Abstract: A process for the secondary treatment of wastewater by a modified air activated sludge system comprising aerating wastewater containing bacteria until the BOD level of the wastewater is reduced by at least 90%, the food to microorganism ratio of the wastewater being greater than one, introducing the aerated wastewater under pressure to a flotation cell to separate suspended solids including bacteria from the pressurized wastewater by dissolved air flotation clarification, recycling said suspended soilds and bacteria to said aeration step in an amount sufficient to maintain said food to microorganism ratio and removing and disposing of the remaining reduced BOD level wastewater.

Abstract: A molded part containing plastic substrate and a firmly adherent coating thereon, the plastic substrate containing a filler therein present at least in part in proximity to the surface of the substrate. The coating is transferred from the mold surface to the substrate during the molding operation and during solidification of the molded part. The molded part has a smooth surface as molded and without any subsequent finishing thereof.

Abstract: Cellulose is activated by penetration of the cellulose with a polar medium and mixed at a temperature at which no significant degradation occurs with an amide selected from the group consisting of dimethylacetamide, 1-methyl-2-pyrrolidinone and mixtures thereof and from 3 to 15% by weight of lithium chloride. The cellulose is then dissolved in the amide and lithium chloride in the substantial absence of any polar medium other than the amide. Shaped cellulosic products may be formed by reconstituting the cellulose in fiber, sheet or other form.

Abstract: A molded plastic part having a plastic substrate and a firmly adherent coating thereon. The molded part is produced from a reactive plastic molding material as the substrate by coating the surface of a mold, prior to molding the part, with a coating composition containing a reaction promoter for the reactive plastic molding material, introducing the reactive plastic molding material into a mold, molding the part and removing the part from the mold.

Abstract: A controlled release glass is based on phosphorus pentoxide as the glass forming oxide and an alkali metal oxide as the principal glass modifier. The glass contains a modifying oxide of a material to be released slowly, e.g. one of the oxides of the alkali metal, or an oxide of an alkaline earth metal, an oxide of a metal of Group IIIA of the Periodic Table or a transition metal oxide, depending on the deficiency to be cured.

Abstract: A reaction injection molding process for producing a coated polyurethane part in which a liquid mixture of polyurethane reactants is injected into a mold where it is reacted and molded into a shaped part at elevated temperatures. The surface of the mold is coated, prior to molding, with a coating composition containing a polyurethane catalyst. The catalyst acts to bond the coating composition to the molded part so that the shaped part upon removal from the mold contains a firmly adherent coating of the coating composition.

Abstract: A corrosion inhibiting material comprises a water soluble zinc oxide/phosphorus pentoxide/alumina glass which, when in contact with water, releases ions which inhibit corrosion of adjacent metal surfaces. Advantageously the glass is finely ground and then dispersed in a resin carrier to form a paint. The glass composition is preferably 54.6 to 63.3 mol % zinc oxide, 35.8 to 45.3 mol % phosphorus pentoxide; the remainder at least 0.1 mol % aluminum oxide.

Abstract: A food product containing microfibrillated cellulose is prepared by mixing together an edible liquid which swells cellulose, a food additive and fibrous cellulose to form a liquid suspension. The suspension is repeatedly passed through a small diameter orifice in which the mixture is subjected to a pressure drop of at least 3000 psig and a high velocity shearing action followed by a high velocity decelerating impact. The process converts the cellulose into microfibrillated cellulose and forms a stable homogeneous suspension of the microfibrillated cellulose, liquid and food additive.

Abstract: A glass composition for effecting crosslinking of a polycarboxylic acid cement and cement compositions formed therefrom. The glass is of the aluminoborate type and comprises 40 to 75 mole % boric oxide, not more than 60 mole % zinc oxide, not more than 50 mole % calcium oxide and not more than 20 mole % alumina. Cements formed from the glasses have a wide range of applications including structural cements, dental filler and orthopaedic cements.

Abstract: Corrosion resistant coatings are applied to metal tubing while substantially continuously moving the metal tubing through a series of stations. The process comprises the sequential steps of flowing by gravity a zinc-rich thermosetting coating suspended in a volatile carrier onto the tubing, the viscosity of the coating composition being such that it flows around and completely covers the external surface of the tubing, removing excess coating by means of an air blower arranged circumferentially around the tubing and sequentially heating the coated tubing first to volatize off the carrier and then more rapidly to crosslink the thermosetting coating composition.

Abstract: A spreader for distributing particulate material, particularly adapted for use as both a package for particulates and as a disposable spreader, comprises a dispenser, a pair of wheels mounted at opposite ends of the dispenser and a handle for advancing the spreader along a given path as the dispenser rotates. The dispenser has inner and outer chambers, the inner chamber adapted to act as a reservoir for particulate material, the outer chamber adapted to provide a circumferential passageway for particulate material passing from the inner chamber to the exterior of the spreader. A one-way valve arrangement in the passageway restricts particulate flow to the exterior when the dispenser is rotated in one direction but permits flow when rotated in the opposite direction.

Abstract: A metal electroplating rack coated with an insulating coating. The extremities of the rack has tips which are uncoated to provide electrical contact for a part being plated. The portion of the rack adjacent the tips has at least one opening through the rack, the opening being coated with an insulating coating such that a continuous coating is formed with the coating on opposite surfaces of the rack so as to prevent loss of adhesion of the insulating coating at the tip.

Abstract: A reaction injection molding process for producing a coated polyurethane part in which a liquid mixture of polyurethane reactants is injected into a mold where it is reacted and molded into a shaped part at elevated temperatures. The surface of the mold is coated, prior to molding, with a coating composition containing a polyurethane catalyst. The catalyst acts to bond the coating composition to the molded part so that the shaped part upon removal from the mold contains a firmly adherent coating of the coating composition.

Abstract: A free-flowing granular fertilizer composition and a process for its preparation in which the granules comprise expanded, substantially oil-free coffee grounds as a carrier coated and impregnated with a urea-formaldehyde condensation product. The condensation product has from 1 to 3 moles of urea for each mole of formaldehyde and the composition has at least 15% of the total nitrogen in cold water insoluble form.

Abstract: A glass composition for effecting crosslinking of a polycarboxylic acid cement and cement compositions formed therefrom. The glass is of the aluminoborate type and comprises 40 to 75 mole % boric oxide, not more than 60 mole % zinc oxide, not more than 50 mole % calcium oxide and not more than 20 mole % alumina. Cements formed from the glasses have a wide range of applications including structural cements, dental filler and orthopaedic cements.

Abstract: A thermally and dimensionally stable structural foam plastic product having a cellular core and an integral solid skin on the surface thereof. The structural foam product is produced by injection molding and comprises a thermoplastic resin and from 1 to 30% by volume of flake mica as a filler.

Abstract: A process for the removal of sulfur dioxide and other contaminants and the recovery of ammonium sulfate as a by-product from a hot waste gas stream comprising cooling the waste gas stream to a temperature below 120.degree. F., passing said waste gas stream in sequence through at least two separate absorption zones utilizing as an absorbent a recirculated aqueous salt solution of ammonium sulfite-bisulfite, withdrawing and oxidizing a portion of said aqueous ammonium sulfite-bisulfite salt solution under pressures and temperatures sufficient to substantially convert the salts to sulfate salts, and recycling the ammonia and sulfur dioxide vapors liberated during oxidation to the first absorption zone.

Abstract: The mixing time required to develop yeast leavened dough compositions is reduced by incorporating in the dough composition prior to mixing from 0.001 to 0.015 parts by weight of sorbic acid or a sodium, potassium or calcium salt of sorbic acid, for each 100 parts by weight of flour. The reduced mixing time is achieved without adverse effect on the quality of the baked product and without significant reduction in tolerance to overmixing by the dough composition.

Abstract: A luminaire for illuminating a surface area spaced from the luminaire nadir to a distance from its elevated mounting. The luminaire has an elongated light source with its axis substantially parallel to the surface being illuminated. A specular reflector disperses the light over a range from substantially the light nadir to a line about 73.degree. from the nadir. With the present construction, a series of beams, each of about 1.degree. in angular extent, is approximated to provide uniform light distribution over a designated angular spread with sharp cutoffs beyond the spread with a high utilization factor for the light generated. The reflector is configured to prevent reflected light from passing through the light source although beams of at least one section are directed in paths closely adjacent to the light source.

Abstract: An anti-corrosion paint composition includes a glass material based on a silica type glass and containing zinc and phosphate ions which are leached into an aqueous solution.