Abstract: A heavy distillation fraction comprising tertiary butyl hydroperoxide, tertiary butyl alcohol, impurities and dissolved molybdenum catalyst resulting from the removel of propylene, propylene oxide and tertiary butyl alcohol from an epoxidation reaction product is mixed with about 5 to about 10 wt. %, based on the weight of the heavy liquid distilation fraction, of a lower aliphatic alcohol containing from 1 to 3 carbon atoms to provide a charge mixture, and the charge mixture is:charged to a falling film evaporator and separator therein, under evaporator operating conditions including a temperature within the range of about 20.degree. to about 150.degree. C. and a pressure of about 1 to about 200 mm Hg., into an overhead vaporized fraction comprising substantially all of the aliphatic alcohol and from about 80 to about 95 wt. % of the heavy distillation fraction charged to the falling film evaporator.

Abstract: An impure propylene oxide feedstock contaminated with from about 50 to about 1000 ppm of methanol and from about 0 to about 1 wt. % of acetone is charged to the lower half of an extractive distillation column containing at least about 25 theoretical plates and an extractive distillation agent consisting essentially of a blend of acetone and water (acetone/water blend) containing about 20 to about 30 wt. % of acetone and, correspondingly, about 80 to about 70 wt. % of water is charged to the tower at a point 4 to 7 theoretical stages above the impure propylene oxide feed point; the extractive distillation agent being introduced into the extractive distillation column in the ratio of said feedstock to said extractive distillation agent of from about 5:1 to about 20:1, whereby an overhead distillate fraction is obtained consisting essentially of propylene oxide contaminated with not more than about 60 ppm of methanol, not more than about 0.02 wt. % of acetone and not more than about 0.3 wt. % of water.

Abstract: A multi-function control component for use in dental vacuum systems includes, within a single housing, a vacuum control device for controlling the vacuum intensity within the system; a first air filter device for cleaning air permitted to enter the system by the vacuum control device; a second air filter for filtering gases flowing from an associated separating tank to a vacuum pump; a moisture detection device mounted in the housing for shutting down the vacuum pump drive motor upon detection of a predetermined level of moisture in the housing; a vacuum intensity measuring device; and a sealing device for sealing off the separating tank from the vacuum pump. The vacuum pump is a rotary vane pump, and is operatively connected to dental aspirator tips.

Abstract: Electron source with micropoint emissive cathodes and display means by cathodoluminescence excited by field emission and using said source. Each cathode (5) comprises an electrically conductive layer (22) and micropoints (12) and, according to the invention, a continuous resistive layer (24) is provided between the conductive layer and the micropoints. The display means comprises a cathodoluminescent anode (16) facing the source.

Abstract: Display unit by cathodoluminescence excited by field emission.It comprises a plurality of elimentary patterns, each having a cathodoluminescent anode and a cathode able to emit electrons. Each cathode comprises a plurality of electrically interconnected micropoints subject to electron emission by field effect when the cathode is negatively polarized compared with the corresponding anode, the electrons striking the latter, which is then subject to a light emission. Each anode is integrated to the corresponding cathode.Application to the display of stationary or moving pictures.

Abstract: It has been discovered in accordance with the present invention that a tertiary butyl alcohol/ditertiary butyl peroxide azeotrope may be recovered from a product containing tertiary butyl alcohol and ditertiary butyl perioxide by distilling the tertiary butyl alcohol product to obtain an overhead fraction containing substantially all of the ditertiary butyl peroxide as a ditertiary butyl peroxide/tertiary butyl alcohol azeotrope and other contaminants.It has been further discovered in accordance with the present invention that the ditertiary butyl peroxide can be recovered from the distillate fraction by extraction with water (e.g., in a countercurrent water extraction tower) to provide a ditertiary butyl peroxide product of any desired degree of purity.

Abstract: A process of producing a display operating by cathodoluminescence excited by field emission, including forming parallel cathodes on a glass substrate, depositing a silica coating on the cathodes, then a conductive coating and then producing a matrix of holes in the conductive coating and silica coating, depositing on the perforated conductive coating a fourth coating not covering the holes and then depositing on the complete structure a coating of an electron emitting material, eliminating the fourth coating so as to expose the microemitters, forming in the conductive coating grids crossing the cathodes and placing above the grids an anode covered by a cathodoluminescent coating.

Abstract: A wear-protective layer for cutting tools is formed by the chemical vapor deposition or chemical plasma deposition or plasma sputtering by depositing a plurality of layers to a support of the cutting tool to form a multilayer in which each successive layer remoter from the support has a higher elasticity module and a greater diamond portion than the preceding layer. The outermost layer is a layer of diamond.

Abstract: Spin polarized electron source using an emissive micropoint cathode. At least one portion of each micropoint, including the top of the latter, is ferromagnetic, so that the electrons emitted by the cathode are spin polarized in a given direction, when the portion is subject to a magnetic field parallel to the given direction.

Abstract: It has been discovered in accordance in accordance with the present invention that a tertiary butyl alcohol/ditertiary butyl peroxide azeotrope may be recovered from a product containing tertiary butyl alcohol and ditertiary butyl peroxide by distilling the tertiary butyl alcohol product to obtain an overhead fraction containing substantially all of the ditertiary butyl peroxide/tertiary butyl alcohol azeotrope and other contaminants.It has been further discovered in accordance with the present invention that the ditertiary butyl peroxide can be recovered from the distillate fraction by extraction with ethylene glycol (e.g., in a countercurrent ethylene glycol extraction tower) to provide a ditertiary butyl peroxide product of any desired degree of purity.

Abstract: A method and a device for controlling a drive of successively operated grinding disks which are made of different compositions. The condition, for example metallic inclusions or the like, in each individual grinding disk is scanned by means of a sensor the signal of which is fed to a signal transmitter and stored in a storage connected to the drive of the grinding disks, which is thereby controlled.

Abstract: Motor-fuel grade tertiary butyl alcohol which is prepared, for example, by reacting propylene with tertiary butyl hydroperoxide to form propylene oxide and a tertiary butyl alcohol reaction product contaminated with residual amounts of tertiary butyl hydroperoxide and ditertiary butyl peroxide can be effectively catalytically treated under mild conversion conditions including a temperature of about 80.degree. to 280.degree. C. with an unsupported catalyst composed of nickel, copper, chromia and iron, or the oxides thereof, or a catalyst containing nickel, copper, chromia and iron which is supported on silica in order to substantially selectively convert the two peroxide contaminants to tertiary butyl alcohol and to thereby provide a treated tertiary butyl alcohol product substantially free from contaminating quantities of such peroxides.

Abstract: A crushed hydrocarbon-bearing material containing hydrocarbon and foreign mineral constituents is dispersed in fused alkali metal caustic to remove the sulfur content and release the foreign mineral matter from the hydrocarbon material for recovery and/or upgrading of the hydrocarbon content. The process permits recovery of 80-95% of the available kerogen or other hydrocarbon in a mineral matrix such as oil shale rock and conditions a solid fossil fuel such as coal, as well as the kerogen or other hydrocarbon released from the mineral matrix, for removal of substantially all remaining ash and other foreign mineral matter by subsequent washing of the hydrocarbon product in an aqueous solution of acid.

Abstract: A method of trueing grinding disks comprises the steps of engaging the outer layer of a grinding disk during rotation thereof with a predetermined speed with a driven diamond trueing roll and spaced from the trueing roll with a trueing disk having a peripheral speed of 0.5-6 meters per second and preferably 1 meter per second relative to the peripheral speed of the grinding disk. The trueing of the grinding disk can be performed while the grinding disk grinds a workpiece.

Abstract: An antenna, particularly suitable for two-way communication between a communication satellite and an aircraft in flight, having a circular polarization response, comprising a T-matched dipole element producing a pattern polarized parallel to the axis of the aircraft fuselage, and having a slot therein which is separately excited to produce an E field orthogonally polarized with respect to the pattern of the dipole. By exciting the dipole and the slot in phase quadrature, the combined patterns provide circular polarization as is necessary for satellite communications. The shape of the antenna enclosure has a very low drag and favorable aerodynamic characteristics.

Abstract: Electrolytic device for light display on a dark background comprising a light source which illuminates a cell formed by two insulating walls between which is an electrolyte. One wall has an electrode comprising a plurality of segments for display and the other wall has a counter-electrode. The display is obtained by electrochemical deposition of dark coating material on the electrode.

Abstract: A method for removing ash, sulfur and inertinite from crushed coal includes float/sink treatment in aqueous solutions of monosaccharides, disaccharides, hydrogenated monosaccharides, hydrogenated disaccharides and mixtures thereof. Such solutions also improve the performance of such heavy media physical cleaning equipment as cyclones, heavy media baths, tables, spirals, hydroclones, flotation cells, jigs and solid-bowl centrifuges.

Abstract: An explosion-resistant fixture is provided comprising a ballast compartment and lamp compartment. The ballast compartment contains the usual electrical components for the fixture and all voids within the compartment are filled with a non-flammable material thereby preventing explosive gases or volatile liquids from entering the compartment. The filling material is preferably an expanded closed cell foam material.

Abstract: Electrolytic display cell comprising, between two electrodes of appropriate shapes, a liquid electrolyte containing metal ions, wherein said electrolyte comprises ions of a first metal and ions of a second metal, said first and second metals having similar redox potentials.Process for increasing the storage life of the display in a liquid electrolyte cell containing ions of a first metal, wherein ions of a second metal are added, the first and second metals having similar redox potentials.

Abstract: A method for making water-soluble potassium formate substantially free of water-insoluble salts selectively and in high yield at temperatures at or below about 100.degree. C., includes contacting potassium sulfate, potassium carbonate or a mixture of potassium and sodium carbonate and potassium and sodium sulfate with calcium formate, forming water-soluble potassium formate and water-insoluble calcium sulfate, calcium carbonate, or mixtures thereof, thus permitting recovery of substantially potassium-free calcium sulfate, calcium carbonate or both, and substantially calcium sulfate-free calcium carbonate-free potassium formate from the aqueous media.