J. Kubo, EFFECTS OF THERMAL PRETREATMENT (REMOVAL OF STERIC HINDRANCE) ON SUBSEQUENT NUCLEAR HYDROGENATION OF HEAVY ALKYLAROMATICS, Industrial & engineering chemistry research, 35(1), 1996, pp. 288-294
The changes in structures by thermal pretreatment of heavy alkylaromat
ics, which are very difficult to nuclear hydrogenate, and the effects
of the pretreatment on subsequent nuclear hydrogenation were investiga
ted in comparison with catalytic pretreatment of the same feedstock. T
he following results were obtained: (1) the structures of the thermall
y pretreated products are quite different from those of the catalytica
lly pretreated ones; (2) subsequent nuclear hydrogenation of the therm
ally pretreated products becomes much easier because the steric hindra
nce is removed; (3) in the case where the same feedstock was catalytic
ally pretreated, the products were difficult to nuclear hydrogenate. T
hese results suggest various applications, including heavy oil hydrotr
eating.