Li En-b
2013
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Journal
Bulletin of the Chinese ceramic society
Abstract
Solid acids Ga2(SO4)3-attapulgite catalyst was prepared by Ga2(SO4)3 and attapulgite. The samples were characterized by IR and XRD. Suitable preparation conditions,catalyst activity,stability and kinetics character were studied in synthesis of heptyl 4-hydroxybenzoate. The results showed the suitable catalyst preparing conditions were that consistency of sulfuric acid is 8%,Ga2(SO4)3 loading is 25%,and calcinations at 300 ℃ for 2. 5 h. The average of yield is 92. 1%,and it above 84. 0% after 5 times in the perfect synthesis condition. The kinetics study showed that it is second order reaction,the apparent activation energy is 93. 90 kJ/ mol.