公开(公告)号：GB2421238A

公开(公告)日：2006-06-21

申请号：GB0427574

申请日：2004-12-16

Applicant: BASF AG

Inventor： SCHIERLE-ARNDT KERSTIN ,  HUBER GUNTHER ,  HEAVENS STEPHEN NICHOLAS ,  BLACKBURN JOHN STUART ,  JONES IVOR WYNN

IPC: C01F7/04 ,  C04B35/113 ,  C04B35/119 ,  C25C3/02

Abstract: A solid polycrystalline potassium ion conductor having a b ''-Al2O3 structure is obtainable by means of ion exchange of the alkali metal ions of a polycrystalline alkali metal b ''-Al2O3 moulding, in which the alkali metal ions are sodium ions or a mixture of sodium and potassium ions and the molar ratio M2O (M = alkali metal) to Al2O3 is 1: x, x being an integer or non-integer number within the range 5 to 11, for potassium ions, the ion exchange being effected by a method wherein neither chloride-containing nor liquid potassium Ion sources are used, the method comprising the steps of: embedding the polycrystalline alkali metal b ''-Al2O3 moulding in an oxidic powder containing potassium and aluminium of a molar K2O: Al2O3 ratio within the range of 1: (x-1) to 1: (x+1), the weight of oxidic powder amounting to at least two times the weight of the moulding; heating the embedded moulding at a rate of at least 100{C per hour to at least 1100{C; and further heating to at least 1300{C, this temperature being maintained for at least one hour prior to cooling. Potassium metal may be obtained, starting from potassium amalgam, by electrolysis using an anode containing potassium amalgam, liquid potassium metal as a cathode and this solid potassium ion conductor as a membrane separating cathode and anode spaces.

公开(公告)号：CA2529202A1

公开(公告)日：2006-06-16

申请号：CA2529202

申请日：2005-12-07

Applicant: BASF AG

Inventor： SCHIERLE-ARNDT KERSTIN ,  BLACKBURN JOHN STUART ,  HEAVENS STEPHEN NICHOLAS ,  HUBER GUENTHER ,  JONES IVOR WYNN

IPC: C25B11/04 ,  C04B35/113 ,  C04B35/119 ,  C25B1/14 ,  C25B1/18 ,  C25B1/26 ,  C25C3/02

Abstract: A solid polycrystalline potassium ion conductor having a .beta."-Al2O3 structure is obtain- able by means of ion exchange of the alkali metal ions of a polycrystalline alkali metal .beta."-Al2O3 moulding, in which the alkali metal ions are sodium ions or a mixture of sodium and potassium ions and the molar ratio M2O (M = alkali metal) to Al2O 3 is 1 : x, x being an integer or non-integer number within the range 5 to 11, for potassi um ions, the ion exchange being effected by a method wherein neither chloride-containing nor liquid potassium ion sources are used, the method comprising the steps of: embedding the polycrystalline alkali metal .beta."-Al2O3 moulding in an oxid ic powder containing potassium and aluminium of a molar K2O : Al2O3 ratio within the range of 1 : (x- 1) to 1 : (x+1), the weight of oxidic powder amounting to at least two times the weight of the moulding; heating the embedded moulding at a rate of at least 100.degree.C per hour to at least 1100.degree.C; and further heating to at least 1300.degree.C, this temperature being maintained for at least one hour prior to cooling. Potassium metal is obtained, starting from potassium amalgam, by electrolysi s using an anode containing potassium amalgam, liquid potassium metal as a cathode a nd this solid potassium ion conductor as a membrane separating cathode and anode spaces.

公开(公告)号：CA2529202C

公开(公告)日：2013-02-19

申请号：CA2529202

申请日：2005-12-07

Applicant: BASF AG

Inventor： SCHIERLE-ARNDT KERSTIN ,  HUBER GUENTHER ,  HEAVENS STEPHEN NICHOLAS ,  BLACKBURN JOHN STUART ,  JONES IVOR WYNN

IPC: C25B11/04 ,  C04B35/113 ,  C04B35/119 ,  C25B1/14 ,  C25B1/18 ,  C25B1/26 ,  C25C3/02

Abstract: A solid polycrystalline potassium ion conductor having a .beta."-Al2O3 structure is obtain- able by means of ion exchange of the alkali metal ions of a polycrystalline alkali metal .beta."-Al2O3 moulding, in which the alkali metal ions are sodium ions or a mixture of sodium and potassium ions and the molar ratio M2O (M = alkali metal) to Al2O3 is 1 : x, x being an integer or non-integer number within the range 5 to 11, for potassium ions, the ion exchange being effected by a method wherein neither chloride-containing nor liquid potassium ion sources are used, the method comprising the steps of: embedding the polycrystalline alkali metal .beta."-Al2O3 moulding in an oxidic powder containing potassium and aluminium of a molar K2O : Al2O3 ratio within the range of 1 : (x- 1) to 1 : (x+1), the weight of oxidic powder amounting to at least two times the weight of the moulding; heating the embedded moulding at a rate of at least 100°C per hour to at least 1100°C; and further heating to at least 1300°C, this temperature being maintained for at least one hour prior to cooling. Potassium metal is obtained, starting from potassium amalgam, by electrolysis using an anode containing potassium amalgam, liquid potassium metal as a cathode and this solid potassium ion conductor as a membrane separating cathode and anode spaces.