摘要:
One embodiment of the present invention provides a process, which includes: electrochemically oxidizing at least one organic compound by bringing the organic compound into contact with an anode, wherein the anode includes: an electrically conductive support; and an electrically conductive, anodically polarized layer on the support; wherein the anodically polarized layer is formed in situ upon the support by precoating; and wherein the organic compound is not phosphonomethyliminodiacetic acid. Another embodiment of the present invention provides a product, produced by the above process.
摘要:
The invention relates to a process for removing small amounts of water and possible further constituents from alkali metal amalgam, wherein the alkali metal amalgam is brought into contact with an element which is insoluble in mercury and catalyzes the reaction of water with the alkali metal amalgam and the possible further constituents to form hydroxides and hydrogen.
摘要:
The invention relates to an electrolysis cell for preparing liquid alkali metal from a liquid alkali metal-heavy metal alloy, which comprises a tube (1) which is arranged essentially horizontally and has a closure device (4) at each of the two ends of the tube (1), at least one solid electrolyte tube (12) arranged in the tube (1), which conducts alkali metal ions and is closed at one end and has an opening (11) at the other end, with the solid electrolyte tube (12) being arranged concentrically in the tube (1) and having the opening (11) facing one end of the tube (1) so that a first annular gap (13) for conducting the liquid alkali metal-heavy metal alloy which forms one anode is present between the inside of the tube (1) and the outside of the solid electrolyte tube (12), an interior space (14) in the solid electrolyte tube (12) for accommodating the liquid alkali metal which can be utilized as cathode, where the closure device (4) comprises an alkali metal-heavy metal alloy inlet (8) or outlet (9) opening into the first annular gap (13), a holder for the solid electrolyte tube (12), an alkali metal outlet (15) connected to the interior space (14) of the solid electrolyte tube (12) and a sealing system for sealing the interior space (14) of the solid electrolyte tube (12) and the alkali metal outlet (15) off from the first annular gap (13), the alkali metal-heavy metal alloy inlet (8) or outlet (9) and from the surroundings of the electrolysis cell.
摘要:
A process for preparing aluminum oxide with a low calcium content, in which(1) crude alpha- and/or gamma-aluminum oxide with a total calcium content in the range from 50 to 2000 ppm, based on the crude alpha- and/or gamma-aluminum oxide, is mixed with an aqueous solution or suspension comprising the compounds selected from the group of inorganic acid, organic acid and complexing agent, (2) the mixture from step (1) is admixed with a flocculating aid, (3) in the mixture of step (2), the solids are separated from the liquid, (4) the solids separated are mixed with water in the presence or in the absence of a flocculating aid, (5) in the mixture of step (4), the solids are separated from the liquid, (6) optionally, steps (4) and (5) are repeated once or more than once, (7) optionally, the solids separated optionally after addition of further compounds, are dried.
摘要:
The present invention relates to mixtures of alkali metal polysulfides and to mixtures of alkali metal polysulfides and alkali metal thiocyanates, to processes for preparation thereof, to the use thereof as heat transfer or heat storage fluids, and to heat transfer or heat storage fluids which comprise the mixtures of alkali metal polysulfides or the mixtures of alkali metal polysulfides and alkali metal thiocyanates.
摘要:
The invention relates to an electrolysis cell comprising an anode compartment which comprises an aqueous solution of at least one alkali metal salt, a cathode compartment and a solid electrolyte which separates the anode compartment and the cathode compartment from one another, wherein that part of the surface of the solid electrolyte which is in contact with the anode compartment and/or that part of the surface of the solid electrolyte which is in contact with the cathode compartment has/have at least one further ion-conducting layer.
摘要:
A process for preparing magnesium compounds by precipitation, in which an aqueous solution or suspension of a magnesium compound is mixed with a precipitant and the corresponding magnesium compound is precipitated wherein the aqueous solution or suspension of a magnesium compound is obtained by reaction of an organomagnesium compound with an aldehyde or a ketone or another electrophile and subsequent aqueous workup of the reaction mixture at a pH of at most 10 or from a magnesium salt with a maximum calcium content and/or potassium content of 200 ppm, based on the magnesium salt used.
摘要:
A method is provide for preparing potassium metal which comprises embedding a polycrystalline alkali metal β″-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.
摘要翻译:提供一种制备金属钾的方法,其包括将多晶碱金属和“Al 2 O 3”模塑物在含有K 2 O:Al 2 O 3摩尔比的钾和铝的氧化粉末中包含在1:(x-1)至1: (x + 1),氧化粉的重量为成型体重量的至少两倍; 以至少100℃/小时的速度将嵌入的模制件加热至至少1100℃; 并进一步加热至至少1300℃,该温度在冷却之前保持至少1小时。
摘要:
A solid polycrystalline potassium ion conductor having a β″-Al2O3 structure, its production, and the preparation of potassium metal using this potassium ion conductor.
摘要:
A process for preparing sodium and aluminum chloride electrochemically is described in which, in an electrolytic cell containing aluminum as an anode and sodium as a cathode which are separated from one another by a sodium ion-conducting solid electrolyte, a fused electrolyte essentially containing sodium tetrachloroaluminate is electrolyzed in the anode compartment, aluminum chloride formed in this process is evaporated from the electrolytic cell and sodium is removed from the cathode compartment.