Other

Firma C. Conradty

C. Conradty Nurnberg Gmbh & Co Kg

Messrs. C. Conradty

Konrad Koziol

Dieter Zollner

Karl-Heinz Sieberer

Hans-Carl Rathjen

Gerhard Thiele

Christine Zollner

Baptist Zenk

Christine Zollner Nee Moller

Friedrich Rittmann

Petar Husnjak

Franz Schieber

Nada Lenac-Lukacevic

Frane Paro

Peter Walser

A valve metal anode, for electrolytical processes, having an electron-active covering layer, is prepared by anchoring electron-activating substances, counteracting passivation of the anode, in a sintered porous carrier layer of valve metal. The carrier layer which is sintered onto the cleaned valve metal base may consist of a powder of the same metal or of the crystallographically similar metal. The infusion of the active substances into the carrier layer can be accomplished by impregnating and drying or baking the active substances, by precipitating them from the vapor phase, galvanically, or from the gaseous phase. The active substances may also be ingredients of the sinter mixture.

Metal anode for electrochemical processing and method of making same

A coated valve metal electrode for electrochemical processes, which has (a) an electrode base body of valve metal; (b) a base layer on said valve metal, said base layer comprising an electrically conducting element without valve effect, and (c) a cover layer comprising titanium dioxide and/or tantalum oxide with certain doping and stable oxides.

Electrode for electrochemical processes

An anode for electrochemical processes comprises a basis metal and a new electrochemical active substance for the cover layer, which substance is thallium palladate having the formula TlPd.sub.3 O.sub.4.

Metal anode for electrochemical processes

A protective cover layer is provided for the basis metal of an electrolytic anode, particularly for anodes used in the production of chlorine and caustic soda. The cover layer comprises a non-stoichiometric compound having the empirical formula:

Metal anode for electro-chemical processes

The anode is particularly designed for use at anodic densities D.sub.A greater than 10 kA/m.sup.2, and comprises substantially horizontally extending coated anode segments having a clear spacing of at least 1.5 mm from each other and upwardly extending lateral surfaces. Each segment has an active coated part higher than 5 mm and not exceeding 20 mm, measured from the horizontal undersurface of the anode. The actual active surface of the parts, up to heights of 5 mm, 7.5 mm, 10 mm and 15 mm, respectively, exceeds at least 2.5, 3.33, 4 and 4.7 times, respectively, the projected anode area which latter is the total area bounded by the periphery of the anode. At least half the actual active surface extends upwardly relative to the horizontal base area of the anode.

Coated titanium anode for amalgam heavy duty cells

A metal electrode with an active cover layer for electrochemical purposes which cover layer includes metal platinates, metal palladates, or the like, and metal palladates and comprises, as embedding substances compounds of the type Ba (M.sub.x Ti.sub.1.sub.-x)O.sub.3 where M is a platinum metal. The latter may be used alone or in combination with other additives and does not impair on the one hand the effectiveness of the active materials and is on the other hand, when exposed to an electrolytic bath, location in chemically resistant without showing complete inactivity and, thus, increase the current yield of the anode.

Metal electrode with an active cover layer for electrochemical purposes

Preparation and use of a new electrochemical active substance for the cover layer of metal anodes, which substance is thallium palladate and is obtained as a cardinal-red compound, which is cubic-face-centered, sufficiently characterized in pure crystalline form and, thus, constitutes a new electrochemical active substance for the cover layer of metal anodes.

Preparation and use of thallium palladate as cover layer of metal anodes

A metal anode for electrochemical processes, particularly for electrolytic processes, is provided with a metal resistant to the electrolysis medium and with an active cover layer applied thereon and comprising crystalline structures of the type Me.sub.A (I).sub.approx. 0.4 Me.sub.B (I).sub.approx. 0.1 Pt.sub.3 O.sub.4, with Me.sub.A representing Li, Na, K, and Me.sub.B representing Tl and Ag.

An electrode for electrochemical processes, particularly for the electrolysis processes for manufacturing chlorine, consisting of a metal resistant to the electrolysis medium and of an active cover layer applied thereon and containing the substances causing the electrode process, which substances are compounds of the type

Electrode for electrochemical process

A method of making special cokes according to which a mixture of from 50-90% by weight of an atmospheric distillation residue of a petroleum, e.g. a Pannonian petroleum, with a density of from 0.935-0.965 grams per cubic centimeter, a viscosity of from 2.8.degree.-4.3.degree. Engler at 100.degree.C, a sulfur content of from 0.85-1.10%, a coke value according to Conradson of from 5-7 %, an aromatics content of from 40-60%, an asphalt content below 1.8% with a boiling component of less than 20% within the temperature range of from 250.degree.-350.degree.C, and a content in ash forming elements of less than 0.05% is coked together with from 10-50% by weight of a catalyst-free catalytic residue obtained by catalytic cracking of a distillate low in ashes, e.g. gas oil, which last mentioned residue has a density of from 0.90-0.95 grams per cubic centimeter, a viscosity of from 2.5.degree.-3.2.degree. Engler at 50.degree.C, a sulfur content less than 0.6%, a coke value according to Conradson of from 3.5-4.5%, an aromatics content of more than 35%, an asphalt content of less than 0.6%, and boiling components of from 8 to 12% for the range of from 250.degree.-300.degree.C and from 30-40% within the temperature range of from 300.degree.-350.degree.C in a 24 to 48 hour cycle at temperatures of from 475.degree.-515.degree.C and at a pressure of from 3-7 atmospheres above atmospheric pressure at a high recycling ratio.

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Rothenbach an der Pegnitz, Germany

Konrad Koziol