Tripropylene glycol production

Details Tripropylene glycol production Tripropylene glycol production

2005-08-09

2005-08-09

Keys, Rosalynd (Department: 1621)

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

Organic compounds

Oxygen containing

C568S679000, C568S680000

Reexamination Certificate

active

06927310

ABSTRACT:
A method for forming multiple tripropylene glycol products of acrylate grade comprising forming a composition of dipropylene glycol, tripropylene glycol, tetrapropylene glycol and heavier, and at least one aldehyde, separating from said composition tripropylene glycol containing aldehyde, mixing with the thus separated tripropylene that contains aldehyde an aldehyde controlling additive to form a first individual tripropylene glycol product that contains glycol controlling additive and has an aldehyde content below that required for acrylate grade tripropylene glycol, separating from the remainder of the composition a tripropylene glycol concentrate, adding an aldehyde controlling additive to the concentrate, and separating from the concentrate a second individual tripropylene product that has an aldehyde content below that required for acrylate grade tripropylene glycol and is free of aldehyde controlling additive.

REFERENCES:
patent: 2683721 (1954-07-01), Schlesinger et al.
patent: 3213113 (1965-10-01), Randall et al.
patent: 3989740 (1976-11-01), Broussard et al.
patent: 5672768 (1997-09-01), Gupta et al.

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