Citation: Xiaxia Bai, Liuyi Pan, Peng Zhao, Daidi Fan, Wenhong Li. A new solid acid SO₄^2-/TiO₂ catalyst modified with tin to synthesize 1,6-hexanediol diacrylate[J]. Chinese Journal of Catalysis, ;2016, 37(9): 1469-1476. doi: 10.1016/S1872-2067(16)62474-9 shu

A new solid acid SO₄^2-/TiO₂ catalyst modified with tin to synthesize 1,6-hexanediol diacrylate

Xiaxia Bai ^a, ,
Liuyi Pan ^b ,
Peng Zhao ^c ,
Daidi Fan ^a ,
Wenhong Li ^a

a. School of Chemical Engineering, Northwest University, Xi'an 710069, Shaanxi, China;
b. School of Chemistry and Chemical Engineering, Baoji University of Arts and Sciences, Baoji 721013, Shaanxi, China;
c. School of Pharmacy, Shaanxi University of Chinese Medicine, Xianyang 712046, Shaanxi, China

Received Date: 11 March 2016
Revised Date: 24 May 2016

A new solid acid catalyst, SO₄^2-/TiO₂ modified with tin, was prepared using a sol-gel method and its physicochemical properties were revealed by nitrogen adsorption-desorption, X-ray powder diffraction, scanning electron microscopy, Fourier transform infrared spectroscopy, infrared spectroscopy of adsorbed pyridine, temperature-programmed desorption of ammonia and thermal gravimetric analysis. The structure, acidity and thermal stability of the SO₄^2-/TiO₂-SnO₂ catalyst were studied. Incorporating tin enlarged the specific surface area and decreased crystallite size of the SO₄^2-/TiO₂ catalyst. The total acid sites of the modified catalyst increased and Brönsted acid strength remarkably increased with increasing tin content. The decomposition temperature of sulfate radical in the modified catalyst was 100℃ greater and its mass loss was more than twice that of the SO₄^2-/TiO₂ catalyst. The SO₄^2-/TiO₂-SnO₂ catalyst was designed to synthesize 1,6-hexanediol diacrylate by esterification of 1,6-hexanediol with crylic acid. The yield of 1,6-hexanediol diacrylate exceeded 87% under the optimal reaction conditions: crylic acid to 1,6-hexanediol molar ratio=3.5, catalyst loading=7%, reaction temperature=130℃ and reaction time=3 h. The modified catalyst exhibited excellent reusability and after 10 cycles the conversion of 1,6-hexanediol was above 81%.
- Solid acid catalyst,
- Tin,
- Sol-gel method,
- 1,6-Hexanediol diacrylate,
- Esterification reaction
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A new solid acid SO42-/TiO2 catalyst modified with tin to synthesize 1,6-hexanediol diacrylate

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通讯作者: 陈斌, bchen63@163.com

A new solid acid SO₄^2-/TiO₂ catalyst modified with tin to synthesize 1,6-hexanediol diacrylate