 Method and apparatus for monitoring blood components |
| What is claimed is: 1. A method of monitoring concentration of components of blood flowing in a ... |
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| Blood parameter measurement |
| The present invention provides an apparatus and method for measuring blood parameters such as ... |
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| Apheresis apparatus and method |
| The present invention provides a pheresis apparatus and method for increasing blood component yield ... |
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| Method for producing blood component products |
| The present invention is directed to a method and apparatus for producing blood component products, ... |
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| Method for collecting a blood component concentration |
| The invention provides a method of separating selected blood components. The method separates blood ... |
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| Spillover collection of sparse components such as mononuclear cells in a centrifuge apparatus |
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| Systems and methods for collecting diluted mononuclear cells |
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| Microporous diffusion apparatus |
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Method for treating thermoplastic polymers
| Details |
Inventors: Bennett, Richard J.;
Assignee: Phillips Petroleum Company (Bartlesville, OK)
Primary Examiner: Kight; John
Assistant Examiner: Moore; M. L.
Attorney, Agent or Firm: Chirgott; Paul S.
A method and apparatus for purifying, devolatilizing and/or sheeting a thermoplastic material in which a high density, flowable heat exchange material, having a density substantially above the density of the thermoplastic material and which is essentially immiscible therewith, is continuously circulated through a contact zone in a manner to maintain an extended surface area body of the high density heat exchange material in the contact zone, the thermoplastic material is introduced into and withdrawn from the contact zone in a manner to form a continuously flowing layer of the thermoplastic material across the surface of the body of high density heat exchange material. Thermoplastic material may be introduced into the contact vessel as a powder, melted in an intermediate section of the contact vessel, resolidified at the opposite end of the contact vessel and withdrawn as a sheet of thermoplastic material. Volatilizible impurities or carriers for the thermoplastic material are volatilized while the thermoplastic is being sheeted or a liquid form, solution emulsion or dispersion of the thermoplastic material may be devolatilized and purified. An apparatus is also provided in which a vessel contains the body of high density heat exchange material, the thermoplastic material is introduced above the body of high density heat exchange material or into the body of high density heat exchange material adjacent the bottom thereof and the layer of thermoplastic material is withdrawn, preferably along with a portion of the high density heat exchange material from the surface of the high density heat exchange material, and the thermoplastic material and high density heat exchange material are separated as necessary and the high density heat exchange material recirculated to the contact vessel. |
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DETAILED DESCRIPTION It is an object of the present invention to provide an improved method and apparatus for treating thermoplastic polymers, which overcomes the above and other disadvantages of the prior art.
A further object of the present invention is to provide a method and apparatus for drying, devolatilization and/or sheeting of thermoplastic polymers, which reduces the energy requirements of processing.
Another and further object of the present invention is to provide an improved method and apparatus for drying, devolatilization and/or sheeting of thermoplastic polymers, which utilizes simple and inexpensive equipment.
Yet another object of the present invention is to provide an improved method and apparatus for drying, devolatilization and/or sheeting of polymeric materials, which utilizes equipment which is simple to operate and maintain.
Another and further object of the present invention is to provide an improved method and apparatus for drying, devolatilization and/or sheeting of thermoplastic polymers, which reduces damage to the polymer.
These and other objects of the present invention are attained by circulating a body of a molten, normally-solid material, having a density significantly above the density of said thermoplastic material and which is essentially immiscible with said thermoplastic material, through a contact zone in a manner to form an in extended surface area body said molten, normally solid-material in said contact zone and continuously introducing said thermoplastic polymer into said contact zone and withdrawing said thermoplastic polymer from said contact zone in a manner to produce a continuously flowing layer of said thermoplastic polymer across the surface of said body of molten, normally-solid material.
Apparatus for the practice of the subject method includes a contact vessel adapted to maintain an extended surface area body of molten, normally-solid material therein, means for introducing molten, normally-solid material into the contact vessel, means for heating the body of molten normally solid material in the contact vessel, means for introducing a thermoplastic polymer material into the contact vessel in a manner to produce a flowing layer of the polymer on the surface of the body of molten, normally-solid material and means for withdrawing the layer of polymer from the contact vessel
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