公开(公告)号：EP0096239B1

公开(公告)日：1987-12-16

申请号：EP83104733.7

申请日：1983-05-13

申请人： ALLIED CORPORATION

发明人： Mani, Krishnamurthy N. ,  Chlanda, Frederick P.

IPC分类号： B01D13/02 ,  D01F13/02 ,  C01D5/00

CPC分类号： C25B1/14 ,  B01D61/445 ,  C25B1/16 ,  C25B1/22 ,  D01F13/02 ,  Y02P70/627

公开(公告)号：EP0124007B1

公开(公告)日：1987-10-21

申请号：EP84104317.7

申请日：1984-04-17

申请人： ALLIED CORPORATION

发明人： Mani, Krishnamurthy N. ,  Chlanda, Frederick P.

IPC分类号： B01D13/02 ,  C25B1/22 ,  C25B1/16

CPC分类号： B01D61/445 ,  C25B1/16 ,  C25B1/22

公开(公告)号：EP0096239A3

公开(公告)日：1985-10-30

申请号：EP83104733

申请日：1983-05-13

申请人： ALLIED CORPORATION

发明人： Mani, Krishnamurthy N. ,  Chlanda, Frederick P.

IPC分类号： B01D13/02 ,  D01F13/02 ,  C01D05/00

CPC分类号： C25B1/14 ,  B01D61/445 ,  C25B1/16 ,  C25B1/22 ,  D01F13/02 ,  Y02P70/627

摘要： A process for conversion of alkali metal sulfate such as sodium or potassium sulfate values comprised of spent rayon spin bath liquors Into alkali metal hydroxide and alkali metal sulfate/sulfuric acid by use of two- or three-compartment electrodialytic water splitter cells (120, 220) which comprises (a) feeding a liquid comprising water to the base compartment (B) of a two- or three-compartment cell; (b) feeding liquid comprising at least a portion of alkali metal sulfate values derived from spent rayon spin bath liquors to the acid compartments (A) of the two-compartment cell and to the salt compartments (S) of a three-compartment cell; (c) feeding a liquid comprising another portion of spent rayon spin bath liquors comprised of alkali metal sulfate values to the acid compartments (A) of a three-compartment cell; (d) passing direct current through said cells while maintaining an average temperature in at least the two-compartment cell of at least 40°C; and (e) withdrawing a liquid comprising alkali metal sulfate and sulfuric acid from said acid compartments (A), a liquid comprising alkali metal hydroxide from said base compartments (B) and a liquid comprising a reduced amount of alkali metal sulfate from said salt compartments (S) is disclosed. The liquid feed to the acid compartments (A) of two- and three-compartment cells may contain H : S0 4 . When more than 5 weight percent H 2 SO 4 is present in the alkali metal sulfate solution to be fed to the acid compartment (A), use of three-compartment water splitting is preferred.

公开(公告)号：EP0124007A3

公开(公告)日：1985-10-30

申请号：EP84104317

申请日：1984-04-17

申请人： ALLIED CORPORATION

发明人： Mani, Krishnamurthy N. ,  Chlanda, Frederick P.

IPC分类号： B01D13/02 ,  C25B01/22 ,  C25B01/16

CPC分类号： B01D61/445 ,  C25B1/16 ,  C25B1/22

摘要： A method for generating an acidified aqueous salt solution and an aqueous base in a multichamber two-compartment electrodialytic water splitter having a unit cell comprised of a bipolar membrane, a first cation permselective membrane and at least one additional (preferably one) substantially non-porous, water-swollen cation permselective or neutral membrane disposed between a cation face of the bipolar membrane and a face of said first cation membrane forming at least two acid compartments and a base compartment positioned between an anode and a cathode, which comprises the steps of: (a) introducing a liquid comprising water to a base compartment formed by an anion face of a bipolar membrane and a face of said first cation membrane; (b) introducing a liquid comprising an aqueous soluble salt to at least one additional acid compartment formed by the faces of said first cation membrane and said at least one additional cation or neutral membrane; (c) serially transferring the liquid comprising the aqueous soluble salt from said additional acid compartment to the first acid compartment formed by a face of said at least one additional cation or neutral membrane and a cation face of a bipolar membrane; (d) passing direct current through said water splitter thereby adding hydrogen ions to the first acid compartment, transferring hydrogen ions through said at least one cation or neutral membrane from the first acid compartment to the said additional acid compartment, metal cations from the acid compartment to the base compartment, and adding hydroxide ions to the liquid comprising water in the base compartment; (e) withdrawing a liquid comprising aqueous base from the base compartment; and (f) withdrawing an acidified aqueous soluble salt from the first acid compartment is disclosed.

公开(公告)号：EP0121611A3

公开(公告)日：1986-12-10

申请号：EP83113236

申请日：1983-12-30

申请人： ALLIED CORPORATION

发明人： Mani, Krishnamurthy N. ,  Chlanda, Frederick P.

IPC分类号： C25B01/26 ,  C25B01/16 ,  C25B01/46 ,  B01D13/02

CPC分类号： C25B1/26 ,  B01D61/445 ,  C25B1/16 ,  C25B1/46

摘要： A three-compartment electrodrolytic water splitter having alternating cation, bipolar, and anion membranes is used to remove alkali metal cations from an aqueous alkali metal chloride solution so as to produce an acidified salt solution. The co-products are a base, such as aqueous NaOH or KOH, and aqueous HCI. The acidified salt solution is then fed to an anode compartment of a membrane or diaphragm electrolytic cell for production of chlorine and alkali metal hydroxide.

公开(公告)号：EP0124007A2

公开(公告)日：1984-11-07

申请号：EP84104317.7

申请日：1984-04-17

申请人： ALLIED CORPORATION

发明人： Mani, Krishnamurthy N. ,  Chlanda, Frederick P.

IPC分类号： B01D13/02 ,  C25B1/22 ,  C25B1/16

CPC分类号： B01D61/445 ,  C25B1/16 ,  C25B1/22

摘要： A method for generating an acidified aqueous salt solution and an aqueous base in a multichamber two-compartment electrodialytic water splitter having a unit cell comprised of a bipolar membrane, a first cation permselective membrane and at least one additional (preferably one) substantially non-porous, water-swollen cation permselective or neutral membrane disposed between a cation face of the bipolar membrane and a face of said first cation membrane forming at least two acid compartments and a base compartment positioned between an anode and a cathode, which comprises the steps of: (a) introducing a liquid comprising water to a base compartment formed by an anion face of a bipolar membrane and a face of said first cation membrane; (b) introducing a liquid comprising an aqueous soluble salt to at least one additional acid compartment formed by the faces of said first cation membrane and said at least one additional cation or neutral membrane; (c) serially transferring the liquid comprising the aqueous soluble salt from said additional acid compartment to the first acid compartment formed by a face of said at least one additional cation or neutral membrane and a cation face of a bipolar membrane; (d) passing direct current through said water splitter thereby adding hydrogen ions to the first acid compartment, transferring hydrogen ions through said at least one cation or neutral membrane from the first acid compartment to the said additional acid compartment, metal cations from the acid compartment to the base compartment, and adding hydroxide ions to the liquid comprising water in the base compartment; (e) withdrawing a liquid comprising aqueous base from the base compartment; and (f) withdrawing an acidified aqueous soluble salt from the first acid compartment is disclosed.

摘要翻译： 一种用于在酸化的水的盐溶液中产生和在具有由双极性膜的单位单元，一个第一阳离子选择性渗透膜和至少一个另外的（优选一个）的多腔室的双隔室电渗析水分裂器到wässrige基基本上无孔的方法 水溶胀阳离子选择性渗透或双极膜的阳离子面和所述第一阳离子膜的形成至少两个酸隔室的面，并在阳极和阴极，其包括的步骤之间定位在底座隔室之间设置中性膜： （a）将液体包含水，以通过在双极性膜和所述第一阳离子膜的面的面阴离子形成的基室; （B）导入的液体，其包括wässrige可溶性盐中的至少一种另外的酸隔室由所述第一阳离子膜和所述的面形成的至少一个额外的阳离子或中性膜; （C）串联传递环的液体包括从所述额外的酸室中的水可溶性盐，以通过面对所述形成的第一隔室的酸的至少一个附加的阳离子或中性膜和一个双极性膜的阳离子面; （D）通过所述水分离器直流由此增加氢离子到所述第一酸隔室，通过所述传送环的氢离子的至少一种阳离子或从第一酸隔室到所述额外的酸室中性膜，从酸室的金属阳离子 到基部隔室，并加入氢氧根离子的液体在底座隔室，其包含水; （E）回抽的液体包括从所述基部隔室含水碱; 和（f）在酸化的水可溶的盐从所述第一隔室的酸是回抽游离缺失光盘。

公开(公告)号：EP0096239A2

公开(公告)日：1983-12-21

申请号：EP83104733.7

申请日：1983-05-13

申请人： ALLIED CORPORATION

发明人： Mani, Krishnamurthy N. ,  Chlanda, Frederick P.

IPC分类号： B01D13/02 ,  D01F13/02 ,  C01D5/00

CPC分类号： C25B1/14 ,  B01D61/445 ,  C25B1/16 ,  C25B1/22 ,  D01F13/02 ,  Y02P70/627

摘要： A process for conversion of alkali metal sulfate such as sodium or potassium sulfate values comprised of spent rayon spin bath liquors Into alkali metal hydroxide and alkali metal sulfate/sulfuric acid by use of two- or three-compartment electrodialytic water splitter cells (120, 220) which comprises (a) feeding a liquid comprising water to the base compartment (B) of a two- or three-compartment cell; (b) feeding liquid comprising at least a portion of alkali metal sulfate values derived from spent rayon spin bath liquors to the acid compartments (A) of the two-compartment cell and to the salt compartments (S) of a three-compartment cell; (c) feeding a liquid comprising another portion of spent rayon spin bath liquors comprised of alkali metal sulfate values to the acid compartments (A) of a three-compartment cell; (d) passing direct current through said cells while maintaining an average temperature in at least the two-compartment cell of at least 40°C; and (e) withdrawing a liquid comprising alkali metal sulfate and sulfuric acid from said acid compartments (A), a liquid comprising alkali metal hydroxide from said base compartments (B) and a liquid comprising a reduced amount of alkali metal sulfate from said salt compartments (S) is disclosed. The liquid feed to the acid compartments (A) of two- and three-compartment cells may contain H : S0 4 . When more than 5 weight percent H 2 SO 4 is present in the alkali metal sulfate solution to be fed to the acid compartment (A), use of three-compartment water splitting is preferred.