Purification of solvents used for the purification of...

Details Purification of solvents used for the purification of... Purification of solvents used for the purification of...

2007-02-27

2007-02-27

Bhat, N. (Department: 1764)

Distillation: processes, separatory

With disparate physical separation

Utilizing solid sorbent

C203S064000, C203S067000, C210S638000, C210S650000, C210S669000, C210S195200, C210S241000, C568S872000

Reexamination Certificate

active

10421367

ABSTRACT:
This invention concerns a process for removing carbonyl-containing impurities from impure extractive distillation solvent such as a glycol, comprising: contacting the impure extractive distillation solvent with an acidic ion exchange resin. The purified extractive distillation solvent can be recycled for use as a solvent in an extractive distillation process that removes impurities from alkylene oxide. The extractive distillation solvent can be ethylene glycol monomethyl ether (EGME) used to purify propylene oxide.

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