加拿大油砂沥青喷雾造粒溶剂体系的选择.pdf

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1、石油学报(石油加工)2012年10月ACTAPETROIEISIN1CA(PETROLEUMPROCESSINGSECTION)第28卷第5期文章编号：1001—8719(2012)05—078308加拿大油砂沥青喷雾造粒溶剂体系的选择范勐，孙学文，赵锁奇，许志明(中国石油大学重质油国家重点实验室，北京102249)摘要：以正戊烷+正己烷、正戊烷+环戊烷2个系列混合物作为溶剂，采用溶剂沉淀法从加拿大油砂沥青中得到沥青质，通过对沥青质SARA族组成、元素组成、平均分子结构、分子片层堆积结构的测定，考察了溶剂混合比例对所得

2、沥青质性质的影响。结果表明，随着正己烷或环戊烷掺人比例的增加，沥青质的收率显著降低，软化点明显提高；正戊烷+环戊烷混合溶剂更适宜作为加拿大油砂沥青喷雾造粒的溶剂体系，正戊烷中加入少量的环戊烷就能达到沥青喷雾造粒的要求。在正戊烷中掺人体积分数1O的环戊烷，可将脱油沥青收率降低4百分点，软化点相应升高1O～12℃，从而生产出外观形态良好的沥青粉，可以作为加拿大油砂沥青喷雾造粒的溶剂体系。关键词：油砂沥青；溶剂选择；正戊烷；正己烷；环戊烷；沥青质中图分类号：TE624文献标识码：Adoi：10．3969／j．issn．100

3、1—8719．2O12．05．013SolventSelectionforAsphaltParticlesProductionofCanadianOilSandsBitumenFANMeng，SUNXuewen，ZHAOSuoqi，XUZhiming(StateKeyLaboratoryofHeavyOilProcessing，ChinaUniversityofPetroleum，Beijing102249，China)Abstract：AsphaltenesfromCanadianoilsandsbitumenwer

4、eobtainedbysolventprecipitationwithtwomixedsolventsystems，—pentane+一hexanemixedsolventand一pentane+cyclopentanemixedsolvent．Severalanalyticalmeanswereconductedtostudythevariationofasphaltenepropertieswiththesolventchanging，suchassaturate，aromatic，resinandasphalte

5、necompositions，elementalcomposition，averagemolecularstructuresandaromaticsheetsstackingstructures．Theexperimentresultsindicatedthattheyieldofasphaltenecouldberemarkablereducedwiththeincreaseof一hexaneorcyclopentaneproportioninthemixedsolventandthesofteningpointof

6、asphalteneincreasedcorrespondingly．Whenthe一pentane+cyclopentanemixedsolventwasusedwithasmallamountofcyclopentanein，z—pentane．thesofteningpointofasphaltenecouldmeetthedemandforasphaltspraygranulationandthe—pentaneq-cyclopentanemixedsolventwassuitabletobethesolven

7、tsystemintheasphaltparticlesproductionfromCanadianoilsandsbitumen．The—pentane-4-cyclopentanemixedsolventcontainingabout10cyclopentanecoulddecreasetheyieldofdeoiledasphaltby4percentandpromotethesofteningpointofasphaltby10—12℃．Hence，niceasphaltparticlescouldbeprod

8、uced，andthe—pentaneq-cyclopentanemixedsolventwith10cyclopentanewouldbetherightcandidatesolventsystemforCanadianoilsandsbitumenprocessing．Keywords：oilsandsbitumen；solv