Process for the preparation of liquid mixtures of alkylated 2-(2

Details Process for the preparation of liquid mixtures of alkylated 2-(2 Process for the preparation of liquid mixtures of alkylated 2-(2

1988-12-14

1990-05-01

Daus, Donald G.

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

C07D24920

Patent

active

049219669

ABSTRACT:
A process for the preparation of a mixture of 2-(2-hydroxyphenyl)benzotriazole which is liquid at room temperature by alkylating 2-(2-hydroxy-5-methylphenyl)benzotriazole with a C.sub.8 -C.sub.14 .alpha.-olefin in the melt at elevated temperature, in the presence of sulfonic acid as catalyst, comprising using not less than 0.5 mol of the acid catalyst and 1.5-3 mol of .alpha.-olefin per mol of 2-(2-hydroxy-5-methylphenyl)benzotriazole, carrying out the alkylation in the temperature range from 165.degree. to 190.degree. C., separating the crude product phase upper phase) from the sulfonic acid phase, and working up said crude product phase by distillation by means of a thin-film evaporator, a thin-film evaporator fitted with a distillation column, or a short path distillation apparatus.

REFERENCES:
patent: Re29546 (1978-03-01), Strobel
patent: 3004896 (1961-10-01), Heller et al.
patent: 3055896 (1962-09-01), Boyle et al.
patent: 3072585 (1963-01-01), Millonis et al.
patent: 3074910 (1963-01-01), Dickson, Jr.
patent: 3159646 (1964-12-01), Millionis et al.
patent: 3189615 (1965-06-01), Heller et al.
patent: 3230194 (1966-01-01), Boyle et al.
patent: 3399173 (1968-08-01), Heller
patent: 3983132 (1976-09-01), Strobel
patent: 4096242 (1978-06-01), Strobel
patent: 4129521 (1978-12-01), Strobel
patent: 4278590 (1981-07-01), Dexter et al.
patent: 4283327 (1981-08-01), Dexter et al.
patent: 4383863 (1983-05-01), Dexter et al.
patent: 4587346 (1986-05-01), Winter et al.
patent: 4675352 (1987-06-01), Winter et al.
patent: 4845180 (1989-07-01), Henry et al.
Chem. Abstracts vol. 102, entry 95578f, (1985).

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