环己酮与酚类化合物二元系的固液相平衡

Solid and Liquid Phase Equilibria in Binary Mixtures of Cyclohexanone with Cresols

测制了ｘＣ６Ｈ１０Ｏ＋（１－ｘ）ｏ－ＣＨ３Ｃ６Ｈ４ＯＨ和ｘＣ６Ｈ１０Ｏ＋（１－ｘ）ｍ－ＣＨ３Ｃ６Ｈ４ＯＨ固液平衡相图，此体系均形成１１固体化合物，化合物熔点分别为２４１．００和２６１．６０Ｋ．２个体系都由２个低共熔点组成．前１个体系的低共熔点组成和温度分别为ｘ＝０．３９７，Ｔ＝２３２．５４Ｋ和ｘ＝０．７９４，Ｔ＝２１０．２６Ｋ，后１个体系为ｘ＝０．２４４，Ｔ＝２４４．７５Ｋ和ｘ＝０．９２７，Ｔ＝２１９．１９Ｋ．测得环己酮的晶型转变温度为２２０．２４Ｋ．可认为化合物是由于甲酚中羟基氢原子与环己酮中羰基氧原子通过氢键作用而形成．

Solid+liquid) phase diagrams were constructed for cyclohexanone+ o cresol,or m cresol,solid addition compounds form with the empirical formula: o CH 3C 6H 4OH·C 6H 10 O, m CH 3C 6H 4OH·C 6H 10 O, T mp of the compounds are 241 00 and 261 60 K,respectively.The eutectics are at x=0 397,T=232 54 K and x=0 794,T=210 26 K in x C 6H 10 O+(1- x)o CH 3C 6H 4OH. The eutectics are at x=0 244,T=244 75 K and x=0 927,T=219 19 K in x C 6H 10 O+(1- x)m CH 3C 6H 4OH.The solid phase transition temperature for C 6H 10 O is 220 24 K.Compound formation is attributed to hydrogen bonding between the carbonyl oxygen in cyclohexanone and hydroxyl hydrogens in phenol.