Abstract: The apparatus serves the purpose of separating trash from less heavy firm articles in a flow of liquid. It has a casing wherein a horizontal revolving screen is located with members which impart motion to trash. Accomodated in the casing coaxially with the revolving screen is a contrivance for the separation, feeding and discharging of trash which is attached to the revolving screen at the end thereof where the flow of liquid carrying the uncleaned firm articles enters the revolving screen. The contrivance consists of an outward cylinder and an inward cylinder. The outward cylinder is provided with ports through which the outflow of liquid and the smaller particles of trash from the revolving screen are fed. Ports provided in the inward cylinder serve to admit the greater particles of trash and discharge all the trash separated. Partitions subdivide the space between the cylinders into passages extending transversely with respect to the longitudinal axis of the contrivance.

Abstract: Reverse osmosis, particularly for water desalination, is achieved using semipermeable membranes which selectively permeate purified water from a feed solution pressurized by reciprocating piston or diaphragm pump. Pump action is assisted by returning pressurized concentrate fluid acting on reverse side of the pump piston or diaphragm. Directional valves controlling alternating admission and venting of concentrate fluid to and from pump cylinder are actuated mechanically by reversal of force applied to the piston rod. Mechanical dwell is provided in the piston or diaphragm motion during directional valve actuation. Pump may be operated by a manual lever or by a crank mechanism on a low speed rotary shaft. An optional differential surge absorber provides continuity of feed solution circulation past membrane surfaces during the return pump stroke, thus minimizing detrimental salt concentration build-up on the membranes.

Abstract: A method is provided for treating diatomaceous earth filteraids having a beer-soluble iron content of less than about 0.01% to further reduce the beer-soluble iron content by maintaining the filteraids in contact with a relatively small volume of an acid. In the filteraids so produced, the beer-soluble iron content can be reduced by as much as 70% to 100%. In making the filteraids of this invention, sulfuric acid in about 0.1 to about 3.0 normal solution can be used to treat the starting filteraids.

Abstract: A treatment facility has a granular media bed for use in acting upon (e.g. filtering) liquid mixtures, such as industrial and municipal water and wastewater, and employs a backwash operation between treatment operations for cleaning or otherwise enhancing the quality of the bed. A control system for the backwash operation establishes a first backwash rate for washing and scouring the granular media to release suspended solids and/or other impurities from the bed. Thereafter the control system establishes a second and generally greater rate for removing the released impurities from the facility. Preferably the first rate is chosen to just completely fluidize the granular bed, at which point a pressure responsive control system detects a constant differential pressure (i.e. a zero change in differential pressure), and the second rate, which generally is greater than the first rate, is responsive to the temperature of the backwash liquid.

Abstract: Treatment plant for treating a fluid formed by waters and sludges and comprising a decanting system; a first centrifuging system for separating, on the one hand, the spent waters and, on the other hand, the sludges formed by organic compounds containing or not heavy metals and the sludges formed by higher-density mineral compounds; an irradiation device for irradiating, by means of an accelerated electron beam for example, the sludges formed by organic compounds and especially those containing heavy metals so as to convert them into mineral compounds which are less toxic and have a high density; a second centrifuging system for subsequently separating and eliminating these mineral compounds.

Abstract: In a column for high pressure liquid chromatography (HPLC) having a tube filled with sorbent for the passage of a solvent medium and samples to be analyzed, and a pressure jacket concentrically surrounding said tube, so that an annular interspace is provided which is filled with the solvent medium fed under pressure and in which the pressure can be equal or higher to the pressure within the internal tube, both ends of the interspace are sealed by means of packings surrounding the internal tube like stuffing boxes, and the ends of the internal tube are provided with perforated stoppers, which extend with a stud-like elongation into the internal tube to the region which is surrounded by the respective packing, so that the elongation support the wall of the internal tube against the sealing pressure of the packings. Accordingly, the internal tube can be a thin-walled glass column or even a hose of flexible plastics.

Abstract: A device for removing and replacing a filter screen in a whirlpool apparatus wherein the filter screen is supported on a ledge in the lower end of the apparatus, the stem of the device both carrying the filter and anchored through an aperture in the hub of the whirlpool apparatus in the usual way and the lower face of the screen being provided with equi-spaced arms, the ends of which terminate in apertures in the skirt of the apparatus to support the screen.

Abstract: A closed filter container containing at least one filter cartridge mounted on a plate, whose periphery is clamped between the lid and rim of said container electrically isolating said cartridge and plate from the walls including the lid of the container as disclosed in applicant Harms' prior U.S. Pat. No. 3,720,322. Mounted between the plate and a wall of the container is at least one electrically conducting resilient finger which maintains electrical contact across the gasket which isolates the plate and cartridges regardless of the flexing of the plate due to variations of pressure inside the container. The plate also is provided with three handle members to facilitate removal of the plate and cartridges from the container. The three handle members also act as legs to stably support the plate and cartridges during replacement of the cartridges. Furthermore, these handles have improved configurations for both ease in handling and strengthening.

Abstract: In a hollow-fiber permeability apparatus in which a permeating region of a housing contains a bundle of hollow fibers, and materials can selectively permeate through the membranes formed by the permeable walls of the hollow fibers, between a fluid flowing along the exteriors of the hollow fibers, and another fluid flowing along the interiors of the hollow fibers, at least one constricted portion directed to the inside of the housing is formed in the sides of the cross-wise cross section of the permeating region, the cross-wise cross-section being substantially perpendicular to the longitudinal direction of the hollow fibers.

Abstract: The apparatus comprises a plurality of tubular classifiers connected in series to one another and into sections which are parallel connected to a manifold to form a unit of the apparatus. Each tubular classifier has pipes for tangential admission of a liquid mixture and the removal of concentrate and filtrate, and vertically extending transverse partitions are provided immediately adjacent to end plates. The partitions have through holes arranged along a spiral line. The holes receive the ends of the tubular filtering elements and said ends are secured therein and the elements are arranged at an angle to the longitudinal axis of a casing and to the partitions.

Abstract: A disposable box filter is provided comprising a box housing in at least two portions and having a fluid chamber with two fluid ports, and a filter element in corrugated sheet form extending across the fluid chamber, held by the housing across the line of flow between the fluid ports, with the corrugations supported in a fixed uniform spacing against differential fluid pressure and fluid flow.

Abstract: A strongly basic anion-exchange resin loaded with iodine and a less than stoichiometric amount of an iodide salt or bromine and a less than stoichiometric amount of bromide salt is an effective demand bactericide for disinfecting water. The bactericidal resin according to the invention elutes only small amounts of halide ions and is especially suited for killing bacteria in feed water supplies having relatively high salt content.

Abstract: The invention provides a fabric-softening composition comprising 1-80% by weight of a quaternary ammonium compound, such as distearyl dimethyl ammonium chloride, and 0.5-25% by weight of a fatty acid choline ester salt. The composition provides for an improved anti-static activity.

Abstract: A process for recovering hydrocarbons from a subterranean hydrocarbon-bearing formation by injecting into the formation via an injection well an aqueous alkaline flooding medium such as water, steam, etc. containing a small amount of a sulfonated, oxyalkylated interfacial tension reducer, forcing the said flooding medium through the formation and recovering hydrocarbons via a production well.

Abstract: Lubricant compositions containing oleagineous materials and, in amounts sufficient to impart thereto resistance to oxidation, wear and metal corrosion, esters of alkylbenzotriazolecarboxylic acid having the formula: ##STR1## where R is selected from the group consisting of alkyl containing from 1 to about 12 carbon atoms, aralkyl containing from 7 to about 12 carbon atoms and cycloalkyl and alkyl-substituted cycloalkyl containing from about 5 to about 12 carbon atoms; and R' is hydrogen or an alkyl group containing from 1 to about 8 carbon atoms.

Abstract: Sorbent particle suitable for use in conjunction with methods and apparatus for pollutant spill control is fabricated from a buoyant, compressible, resilient, oleophillic, hydrophobic, synthetic plastic substrate and a plurality of non-abrasive magnetically susceptible particles imbedded in, and substantially evenly distributed throughout, said substrate.

Abstract: In an electrical device containing a dielectric fluid, the improvement comprising employing as the dielectric fluid a compound of the formula: ##STR1## where X is independently --Cl or --Br; Z is independently ##STR2## R and R' are independently (CH.sub.2).sub.n CH.sub.3 ; and n is an integer of 0 to 10.

Abstract: A body for the storage of heat or for the storage of coolness is, in its solid phase, a conglomerate of a mass of crystalline particles of a salt-hydrate, and a rigid cellular support structure in the form of a crust formed by a chemical reaction with the surfaces of the crystalline particles. By way of example, strontium nitrate is reacted with uniformly sized crystalline particles of sodium sulfate decahydrate to form an integral support crust structure of the compound strontium sulfate, which compound is insoluble in water. When the crystalline particles are transformed to the liquid phase, the liquid is confined within the cells of the support structure. The body is enclosed in a moisture impermeable skin to prevent evaporation of the water of crystallization in the liquid phase.

Abstract: A dry powder detergent composition suitable for machine dishwashing and which contains a low-phosphate content of from about 10 to about 20 weight percent utilizes, as the essential combination of components, an alkali metal tripolyphosphate or an alkali metal hexametaphosphate, an appropriate proportion of an alkali metal carbonate, an alkali metal silicate, and a mixture of a high-foaming nonionic surfactant with a foam reducing agent. The surfactant is preferably liquid and is sorbed on solid constituents of the composition to provide a detergent which exhibits superior performance in hard water notwithstanding the relatively low phosphate content of the composition. The nonionic surfactant mixture preferably further comprises an oil-soluble, nonionic surfactant.

Abstract: A stripper for removing a photoresist mask. The stripper consists essentially, by volume, of about 50-85% tetrachloroethylene and ortho-dichlorobenzene in generally equal amounts, about 15-50% dodecylsulfonic acid, and up to 3% formic acid.

Abstract: The invention relates to stable high solids aqueous dispersions of talc (a natural but relatively hydrophobic complex hydrated magnesium silicate) useful in the preparation of coated paper in place of the currently-used china clay dispersions. The inventive compositions contain at least 60 wt % talc held as a stable dispersion by small quantities of one or more of certain sulphated ethoxylated phenol, or alkylated phenol, salts, optionally together with small amounts of antifoaming air-release agents (such as certain of the known polypropylene glycol-based ethylene oxide/propylene oxide copolymers).

Abstract: A chromogenic compound having the structural formula ##STR1## wherein R.sup.1 and R.sup.2 each represent an alkyl group;R.sup.3 and R.sup.4 each represent a hydrogen atom, a halogen atom, an alkyl group, a nitro group, an amino group, an acyl group, or a carboalkoxy group;R.sup.5 represents a hydrogen atom or an alkyl group, with the proviso that R.sup.5 represents an alkyl group only when R.sup.4 represents a hydrogen atom;R.sup.6 represents an alkyl group, an aryl group or an aralkyl group; andX and Y each represent a hydrogen atom, a halogen atom, a nitro group, a lower alkyl group, an aryl group, an alkoxy group or a carboalkoxy group.The aforesaid compound may be provided in a pressure-sensitive copy system wherein a visible image is formed upon reaction of the above chromogenic compound with an electron-accepting material of the Lewis acid type.

Abstract: A process for forming capsules comprising:(i) forming a solution of wall material and core material in a solvent;(ii) admixing said solution with an immiscible liquid to form a dispersion wherein said solution is the dispersed phase and the immiscible liquid is the continuous phase;(iii) altering the solubility characteristics of the solvent for said solution to effect sequential phase separation of said core and wall materials, respectively, thereby forming capsules of core material encapsulated with wall material; and(iv) recovering said capsules.

Abstract: A method for reactivating carbon beds is provided which is applicable to carbon beds used in purifying industrial wastes such as filtering water recovered from sewage. The method involves first adding either hydrochloric acid or a hydroxide of an alkali metal to the bed containing some of the water. The water and hydrochloric acid or alkali metal hydroxide are thoroughly mixed to distribute the acid or hydroxide throughout the carbon bed. The mixture of acid or hydroxide and water is retained in the carbon bed for sufficient time to reactivate the carbon. Thereafter the acid or hydroxide and water are removed from the carbon bed.

Abstract: There is disclosed a process for the stereoregular polymerization of alpha-olefins or mixtures thereof with ethylene, conducted in the presence of highly active and stereospecific new catalysts. The catalysts are obtained from the reaction of a particular Al-alkyl compound which is at least in part in the form of a complex and/or a substitution reaction product with an ester of an oxygenated organic or inorganic acid, with a supported component characterized by having surface area exceeding certain values or showing a particular X-rays spectrum, and obtained by contacting a Ti halogenated compound, preferably in the form of a complex with an electron-donor compound, with a support comprising a Mg or Mn bihalide in an activated condition.In the catalysts the ratio between the Ti compound, expressed in Ti g-atoms, and the g moles of the ester and the electron-doner compound, when present, is lower than 0.3.

Abstract: A method and composition for dimerization of olefins containing 2 to 4 carbon atoms, wherein at least one of said olefins is mixed, in a medium of hydrocarbon or halogenated hydrocarbon solvents at a temperature ranging from 0.degree. to 100.degree. C. under a pressure of from 1 to 40 atm with a two-component catalyst consisting of:(1) a complex of a nickel salt with a tertiary phosphine or tertiary phosphite;(2) an organoaluminum compound comprising a natural or synthetic carbochain rubber, swellable in said solvents, containing 2 to 50 mol. % of AlRX units, wherein R is an alkyl with at most 8 carbon atoms, X is a halogen; atomic ratio Al/Ni being varied within the range of from 1 to 100.The catalyst employed in the method according to the present invention features high stability (retaining its original activity for a long time); it is not crushed and can be readily regenerated.

Abstract: Sensitizing solutions for rendering surfaces receptive to the deposition of adherent electroless metal comprising a precious metal and a stoichiometric excess of a Group IV metal which is capable of two valence states are stabilized against precious metal separation by adding a Lewis Base, e.g., hydroquinone or hydroxylamine. Processes for rendering surfaces receptive to the deposition of an electroless metal are also provided in which there are employed the stabilized sensitizing solutions.

Abstract: A composition useful in hydrocarbon conversion processes such as catalytic cracking is disclosed, comprising 0.05 to 10 weight percent lanthanum associated with a refractory support. The composition may also include 0.02 to 10 weight percent iron.

Abstract: A highly active metal catalyst is prepared by producing a coating of an alloy on a supporting surface, the alloy containing a catalytic metal such as nickel or platinum and a second metal such as aluminum or iron which is capable of forming a volatile compound, reacting the coating with a material forming a volatile compound with the second metal, and volatilizing the compound, which leaves the supporting surface with a coating of the catalytic metal in a highly active condition.

Abstract: A method of improving the physical characteristics of a conductor paste includes the step of adding ZnO in an amount sufficient to achieve about 1% to 3%, by weight, of the total. Where the conductor paste is adapted to be fired at 850.degree. C., ZnO is added in an amount sufficient to achieve about 2% of the total, and where the conductor paste is adapted to be fired at 985.degree. C., ZnO is added in an amount sufficient to achieve about 3% of the total. Several conductor pastes, based on different conductive metal systems and including ZnO, exhibit unusual and surprisingly beneficial results.

Abstract: A process for preparing polymer resins of high impact resistance which comprises coagulating a latex of a rubbery polymer grafted or not with at least one ethylenic monomer in the presence of a suspension stabilizer and a coagulating agent to make a stable aqueous suspension of coagulated particles of said rubbery polymer, adding at least one ethylenic monomer to the aqueous suspension and subjecting the resultant mixture to suspension polymerization.

Abstract: There is disclosed an aqueous cationic electrocoating bath adapted to electrodeposit films at the cathode which cure to provide enhanced corrosion protection in which the bath contains an amine-functional resin dispersed therein with the aid of a solubilizing acid together with a polyamine-chromic acid ionic polymer formed by reacting a water insoluble polyamine with from about 50 to about 95 equivalent percent of a chromic acid. The ionic polymer is used in an amount to supply from about 25 to about 1000 parts of detectable chromate per million of said bath.

Abstract: A paint composition which can be applied from a spray can yet which can be cleaned with water. The composition comprises a water-soluble, neutralized resin film former contained in a water-soluble solvent, but has a maximum water content of 10 weight percent. Formulations can be provided to obtain coatings ranging from flat to high gloss.

Abstract: A radiation-sensitive composition comprising a radiation-sensitive polymer which has in its molecule a plurality of epoxy groups and a plurality of bromine atoms, and at least one stabilizer which is selected from the group consisting of compounds having stable free radicals, polymerization inhibitors, ketone-amine reaction products, and phenol derivatives. Even when the composition is preserved for a long term, the characteristics do not change.

Abstract: This invention relates to improved blend compositions of a neutralized sulfonated elastomeric polymer and a non-polar backbone process oil which is either paraffinic or naphthenic and has less than 0.75 wt. % of polar type compounds and less than 20 wt. % of aromatic type. These oil extended sulfonated elastomeric products have improved compression set properties as compared to previously existing products.

Abstract: Polyamides flameproofed with red phosphorous and including cadmium oxide as an additive to retard the formation of phosphine during heating are disclosed. The polyamides are particularly useful in the manufacture of electrical components.

Abstract: A composition which is curable to a flame retardant, pigmented silicone rubber. The composition consists essentially of a polydiorganosiloxane convertible to the solid elastic state, a reinforcing silica filler, an organic peroxide curing agent, platinum and a pyrazolone pigment. Such pigments have the advantage of not substantially reducing the flame retardant properties of the rubber.

Abstract: Low abrasion, heat resistant, high strength friction material with a high resistance to wear is described as containing phenolic resin, an organic modifier, processed mineral fibers and a filler. Rubber, either natural or synthetic, graphite, a metallic oxide, a color pigment, and factice may also be present. The material finds particular use in friction materials for brake blocks, drum brake linings and disc pads for vehicle braking systems and the like.

Abstract: Solid, homogeneous, particulate, highly-filled polyolefin composites which comprise(a) about 10-75% by weight of polyolefin having an inherent viscosity of at least about 2, and(b) about 25-90% by weight of finely-divided, inorganic filler compound having catalytically-active transition metal compound interacted at its surface,said polyolefin being polymerized onto the surface of said filler, and said composite having a 10-second micronization homogeneity of at least about 50% and a micronization homogeneity index of at least about 20. Methods of preparing these composites and methods of forming objects having outstanding properties from these composites are described.

Abstract: Antifouling compositions or paints with a high degree of stability and toxic to marine life comprising the combination of (a) cuprous oxide; (b) one or more triorganotin polymer or copolymer carboxylates and (c) at least one relatively inert dehydrating agent of low water solubility which is capable of taking up water either physically or chemically; and optionally also comprising other toxic or non-toxic resin or pigment components, non-aqueous diluents, thinners, extenders or solvents, together with other conventional additives.The component (c) is preferably a relatively inert metal salt of low water solubility, e.g. calcium sulphate in anhydrous or hemi-hydrate form and the polymer or copolymer is generally a substituted or unsubstituted vinyl or acrylic triorganotin polymer or copolymer carboxylate, copolymers being preferred to give the desired choice of physical or mechanical properties.

Abstract: Stabilization system consisting of a triarylphosphite of the general formula ##STR1## wherein R.sub.1 represents tert.-butyl, 1,1-dimethylpropyl, cyclohexyl or phenyl, and one ofR.sub.2 and R.sub.3 is hydrogen and the other is hydrogen, methyl, tert.-butyl, 1,1-dimethylpropyl, cyclohexyl or phenyl,and a phenolic antioxidant, for stabilizing polyolefins.

Abstract: The invention relates to multiheterocyclic compounds which have been found to be effective ultraviolet stabilizers. The invention also relates to ultraviolet degradable organic compositions containing a stabilizing amount of the multiheterocyclic composition to prevent such degradation. These stabilizers are effective in the presence of other additives commonly employed in polymeric compositions including, for example, pigments, colorants, fillers, reinforcing agents and the like. These ultraviolet stabilizers may also be incorporated into the organic compositions in the polymer melt or dissolved in the polymer dope, coated on the exterior of the molded article, film or extruded fiber.

Abstract: Combination of a polyolefin; a crosslinking agent; a halogenated phosphorous-nitrogen compound having the formula ##STR1## where R' is selected from the group consisting of hydrogen and alkyl radicals having 1 to 3 carbon atoms, R is a cyano alkyl radical having 2 to 6 carbon atoms and X is chlorine, bromine, or iodine; ammonium polyphosphate; and hexachlorocyclopentadiene dimer yields a composition which is strong, fire-retardant and also strongly adherent to certain surfaces including aluminum.

Abstract: A composition and method are disclosed in which a homopolymeric isocyanate such as a toluene diisocyanate polymer is formed IN SITU within a polyurethane composition containing a hydroxy-terminated organic compound, preferably a polybutadiene, an amount of self-polymerizable polyisocyanate in excess of the stoichiometric requirement, and a polymerization catalyst therefor. The composition can be fully cured on a surface and yet provides an excess of stable material, i.e. dormant isocyanate containing groups which are reactive on demand to strengthen interfaces with adjacent layers containing available hydroxyl groups, such as a layer of solid polyurethane-based propellant, without the need for intermediate reactive coatings.

Abstract: The present disclosure relates to dipeptide derivatives. These novel compounds are useful as elastase inhibitors.

Abstract: Cyclic analog of bradykinin having the formula ##STR1## where Lys-L-lysine residue, Pro-L-proline residue, Gly-glycine residue, Phe-L-phenylalanine residue, Arg-L-arginine residue. The present compound can create prolonged depressor effect in experiments in vivo, as well as increase vascular permeability in experiment in situ less than bradykinin. In experiments in vitro this compound displays no myotropic effect.

Abstract: This invention relates to a class of water-soluble acid azo dyes, containing at least a sulphonic group, having formula (I): ##STR1## wherein the symbols have the following meanings: A is a residue of a diazotizable aromatic or heterocyclic amine, optionally substituted;R is selected from the group consisting of H, CH.sub.3, OCH.sub.3 and OC.sub.2 H.sub.5 ;R.sub.1 is selected from the group consisting of CH.sub.3 and C.sub.2 H.sub.5 ;R.sub.2 is selected from the group consisting of CH.sub.3 and C.sub.2 H.sub.5.The dyes which are the object of the present invention exhibit shades varying from yellow to blue and are useful for dyeing and printing natural polyamide fibres (wool and silk) and synthetic fibres (nylon). They possess an excellent affinity in both an acid bath and a neutral bath and an excellent tinting power. The dyes obtained are characterized by a remarkable purity of shade, by an excellent stability to sunlight, to washing and to sweat, as well as by a good equalizing power on nylon.

Abstract: A pigment coating composition for paper and process for the production of the coating composition by cooking a specially-treated starch product and mixing with clay, wherein the specially-treated starch is characterized as a substantially non-birefringent cold-water swelling, granular starch product.

Abstract: A compound effective in the treatment of diabetic angiopathy, i.e. a selective .beta.-receptor blocker has the formula ##STR1## wherein: R.sup.2 is a hydrogen or alkyl having one to five carbon atoms, R.sup.3 is alkyl having one to five carbon atoms, cycloalkyl or phenyl optionally substituted with hydroxyl or phenyl, or R.sup.2 and R.sup.3 together form a five- to eight-membered ring optionally containing also other heteroatoms and/or fused with an other ring, preferably phenyl, naphthyl, quinolyl, isoquinolyl, pyridyl, pyrazolyl, R.sup.5 is hydrogen or alkyl having one to four carbon atoms, cycloalkyl or phenyl optionally substituted with halogen, alkoxy having one to four carbon atoms or alkyl having one to four carbon atoms, R.sup.6 is hydrogen, alkyl having one to four carbon atoms or phenyl, m=0, 1 or 2, and n=0, 1 or 2.

Abstract: A process for preparing azetidinones of the formulae 1 and 2A and the stereoisomers of the latter of formula 2B ##STR1## wherein R is an amino-protecting group commonly used in penicillin chemistry and is selected from the group consisting of H, C.sub.1 -C.sub.6 alkyl, phenyl, (optionally substituted in the o-, m-, or p- positions by CH.sub.3, F, Cl, OCH.sub.3, or a nitro group), benzyl, 2-thienylmethyl, tetrazol (1-, 2-, or 5-)-ylmethyl, 2-phenyl-5-methylisoxazol-4-yl, phenoxymethyl, and R.sup.5 O-- and R.sup.5 S, wherein R.sup.5 stands for C.sub.1 -C.sub.6 alkyl, phenyl, benzyl or trichloroethyl; it should be noted that the value of R is immaterial to the process described;X is selected from the group consisting of H, SCl, SBr, Cl, Br, and OH. In the case where X is OH the group RCX.dbd.N-- is better represented as the amide, RCONH--, group;RCX.dbd.N may also represent the phthalimido, succinimido-, or tritylamino- group;R.sup.