Siemens Aktiengesellschaft

Laurent Danneels

Jacky Vanhumbeeck

Wolfgang Pernegger

Johan Helder

Jan Kuypers

James Piolon

Hubert De Steur

Guido Heyneman

Luc Boone

Frank Vangaever

Christian Vandenbossche

Luc Demaegd

An analysis system for determining total copper content in waste-water, as from a galvanizing system, comprises periodically taking samples from such waste-water, acidifying such samples with a metalliferous acid containing a metal which forms a strong cyanogen complex and which exhibits a larger electro-negative potential than copper, such as Pd, reducing cupric ions to cuprous ions, adjusting the pH of the resulting sample solution, adding a copper color-forming reagent, such as bathocuprione disulfonic acid salt, and determining the color content by colorimetry. In order to determine a reagent value, a prepared waste-water sample can be subjected to colorimetry before and after addition of the color-forming reagent.

Analysis system for determining copper content in waste water

An additive-free, fast-precipitating electrolyte bath for precipitating lustrous, crack-free palladium layers on workpieces is formulated, by successively adding to distilled water heated up to about 90.degree. C., phosphoric acid, sufficient ammonia to neutralize the phosphoric acid and palladium, in the form of palladium chloride. After dissolution of the palladium salt, the operating pH value is adjusted by additions of ammonia or phosphoric acid as required and the volume of the bath can be increased as desired by additions of further distilled water. The bath can be filtered prior to use.

Additive-free, fast precipitating palladium electrolyte bath and process

An automated analysis process and apparatus for analyzing the amount of dispersed water-immiscible solid organic substances in sewage water whereby a precise sample of sewage is taken from a sewage source, admixed with various reagent solutions, including a K.sub.2 Cr.sub.2 O.sub.7 --solution under heat-time conditions so that a reaction occurs between the sewage and the reagent and all of the organic substance in the sample are oxidized while simultaneously at least some Cr.sup.+6 --ions are reduced to Cr.sup.+3 --ions. During this oxidation-reduction reaction and at a location remote therefrom, a precise amount of Fe.sup.+2 --ions is generated within an aqueous acidic Fe.sup.+3 --ion containing solution via a coulometric reduction process. Thereafter, the reacted sewage-reagent solution is admixed and reacted with the so-generated Fe.sup.+2, Fe.sup.+3 --ion containing solution so that any residual Cr.sup.+6 --ions in the sewage-reagent solution are reduced to Cr.sup.+3 --ions and at least some Fe.sup.+2 --ions remain. By biamperometrically titrating the resultant Fe.sup.+2 --ion containing solution with a standardized Cr.sup.+6 -- ion containing solution, the precise amount of Fe.sup.+2 --ions within the titrated solution is determined and this provides an indirect indication of the amount of organic substances within the sewage sample. Pneumatic, hydraulic and electrical circuits actuate the various steps and are themselves actuated and controlled by a master control means, such as preprogrammed computer means, which also computationally integrates data from the overall process and automatically determines the amount of organic substances in the samples under analysis.

Process for the determination of the content of solid, dissolved and

This invention relates to an electroplating device for partially plating a series of items moving along a path at a constant level, the device including at least one electroplating bath positioned along the path having end walls with slots therein through which the items to be plated may pass, and an end wall configuration adjacent the slot which combines with a circulation pump to maintain a constant liquid level in the bath above the bottom of the slot.

Electroplating device for partially plating items in transit

An electroplating device for partial plating of items in continuous transit through a plating bath. The bath includes an enclosure having slots for movement of the articles to be plated lengthwise of the bath. A cross flow of treatment liquid is maintained in the constant level bath through the provision of flow directing vanes, the flow being provided by a treatment liquid circulation pump.

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Varsenare, Belgium

Laurent Danneels