Method of purifying long-chain alkyl phenols and Mannich...

Details Method of purifying long-chain alkyl phenols and Mannich... Method of purifying long-chain alkyl phenols and Mannich...

2008-04-08

2008-04-08

Eyler, Yvonne (Department: 1621)

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

Organic compounds

Oxygen containing

Reexamination Certificate

active

10475214

ABSTRACT:
A process for purifying a phenol derivative selected from alkylphenols having a number average molecular weight of from 200 to 4 000 and Mannich adducts thereof is described, in which the phenol derivative is brought into intimate contact with an extracting agent having a polarity ET(30) of from 57 to 38 kcal/mol, a phase containing the phenol derivative and an extracting agent phase are allowed to separate from one another and the extracting agent phase is removed.

REFERENCES:
patent: 3368972 (1968-02-01), Otto
patent: 3904595 (1975-09-01), Plonsker et al.
patent: 4101590 (1978-07-01), Sato et al.
patent: 7712270 (1977-11-01), None
Chem. Rev., Reichardt, 1994, vol. 94, pp. 2319-2358.
Additive für Ottokraftstoffe, Rossenbeck,223-229, 1978.

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