Distillation: processes – separatory – And recovering heat by indirect heat exchange – Utilizing recovered heat for heating feed
Patent
1981-09-29
1983-09-27
Bascomb, Jr., Wilbur L.
Distillation: processes, separatory
And recovering heat by indirect heat exchange
Utilizing recovered heat for heating feed
203 14, 203 77, 203 88, 203 92, 203100, 203 68, 203 69, 203 70, 159 2R, 159 16R, 159 24A, 159 46, 159 471, 528500, B01D 114, B01D 306, C08F 610
Patent
active
044067500
ABSTRACT:
The energy requirements of a solution rubber process are significantly improved by employing solvent which has been removed in subsequent process steps.
The invention concerns the separation treatment of the solvents and the polymer solutions produced by solution polymerization. In one embodiment a polymer solution is flashed to remove solvent vapor overhead and a concentrated polymer solution is removed as bottoms. The flashed solvent vapor is divided into at least two streams. A first stream is used as a stripping vapor medium in a zone for stripping a wet solvent to recover a wet solvent vapor overhead from the stripping zone and a dry solvent liquid as bottoms; the second flashed solvent vapor stream is used to preheat the wet solvent feed to the stripping zone by indirect contact heat exchange; a third portion of said solvent vapor can be combined with the second portion downstream of the heat exchange step, and the combined stream can be condensed.
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Bascomb, Jr. Wilbur L.
Phillips Petroleum Company
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