Distillation: processes – separatory – With chemical reaction
Patent
1984-05-09
1985-05-28
Smith, William F.
Distillation: processes, separatory
With chemical reaction
203 29, 203 88, 203 94, 203DIG6, 203 98, 568858, B01D 334
Patent
active
045198756
ABSTRACT:
Ethylene glycol is purified, particularly for fiber-grade applications, by removal of the residual ethylene carbonate from which the glycol was derived. The effluent from a reactor in which ethylene carbonate is hydrolyzed to ethylene glycol is distilled to produce a lower-boiling fraction comprising substantially ethylene glycol and water and a higher-boiling fraction comprising substantially ethylene glycol, higher glycols, and concentrated in hydrolysis catalyst. The higher-boiling fraction is recirculated to reflux against the lower-boiling product, thereby essentially completing the hydrolysis of unreacted ethylene carbonate thereby reducing the ethylene carbonate content of the ethylene glycol to very low levels suitable for fiber-grade applications.
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Becker Mitchell
Sachs Howard M.
Anderson Andrew J.
Long William C.
Smith William F.
Stewart Riggs T.
The Halcon SD Group, Inc.
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