摘要:
A method is provide for preparing potassium metal which comprises embedding a polycrystalline alkali metal β″-Al2O3 molding in an oxidic powder containing potassium and aluminum 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 molding; heating the embedded molding 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β“-Al 2 O 3成型体在含有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 method and apparatus for the electrolysis of an aqueous solution containing alkali metal ions, for example, the electrolysis of brine to produce chlorine and caustic. In one embodiment, a composite membrane comprising at least an ionconductive polymer and a metal permeable to alkali metal is used in an electrolytic cell. An illustration of such a polymer is a perfluorocarbon polymer containing sulfonic acid or sulfonate groups, in intimate contact with a layer of mercury. Another aspect is the use of elevated pressures or other techniques substantially to eliminate the presence of normally gaseous products from the electrolyte. For example, high pressures may be employed to dissolve chlorine in a brine electrolyte and/or liquefy it. In another aspect, sodium sulfate is electrolyzed in a cell comprising a composite membrane, a foraminous anode, and a diaphragm between the composite membrane and anode; the oxygen produced is withdrawn through the anode.
摘要:
A METHOD OF DECOMPOSING AN ALKALI METAL AMALGAM BY CONTACTING IT WITH WATER AND GRAPHITE BALLS HAVING A PORTION OF THEIR SURFACE COATED WITH AN UNDERLYING FERROUS METAL AND AN OVERLYING NON-FERROUS, AMALGAM-RESISTANT METAL. THE DECOMPOSITION REACTION PRODUCES HYDROGEN, AN ALKALI METAL HYDROXIDE WITH A CONCENTRATION ABOVE 50% BY WEIGHT, AND MERCURY IN WHICH THE SODIUM CONTENT IS REDUCED TO LESS THAN 0.01 PERCENT.
摘要:
A VERTICAL ALKALI-METAL AMALGAM DENUDER HAVING A RESILIENT HOLDING-DOWN PLATE TO PREVENT ATTRITION OF THE GRAPHITE PACKING. THE HOLDING-DOWN PLATE IS PREFERABLY IN THE FORM OF A RESILIENT BED OF MATERIAL (C.G. WIRE MESH) HAVING A THICKNESS OF AT LEAST ONE INCH.
摘要:
The invention relates to a device for breaking the electrical continuity of the stream of caustic soda produced in mercury-cathode chlor-alkali plants. The device is comprised of a vessel internally subdivided into three compartments by two flow-conveying septa, the three compartments being in communication and defining a caustic soda tortuous flow-path allowing the centrifugal deposition of mercury microdroplets released by the upstream amalgam decomposer.