ASTM_D_721_-_17.pdf

Designation:D72117Designation:158/69(85)Standard Test Method forOil Content of Petroleum Waxes1This standard is issued under the fixed designation D721;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.This standard has been approved for use by agencies of the U.S.Department of Defense.1.Scope*1.1 This test method covers the determination of oil inpetroleum waxes having a congealing point of 30 C(86 F)orhigher as determined in accordance with Test Method D938,and containing not more than 15%of oil.2NOTE1With some types of waxes,of oil contents greater than 5%,there may be an incompatibility with MEK resulting in the formation oftwo liquid phases.If this occurs,the test method is not applicable to thematerial under test.1.2 The values stated in inch-pound units are to be regardedas standard.The values given in parentheses are mathematicalconversions to SI units that are provided for information onlyand are not considered standard.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.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:3D938 Test Method for Congealing Point of PetroleumWaxes,Including PetrolatumE1 Specification for ASTM Liquid-in-Glass ThermometersE128 Test Method for Maximum Pore Diameter and Perme-ability of Rigid Porous Filters for Laboratory UseE2251 Specification for Liquid-in-Glass ASTM Thermom-eters with Low-Hazard Precision Liquids2.2 Energy Institute Standards:Specification for IP Standard Thermometers43.Summary of Test Method3.1 The sample is dissolved in methyl ethyl ketone,thesolution cooled to 32 C(25 F)to precipitate the wax,andfiltered.The oil content of the filtrate is determined byevaporating the methyl ethyl ketone and weighing the residue.4.Significance and Use4.1 The oil content of a wax may have significant effects onseveral of its properties,such as strength,hardness,flexibility,scuff resistance,coefficient of friction,coefficient of expansion,melting point,and oil straining.The importance of these effectsmay be dependent upon the ultimate use of the wax.5.Apparatus5.1 Filter Stick and Assembly,consisting of a 10 mm diam-eter sintered glass filter stick of 10 m to 15 m maximum porediameter as determined by the method in Appendix X1,provided with an air pressure inlet tube and delivery nozzle.Itis provided with a ground-glass joint to fit a 25 mm by 170 mmtest tube.The dimensions for a suitable filtration assembly areshown in Fig.1.1This test method is under the jurisdiction of ASTM Committee D02 onPetroleum Products,Liquid Fuels,and Lubricants and is the direct responsibility ofSubcommittee D02.10.0A on Physical/Chemical Properties.Current edition approved May 1,2017.Published June 2017.Originallyapproved in 1943.Last previous edition approved in 2015 as D721 15.DOI:10.1520/D0721-17.In the IP,this test method is under the jurisdiction of the StandardizationCommittee.This test method was issued as a joint ASTM-IP tentative in 1964.This test method was prepared jointly by the Technical Association of Pulp andPaper Industry and ASTM International.This test method has been adopted for use by government agencies to replaceMethod 5431 of Federal Test Method Standard No.79lb.2This test method is being used by some laboratories for products of higher oilcontent.3For 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.4Available from Energy Institute,61 New Cavendish St.,London,WIG 7AR,U.K.*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 NOTE2A metallic filter stick may be employed if desired.A filterstick made of stainless steel and having a 12.7 mm(12in.)disk of 10 mto 15 m maximum pore diameter,as determined