【摘要】 采用气相色谱法(GC)、差示扫描量热法(DSC)和X射线衍射法(XRD)等手段,研究了南阳常三线、常四线、减一线、减二线蜡下油和减三线蜡下油经酮苯脱蜡、脱油得到的5种蜡(A、B、C、D、E)的组成和晶体结构。结果表明:蜡A、B、C中正构烷烃质量分数在90%以上,蜡D、E中正构烷烃质量分数分别为65%和30%左右。蜡B出现1个固-固转变,蜡A、C、D、E存在2个固-固转变。在常温下,蜡B为正交晶体,蜡A、D、E为六方晶体,蜡C为正交晶体与六方晶体两相共存。更多还原

【Abstract】 The composition and crystal structure of five petroleum waxes(A、B、C、D、E)obtained from Nanyang 3rd and 4th atmospheric side-cut,1st vacuum side-cut,2nd and 3rd vacuum side-cut foots oils by ketone-benzol dewaxing and deoiling process respectively were analyzed using gas chromatography(GC),differential scanning calorimetry(DSC)and X-ray diffraction(XRD).Results showed that the mass fractions of n-alkanes in waxes A,B and C were above 90%,while in waxes D,E were about 65% and30%,respectively.Wax B showed one solid-solid transition while waxes A,C,D and E showed two.At room temperature,the crystallization structure was orthorhombic for wax B,hexagonal for waxes A,D and E,and both orthorhombic and hexagonal two-phase coexisted for wax C.更多还原