ASTM_D_2593_-_19.pdf

Designation:D259319Standard Test Method forButadiene Purity and Hydrocarbon Impurities by GasChromatography1This standard is issued under the fixed designation D2593;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 determination of butadiene-1,3 purity and impurities such as propane,propylene,isobutane,n-butane,butene-1,isobutylene,propadiene,trans-butene-2,cis-butene-2,butadiene-1,2,pentadiene-1,4,and,methyl,dimethyl,ethyl,and vinyl acetylene in polymerizationgrade butadiene by gas chromatography.Impurities includingbutadiene dimer,carbonyls,inhibitor,and residue are measuredby appropriate ASTM procedures and the results used tonormalize the component distribution obtained by chromatog-raphy.NOTE1Other impurities present in commercial butadiene must becalibrated and analyzed.Other impurities were not tested in the coopera-tive work on this test method.NOTE2This test method can be used to check for pentadiene-1,4 andother C5s instead of Test Method D1088.1.2 The values stated in SI units are to be regarded asstandard.No other units of measurement are included in thisstandard.1.3 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 environmental practices and deter-mine the applicability of regulatory limitations prior to use.For specific warning statements,see 6.1 and 9.3.1.4 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Documents2.1 ASTM Standards:2D1088 Method of Test for Boiling Point Range ofPolymerization-Grade Butadiene(Withdrawn 1983)32.2 Energy Institute Standards:4IP 194 Analysis of Butadiene-1,3 Polymerization Grade3.Summary of Test Method3.1 A representative sample is introduced into a gas-liquidpartition column.The butadiene and other components areseparated as they are transported through the column by aninert carrier gas.Their presence in the effluent is measured bya detector and recorded as a chromatogram.The chromatogramof the sample is interpreted by applying component attenuationand detector response factors to the peak areas or peak heightsand the relative concentration determined by relating indi-vidual peak response to total peak response.Impurities includ-ing butadiene dimer,carbonyls,inhibitor,and residue aremeasured by appropriate ASTM procedures and the resultsused to normalize the distribution obtained by gas chromatog-raphy.4.Significance and Use4.1 The trace hydrocarbon compounds listed can have aneffect in the commercial use of butadiene.This test method issuitable for use in process quality control and in settingspecifications.5.Apparatus5.1 ChromatographAny chromatograph having either athermal-conductivity or flame ionization detector can be used1This test method is under the jurisdiction of ASTM Committee D02 onPetroleum Products,Liquid Fuels,and Lubricants and is the direct responsibility ofSubcommittee D02.D0.04 on C4 and C5 Hydrocarbons.This test method was adopted as a joint ASTM-IP Standard,IP 194,in 1972.Current edition approved Dec.1,2019.Published January 2020.Originallyapproved in 1967.Last previous edition approved in 2014 as D2593 93(2014).DOI:10.1520/D2593-19.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.3The last approved version of this historical standard is referenced onwww.astm.org.4Obsolete.Contact Energy Institute,61 New Cavendish St.,London,WIG 7AR,U.K.,http:/www.energyinst.org.uk.*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.provided the system has sufficient sensitivity and stability toobtain a recorder deflection of at least 2 mm at signal-to-noiseratio of at least 5:1 for 0.01%by mass of impurity.5.2 ColumnAny column can be used that is capable ofresolving the components listed in 1.1 with the exception ofbutene-1 and isobutylene,which can