Abstract:
A bundle assembly for vertical, gravity flow driven polymerization reactors for combinations of high viscosity, high throughput, and thin polymer films is provided. The bundle assembly includes static internal components that provide large areas of free liquid surfaces in contact with the atmosphere of the reactor while still attaining sufficient liquid holdup times for polymerization to take place. The bundle assembly includes one or more stationary film generators. The bundle assembly further includes one or more stationary arrays of film support structures. Each of the film support structures has a first side and a second side. Both sides of the film support structure are coated with flowing polymer. The vertical arrangement of components in the bundle assembly cause the polymeric melt to cascade down the vertical length of a reaction vessel interior that incorporates the bundle assembly. The present invention also provides a polymerization reactor that incorporates the assembly of the invention and a method of increasing the degree of polymerization of a polymer melt by using the assembly of the invention.
Abstract:
A reactor including a rotatable disc (3) having a surface (5) onto which reactant (15) is supplied by way of a feed (4). The disc (3) is rotated at high speed, and the reactant (15) spills over the surface (5) so as to form a film (17). The surface (5) is provided with features to enhance its surface area, such as a metal mesh (60), thereby helping to increase the residence time of the reactant (15) on the surface (5) and to help mixing.
Abstract:
A thin film manufacturing system, wherein a stage for placing a substrate thereon is disposed within a vacuum reactor and a gas head for supplying a film forming gas to a central area on a top face of the vacuum reactor is arranged so that the gas head is opposed to the stage. A cylindrical sleeve member is disposed and comes in close contact with a side wall of the stage to surround a periphery of the stage. The height of the stage can be established at the position where the volume of a second space formed below the stage and connected to a vacuum discharge means is larger than that of a first space formed above the stage, in such a manner that an exhaust gas is isotropically discharged from the first space without causing any convection current therein through the interstice between the sleeve member and an inner wall surface constituting the reactor.
Abstract:
A mixing box 1 comprises a stirring chamber 2 in which two gas-introduction pipes 5, 6 for introducing gases are arranged in such a manner that the gas-introduction inlets 5a, 6a thereof are opposed to one another and a diffusion chamber 3 for diffusing a gas mixture, wherein a partition plate 4 having a specific shape is positioned between the stirring chamber and the diffusion chamber in such a manner that the volume of the diffusion chamber is larger than that of the stirring chamber, wherein a gas-supply opening 7 is arranged, on the partition plate, at a desired position on the lower side of the direction perpendicular to the straight line connecting the two gas-introduction inlets, the box being able to uniformly admix gases having different masses and having a simple structure. The partition plate has a shape of a curve of second degree, which is convex with respect to the bottom of the mixing box. The present invention also relates to a thin film-manufacturing system equipped with the mixing box 1 and a method for preparing a film using a film-forming gas, which is uniformly admixed together in the mixing box. The present invention also relates to a thin film-manufacturing system, which has a simple structure and can be manufactured at a low cost and which also permits the inhibition of the generation of any turbulent flow, convection current and heat convection and the formation of a uniform gas stream of a mixed gas, wherein a stage 53 for placing a substrate thereon is disposed within the vacuum reactor 2 and a gas head 57 for supplying the film-forming gas to the central area on the top face of the vacuum reactor 2 is arranged in such a manner that the head is opposed to the stage 53. A cylindrical sleeve member 61 having a desired length is disposed while it comes in close contact with the side wall of the stage 53 to thus surround the periphery of the stage and the height of the stage can be established at the position at which the volume of a second space formed below the stage and connected to a vacuum discharge means is larger than that of the first space, in such a manner that an exhaust gas is isotropically discharged from a first space formed by the gas head and the upper face of the stage without causing any convection current therein through the interstice between the sleeve member and the inner wall surface constituting the reactor.
Abstract:
A falling film plasma reactor (FFPR) provides a number of benefits for the treatment of process gases. The falling film plasma reactor uses high voltage alternating current or pulsed direct current which is applied to radially separated electrodes to thereby create a dielectric breakdown of the process gas that is flowing within the large radial gap between the two electrodes. Typical plasma reactors often utilize fixed dielectric construction which can result in potential failure of the device by arcing between the electrodes as portions of the dielectric fail. Such failures are prevented by using a dielectric liquid that constantly flows over the electrodes, or over a fixed dielectric barrier over the electrodes.
Abstract:
A reactor including a rotatable disc (3) having a region (13) in an upper surface (5) thereof. Reactant (15) is supplied to the region (13) by way of a feed (4), the disc (3) is rotated at high speed, and the reactant (15) moves from the region (13) so as to form a film (17) on the surface (5). As the reactant (15) traverses the surface (5) of the disc (3), it undergoes chemical or physical processes before being thrown from the periphery of the disc (3) into collector means (7).
Abstract:
Processess and apparatus are provided to generate and use continuous and controlled liquid film for industrial and commercial applications requiring fluid-liquid contacts. In one version, a housing has a bottom and a tray mounted therein. The tray separates an upper section for holding liquid from a lower section for liquid-fluid interaction. Uniformly spaced, thin, straight film guides in close proximity extend downwardly from the tray towards the bottom. A narrow slit is formed in the tray along each line of film guides for enabling liquid in the upper section to flow to the lower section in the form of a flowing liquid curtain. The fluid can be a gas entering and exiting the housing through ports provided therein. In a preferred embodiment, a vertically extending tubular member is mounted centrally within several closed loops of film guides and extends through the tray. An adjustable sleeve is mounted on top of the tubular member and the tops of the film guides are secured to this sleeve. The invention may be used in a liquid-gas contacting column that comprises an upright vessel with a liquid inlet at the top and liquid outlet in a bottom portion. A series of trays are mounted one above the other in the vessel.
Abstract:
The present invention includes an isoparaffin:olefin alkylation process and apparatus in which liquid acid inventory is reduced and temperature control is improved by reacting the isoparaffin:olefin feed with a thin film of liquid acid catalyst supported on a heat exchange surface.
Abstract:
The invention relates to a multiple phase flow tube for evaporating and reacting components in compound mixtures in which a spiral pipe is arranged within a multiple phase flow pipe. The components are propelled by means of an internally flowing gas stream in an annular shaped passage formed by a spiral tube and a second tube arranged as a core of the spiral tube. The second tube contains a heat exchange medium. The spiral tube is arranged within a cylindrical casing which contains a heat exchange medium. A gaseous stream of a reduced amount is then sufficient for carrying out the particular chemical process desired.
Abstract:
The invention relates to an apparatus for heat-mass exchange processes with participation of a liquid, comprising at least one sprinkling device installed in the casing with a provision for rotation around its own axis and made up from chutes curved into a multiple-start spiral diverging from the axis of the sprinkling device. At least the peripheral portions of at least two chutes, as they gradually recede from the axis of the sprinkling device, are displaced in a direction parallel to the axis of the sprinkling device so that the peripheral ends of the chutes are arranged in different planes which are perpendicular to the axis of the sprinkling device.