Centrifugal devolatilizer

Details Centrifugal devolatilizer Centrifugal devolatilizer

1989-01-17

1990-07-10

Nozick, Bernard

Gas separation

Means within gas stream for conducting concentrate to collector

55203, B01D 1900

Patent

active

049404725

ABSTRACT:
A devolatilization apparatus is provided which removes volatiles from a variety of polymer products utilizing centrifugal forces to control the residence time of the polymer in the devolatilizer. Volatiles are efficiently removed without degrading the polymer product. The devolatilizer includes a rotatable annular chamber having an inlet, a first outlet located at a first distance from the axis of rotation of the chamber, and a second outlet located at a second distance from the axis of rotation of the chamber. Means are also provided for supplying a polymer, in liquid form, to the inlet to the annular chamber. The portion of the chamber located between the first and second outlets forms an annular pocket or subchamber. The apparatus also includes means to rotate the annular chamber at a speed sufficient to cause the liquid polymer to flow through the first and second outlets and form liquid seals at each of the outlets. A vacuum source communicating with the annular pocket is provided for removing the volatile constituents from the liquid polymer.

REFERENCES:
patent: 1339211 (1920-05-01), McKerhan
patent: 1870113 (1932-08-01), Hawkins et al.
patent: 2921969 (1960-01-01), Loy
patent: 4030897 (1977-06-01), Pelzer et al.

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