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1. 发明申请

WO1996008464A1 PROCESS TO PRODUCE AMINOCARBOXYLIC ACIDS CONTAINING LOW RESIDUAL SALT 审中-公开
标题翻译：生产含有低残留盐的氨基羧酸的方法
公开(公告)号：WO1996008464A1
公开(公告)日：1996-03-21
申请号：PCT/US1995011093
申请日：1995-09-05
申请人： THE DOW CHEMICAL COMPANY
发明人： THE DOW CHEMICAL COMPANY , GRIERSON, Jeffrey, G. , COSTAIN, Cameron, T. , WILSON, David, A.
IPC分类号： C07C227/40
CPC分类号： C07C227/40 , C07C227/18
摘要： A method for producing an aqueous solution of an aminocarboxylic acid from an aqueous solution of an alkali metal salt of the aminocarboxylic acid is disclosed. The first step of the method is to adjust the pH of the aqueous solution of the alkali metal salt of the aminocarboxylic acid to between 1.0 and 3.0. This is done by adding a monovalent inorganic acid to the aqueous solution of the alkali metal salt of the aminocarboxylic acid to form an aqueous feed solution containing protonated aminocarboxylic acid and an inorganic alkali salt having an inorganic anion and an alkali metal cation. The second step of the method is to pass the aqueous feed solution through at least one membrane using a diafiltration process to separate the aqueous feed solution into an aqueous permeate solution, containing the alkali metal cation, and an aqueous retentate solution containing the aminocarboxylic acid.
摘要翻译：公开了一种由氨基羧酸的碱金属盐的水溶液制备氨基羧酸的水溶液的方法。该方法的第一步是将氨基羧酸的碱金属盐的水溶液的pH调节至1.0至3.0。这是通过向氨基羧酸的碱金属盐的水溶液中加入一价无机酸来形成含有质子化氨基羧酸的水性进料溶液和具有无机阴离子和碱金属阳离子的无机碱金属盐。该方法的第二步是使用渗滤方法将含水进料溶液通过至少一个膜，以将含水进料溶液分离成含有碱金属阳离子的含水渗透液和含有氨基羧酸的含水滞留物溶液。

2. 发明公开

EP0781269A1 PROCESS TO PRODUCE AMINOCARBOXYLIC ACIDS CONTAINING LOW RESIDUAL SALT 失效
标题翻译：用于生产氨基盐的低残余含量
公开(公告)号：EP0781269A1
公开(公告)日：1997-07-02
申请号：EP95931045.0
申请日：1995-09-05
申请人： THE DOW CHEMICAL COMPANY
发明人： GRIERSON, Jeffrey, G. , COSTAIN, Cameron, T. , WILSON, David, A.
IPC分类号： C07C227
CPC分类号： C07C227/40 , C07C227/18
摘要： A method for producing an aqueous solution of an aminocarboxylic acid from an aqueous solution of an alkali metal salt of the aminocarboxylic acid is disclosed. The first step of the method is to adjust the pH of the aqueous solution of the alkali metal salt of the aminocarboxylic acid to between 1.0 and 3.0. This is done by adding a monovalent inorganic acid to the aqueous solution of the alkali metal salt of the aminocarboxylic acid to form an aqueous feed solution containing protonated aminocarboxylic acid and an inorganic alkali salt having an inorganic anion and an alkali metal cation. The second step of the method is to pass the aqueous feed solution through at least one membrane using a diafiltration process to separate the aqueous feed solution into an aqueous permeate solution, containing the alkali metal cation, and an aqueous retentate solution containing the aminocarboxylic acid.

3. 发明授权

EP0582632B1 PROCESS AND APPARATUS FOR REMOVAL OF H2S FROM GASEOUS STREAMS USING MEMBRANE PURIFICATION OF RECYCLE SOLUTION 失效
标题翻译：方法和设备用于去除气流利用膜清洗电路解决方案H2S
公开(公告)号：EP0582632B1
公开(公告)日：1999-03-31
申请号：EP92910037.8
申请日：1992-02-27
申请人： THE DOW CHEMICAL COMPANY
发明人： GRIERSON, Jeffrey, G. , ALLEN, Mark, C.
IPC分类号： C01B17/05 , B01D53/34 , B01D61/02 , B01D53/14 , B01D61/58
CPC分类号： B01D61/027 , B01D53/1425 , B01D53/52 , B01D61/145 , B01D61/147 , B01D61/58 , C01B17/05

4. 发明公开

EP0582632A1 PROCESS AND APPARATUS FOR REMOVAL OF H 2?S FROM GASEOUS STREAMS USING MEMBRANE PURIFICATION OF RECYCLE SOLUTION 失效
标题翻译：方法和设备用于去除气流利用膜清洗电路解决方案H2S。
公开(公告)号：EP0582632A1
公开(公告)日：1994-02-16
申请号：EP92910037.0
申请日：1992-02-27
申请人： THE DOW CHEMICAL COMPANY
发明人： GRIERSON, Jeffrey, G. , ALLEN, Mark, C.
IPC分类号： B01D53 , B01D61 , C01B17
CPC分类号： B01D61/027 , B01D53/1425 , B01D53/52 , B01D61/145 , B01D61/147 , B01D61/58 , C01B17/05
摘要： La régénération des ions métalliques polyvalents chélatés par des agents de chélation essentiellement monomères, en vue de leur utilisation dans des systèmes d'élimination de H2S, est facilitée par une opération de filtrage par membrane nanoporeuse (15) de la solution de chélate métallique (14). L'opération de filtrage par membrane nanopreouse permet d'éliminer de la solution de réaction redox (14) l'eau accumulée et les produits de dégradation des agents de chélation ainsi que les agents contaminant la solution. Une solution redox purifiée et concentrée (17) est ainsi produite en vue des opérations de régénération et de recyclage vers un contacteur gaz-liquide (2). Un prolongement de la durée de vie de la solution redox est obtenu et l'utilisation de fer comme ion polyvalent est appropriée.

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