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R. D. Stipanovic, D. W. Altman, D. L. Begin, G. A. Green- blatt and J. H. Benedict, “Terpenoid Aldehydes in Upland Cottons: Analysis by Aniline and HPLC Methods,” Jour- nal of Agri-cultural and Food Chemistry, Vol. 36, No. 3, 1988, pp. 509-515. doi:10.1021/jf00081a026

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• TITLE: Synthesis, Characterization and Application of ZS/HMS Catalyst in the Esterification of Gossypol

  AUTHORS: Shihong Dong, Mingyuan Zhu, Bin Dai

  KEYWORDS: Gossypol; Zirconium Sulphate; Hexagonal Mesoporous Silica; Esterification

  JOURNAL NAME: Green and Sustainable Chemistry, Vol.2 No.1, February 17, 2012

  ABSTRACT: A solid acid catalyst of zirconium sulfate (ZS) on a pure hexagonal mesoporous silica (HMS) sieve was prepared and characterized by small angle X-ray diffraction, NH3-temperature programmed desorption, and thermogravimetric analysis. The obtained ZS/HMS catalyst displayed a typical mesoporous structure, ZS was well dispersed on the HMS support, and the acidity increased with the amount of ZS loading. Gossypol was extracted from cottonseed cake with acetone as solvent, and then the gossypol solution was esterified with ZS/HMS as catalyst to yield products of acetic acid gossypol. Under the optimal conditions, the conversion efficiency of gossypol was as high as 96.7%.