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Citation:
ZHU Jun-Feng, ZHANG Guang-Hua, LI Nan, GAO Jian-Cai. Dry Preparation Process of Carboxymethyl-β-cyclodextrin[J]. Chinese Journal of Applied Chemistry,
;2008, 25(6): 681-684.
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Carboxymethyl-β-cyclodextrin (CM-β-CD) was separately prepared by dry process and wet process.CM-β-CD was characterized by Fourier transform infrared spectrometry (FTIR),and then its solubi-lity,degree of substitution,reaction energy and yield were determined.The results show that reaction effect of dry process is from 37% to 46%,while yield of about 83%.The dry process has a higher reaction energy and a higher yield than the wet process.The optimum conditions of the dry preparation are the mole ratio of chloroacetic acid to β-cyclodextrin is 6,reaction temperature is 40℃,reaction time is 4 h.
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