Designation: D5236 − 17Standard Test Method forDistillation of Heavy Hydrocarbon Mixtures (Vacuum PotstillMethod) 1This standard is issued under the f i xed designation D5236; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon (´) indicates an editorial change since the last revision or reapproval.1. Scope*1.1 This test method covers the procedure for distillation ofheavy hydrocarbon mixtures having initial boiling pointsgreater than 150 °C (300 °F), such as heavy crude oils,petroleum distillates, residues, and synthetic mixtures. It em-ploys a potstill with a low pressure drop entrainment separatoroperated under total takeoff conditions. Distillation conditionsand equipment performance criteria are specif i ed and typicalapparatus is illustrated.1.2 This test method details the procedures for the produc-tion of distillate fractions of standardized quality in the gas oiland lubricating oil range as well as the production of standardresidue. In addition, it provides for the determination ofstandard distillation curves to the highest atmospheric equiva-lent temperature possible by conventional distillation.1.3 The maximum achievable atmospheric equivalent tem-perature (AET) is dependent upon the heat tolerance of thecharge. For most samples, a temperature up to 565 °C(1050 °F) can be attained. This maximum will be signif i cantlylower for heat sensitive samples (for example, heavy residues)and might be somewhat higher for nonheat sensitive samples.1.4 The recommended distillation method for crude oils upto cutpoint 400 °C (752 °F) AET is Test Method D2892. Thistest method can be used for heavy crude oils with initial boilingpoints greater than 150 °C (302 °F). However, distillationcurves and fraction qualities obtained by these methods are notcomparable.1.5 This test method contains the following annexes:1.5.1 Annex A1—Test Method for Determination of Tem-perature Response Time,1.5.2 Annex A2—Practice for Calibration of Sensors,1.5.3 Annex A3—Test Method for Dehydration of a WetSample of Oil,1.5.4 Annex A4—Practice for Conversion of Observed Va-por Temperature to Atmospheric Equivalent Temperature(AET), and1.5.5 Annex A5—Test Method for Determination of Wet-tage.1.6 The values stated in SI units are to be regarded as thestandard. The values given in parentheses are for informationonly.1.7 This standard does not purport to address all of thesafety concerns, if any, associated with its use. It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use. For specif i cwarnings, see 6.5.4.2, 6.5.6.3, 6.9.3, 9.5, 9.7, and A2.3.1.3.1.8 WARNING—Mercury has been designated by manyregulatory agencies as a hazardous material that can causecentral nervous system, kidney, and liver damage. Mercury, orits vapor, may be hazardous to health and corrosive tomaterials. Caution should be taken when handling mercury andmercury containing products. See the applicable product Ma-terial Safety Data Sheet (MSDS) for details and EPA’swebsite—http://www.epa.gov/mercury/faq.htm—for addi-tional information. Users should be aware that selling mercuryand/or mercury containing products into your state or countrymay be prohibited by law.1.9 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards, Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade (TBT) Committee.2. Referenced Documents2.1 ASTM Standards: 21 This test method is under the jurisdiction of ASTM Committee D02 onPetroleum Products, Liquid Fuels, and Lubricants and is the direct responsibility ofSubcommittee D02.08 on Volatility.Current edition approved May 1, 2017. Published May 2017. Originallyapproved in 1992. Last previous edition approved in 2013 as D5236 – 13. DOI:10.1520/D5236-17.2 For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at service@astm.org. For Annual Book of ASTMStandards volume information, refer to the standard’s Document Summary page onthe ASTM website.*A Summary of Changes section appears at the end of this standardCopyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.1 Copyright by ASTM Int'l (all rights reserved); Sat Oct 7 00:15:08 EDT 2017Downloaded/printed byUniversity of Edinburgh (University of Edinburgh) pursuant to License Agreement. No further reproductions authorized.
