Process and apparatus for industrial fractionation of polymers
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United States of America Patent
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Sep 7, 1993
Grant Date -
N/A
app pub date -
Feb 14, 1992
filing date -
Feb 14, 1991
priority date (Note) -
Expired
status (Latency Note)
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Abstract
In a process for industrial fractionation of polymers using an extraction column and a homogeneous extraction agent a homogeneous feed is supplied to a region of the extraction column which is nearer the upper end thereof when the feed has a greater density than the extraction agent and which is nearer the lower end thereof when the feed has a lower density than the extraction agent. An apparatus for carrying out this process consists advantageously, instead of a pulsed sieve plate column as hitherto, of an unpulsed filling body column which leads to a better separation because a back mixing is avoided in favourable manner.
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