Abstract:
PROBLEM TO BE SOLVED: To provide a system for recovering and purifying a carbon dioxide-containing stream from a batch process tool (10).SOLUTION: A multi-phase contaminated stream containing at least carbon dioxide and one or more cosolvent (20, 30) is removed from the process tool (10) and conveyed to at least one intermediate pressure separator (40). The contaminant-containing stream is separated into an intermediate pressure carbon dioxide-enriched vapor stream (42) and an intermediate pressure solvent and contaminant-enriched stream (43) in the intermediate pressure separator (40).
Abstract:
A system and apparatus for the delivery of a high purity carbon dioxide fluid is provided. The system includes at least two separate semiconductor applications (6, 14), wherein one of said applications requires refrigeration. A first portion of the carbon dioxide stream is drawn off the supply line (1) and directing it to a first semiconductor application (6). A second portion is drawn off the supply line (1) and routed to a second semiconductor application (14) across a pressure-reduction device (12) thereby reducing the temperature and pressure of the second gas, entering the second semiconductor application.
Abstract:
The present invention relates to a method and apparatus for pretreating a polymeric material in a treatment chamber (12). The method includes providing a polymeric material component into the treatment chamber (12) and introducing a carbon dioxide fluid in supercritical state therein. The component is exposed to the carbon dioxide fluid to extract non-volatile organic residue contained in the component. The contaminated carbon dioxide fluid containing the extracted non-volatile organic residue is removed from the treatment chamber such that the organic residue does not deposit onto the polymeric material component by depressurizing the treatment chamber. Thereafter, the component is removed from the treatment chamber (12).
Abstract:
Oxygen or other gases are dissolved in large bodies of liquid by injection under a baffle for passage into a submerged hollow draft-tube-impeller means assembly for downward passage therein. Liquid containing dissolved gas is dispersed throughout the body of liquid, while any undissolved gas is effectively recovered and recycled. An embodiment specially designed for use with oxygen containing gases having less than 96 vol.% oxygen is also disclosed.
Abstract:
A cryogenic separation arrangement wherein feed air is processed simultaneously through two regenerator systems (2-5) and then separated in a reflux condenser (22,23), with product (141) and waste (144) from the reflux condenser processed through one and the other respectively of the regenerator systems (2-5).
Abstract:
Un sistema de rectificacion criogénica para producir nitrogeno, especialmente a bajas velocidades de flujo produccion, en donde el aire de alimentacion que entra es enfriado mediante un regenerador sin la necesidad de desequilibrio del extremo frío y en donde el líquido criogénico exogeno se agrega a la columna de rectificacion.
Abstract:
A system provides an oxygen-bearing gas and a gaseous reactant stream to a fluidized bed reactor. A sparger causes an entraining of the oxygen bearing gas into the reactant gas stream. A feed line couples the sparger to the reactor's fluidized bed and introduces the reactant gas stream and entrained oxygen-bearing gas directly into contact with the fluidized bed. A controller controls both the amount of oxygen-bearing gas and the gaseous reactant so that, at the point of feed injection, the fluidized bed catalyst does not experience an oxygen deficiency. To assure safety, the reactant content of the combined feed and oxygen stream is maintained above an upper flammability limit, preferably with a safety margin of at least 25%. In one embodiment, the system enables the production of acrylonitriles from a feed stream comprising ammonia, propylene and oxygen.
Abstract:
A cooling system includes a unit (10) for processing product to be cooled or frozen. A secondary refrigeration loop (16) is connected to this unit (10) and introduces a refrigerant at or near atmospheric pressure into the unit. The secondary refrigeration loop (16) may be open or closed. The secondary loop (16) includes a secondary heat exchanger (20) for cooling the refrigerant. A primary, closed refrigeration loop (24), operating at a pressure of not less than 2 atmospheres, includes a forward flow path which comprises a primary refrigerant compressor (36,38) for producing compressed primary refrigerant, a primary heat exchanger (30) for receiving and cooling the compressed primary refrigerant and an expander (42) for further cooling and transferring the compressed refrigerant to the secondary heat exchanger (20) to enable cooling of the secondary refrigerant. The primary loop (24) further includes a return flow path from the secondary heat exchanger (30) to the primary refrigerant compressor (36,38) and to the primary heat exchanger (30). The primary heat exchanger (30) thereby provides heat exchange from the return flow path to the forward flow path to accomplish a cooling action.
Abstract:
Oxygen or other gases are dissolved in large bodies of liquid (1) by injection under a baffle (2) for passage into a submerged hollow draft-tube-impeller (4,5) means assembly for downward passage therein. Liquid containing dissolved gas is dispersed throughout the body of liquid, while any undissolved gas is effectively recovered and recycled.
Abstract:
A cryogenic separation arrangement wherein feed air is processed simultaneously through two regenerator systems and then separated in a reflux condenser, with product and waste from the reflux condenser processed through one and the other respectively of the regenerator systems.