ASTM_D_4072_-_98_2018.pdf

Designation:D407298(Reapproved 2018)Standard Test Method forToluene-Insoluble(TI)Content of Tar and Pitch1This standard is issued under the fixed designation D4072;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.Scope1.1 This test method covers the determination of toluene-insoluble matter(TI)in tar and pitch.1.2 Since this test method is empirical,strict adherence toall details of the procedure is necessary.1.3 The values stated in SI units are to be regarded asstandard.No other units of measurement are included in thisstandard.1.4 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 hazard information,see Section 7.1.5 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:2D95 Test Method for Water in Petroleum Products andBituminous Materials by DistillationD362 Specification for Industrial Grade Toluene(Withdrawn1989)3D850 Test Method for Distillation of Industrial AromaticHydrocarbons and Related MaterialsD4296 Practice for Sampling PitchE11 Specification for Woven Wire Test Sieve Cloth and TestSieves3.Summary of Test Method3.1 The sample is digested,then extracted with hot toluenein an alundum thimble.The insoluble matter is dried andweighed.4.Significance and Use4.1 This test method is useful for evaluating and character-izing tars and pitches and as one element in establishing theuniformity of shipments or sources of supply.5.Apparatus5.1 Extraction Apparatus,Flask with metal cap condenseras shown in Fig.1.5.2 Extraction Thimble,Alundum AN 485 coarse(formerlyRA 98),30 mm in diameter by 80 mm in height with flatbottom.5.3 Thimble Cover,Paper cone,made by wetting with watera 70 mm filter paper normally folded in a small glass funnel,and drying the funnel in an oven with the paper cone in place.5.4 Sieves,U.S.Standard 600 m(No.30)and 250 m(No.60),conforming to Specification E11.5.5 Heater,having a minimum capacity of 300 W per unit.6.Reagents6.1 Toluene,Industrial Pure,meeting Specification D362.(WarningFlammable.)6.2 ConcentratedHydrochloricAcid.(WarningCorrosive.)7.Hazards7.1 Since toluene is a toxic and flammable substance,allworking areas should be efficiently hooded and kept free ofsparks and flames.7.2 Observe proper laboratory procedures for handling anddiluting hydrochloric acid.8.Bulk Sampling8.1 Samples from shipments shall be taken in accordancewith Practice D4296,and shall be free of foreign substances.Thoroughly mix the sample immediately before removing arepresentative portion for the determination or for dehydration.1This test method is under the jurisdiction of ASTM Committee D02 onPetroleum Products,Liquid Fuels,and Lubricants and is the direct responsibility ofSubcommittee D02.05 on Properties of Fuels,Petroleum Coke and Carbon Material.Current edition approved Dec.1,2018.Published December 2018.Originallyapproved in 1981.Last previous edition approved in 2003 as D4072 98(2013).DOI:10.1520/D4072-98R18.2For 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.Copyright 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 9.Dehydration of Sample9.1 Hard PitchIf the solid bulk sample contains freewater,air-dry a representative portion in a forced draft oven at50 C.9.2 Soft PitchIf the presence of water is indicated bysurface foam on heating,maintain a representative portion ofthe bulk sample of a temperature between 125 C and 150 Cin an open container until the surface is free of foam.Take carenot to overheat,and remove heat source immediately whenfoam subsides.9.3 TarDehydrate a representative portion of the bulksample at atmospheric pressure using a simple sidearm distil-lation apparatus si