An ammonia chemical species desorption process desorbs ammonia chemical species adsorbed onto a Prussian blue derivative more simply at lower cost under milder conditions as compared with using an aqueous solution of a salt or strong acid, and only water. This ammonia chemical species desorption process includes an ammonia chemical desorption step of bringing carbon dioxide and water into contact with a Prussian blue derivative represented by the following general formula (1), thereby desorbing an ammonia chemical species.

A.sub.xM[M′(CN).sub.6].sub.y.zH.sub.2O  (1)

where x is 0 to 3, y is 0.1 to 1.5, z is 0 to 6, A is at least one cation of hydrogen, ammonium, an alkaline metal, and an alkaline earth metal, and M and M′ are each independently at least one cation of at least one of atoms having atomic numbers 3 to 83 except for ammonium, an alkali metal, and an alkaline earth metal.

A system, method, and articles of manufacture for a surface-modified transition metal cyanide coordination compound (TMCCC) composition, an improved electrode including the composition, and a manufacturing method for the composition according to Formula III—An electrochemical cell including a system having an anode, a cathode, and an electrolyte wherein the anode includes a material, including the material including at least one composition represented by Formula III: A.sub.xMn.sub.y[Mn(CN).sub.(6)].sub.z(Vac).sub.(1-z).n(H.sub.2O)m(Che) wherein, in Formula III, A includes one or more alkali metals including Na; and wherein 0<j≤4, 0≤k≤0.1, 1.2<x≤4, 0<y≤1, 0.8<z≤1, 0<n≤4; 0≤m≤0.2 and wherein x+2y−4z=0.

A system, method, and articles of manufacture for a surface-modified transition metal cyanide coordination compound (TMCCC) composition, an improved electrode including the composition, and a manufacturing method for the composition according to Formula III—An electrochemical cell including a system having an anode, a cathode, and an electrolyte wherein the anode includes a material, including the material including at least one composition represented by Formula III: A.sub.xMn.sub.y[Mn(CN).sub.(6)].sub.z(Vac).sub.(1-z).n(H.sub.2O)m(Che) wherein, in Formula III, A includes one or more alkali metals including Na; and wherein 0<j≤4, 0≤k≤0.1, 1.2<x≤4, 0<y≤1, 0.8<z≤1, 0<n≤4; 0≤m≤0.2 and wherein x+2y−4z=0.

The present invention relates to a process for preparing a double metal cyanide catalyst (DMC) comprising the reaction of an aqueous solution of a cyanide-free metal salt, an aqueous solution of a metal cyanide salt, an organic complex ligand and a complex-forming component, to form a dispersion, wherein the reaction is effected using a mixing nozzle and wherein the process temperature of the dispersion during the reaction is between 26° C. and 49° C. The subject matter of the invention further encompasses double metal cyanide catalysts (DMC) obtained in accordance with the process according to the invention and also the use of the DMC catalysts for the preparation of polyoxyalkylene polyols.

A desalination method that may be used to reduce limescale buildup in desalination electrodes. The desalination method includes providing an electrode including a first material having at least one compound of a formula before a desalination step. The formula is A.sub.xFe.sub.yCu.sub.z(CN).sub.6, where A is Na, Li or K, 0.1≤x≤2, 1≤y, and z≤2. The desalination method further includes exchanging A in A.sub.xFe.sub.yCu.sub.z(CN).sub.6 with Ca to form a second material from the first material during the desalination step.

A desalination method that may be used to reduce limescale buildup in desalination electrodes. The desalination method includes providing an electrode including a first material having at least one compound of a formula before a desalination step. The formula is A.sub.xFe.sub.yCu.sub.z(CN).sub.6, where A is Na, Li or K, 0.1≤x≤2, 1≤y, and z≤2. The desalination method further includes exchanging A in A.sub.xFe.sub.yCu.sub.z(CN).sub.6 with Ca to form a second material from the first material during the desalination step.

The present disclosure provides a prussian blue analogue positive electrode material, a preparation method therefor and an electrochemical energy storage device. A molecular formula of the prussian blue analogue positive electrode material is A.sub.xM.sub.c[M′(CN).sub.6].sub.1-y(b-H.sub.2O).sub.6y-dL.sub.d.□.sub.y.(i-H.sub.2O).sub.z, where, A is one or more selected from a group consisting of alkali metal cation, alkaline-earth metal cation, Zn.sup.2+ and Al.sup.3+; M is a metal with the valence of 2+ or 3+; M′ is a metal with the valence of 2+ or 3+; b-H.sub.2O is a coordinated water; □ is a M′(CN).sub.6 cavity; L is a neutral ligand, the neutral ligand is one or more selected from a group consisting of CH.sub.3CN, NH.sub.3, CO and C.sub.5H.sub.5N; i-H.sub.2O is an interstitial water; 0<x≤2; 0<c≤1; 0<y<1; 0<d≤6y; 0≤z≤16. In the prussian blue analogue positive electrode material of the present disclosure, the neutral ligand L participates in the coordination with a transition metal and substitutes the coordinated water partly or wholly, so that a content of the coordinated water is decreased or even eliminated, therefore, the water absorption performance of the prussian blue analogue positive electrode material will be decreased significantly, in turn the performance of the electrochemical energy storage device is significantly improved.

The present disclosure provides a prussian blue analogue positive electrode material, a preparation method therefor and an electrochemical energy storage device. A molecular formula of the prussian blue analogue positive electrode material is A.sub.xM.sub.c[M′(CN).sub.6].sub.1-y(b-H.sub.2O).sub.6y-dL.sub.d.□.sub.y.(i-H.sub.2O).sub.z, where, A is one or more selected from a group consisting of alkali metal cation, alkaline-earth metal cation, Zn.sup.2+ and Al.sup.3+; M is a metal with the valence of 2+ or 3+; M′ is a metal with the valence of 2+ or 3+; b-H.sub.2O is a coordinated water; □ is a M′(CN).sub.6 cavity; L is a neutral ligand, the neutral ligand is one or more selected from a group consisting of CH.sub.3CN, NH.sub.3, CO and C.sub.5H.sub.5N; i-H.sub.2O is an interstitial water; 0<x≤2; 0<c≤1; 0<y<1; 0<d≤6y; 0≤z≤16. In the prussian blue analogue positive electrode material of the present disclosure, the neutral ligand L participates in the coordination with a transition metal and substitutes the coordinated water partly or wholly, so that a content of the coordinated water is decreased or even eliminated, therefore, the water absorption performance of the prussian blue analogue positive electrode material will be decreased significantly, in turn the performance of the electrochemical energy storage device is significantly improved.

A desalination cell including an electrode including a material having at least one compound of the following formula: A.sub.xM.sup.I.sub.yM.sup.II.sub.z(CN).sub.6, where A is Na, Li or K, 0≤x≤2, M.sup.I is a first metal, M.sup.II is a second metal, 1≤y, and z≤2. The material is configured to reduce calcium carbonate formation and/or carbon dioxide gas formation during operation of the desalination cell. The first metal may be Fe, Mn, Co, Sc, Ti, Cr or Zn. The second metal is Fe, Mn, Co, Sc, Ti, Cr or Zn. The first metal may be different than the second metal.

The present invention relates to a process for preparing a double metal cyanide catalyst (DMC) comprising the reaction of an aqueous solution of a cyanide-free metal salt, an aqueous solution of a metal cyanide salt, an organic complex ligand and a complex-forming component, to form a dispersion, wherein the reaction is effected using a mixing nozzle and wherein the process temperature of the dispersion during the reaction is between 26° C. and 49° C. The subject matter of the invention further encompasses double metal cyanide catalysts (DMC) obtainable in accordance with the process according to the invention and also the use of the DMC catalysts for the preparation of polyoxyalkylene polyols.