Abstract: Alumina dust, particularly partially calcined alumina dust, is coarsened by forming an aqueous admixture or slurry comprising the alumina dust and finely divided calcium carbonate and introducing the resulting aqueous admixture or slurry into Bayer pregnant liquor and precipitating alumina trihydrate from the resulting Bayer pregnant liquor.

Abstract: A rotary drum assembly includes separate agglomerating and hardening drums that are rotated independently of each other. The agglomerating drum has a generally cylindrical configuration with an inner cylindrical wall. A scraper is rotatably positioned within the agglomerating drum in spaced relation to the inner cylindrical wall with its axis spaced from the axis of the drum. The scraper has a tubular body portion with a plurality of parallel rows of blades extending radially therefrom. Each of the rows extends lengthwise along substantially the entire length of the scaper body portion and follow a helical path having a single turn about the axis of the tubular body portion. The rows of blades thus make a single convolution about the scraper body portion. Drive means are provided to synchronously rotate the agglomerating drum and scraper with the scraper arranged to rotate at a preselected and different speed relative to the speed of the drum.

Abstract: Pelleted sulfur compositions consisting essentially of particles of sulfur which include a substantial proportion of carbon-disulfide-insoluble sulfur particles together with a binder consisting essentially of a plasticizing or softening oil containing an anionic or nonionic surfactant in an amount equivalent to between 0.5 and 10% of the weight of the pelleted composition, the pelleted composition containing an amount of the plasticizing oil equivalent to between 10 and 60% of its weight. The pelleted composition is free-flowing, storable, and disperses homogeneously when distributed in rubber mixtures by milling on heated compounding rolls.

Abstract: A strategically located series of spaced apart classifiers set at varying depths within a pelletizer pan operated to classify the forming pellets and also impart controlled energy into the forming pellets producing pellets of improved quality. Controlled classifying of the forming pellets stabilizes pellet output. With a stabilized pellet output obtained the need for driving the pellet pan with a variable speed device can be eliminated since pan rotation can be maintained at a constant speed.

Abstract: An apparatus for applying glue to chips, fibers and the like of wood, bagasse and other cellulose containing substances, which comprises a substantially cylindrical mixing chamber in which a shaft rotates equipped with radially extending mixing and/or glue applying tools. These tools immerse with their head region partly into a ring of chip material rotating at a relatively high speed. The glue applying tools comprises a glue conveying passage which in the lower region of the glue applying tools communicates with a glue feeding conduit associated with the driving shaft and in its upper region has a glue exit opening. The upper section of the glue applying tool has a glue discharge passage extending in a direction opposite to the direction of rotation of the glue applying tool. The end region of the glue discharge passage has at least one glue discharge opening.

Abstract: Abrasion resistant sodium perborate monohydrate is prepared by treating sodium perborate monohydrate with at least 5% of water at a temperature of 20.degree. - 90.degree. C. in a moistening unit and then drying at a temperature beginning at 40.degree. C. and increasing to a maximum of 90.degree. C.

Abstract: The agglomerating drum has a generally cylindrical configuration with an inner cylindrical wall. A scraper is rotatably positioned within the agglomerating drum in spaced relation to the inner cylindrical wall with its axis spaced from the axis of the drum. The scraper has a tubular body portion with a plurality of parallel rows of blades extending radially therefrom. Each of the rows extends lengthwise along substantially the entire length of the scraper body portion and follow a helical path having a single turn about the axis of the tubular body portion. Agglomerative material is introduced into the rotating agglomerating drum and forms a layer of agglomerative material on the drum inner cylindrical wall. The scraper is rotated in the same direction as the direction of rotation of the agglomerating drum and at a preselected synchronous speed with the agglomerating drum.

Abstract: This application is directed to processes involving the use of nonmiscible inert liquid carriers such as halogenated hydrocarbons. The processes are applicable to mixing, agglomerating, coating, dyeing, reorientating, crystallizing, precipitating, reacting and similar types of operations. Examples of products which can be treated by these processes are foods, pharmaceuticals, detergents, fabrics and papers. The inert carrier acts as an expanded matrix to support and disperse such products to facilitate carrying out the indicated operating steps.

Abstract: Strong, stable, free-flowing agglomerates of sodium carbonate peroxide are produced by contacting rotary agitated sodium carbonate peroxide with an aqueous agglomerating solution having a viscosity of at least 30 centipoise and containing less than 20% by weight agglomerating agent.

Abstract: Sodium perborate having an active oxygen content of about 11.0 to 12.0 weight percent and a bulk density of about 0.40 to 0.70 g./cc. is made by a process comprising (1) agglomerating conventional sodium perborate tetrahydrate with hydrogen peroxide to form spherical particles and (2) drying the resulting particles at a temperature below 45.degree.C.

Abstract: Granular calcium hypochlorite particles having a core of calcium hypochlorite encapsulated in a plurality of layers of calcium hypochlorite are produced from an aqueous slurry of calcium hypochlorite by spraying a pumpable and sprayable slurry of calcium hypochlorite particles onto suspended particles of solid calcium hypochlorite above a moving bed of said particles in a fluidized bed. The solid particles coated with the slurry are heated to simultaneously evaporate and remove water from the slurry whereby said particles are coated with a layer of solid calcium hypochlorite.A portion of the moving bed of coated particles is removed from the spraying zone and further processed, if desired. In one embodiment, the coated particles with or without sizing are further dried to produce granular particles having the desired moisture content.

Abstract: A method and an apparatus for producing agglomerated powders such as coffee powder, coffee substitutes such as chicory and other highly hygroscopic and thermoplastic powders in which powder is made to fall down against a central area of a rotating disc. The powder is moistened during the fall against the disc by the supply of steam or finely atomized water across the central area of the disc at such a distance above the same that practically all the powder is moistened before it hits the disc.

Abstract: Granular built laundry detergent compositions comprising smectite-type clay materials and prepared by specified processes.

Abstract: A method is disclosed for the agglomeration of chlorocyanurates. The method involves contacting said chlorocyanurates with salts that are non-reactive with it. The chlorocyanurate particles so treated have an increased storage stability and a significantly decreased tendency to segregate when ultimately mixed with a detergent base.

Abstract: A method of manufacturing a granular detergent by spray drying a slurry of cleaning materials, which comprises: wetting the surfaces of the granules of detergent formed by spray drying; coating the thus wetted surfaces with 0.02 - 4 parts by weight of powdery builders per 1 part by weight of the granules of detergent; and drying it thereafter.

Abstract: Inner and outer cylinders are mounted for rotation about a common horizontal axis. Powder is fed into one end of the inner cylinder to produce granules by coagulation as the cylinder rotates. The inner cylinder is open at the other end to provide an outlet for the granules, and has a perforated (mesh) wall portion towards its outlet end through which uncoagulated powder falls into the outer cylinder. The diameter of the latter increases towards the inlet end of the inner cylinder so that the uncoagulated powder travels back down the surface of the outer cylinder as it rotates. On reaching the end thereof adjacent the inlet end of the inner cylinder, the powder is lifted by scoops on the inner surface of the outer cylinder to fall into an open-topped duct by which powder is fed into the inner cylinder.

Abstract: A granular composition is comprised of primary carrier particles that are mixed with a liquid containing an active ingredient which saturates, by adsorption, the surface of each particle. A second carrier material is then mixed in so that secondary carrier particles adhere to the surface of each primary particle to form an agglomerate. The secondary carrier adsorbs additional liquid in the composition so that the composition may be handled as a granular mass.