ASTM_D_2001_-_07_2012.pdf

Designation:D200107(Reapproved 2012)Standard Test Method forDepentanization of Gasoline and Naphthas1This standard is issued under the fixed designation D2001;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 removal of pentanes andlighter hydrocarbons from gasolines,naphthas,and similarpetroleum distillates to prepare samples suitable for the deter-mination of hydrocarbon types in accordance with Test MethodD2789.In addition,this test method determines the volumepercent of bottoms remaining after depentanization.1.2 The values stated in SI units are to be regarded asstandard.The values given in parentheses are for informationonly.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 and health practices and determine the applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2D1250 Guide for Use of the Petroleum Measurement TablesD2789 Test Method for Hydrocarbon Types in Low OlefinicGasoline by Mass Spectrometry3.Summary of Test Method3.1 A 50-mL sample is distilled into an overhead(C5andlighter)fraction and a bottoms(C6and heavier)fraction.Thevolume of bottoms is measured and the volume percent,basedon the charge,is calculated.4.Significance and Use4.1 The presence of pentane and lighter hydrocarbons ingasolines,naphthas,and similar petroleum distillates interferesin Test Method D2789.Pentane and lighter hydrocarbons areseparated by this test method so that the depentanized residuecan be analyzed and so the pentane and lighter hydrocarbonscan be analyzed by other methods,if desired.4.2 Under the conditions specified in the test method someC5and lighter hydrocarbons remain in the bottoms,and someC6and heavier hydrocarbons carry over to the overhead.Expressed as volume percent of charge,the amounts aretypically 2%or less,which is considered adequate for thepurpose designated under Scope.It should be recognized,however,that when expressed as volume percent of overheador of bottoms the percentages can be higher,making this testmethod unsuitable for any purposes not designated underScope.5.Apparatus5.1 Depentanization Apparatus,as shown in Fig.1,consist-ing of the following parts:5.1.1 Distillation Column,5.1.2 Reflux Condenser Head,5.1.3 Light-Ends Trap,5.1.4 Receiver,graduated,12.5 mL,and5.1.5 Thermometer,3,410 to 79C(50 to 175F).5.2 Column PackingTwo types are required:5.2.1 Heli-Pak Column Packing,4,51.27 by 2.54 by 2.54mm(Size B,0.050 by 0.100 by 0.100 in.).5.2.2 Heli-Pak Column Packing,4,5Size C,4.4 by 4.4 m(0.090 by 0.175 by 0.175 in.),or Cannon Protruded MetalPacking,4,64.0 by 4.0 mm(0.16 by 0.16 in.).5.3 Distillation Flask,round-bottom,100 mL,with2440standard-taper female joint.5.4 Distillation Flask Heating Mantle,Glas-Col,spherical,for 100-mL flask.1This test method is under the jurisdiction of ASTM Committee D02 onPetroleum Products and Lubricants and is the direct responsibility of SubcommitteeD02.04.0C on Liquid Chromatography.Current edition approved June 1,2012.Published July 2012.Originally approvedin 1962.Last previous edition approved in D200107.DOI:10.1520/D2001-07R12.2For 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 sole source of supply of the apparatus known to the committee at this timeis Thermometer No.ME510-1 available from Metro Scientific Inc.,11 Willow ParkCenter,East Farmingdale,NY 11735.4If you are aware of alternative suppliers,please provide this information toASTM International Headquarters.Your comments will receive careful consider-ation at a meeting of the responsible technical committee,1which you may attend.5The sole source of supply of the apparatus known to the committee at this timeis Reliance Glass Works Inc.,Gateway Rd.,PO Box 825,Bensenville,IL 60106.6The sole source of supply of the apparatus known to the committee at this timeis Cannon protruded metal packing available from Scientific Development Co.,Box795,State College,PA.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 5.5 Variable Transformer,for regulating power to heatingmantle.5.6 Water Cooling BathIf a supply of chilled water for thereflux condenser is not available,a satisfactory means forsupplying chilled water can be provided by circulating tapwater through coiled copper tubing immersed in an ice-waterbath.6.Preparation of Apparatus6.1 Fill the fractionating column with packing as follows:Place about 25 mm(1