Abstract:
This invention relates to a process for producing an enhanced adsorbent particle comprising contacting a non-amorphous, non-ceramic, crystalline, porous, calcined, aluminum oxide particle that was produced by calcining at a particle temperature of from 300° C. to 700° C., with an acid for a sufficient time to increase the adsorbent properties of the particle. A process for producing an enhanced adsorbent particle comprising contacting a non-ceramic, porous, oxide adsorbent particle with an acid for a sufficient time to increase the adsorbent properties of the particle is also disclosed. Particles made by the process of the instant invention and particle uses, such as remediation of waste streams, are also provided. The invention also relates to a method for producing an adsorbent and/or catalyst and binder system. The invention also relates to particles made by the process, binders, and methods for remediating contaminants in a stream. The invention also relates to an anchored adsorbent and/or catalyst and binder system.
Abstract:
A reaction product is formed and transferred from an autoclave to a receiving vessel at a laminar flow rate, using a self-adjusting transfer mechanism. A specific amount of water in the receiving vessel is heated and vaporized prior to the reaction product transfer to raise the pressure in the receiving vessel to saturation pressure. A flow passage between the autoclave and the receiving vessel is now opened, and a resulting pressure differential between the autoclave and the receiving vessel initiates the transfer process. A heat exchanger cools the reaction product flowing from the autoclave to the receiving vessel, where the amount of cooling is dependent upon the transfer rate of the reaction product. An increased transfer rate will cause the hotter reaction product entering the receiving vessel to increase the pressure inside the receiving vessel, thereby reducing, or self-adjusting, the transfer rate. The heat exchanger may also generate steam which is fed into the receiving vessel to adjust the pressure in the receiving vessel and thus adjust the transfer rate of the reaction product.
Abstract:
A device for the discharge of bulk material (96) from a pressure vessel (2) is proposed, which comprises at least one sluice bin (24, 26) with a bottom (42, 44) and a top (40) sluice gate. The sluice bin (24, 26) is arranged under a plate (76, 76'), into which it forms an orifice (28, 30) for the bulk material (96). The top sluice gate (40) has a sealing plate (66), which is arranged above this plate (76, 76') in such a way that it can be positioned above the orifice (28, 30) of the sluice bin (24, 26) and, after a sealing connection to the edge of the orifice (28, 30) has been made, can be forced against this edge by overpressure in the pressure vessel (2).
Abstract:
The present invention provides a process and apparatus for feeding powders such as fine, cohesive, or powdery particulate materials from a low pressure system to a high pressure system. There is provided in a preferred embodiment a process and apparatus of pressurizing and feeding carbon black fluff to a polymerization reactor, particularly a gas phase fluidized polymerization reactor to provide for a close-coupling of a carbon black reactor to a polymerization reactor.
Abstract:
An autoclave 10 has a first vessel 12 in which objects are heated, and a second vessel 14 in which the objects are cooled down. A container 24 containing the objects is introduced via a preheating chamber 30 into a chamber 20, and thence into the cavity 16 of the vessel 12. Similarly, at the downstream end of the second vessel 14, a container is removed from a cavity 18 via a chamber 22. Transfer of containers is effected in a manner similar to operation of a lock to limit loss of pressure. When a container is thus removed and a fresh container is loaded, containers in the cavity 16 are advanced upwardly and containers in the cavity 18 are advanced downwardly. A container at the top of the cavity 16 is laterally displaced to the top of the cavity 18, via a chamber 19. The autoclave is thus operated continuously, stepwise. Pressures and temperatures are monitored via an interface 32 and a computer 34. Sterilization values for the objects are computed and advance of the containers are dependant on appropriate sterilization values being obtained.
Abstract:
An apparatus and method for introducing a predetermined volume of suspension into a reactor from a storage vessel. According to the invention the storage vessel is connected via a first conduit to an intermediate vessel which is in turn connected to a feed vessel via a second conduit, the feed vessel is connected via a third conduit to the reactor, each of the first, second and third conduits, is provided with a shut-off valve, the vessels, conduits and valves being so arranged that the suspension can be transferred by gravity from the storage vessel to the intermediate vessel and from the intermediate vessel to the feed vessel and can be transferred from the feed vessel to the reactor by gravity and/or the effect of pressure difference between the feed vessel and the reactor. The present invention also relates to a process for introducing a predetermined volume of suspension into a reactor using the apparatus.
Abstract:
An apparatus for transferring a loading car to a sterilizer chamber having a frame defining an opening, the apparatus comprises a chamber track adapted for supporting the loading car and wherein the chamber track is positioned within the chamber; a carriage track adapted for supporting the loading car and wherein the carriage track is configured to extend parallel to and in axial alignment with the chamber track; connecting devices mounted on an end of the carriage track; and a bridge having a top surface and a bottom surface, the bridge pivotally mounted adjacent the opening of the chamber wherein the bridge may pivot between an open and a closed position, the top surface adapted for supporting the loading car, and the bridge having receiving devices adapted for receiving the connecting devices when the bridge is in the open position.
Abstract:
A method of feeding particulate material into a pressurized fluidized bed combustor including the steps of: feeding the particulate material from a source which is at a substantially lower pressure than that existing in the pressurized fluidized bed combustor into the upper end of an elongate, generally vertical gravity feed conduit constructed to have an inner bore which is substantially smaller at its lower end than at its upper end, and selecting the vertical height of the feed conduit and the extent of reduction in its bore over its length to ensure that the particulate material will move by gravity between the open input end of the conduit and the pressurized fluidized bed combustor notwithstanding the difference in pressure between the pressurized combustor and at the input end of the conduit.
Abstract:
The present invention relates to a process and a device for introducing a catalytically active powder into a reactor (20) for gas phase alpha-olefin polymerization. The device comprises a storage vessel (3) containing the powder, a metering valve (4) delivering metered quantities of the powder into an intermediate chamber (5) comprising at least one obstacle (6) separating an upper part (5a) of the chamber (5) comprising an auxiliary gas inlet (2a) from a lower part (5b) terminated by an outlet orifice (5c). A connecting pipe (18) connects the outlet orifice (5c) to a mixing device (8) situated on a conveying pipework (15) communicating with the reactor (20). The powder is introduced into the reactor in a dilute suspension form and in a more uniform rate.
Abstract:
An apparatus and process for maintaining the purity of solid/granular product and dispensing high purity granular product from a vessel. A noncontaminating surface is provided by a cup, cylinder, or other structure having a surface of silicon, silicon carbide, silicon nitride, sialon, or similar materials and preferably operates as an angle of repose valve in a pressurized system to prevent contamination by undue contact of the high purity product with conventional gastight valves such as ball valves, butterfly valves, pinch valves, etc.