摘要:
An anode material comprising a solid solution of lithium metal and lithium nitride can be used in lithium-based electrochemical cells. The anode material can incorporate lithium alloys, carbon and polymeric materials.
摘要:
The present invention relates to a method of preparing hydroxylamine in an electrochemical cell, comprising the steps of: providing an electrochemical cell comprising an anode, a cathode, a bipolar membrane positioned between the anode and the cathode, the bipolar membrane having an anion selective side facing the anode and a cation selective side facing the cathode, and a divider positioned between the bipolar membrane and the anode, thereby defining a feed compartment on the cation selective side of the bipolar membrane, a recovery compartment on the anion selective side of the bipolar membrane, and an anolyte compartment between the divider and the anode; charging the feed compartment with an acidic electrolyte and the recovery and anolyte compartments with a solution; introducing nitrogen containing gas into the feed compartment; passing a current through the electrochemical cell thereby producing hydroxylammonium salt in the feed compartment; transferring at least a portion of the hydroxylammonium salt from the feed compartment to the recovery compartment thereby producing hydroxylamine in the recovery compartment; and recovering hydroxylamine from the recovery compartment.
摘要:
A process is described for preparing organic and inorganic hydroxides or alkoxides, or ammonia or organic amines from the corresponding salts in an electrolysis cell which comprises an anolyte compartment containing an anode and an electrolyte solution, a catholyte compartment containing a cathode, and an intermediate compartment containing a liquid wherein said intermediate compartment is separated from the catholyte compartment by an anion selective membrane and from the anolyte compartment by a cation selective membrane, said process comprising the steps of:(A) charging to the catholyte compartment, a mixture comprising an organic or inorganic salt or an amine salt, and a liquid selected from water or organic liquids provided that sufficient water is present in the catholyte mixture to form the desired hydroxide or amine, or sufficient alcohol is present in the catholyte mixture to form the desired alkoxide;(B) passing a current through the electrolysis cell to produce the desired hydroxide, alkoxide or amine in the catholyte compartment and an acid in the intermediate compartment;(D) recovering the organic or inorganic hydroxide or alkoxide or the amine from the catholyte compartment; and(E) recovering the acid from the intermediate compartment.The organic and inorganic hydroxides and alkoxides, or amines prepared by the process of the invention are characterized by improved purity, and production costs are lower than many other processes. The processes of the invention also are particularly useful for preparing higher molecular weight quaternary and tertiary ammonium hydroxides and alkoxides.
摘要:
In one embodiment, the invention relates to a process for purifying solutions containing a hydroxide compound, including the steps of: (A) providing an electrochemical cell containing an anode, a cathode, a cation selective membrane and a bipolar membrane, the bipolar membrane having an anion selective side facing the anode and a cation selective side facing the cathode, wherein the cation selective membrane is positioned between the anode and the bipolar membrane, and the bipolar membrane is positioned between the cation selective membrane and the cathode, thereby defining a feed compartment between the cation selective membrane and the anode, a recovery compartment between the bipolar membrane and the cation selective membrane, and a water compartment between the bipolar membrane and the cathode; (B) charging a solution of an ionic compound at a first concentration to the water compartment, and water to the recovery compartment; (C) charging a solution containing the hydroxide compound at a second concentration to the feed compartment; (D) passing a current through the electrochemical cell to produce the hydroxide compound at a third concentration in the recovery compartment; and (E) recovering the hydroxide compound from the recovery compartment.
摘要:
In one embodiment, the invention relates to a process for purifying solutions containing a hydroxide compound, including the steps of: (A) providing an electrochemical cell containing an anode, a cathode, a cation selective membrane and an anion selective membrane, wherein the cation selective membrane is positioned between the cathode and the anion selective membrane, and the anion selective membrane is positioned between the cation selective membrane and the anode, thereby defining a feed compartment between the cation selective membrane and the anion selective membrane, a recovery compartment between the cathode and the cation selective membrane, and a water compartment between the anion selective membrane and the anode; (B) charging a solution of an ionic compound at a first concentration to the water compartment, and water to the recovery compartment; (C) charging a solution of the hydroxide compound at a second concentration to the feed compartment; (D) passing a current through the cell to produce the hydroxide compound at a third concentration in the recovery compartment; and (E) recovering hydroxide compound from the recovery compartment.
摘要:
A process is described for preparing metal borohydrides and onion borohydrides in an electrolysis cell which comprises an anolyte compartment containing an anode and a catholyte compartment containing a cathode, the anolyte and catholyte compartments being separated from each other by a cation exchange membrane which is effective at a pH below 7, said process comprising(A) charging an anolyte comprising an aqueous solution of at least one acid to the anolyte compartment;(B) charging a catholyte comprising an aqueous solutiuon prepared from a metal boron oxide or an organic onium boron oxide to the catholyte compartment;(C) passing a current through the electrolysis cell to produce the metal borohydride or an organic inium borohydride in the catholyte compartment; and(D) removing at least a portion of the catholyte from the catholyte compartment.In one preferred embodiment, quaternary ammonium borohydrides are prepared utilizing quaternary ammonium boron oxides in the aqueous catholyte and inorganic acids such as sulfuric acid in the anolyte solution.
摘要:
A process is described for preparing quaternary ammonium hydroxides of improved purity. In one embodiment, the present invention relates to a process of preparing quaternary ammonium hydroxides from the corresponding quaternary ammonium salts in an electrolytic cell which comprises an anolyte compartment containing an anode and a catholyte compartment containing a cathode and water, said anolyte and catholyte compartments being separated from each other by a cation-exchange membrane, said process comprising the steps of(a) providing the catholyte compartment with a cathode of zinc, cadmium, tin, lead, or alloys thereof, mercury, or mercury amalgam,(b) charging an aqueous solution containing a quaternary ammonium salt to the anolyte compartment,(c) passing a current through the electrolytic cell to produce quaternary ammonium hydroxide in the catholyte compartment, and(d) recovering the quaternary ammonium hydroxide from the catholyte compartment.
摘要:
Processes are described for preparing organic and inorganic hydroxides or alkoxides and for improving the purity of organic and inorganic hydroxides or alkoxides utilizing an electrolysis cell. For example, a process for improving the purity of an organic or inorganic hydroxide is described, and the process comprises the steps of:(A) providing an electrolysis cell which comprises an anolyte compartment containing an anode, a catholyte compartment containing a cathode and water, and at least one intermediate compartment containing water, an organic liquid, or a mixture of water and an organic liquid, said at least one intermediate compartment being separated from the anolyte and catholyte compartments by at least two dividers selected from nonionic dividers, cation selective membranes, or combinations thereof;(B) charging a mixture comprising the organic or inorganic hydroxide and an oxidizable liquid to the anolyte compartment;(C) passing a current through the electrolysis cell to produce a purified organic or inorganic hydroxide in the catholyte compartment; and(D) recovering the purified organic or inorganic hydroxide from the catholyte compartment.The process of the invention is effective in lowering the content of anions such as halide, nitrite, nitrate, carbonate, etc., some cations such as zinc, calcium, etc., and neutral organic materials such as methanol, amines, etc.
摘要:
An electrolytic process for making hydroxides or alkoxides from the corresponding halide salts in a divided cell where the desired compounds are formed in the catholyte while the accumulation of halogen in the anolyte is effectively prevented throught the action of a reducing agent added to the acidic anolyte.
摘要:
A process for treating solutions of quaternary ammonium hydroxide containing latent halide to lower the latent halide content of the solution comprises the steps of(A) providing an electrolytic cell comprising an anode and a cathode wherein the cathode comprises zinc, cadmium, tin, lead, copper or titanium or alloys thereof, mercury or mercury amalgam,(B) charging a solution containing at least one quaternary ammonium hydroxide which contains latent halide into the electrolytic cell,(C) passing a current through the electrolytic cell to lower the latent halide content in the solution, and(D) recoverying the quaternary ammonium hydroxide solution from the electrolytic cell.