“…2 -Hydroxy' -5 -(1,1,3,3 -tetramethylbutyll-cri.cP-xylenediol. Prepared from p-( 1,1,3,3-tetramethylbutyl)-phenol and formaldehyde (14). Recrystallized three times from petroleum ether; melting point 71°.…”
“…2 -Hydroxy' -5 -(1,1,3,3 -tetramethylbutyll-cri.cP-xylenediol. Prepared from p-( 1,1,3,3-tetramethylbutyl)-phenol and formaldehyde (14). Recrystallized three times from petroleum ether; melting point 71°.…”
“…In 1938, the technology of 4-TOPhs synthesis was developed in the USA. 1 The process is represented by phenol alkylation with diisobutylene (DIB) at 288−308 K in the presence of H 2 SO 4 (7% mass.). A ratio of DIB to H 2 SO 4 (7% mass) was 1:1.…”
Liquid-phase
alkylation of phenol with diisobutylenes was studied in the presence
of ion-exchange resin Amberlyst 36 Dry. Thermodynamic characteristics
were calculated for the reactions that occur in a reaction system.
Kinetics of the alkylation process was studied. The conditions of
selective synthesis were recommended for 4-tert-octylphenol.
Recommendations on the use of obtained data were given.
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