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。
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% and 30%, 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.
出处
《华东理工大学学报（自然科学版）》
CAS
CSCD
北大核心
2014年第3期286-291,301,共7页
Journal of East China University of Science and Technology
关键词
低熔点蜡
正构烷烃
固-固转变
晶体结构
low-melting wax
n-alkanes
solid-solid transition
crystal structure
