Production of para-alkylphenols or para-cycloalkylphenols

    公开(公告)号:GB906219A

    公开(公告)日:1962-09-19

    申请号:GB376361

    申请日:1961-02-01

    Applicant: BASF AG

    Abstract: Para-alkyl or -cycloalkyl phenols are obtained by reacting a phenol unsubstituted in the p- and in at least one o-position with a C3-20 alkene or cycloalkene in presence of 0.1-10% wt. ZnCl2 and 0.1-3% wt. HCl (with reference to the phenol) at between 50 and 150 DEG C., the phenol and alkene or cycloalkene being reacted in stoichiometric amounts or up to 5% mol excess of one of the reagents. The examples describe the preparation of p-t-butyl, -nonyl, i-octyl and -cyclohexyl phenols and p-t-butyl-o-cresol. Specific phenols listed are phenol; o- and m-cresols and m-xylenols; o-i-butyl, o-dodecyl, 2:5-dibutyl and 2:3-diethylphenols; o- and m-chloro and -bromophenols; 2:3- and 2:5-dichloro and -dibromophenols; salicylic acid, its ethyl ester and 2-methyl-5-nitrophenol; a -naphthol and its m-methyl, -butyl, -chloro and -nitro derivatives. Alkenes mentioned are butenes-1 and -2, and isobutene; the 2-methyl derivatives of butene-2, pentene-1 and 3:4- and 4:4-dimethylpentene-2; nonene-1, undecene-1, dodecene-6, octadecene-1, cyclohexene, cyclo-octene and methylcyclohexene-1.

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