Abstract:
A device for high-pressure treatment, in particular of liquid substances which contain components with a consistency different from that of the liquid. The device comprises a cylinder member (1), two end members (2, 3), a high-pressure piston (4), two high-pressure seals (8, 9) and connection means comprising channels and valve members to conduct the substance to and from the cylinder member (1). When the substance is pressurized, the cylinder member (1), at least one of the end members (3), the high-pressure piston (4) and the two high-pressure seals (8, 9) delimit a high-pressure chamber (10). The connection means are arranged outside the high-pressure chamber and preferably in respective end members (2, 3).
Abstract:
An underground chemical reactor having a closed loop reactor which includes at least a reaction component inlet tube and a reaction product outlet tube and a casing pipe consisting of a double or triple tube and the circulating system for a reaction component such as raw material sludge and a direct chemical reaction system for the reaction component with the deep underground high temperature water of a hot water source formed by a natural hot water source of an artificial crushed zone at a depth of more than 1,000 m, thereby an oxide magnetic material such as soft ferrite, hard ferrite, each kind of ceramics or heat-resisting materials such as xonotlite, dielectric materials, clay materials may be made in the underground chemical reactor.
Abstract:
A process and apparatus using two gas liquid separations when carbonylating propylene to isobutyryl fluoride in hydrogen fluoride result in a savings in recycle pumping energy compared to a one gas-liquid separation process.
Abstract:
This invention is essentially an improved means for contacting solids, liquids, and gases at elevated pressures and at desired temperatures, for providing inherently stable pressures, for conserving the heat of chemical reactions, and for minimizing the power requirement for pumping liquids continuously through a high pressure zone. The invention is particularly useful for processes utilizing physical, chemical, and/or thermal treatment, under elevated pressures, of continuously flowing streams of large volume which may contain suspended solids.The invention is based on the realization that deep boreholes, suitably lined, can be utilized as a particularly efficient apparatus for physical, chemical, and/or thermal processes. The hydrostatic pressures created when the boreholes are filled with liquids or fluidized solids are of sufficient magnitude to promote a great many useful chemical reactions, and there are many other advantages, as partially noted later, that appear in a unique combination when deep boreholes are regarded as an item of process apparatus, rather than as a means of access to water, petroleum, or mineral ores.The following processes are illustrative of the embodiments of this invention:(1) The use of chemical reaction energy in the production of electricity directly by means of fuel cells. Through this invention, it is possible to produce electricity directly from powdered coal or other combustible solids, as well as from combustible gases or liquids.
Abstract:
A process for directly liquefying coal in a reactor including a preheating section and a reaction section, each having a plurality of pressure-resistant vertical pipes, comprises introducing into the preheating section a paste consisting of finely divided coal, catalyst and heavy oil. In the preheating section the paste is heated to a temperature of 380.degree. to 410.degree. C. and preheated hydrogen is blown into each pipe to create a velocity of Reynolds number equal to at least 3.times.10.sup.3 and an axial dispersion coefficient of not more than 0.05. The preheated paste and hydrogen are forwarded to the reaction section where they are heated to a temperature of 400.degree. to 500.degree. C. and further hydrogen is introduced into each pipe of the reaction section to maintain the velocity and axial dispersion values and a high partial pressure of hydrogen. The total quantity of hydrogen introduced is 1 to 3 times the stoichiometric value.
Abstract:
In a process for directly liquefying coal, a paste consisting of finely divided coal, catalyst and heavy oil can be treated for thermal cracking and hydrocracking with a high liquid/space ratio and short residence time in a preheating section and a reaction section. An apparatus threfor comprises a plural number of pipe units having apertures for hydrogen injection and apertures for the paste of a low concentration or heavy oil injection and a gas-liquid separator for removing H.sub.2 O, methane, etc., the pipe units being formed in such a manner that a Reynolds number of 3.times.10.sup.3 or greater and an axial dispersion coefficient of 0.05 or smaller are achieved for the fluid flow therein.
Abstract:
A high-temperature, fluid-wall chemical reactor can be equipped with a variable profile, counterflow heat exchanger and a reaction product control system. The heat exchanger includes two tubular walls, positioned concentric of one another, and a spiral baffle disposed between the two walls to define a spiral, annular coolant channel. The walls and baffle are made of a refractory material. The heat exchanger has an inlet and an outlet to permit a coolant to be circulated through the coolant channel. The reaction product control system includes a reaction product analyzer and means for withdrawing and transferring samples of reaction product exiting the reactor. The reaction product analyzer can receive samples of reaction product and generate a signal corresponding to deviations between the chemical composition of the product and a preselected composition. The control system also includes a reactor temperature controller to vary a temperature of the reactor in response to the signal from the reaction product analyzer to reduce the deviations.
Abstract:
The present invention concerns a reactor of the tubular type, with a high heat exchange, for the catalytic production under high pressure of alpha-olefine polymers and copolymers, in particular polymers and copolymers of ethylene.More particularly, the tubular reactor of this invention consists of three coaxially arranged tubes, distanced from each other in such a way as to create between the outer tube and the intermediate an annular interspace suited for the circulation of the refrigerating fluid and between the intermediate tube, sized for very high pressures, and the innermost tube an interspace that will form the exothermic reaction zone proper, said innermost tube being of the low-pressure type and forming the preheating zone of the process fluid, fed in under pressure from the outside by the action of the reaction heat that develops inside said intermediate tube, said preheating zone extending up to over half the length of the reactor and, at the end of it, defining the reaction starting zone that is the feeding zone of the catalyst or the like, means for the control of the temperature in said reaction starting zone through the immission of fresh process fluid into the reaction starting zone itself, said process fluid having been drawn from the inlet of the reactor or, by the recycling, into the inlet of the reactor, of process fluid drawn from the end of the preheating zone and refrigerated, as well as means for balancing the pressures between said reaction zone and said preheating zone.
Abstract:
In a process for polymerizing ethylene in a two-zone autoclave reactor comprising a top reaction zone and a bottom reaction zone which process comprises polymerizing ethylene in said top reaction zone at 130.degree. to 200.degree. C and at a reaction pressure of 1,000 to 1,800 kg/cm.sup.2 using an initiator, sending the resulting reaction mixture from the top reaction zone to the bottom reaction zone, and further promoting the polymerization at 220.degree. to 280.degree. C using an initiator which is same as or different from the initiator in the top reaction zone, the improvement which comprises feeding 75% or more of the ethylene to the top reaction zone of the two-zone reactor, said two-zone reactor being constructed so that the volume ratio of top reaction zone to bottom reaction zone is 1.5 to 6 and being provided with two or more feed inlets for each of the ethylene and the initiator in the top reaction zone in the direction extending through the two reaction zones.
Abstract:
A PROCESS AND APPARATUS FOR THE PRODUCTION OF ETHYLENE POLYMERS AT HIGH PESSURES WITHIN A MODIFIED, STIRRED AUTOCLAVE-TYPE REACTION SYSTEM SUBDIVEDED INTO THREE ZONES, INTO THE FIRST OF WHICH A FIRST, LOW TEMPERATURE FREE RADICAL, CHAIN-INITATING CATALYST IS FED, AND INTO THE SECOND OF WHICH A SECOND, INTERMEDIATE TEMPERATURE FREE RADICAL, CHAIN-INITATING CATALYST AND A THIRD, HIGH TEMPERATURE FREE RADICAL, CHAIN-INITIATING CATALYST ARE INTRODUCED. THE FIRST ZONE IS SO AGITATED AS TO PRODUCE BOTH RADIAL AND END-TOEND MIXING THEREIN TO THEREBY ESTABLISH A SIBSTANTIALLY UNIFORM REACTION TEMPERATURE THEREIN, WHEREAS THE SECOND ZONE IS SO AGITATED AS TO PRODUCE RADIAL MIXING THEREIN, WITH THE DEGREE OF END-TO-END MIXING DECREADING LONGITUDINALLY OF THE ZONE TO THEREBY ESTABLISH A TEMPERATURE DIFFERENTIAL LONGITUDINALLY THEREOF. BOTH RADIAL AND ENDTO-END MIXING ARE ESTABLISHED WITHIN THE THIRD ZONE IN A MANNER SUCH AS TO INCREASE BACK MIXING OF THE REACTION MIXTURE THEREIN, AND THEREBY CONTROL THE TEMPERATURE OF THE REACTION MIXTURE LEAVING SUCH ZONE AND EXITING FROM THE REACTION SYSTEM.