Abstract: A toxic-monitoring material for the detecting and monitoring of toxic fluids placed in contact with or exposed to the monitoring material, which material comprises a solid, microporous, transparent, polymeric, matrix material having interconnecting micropores filled with a liquid composition, the liquid composition comprising a solvent for the toxic component to be detected and a reactant which reacts with the toxic component, whereby a toxic component dissolves in the solvent within the micropores and reacts with the reactant, to produce a change in color or appearance throughout the depth of the material, so that the detecting and monitoring of the toxic fluid may be determined.

Abstract: By using centrifugal force, foaming liquids are degassed and the amount of certain liquid components determined by analyzing exiting gas. Liquid fed to a rapidly rotating beaker is spread as a thin film while gas is forced out without foaming. This film is pressed to the beaker bottom and out through holes to the inside of a casing from where it runs out for collection. Air is blown into the beaker, whose interior is divided by a baffle. A minor amount of air exits through an annular gap between the baffle plate and the beaker wall, and a major amount through a blow-out tube. Volatile airborne liquid components are then analyzed.

Abstract: A continuous process for the alkylation of an alkylatable hydrocarbon with an alkylating agent in the presence of an acid-type catalyst, including; contacting an alkylatable hydrocarbon with an alkylating agent in the presence of an acid-type catalyst at a temperature and pressure and for a time sufficient to alkylate the alkylatable hydrocarbon; separating the reaction effluent stream into an alkylate product phase and a catalyst phase containing catalyst-soluble oil; cooling the catalyst phase to a temperature essentially equal to the alkylation reaction temperature; recycling the cooled catalyst phase to the alkylation reaction; contacting a diolefinic hydrocarbon with an acid-type catalyst at a temperature and pressure sufficient to form additional catalyst-soluble oil and combining the additional catalyst-soluble oil with the circulating catalyst phase.

Abstract: A tubular sample or reagent container for analytical devices, such as automated centrifugal analyzers, in which typically a multiplicity of such containers are arranged in a carrier plate or other means which forms part of the analyzers, with each container having a peripheral edge for bearing on the carrier plate. An abutment is provided on the containers disposed below the peripheral edge and at the periphery of the containers, which abutment is deformable in the centripetal direction.

Abstract: An apparatus for analyzing oxygen, nitrogen and hydrogen which are contained in metals. The apparatus includes a graphite crucible which has a sample therein and which is heated to generate a gaseous mixture of CO, N.sub.2 and H.sub.2. An oxidizer is used to oxidize the CO and H.sub.2 into CO.sub.2 and H.sub.2 O, respectively. The apparatus further includes a thermal conductivity detecting means for detecting CO.sub.2, N.sub.2 and H.sub.2 O, coming from a first gas-chromatographic column which is used for separating H.sub.2 O from the CO.sub.2 and N.sub.2. A second gas-chromatographic column is used for separating CO.sub.2 from N.sub.2. A passage change valve is used for back-flushing the first column. Helium is preferably used as the carrier gas. The apparatus is simple and operates quickly because the three components, O, N and H, can be measured by using a single carrier gas He and a single sample and thus, only a single measurement operation is required.

Abstract: Disclosed herein are a process and apparatus for manufacturing vanadium pentoxide in powder form by the thermal decomposition of ammonium metavanadate containing more than 10% NH.sub.3 in a single operation.

Abstract: An atmospheric control apparatus for use in a forced air ventilation duct is described having an inlet means to receive air from the inside of said duct attached to a replaceable deodorant cartridge, which is itself attached to outlet means terminating within the duct downstream of the inlet to supply an atmospheric control substance such as an odorant or deodorant into the air stream. Air flow through the cartridge is accomplished by the differential pressures present at the inlet and outlet means in the air duct.

Abstract: Novel elements for the analysis of liquids which contain interferents for an analyte assay are described. Interference is reduced in multizone elements by the presence of an interferent-removing zone between the point of introduction of the liquid and the assay-indicator zone wherein the interferent-removing zone comprises a discontinuous phase within a continuous phase. An interferent-removing material is present in the discontinuous phase and the continuous phase is permeable to the analyte, its products and/or the liquid being analyzed.

Abstract: A sample tube for obtaining a column of liquid of predetermined height in laboratory applications comprises a simple and effective construction, with a local restriction in internal diameter a predetermined distance from an inlet end and a movable valve member such as a lead shot disposed in the tube between the restriction and the opposite end, for co-operating with the restriction to retain a column of liquid at the level of the valve member and restriction by surface tension effects. In operation, liquid is drawn into the tube by suction to a level substantially above restriction, then the suction is removed and the liquid is allowed to drain out of the end, passing the lead shot owing to an imperfect seal between the lead shot and the restriction. When the liquid reaches the level of the lead shot and restriction, it is retained at this level by surface tension effects interacting with the lead shot and restriction.

Abstract: Impregnated silica is manufactured by passing a substantially anhydrous solution of a polar organic compound in a non-polar organic diluent through a bed of substantially anhydrous silica particles, under a pressure of at least 200 bars so as to modify the adsorbent properties of the silica particles with the selective properties of the polar compound without impairing the silica particle adsorbing efficiency.

Abstract: In the measurement of iodine value by the Wijs method, the measurement can be effected rapidly by using magnesium acetate or sodium acetate as a catalyst.When the catalyst is used, the reaction time of a sample with a Wijs solution is as short as about 3 minutes. The time required for the measurement is thus reduced remarkably.

Abstract: Pipette with elastic bellows wherein the travel of the bellows is limited by preset stops. The bellows is prestressed between the stops over a range of movement within which the bellows possesses adequate springback force to return to a rest position predetermined by one of the stops.

Abstract: A reagent for the quantitative determination of water in combination with a titration solution containing iodine is described. The reagent contains sulfur dioxide and an anhydrous alkali metal acetate in 2-methoxy ethanol or a mixture of 2-methoxy ethanol and methanol in a volume ratio of at least 10:90. The reagent is characterized in that when it is left to stand no precipitate forms and the increase in control value is kept to a minimum.

Abstract: In a reactor for cracking heavy hydrocarbon oil through a fluidized bed of the particles of natural ores, coke-like materials are deposited on a top of the reactor or pipe inside surfaces of a transfer line from the reactor to a scrubber. To effectively scour out the deposited coke-like materials, particles of natural ores having a mean diameter of a few hundred .mu.m is made to be contained in an effluent gas from the top of reactor, passing through the transfer line at a concentration of 1 to 40 g/m.sup.3. The particles of natural ores have a good effect of scouring out the deposited coke-like materials and can keep the transfer line efficiently clean even with a small amount of the particles of natural ores, decreasing a pressure drop in the transfer line.

Abstract: An apparatus and method are disclosed for automatically monitoring the sodium concentration of a sodium amalgam by means of a wet chemical analysis in which a mineral acid is reacted with a sample of the sodium amalgam to generate an amount of hydrogen gas proportional to the amount of sodium in the amalgam sampled. The amount of such hydrogen gas produced is detected and displayed in units of sodium concentration. A thermal conductivity detector is preferred as the means for determining the amount of hydrogen gas produced.

Abstract: An apparatus for producing silicon carbide consisting mainly of .beta.-type crystal are disclosed. The fine silicon carbide consisting mainly of .beta.-type crystal is produced by charging the starting material of silica and carbon with a mole ratio of C/SiO.sub.2 of 3.2-5.0 into a top portion of a vertical-type reaction vessel having a preheating zone, a heating zone and a cooling zone in this order, descending the starting material by gravity through the reaction vessel, heating the starting material in the heating zone at a temperature of 1,600.degree.-2,100.degree. C. by electrically indirect heating in horizontal direction to effect the formation of SiC, cooling the resulting reaction product in the cooling zone under a non-oxidizing atmosphere, and recovering the cooled product from the bottom portion of the reaction vessel to obtain a product having a composition ratio by weight of silicon carbide, silica and free carbon which lies within the area represented by the area ABCD shown in Fig.

Abstract: An improved high pressure glass column for high performance liquid chromatography which comprises, both ends of the high pressure glass column on which flanges made of the same glass material are arranged, two column end fitting plugs which are made of a fluorine-contained resin and have a small bore for the effluent flow bored in their center, a piston part of a fitting plug inserted in the bore syringe part of the column end and a flange arranged to attach to the flange of the glass column tube, where the inside of the end of the piston part is formed with a conic shape and one or more narrow circled hollows are formed around the outlet of the piston part, two filters made of the fluorine-contained resin placed in between the both ends of the piston part of the fitting plug and the solvent material packed into the column, and two clips fitting and holding the two flanges of the column and the plugs.

Abstract: An apparatus for producing silver halide grains of a uniform size wherein the apparatus comprises a mixing chamber comprising a casing of a polygonal-pillar shape within a reaction vessel filled with an aqueous colloid solution in such a manner that the interior of the mixing-chamber is filled with the aqueous colloid solution, where a water soluble silver salt solution and a water soluble halide solution are supplied by way of conduits to the lower end of the mixing chamber to dilute the solution with the aqueous colloidal solution contained in the mixing chamber, first agitation means disposed in the mixing chamber for rapidly agitating to mix and react both reaction liquids to form silver halide grains, and a second agitation means for immediately discharging the silver halide grains into the reaction vessel to ripen the silver halide grains outside of the mixing chamber.

Abstract: An air pollution attenuation system for copiers employing ammonia gas having a vacuum manifold spanning the copy as it emerges from the developing chamber and connected to a stripping bath preferably reactive with the ammonia as for instance aqueous citric acid where a substantial portion of the residual ammonia is removed, the system also including means for returning and distributing the effluent gas from the bath over the copy downstream from the vacuum manifold.

Abstract: Pipette system for the volumetric extraction and linear deposition of a suspended material, in particular cells or particles. The pipette system consists of a capillary containing a piston inserted in such a way as to prevent the passage of liquids. Part of the rim forming the orifice of the capillary has a projection. The width of the projection determines the width of the smear regardless of the diameter of the capillary, even when the deposition of the suspension onto the slide or the like is contactless.