Abstract: Disclosed herein is a process for making a particulate (oxy)hydroxide, carbonate, or oxide of TM which includes nickel and at least one metal selected from the group consisting of cobalt, manganese, and aluminum. The process includes providing an aqueous solution (?1) containing a water-soluble salt of Ni, one of an aqueous solution (?2) containing a water-soluble salt of Co, an aqueous solution (?3) containing a water-soluble salt of Mn, or an aqueous solution (?4) containing a water-soluble compound of Al, an aqueous solution (?) containing an alkali metal hydroxide or carbonate and, optionally, an aqueous solution (?) containing ammonia or an organic acid or its alkali metal salt, combining solution (?1) and solution (?) and at least one of solutions (?2), (?3), (?4), and, if applicable, solution (?), in different locations of a continuous reactor, and removing the particles from the liquid by a solid-liquid separation method.

Abstract: The invention relates to a process for purifying crude 4,4?-dichlorodiphenyl sulfone comprising: (a) dissolving the crude 4,4?-dichlorodiphenyl sulfone which may contain water in an organic solvent in which 4,4?-dichlorodiphenyl sulfone has a solubility of 0.5 to 20% at 20° C. and optionally adding water to obtain a solution which comprises 4,4?-dichlorodiphenyl sulfone, the organic solvent and 1 to 30 wt % water based on the amount of 4,4?-dichlorodiphenyl sulfone and water; (b) cooling the solution to a temperature below the saturation point of 4,4?-dichlorodiphenyl sulfone to obtain a suspension comprising crystallized 4,4?-dichlorodiphenyl sulfone; (c) carrying out a solid-liquid separation to obtain residual moisture containing 4,4?-dichlorodiphenyl sulfone and a mother liquor; (d) washing the residual moisture containing 4,4?-dichlorodiphenyl sulfone with an organic solvent in which 4,4?-dichlorodiphenyl sulfone has a solubility of 0.5 to 20% at 20° C.

Abstract: The invention relates to a process for obtaining 4,4?-dichlorodiphenyl sulfone from an organic mixture comprising 4,4?-dichlorodiphenyl sulfone and a linear C6 to C10 carboxylic acid as organic solvent, comprising: (a) cooling the organic mixture by (a1a) mixing the organic mixture with water in a crystallization vessel to obtain a liquid mixture; (a1b) cooling the liquid mixture obtained in (a1a) to a temperature below the saturation point of 4,4?-dichlorodiphenyl sulfone by (i) reducing the pressure in the crystallization vessel to a pressure at which the water starts to evaporate, (ii) condensing the evaporated water by cooling, (iii) mixing the condensed water into the liquid mixture in the crystallization vessel, to obtain a suspension comprising crystallized 4,4?-dichlorodiphenyl sulfone; or by (a2) bringing the organic mixture into contact with at least one coolable surface and thereby reducing the temperature in the organic mixture with a cooling rate in the range from 5 to 50 K/h until a temperature

Abstract: The present invention is a protective spark cover for covering the exterior face of a filter for use with a respirator or the like. During metal welding, smelting and cutting operations and similar activities creating sparks, splatter and the like, exposed respirator filters may be perforated and made unusable. The present invention protective spark cover provides a removable cover to protect such filter elements from welding and spark damage and other similar mechanical damage. The invention is essentially a screen cover to protect the filter element and a frame to hold the screen in place over the filter.

Abstract: The present invention is a protective spark cover for covering the exterior face of a filter for use with a respirator or the like. During metal welding, smelting and cutting operations and similar activities creating sparks, splatter and the like, exposed respirator filters may be perforated and made unusable. The present invention protective spark cover provides a removable cover to protect such filter elements from welding and spark damage and other similar mechanical damage. The invention is essentially a screen cover to protect the filter element and a frame to hold the screen in place over the filter.

Abstract: A novel filtration device having a substantially rigid frame comprised of an outer peripheral band connected by a plurality of spacers to an inner breather tube, wherein filter pads are secured over both sides of the frame and separated by the spacers to form an enclosed central air pocket accessible only through the breather tube. The breather tube is adapted to be detachably connected to an inlet port in a respirator face mask so as to provide a closed channel for air flow from the central air pocket to the interior of the face mask.

Abstract: A process for fabricating a multi-blade tool out of high strength tool steel and the tool fabricated therewith. The present invention is distinguished by the following steps. Initially, a profile, the cross section of which corresponds to the cross section of the to-be-fabricated multi-blade tool, is made by hot extrusion. Then, the profile is twisted at a temperature higher than room temperature, however, below the departure temperature of the extruded profile, via a plurality of roller units.

Abstract: A novel filtration device having a substantially rigid frame comprised of an outer peripheral band connected by a plurality of spacers to an inner breather tube, wherein filter pads are secured over both sides of the frame and separated by the spacers to form an enclosed central air pocket accessible only through the breather tube. The breather tube is adapted to be detachably connected to an inlet port in a respirator face mask so as to provide a closed channel for air flow from the central air pocket to the interior of the face mask.

Abstract: The invention relates to a process for the preparation of highly antibacterially active enantiomerically pure 1,8-bridged 4-quinolone-3-carboxylic acids and derivatives of the formula (I) ##STR1## in which 1) a compound of the formula ##STR2## is reacted with a compound of the formula ##STR3## to form a compound of the formula ##STR4## followed by cyclization to form a compound of the formula ##STR5## and further cyclization to form a compound of the formula ##STR6## an finally reaction of the cyclized product with amines of the formula ##STR7##