from a process gas using a solution of potassium carbonate, potassium bicarbonate, diethanolamine and potassium vanadate, followed by desorption of the carbon dioxide from the solution and recycling the regenerated solution. Organic acid salts of potassium build up in the aqueous solution is diluted with aqueous diluent, and then passed over a semi-permeable membrane such as a nanofiltration membrane, and ultrafiltration membrane or a reverse-osmosis membrane using a pressure drop to remove the organic acid salts of potassium from the side stream.

摘要翻译： 本发明涉及使用碳酸钾，碳酸氢钾，二乙醇胺和钒酸钾溶液从工艺气体中吸收二氧化碳，然后将二氧化碳从溶液中解吸并再循环再生溶液。 在水溶液中积聚的钾的有机酸盐用水稀释剂稀释，然后通过半透膜如纳滤膜，超滤膜或反渗透膜，使用压降除去有机酸 来自侧流的钾盐。