1、Designation:D523618aStandard Test Method forDistillation of Heavy Hydrocarbon Mixtures(Vacuum PotstillMethod)1This standard is issued under the fixed designation D5236;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last
2、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 1
3、50 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 specified and typicalapparatus is illu
4、strated.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 atm
5、ospheric 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 significantlylower for he
6、at 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 tha
7、n 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 A1Test Method for Determination of Tem-perature Response Time,1.5.2 Annex A2Practice for Calibration of Sensors,1.5.3 Annex A3T
8、est Method for Dehydration of a WetSample of Oil,1.5.4 Annex A4Practice for Conversion of Observed Va-por Temperature to Atmospheric Equivalent Temperature(AET),and1.5.5 Annex A5Test Method for Determination of Wet-tage.1.6 The values stated in SI units are to be regarded asstandard.The values given
9、 in parentheses after SI units areprovided for information only and are not considered standard.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,health,and envi
10、ronmental practices and deter-mine the applicability of regulatory limitations prior to use.For specific warnings,see 6.5.4.2,6.5.6.3,6.9.3,9.5,9.7,andA2.3.1.3.1.8 WARNINGMercury has been designated by manyregulatory agencies as a hazardous substance that can causeserious medical issues.Mercury,or i
11、ts vapor,has been dem-onstrated to be hazardous to health and corrosive to materials.Use Caution when handling mercury and mercury-containingproducts.See the applicable product Safety Data Sheet(SDS)for additional information.The potential exists that sellingmercury or mercury-containing products,or
12、 both,is prohibitedby local or national law.Users must determine legality of salesin their location.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 Internationa
13、l Standards,Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:21This test method is under the jurisdiction of ASTM Committee D02 onPetroleum Products,Liquid Fuels,and Lubricants and is the direct respo
14、nsibility ofSubcommittee D02.08 on Volatility.Current edition approved July 1,2018.Published July 2018.Originally approvedin 1992.Last previous edition approved in 2018 as D5236 18.DOI:10.1520/D5236-18A.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Servic
15、e at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards 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.Uni
16、ted 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 D941 Test Method for Density and Relative Density(Spe-cific Gravity)of Liquids by Lipkin Bicapillary Pycnom-eter(Withdrawn 1993)3D1217 Test Method for Density and Relative De