Purification of propylene glycol monoalkyl ether

Details Purification of propylene glycol monoalkyl ether Purification of propylene glycol monoalkyl ether

2008-01-14

2008-10-21

Price, Elvis O (Department: 1621)

Organic compounds -- part of the class 532-570 series

Organic compounds

Oxygen containing

Reexamination Certificate

active

07439405

ABSTRACT:
The invention is a method of purifying a propylene glycol monoalkyl ether containing carbonyl impurities which comprises contacting the propylene glycol monoalkyl ether stream in the liquid phase with a carbon adsorbent, and recovering a purified propylene glycol monoalkyl ether product. The purification method improves product quality and reduces the amount of carbonyl impurities in the propylene glycol monoalkyl ether.

REFERENCES:
patent: 2327053 (1943-08-01), Marple et al.
patent: 271169 (1927-05-01), None

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