摘要:
A process and an apparatus for the continuous ozonization of unsaturated organic compounds in the presence of water, wherein(a) the fresh charge mixture of unsaturated compounds to be ozonized is reacted in at least one first reactor in parallel flow with ozonic gas, which was previously used for ozonizing a previously partially ozonized charge mixture, and(b) simultaneously a previously partially ozonized charge mixture is reacted in at least one second reactor in parallel flow with fresh ozonic gas,and wherein, optionally, said at least two reactors contain at least two mixing sections for mixing the charged liquid and gaseous phases with each other where the hydraulic diameter of the mixing elements in the individual mixing section is reduced in the flow direction.
摘要:
An ammonium nitrate particle removal apparatus is joined with an exhaust gas flow of a nitrogen oxides abatement system as utilized in a nitric acid producing plant for removing ammonium nitrate particles carried in the gas flow. The apparatus includes a filter element for receiving the gas flow and substantially trapping the ammonium nitrate particles. Injection nozzles inhabit a conduit which delivers the exhaust gas flow to an inlet of the filter and inject a water mist into the gas flow which mist acts to irrigate the filter. As a result of this irrigation, the trapped ammonium nitrate particles go into solution and drop by the action of gravity to a tank or reservoir below the filter element, where the solution may be recovered for other uses as desired.
摘要:
Method and apparatus for continuous preparation of an acrylonitrilebutadienestyrene copolymer comprises on-stream mounted: a prepolymerization reactor, a polymerization reactor, a reactor for the final polymerization and an apparatus for the removal of the non-polymerized monomers from the reaction mass. The polymerization reactor contains a stirring means which has a tube fixedly mounted coaxially with a shell and a mixing member disposed inside the tube. The stirring member is embodied in the form of a closed cylinder. At least one slot is provided in the tube wall. This slot is extending over the entire length of the tube. In the reactor there is also a partition positioned between the reactor shell wall and the stirring member. The partition is passing through the middle of the slot and intended for division of the reactor shell cavity into a suction zone and a pumping zone. Upon rotation of the stirring member there is effected a repeated circulation of the reaction mass within the reactor shell cavity in planes perpendicular to the longitudinal axis thereof.The present invention makes it possible to carry out the intermediate polymerization process at a constant composition of the reaction mass and a constant degree of conversion of the monomers and to obtain copolymers with various predetermined properties.
摘要:
In addition to the apparatus disclosed in the prior patent applications of which this application is a continuation-in-part, a reaction chamber is provided with mercury vapor quartz discharge lamps. In close proximity to the lamps are spheres, or thin continuous wires, or filaments or other physical configurations of laser-type material which produce relatively coherentradiation in a manner similar to lasers. The spheres or filaments include concentric partially reflective surfaces, and include an active material which is pumped by the efficient spectral radiation of the mercury vapor, and radiates at a frequency or frequencies matched to the absorption characteristics of the feedstock being fed through the reaction chamber. The laser-type material may be operated to produce output radiation at a harmonic, such as the second, third, fourth or higher harmonic of the basic laser radiation, and these harmonic output radiations may be enhanced by using semi-reflective coatings which reflect in the order of 70% to 90% of the radiation, particularly in the case of spheres. High energy content ultraviolet radiation may also be generated by the "beating" of radiant energy from the mercury vapor tubes and the laser-type material. Efficiency is enhanced by chain reactions which occur with the feedstock materials being fed to the reaction chamber, and these chain reactions involve the generation and regeneration of excited atoms of oxygen or other substances.
摘要:
A method for the dense-phase flow of particulate solids utilizes a pressurized feeder and flow splitter which transports and equally divides particulate material at essentially the bulk density with only the gas contained in interstices of the solid particles being used to transport the particles. The feeder comprises a vessel which is pressurized, a gas source for pressurization and an outlet line with a full opening valve located immediately adjacent to the feeder. The loaded vessel containing particulate matter is pressurized, followed by opening the valve adjacent the feeder, the valve and relatively empty downstream line when flow is initiated being the key to successful operation of the dense-phase feeder. The downstream flow divider evenly distributes the dense-phase material to, for example, a multiplicity of feed passages in a multi-passage injector.
摘要:
A polymerization process is carried out in at least two zones, wherein in one zone polymerization is effected in the presence of a liquid phase which is at least one liquid olefine monomer and in a subsequent zone polymerization is effected by contacting the solid polymer with a gaseous olefine monomer, the product from the first zone being subjected to a concentration stage to remove some of the liquid olefine monomer before the concentrated polymer mixture is passed to the subsequent zone for polymerization with the gaseous olefine monomer. The monomer in each case may be the same, for example liquid propylene in one zone and gaseous propylene in a subsequent zone. The concentration stage may be effected using a hydrocyclone.
摘要:
A sodium storage and injection system for delivering atomized liquid sodium to a chemical reactor employed in the production of solar grade silicon. The system is adapted to accommodate start-up, shut-down, normal and emergency operations and is characterized by a jacketed injection nozzle adapted to atomize liquefied sodium and a supply circuit connected to the nozzle for delivering thereto liquefied sodium comprising a plurality of replaceable sodium containment vessels, a pump interposed between the vessels and the nozzle, and a pressurizing circuit including a source of inert gas connected with the vessels for maintaining the sodium under pressure.