The titanium sulfate catalyst was prepared by calcination at 400～500 ℃. IR spectra of pyridine adsorption showed the presence of Brnsted acid sites on its surface. The catalysts had good activity in ketalization b...The titanium sulfate catalyst was prepared by calcination at 400～500 ℃. IR spectra of pyridine adsorption showed the presence of Brnsted acid sites on its surface. The catalysts had good activity in ketalization between cyclohexanone and 1,2-propanediol with yield being 89% in reaction conditions:molar ratio of cyclohexanone to 1,2-propanediol 1∶1 3, catalyst amount 4% based on the mass of cyclohexanone, 140 ℃ and 50～75 min. In esterification of succinic acid with butanol the yield of dibutyl succinate was 97%. The catalyst could be reused through regeneration.展开更多
In this paper a new solid superacid catalyst SO 2- 4 MoO 3 TiO 2 was prepared.The activity of the catalyst in esterification of acetic acid and iso amyl alcohol was measured and compared with that of SO 2- 4 TiO 2 and...In this paper a new solid superacid catalyst SO 2- 4 MoO 3 TiO 2 was prepared.The activity of the catalyst in esterification of acetic acid and iso amyl alcohol was measured and compared with that of SO 2- 4 TiO 2 and MoO 3 TiO 2.The results showed that SO 2- 4 MoO 3 TiO 2 had better catalytic performance than SO 2- 4 TiO 2 and MoO 3 TiO 2.There was evident coordination between MoO 3 and SO 2- 4 when they coexisted on TiO 2.展开更多
文摘The titanium sulfate catalyst was prepared by calcination at 400～500 ℃. IR spectra of pyridine adsorption showed the presence of Brnsted acid sites on its surface. The catalysts had good activity in ketalization between cyclohexanone and 1,2-propanediol with yield being 89% in reaction conditions:molar ratio of cyclohexanone to 1,2-propanediol 1∶1 3, catalyst amount 4% based on the mass of cyclohexanone, 140 ℃ and 50～75 min. In esterification of succinic acid with butanol the yield of dibutyl succinate was 97%. The catalyst could be reused through regeneration.
文摘In this paper a new solid superacid catalyst SO 2- 4 MoO 3 TiO 2 was prepared.The activity of the catalyst in esterification of acetic acid and iso amyl alcohol was measured and compared with that of SO 2- 4 TiO 2 and MoO 3 TiO 2.The results showed that SO 2- 4 MoO 3 TiO 2 had better catalytic performance than SO 2- 4 TiO 2 and MoO 3 TiO 2.There was evident coordination between MoO 3 and SO 2- 4 when they coexisted on TiO 2.
