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에탄올로 조용매로 사용한 분별 결정화에 의한 Cyclodextrin 의 분리정제
박성식,구윤모 ( Sung Sik Park,Yoon Mo Koo ) 한국화학공학회 1998 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.36 No.6
Fractional crystallization of two homologues of cyclodextrin, α-cyclodextrin and β-cyclodextrin , was tried to isolate one from the other in the mixture. A phase diagram of α-cyclodextrin, β-cyclodextrin and solvent was constucted to obtain the necessary conditions of fractional isolation of cyclodextrin mixture. β-Cyclodextrin was easily isolated from the mixture because of low solubility in water. Addition of cosolvent was tried for the isolation of α-cyclodextrin, which has relatively lower solubility in water. Among the tested cosolvents, ethanol gave the highest yield. Yields of α-cyclodextrin and β-cyclodextrin in the fractional crystallization were 55.2 % and 63.6 %, respectively, with the purities above 96 %.