Abstract: The invention relates to a method and device for the washing of a medium consistency fibrous slurry, especially a chemical pulp slurry in which the slurry is fed at an inclined angle onto a substantially horizontal portion of circulating filter belt, and then distributed over substantially the entire working width of the filter belt. The distributed slurry is then washed with a washing liquid under localized pressure to produce a slurry having a medium consistency range, i.e., about 8 to 15 percent. In order to increase the consistency to 20 to 40 weight percent, preferably about 30 to about 35 weight percent, the washed slurry is passed to a pressing zone.

Abstract: A method for the removal of rust deposits from the interior walls of fluid conduits comprising the steps of preparing a shaped compound consisting of iron oxides and manganese oxides as primary elements, at least one oxide of Cu, Ni, Cr, Zn, Co, Mg, Ti, V, Sn, Ba, Y and Gd as secondary elements and at least one silica oxide, silicate salt, aluminum oxide and aluminum salt as a binding element. When chlorine containing water is contacted with the compounds, the water is activated to dissolve iron rust scales which have adhered to the interior of the pipe walls thereby facilitating removal while providing a protective coating onto the pipe walls.

Abstract: A method of cleaning window furnishings while located in their place of use, in which the furnishings are pushed together to form a vertically hanging block and a wetting medium is circulated from above. A cleaning washing medium is thereafter circulated from above, followed by a rinsing liquid also from above and over the window furnishings. The furnishings are then dried, and surplus fluids are collected at a base of the furnishings. All procedures are carried out while the window furnishings are hanging vertically in their locations of normal use. The wetting medium, washing medium and the rinsing liquid flow downward due to gravity with uniform velocity and cover the furnishings uniformly.

Abstract: A process for the preparation of a superconductor of the type AB.sub.2 Cu.sub.3 O.sub.7-x, wherein A is a mixture of rare earths, B is an alkaline earth metal and x is less than one, comprising the treatment of xenotime to obtain a rare earths oxide therefrom and mixing the oxide with an alkaline earth metal compound and a copper compound and heat treating the mixture to obtain the superconductor. The treatment of the xenotime comprising melting the xenotime with a 1:1 mixture of Na.sub.3 CO.sub.3 and K.sub.2 CO.sub.3, dissolving a solid obtained therefrom in HCl, treating the resulting solution with NH.sub.4 OH to precipitate the rare earths, dissolving the precipitate in HCl, treating the resulting solution with H.sub.2 C.sub.2 O.sub.4 to precipitate the rare earths aned calcinating the precipitate to obtain a rare earths oxide.