Process for alkylating phenolic compounds to produce ortho- and

Details Process for alkylating phenolic compounds to produce ortho- and Process for alkylating phenolic compounds to produce ortho- and

1978-06-15

1980-07-29

Lone, Werren B.

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

Organic compounds

Oxygen containing

568780, 568799, C07C 3720

Patent

active

042152291

ABSTRACT:
Ortho- and para-monoalkylated phenols and 2,4- and 2,6-dialkylphenols can be produced from phenolic compounds in good yields. The phenolic compound is reacted with an aldehyde having one to ten carbon atoms and a secondary aliphatic amine having a basic dissociation constant, pK.sub.b, of less than about 3.6 measured at 25.degree. C. The reaction is conducted in the liquid phase with at least a stoichiometric amount of the phenolic compound, the aldehyde and the secondary amine, or with an excess of the phenolic compound with the stoichiometric amounts of the aldehyde and the secondary amine. The reaction is conducted at a temperature in the range of around 0.degree. C. to about 25.degree. C., and the reaction produces an aminoalkylated phenol. The aminoalkylated phenol is contacted with hydrogen in the presence of a metal catalyst at a temperature of about 120.degree. C. to about 140.degree. C. at a hydrogen pressure not greater than 150 psi to produce a mixture of ortho-monoalkylphenol, para-monoalkylphenol and 2,4- and 2,6-alkylphenol. These compounds are separated to produce ortho-monoalkylphenol, para-monoalkylphenol, 2,4-dialkylphenol and 2,6-dialkylphenol.

REFERENCES:
patent: 2194215 (1940-03-01), Bruson et al.
patent: 2841623 (1958-07-01), Norton et al.
patent: 3394399 (1968-07-01), Bajer et al.
patent: 3461722 (1969-08-01), Previc
patent: 3592951 (1971-07-01), Zoweski
patent: 3919332 (1975-11-01), Wollensak
patent: 3946086 (1976-03-01), Gershanov et al.

Affiliated with

Also associated with

Rating

Process for alkylating phenolic compounds to produce ortho- and does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Process for alkylating phenolic compounds to produce ortho- and , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for alkylating phenolic compounds to produce ortho- and will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-905763