Vereinigte Aluminium-werke Aktiengesellschaft

Vaw Aluminium Ag

Hydro Aluminum Rolled Products Gmbh

Vereinigte Aluminium-werke Atkiengesellschaft

Hydro Aluminium Deutschland Gmbh

Gerhard Kudermann

Karl-Heinz Blaufuss

Neil Brown

Oliver Seiferth

Manfred Fuchs

In a method for recovering lubricant or lubricant concentrate from a used mixture containing lubricant, the mixture containing lubricant and which is substantially dewatered is subjected to short path distillation at a temperature of at least 150&#xb0; C. and a pressure of less than 1.5 mbar, in order to obtain a lubricant concentrate which can be recycled into cooling lubricants and which is free of very finely wear debris, metal soaps and polymers.

Recovery of lubricants from used cooling lubricants

Disclosed is a method for increasing the molar ratio of aluminum to chlorine in a polyaluminum chloride solution by the electrochemical dissolving of aluminum, including contacting a polyaluminum chloride solution having a molar ratio of aluminum to chlorine of equal to or greater than 0.5 with a galvanic element. The galvanic element includes metallic aluminum and an electrochemically more noble metal. Contact is maintained until the aluminum to chlorine ratio is increased to the desired level.

Method for increasing the molar ratio of aluminum to chlorine in

The present invention is directed to a method for removing organic substances from aluminate liquors of the Bayer process. The method comprises the steps of contacting the liquor with an oxygen containing gas under elevated pressure in the presence of metallic ions acting as a catalyst to oxidize the organic substances, precipitating the metallic ions jointly with aluminum hydroxide, separating the precipitate from the oxidized liquor and recycling the precipitated aluminum hydroxide containing the metallic ions into the oxidation step as a catalyst carrier.

Method for removing organic substances from caustic aluminate liquors

Disclosed is a high temperature magnetic stirrer including a permanent magnet positioned underneath a frame supported platform. The magnet is positioned to be rotatable in a plane parallel to the platform. A spiral shaped heating element mounted to the frame is positioned above the platform and centered above the rotatable magnet. The spiral has a diameter sufficient to enclose a portion of a crucible. Means are provided to supply the heating element with electricity, and additional means are secured to the frame to rotate the magnet.

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Alfter, Germany

Gerhard Kudermann