1、Designation: D7951 17D7951 18Standard Specification forDisproportionation (TDP) Toluene1This standard is issued under the fixed designation D7951; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revision. A number
2、in parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope1.1 This specification covers Disproportionation (TDP) toluene.1.2 The following applies to all specified limits in this specification: for purpos
3、es of determining conformance with thisspecification, an observed value or a calculated value shall be rounded off “to the nearest unit” in the last right-hand digit usedin expressing the specification limit, in accordance with the rounding-off method of Practice E29.1.3 The values stated in SI unit
4、s are to be regarded as standard. No other units of measurement are included in this standard.1.4 Consult current OSHA regulations, suppliers Safety Data Sheets, and local regulations for all materials used in thisspecification.1.5 This standard does not purport to address all of the safety concerns
5、, if any, associated with its use. It is the responsibilityof the user of this standard to establish appropriate safety safety, health, and healthenvironmental practices and determine theapplicability of regulatory limitations prior to use.1.6 This international standard was developed in accordance
6、with internationally recognized principles on standardizationestablished in the Decision on Principles for the Development of International Standards, Guides and Recommendations issuedby the World Trade Organization Technical Barriers to Trade (TBT) Committee.2. Referenced Documents2.1 ASTM Standard
7、s:2D848 Test Method for Acid Wash Color of Industrial Aromatic HydrocarbonsD849 Test Method for Copper Strip Corrosion by Industrial Aromatic HydrocarbonsD850 Test Method for Distillation of Industrial Aromatic Hydrocarbons and Related MaterialsD1209 Test Method for Color of Clear Liquids (Platinum-
8、Cobalt Scale)D2360 Test Method for Trace Impurities in Monocyclic Aromatic Hydrocarbons by Gas Chromatography (Withdrawn 2016)3D3437 Practice for Sampling and Handling Liquid Cyclic ProductsD4052 Test Method for Density, Relative Density, and API Gravity of Liquids by Digital Density MeterD4492 Test
9、 Method for Analysis of Benzene by Gas Chromatography (Withdrawn 2018)3D5386 Test Method for Color of Liquids Using Tristimulus ColorimetryD6526 Test Method for Analysis of Toluene by Capillary Column Gas Chromatography (Withdrawn 2018)3D7183 Test Method for Determination of Total Sulfur in Aromatic
10、 Hydrocarbons and Related Chemicals by UltravioletFluorescenceD7184 Test Method for Ultra Low Nitrogen in Aromatic Hydrocarbons by Oxidative Combustion and Reduced PressureChemiluminescence DetectionD7360 Test Method for Analysis of Benzene by Gas Chromatography with External CalibrationD7504 Test M
11、ethod for Trace Impurities in Monocyclic Aromatic Hydrocarbons by Gas Chromatography and Effective CarbonNumberE29 Practice for Using Significant Digits in Test Data to Determine Conformance with SpecificationsE2680 Test Method for Appearance of Clear, Transparent Liquids (Visual Inspection Procedur
12、e)1 This specification is under the jurisdiction of ASTM Committee D16 on Aromatic, Industrial, Specialty and Related Chemicals and is the direct responsibility ofSubcommittee D16.01 on Benzene, Toluene, Xylenes, Cyclohexane and Their Derivatives.Current edition approved June 1, 2017June 1, 2018. Pu
13、blished June 2017June 2018. Originally approved in 2014. Last previous edition approved in 20142017 as D7951 14.17. DOI: 10.1520/D7951-17.10.1520/D7951-18.2 For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at serviceastm.org. For Annual Book of ASTM
14、Standardsvolume information, refer to the standards Document Summary page on the ASTM website.3 The last approved version of this historical standard is referenced on www.astm.org.This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what
15、 changes have been made to the previous version. Becauseit may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current versionof the standard as published by ASTM is to be considered the
16、official document.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States12.2 Other Documents:4OSHA Regulations, 29 CFR paragraphs 1910.1000 and 1910.12003. Properties3.1 Disproportionation toluene shall conform to the following requirements:
17、Property Specification ASTMTest MethodAPurity, min, wt% 95.0 D2360, D6526, orD7504Benzene, max, wt% 0.1 D2360, D6526 orD7504Impurities eluting afterOrthoxylene, max, wt% 0.1D2360, D6526, orD75041,4-Dioxane, max, mg/kg 10 D7504Nonaromatic hydrocarbons,max, wt%2.5 D2360 orD7504Sulfur, max, mg/kg 1 D71
18、83Acid wash color, max pass with 2 D848Copper corrosion pass (1A or 1B) D849Appearance, free of haze,particulates or suspendedmatter particlespass E2680Color, Pt/Co scale, max 20 D5386Relative density,15.56/15.56 C0.869 to 0.873 D4052Total Nitrogen, max, mg/kg 1.0 D7184A If more than one method is l
19、isted for a property the producer and user shall agree on the reference method.4 Available from U.S. Government Printing Office Superintendent of Documents, 732 N. Capitol St., NW, Mail Stop: SDE, Washington, DC 20401, http:/www.access.gpo.gov.D7951 1824. Sampling4.1 The material shall be sampled in
20、 accordance with Practice D3437.5. Keywords5.1 tolueneASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard. Users of this standard are expressly advised that determination of the validity of any such patent r
21、ights, and the riskof infringement of such rights, are entirely their own responsibility.This standard is subject to revision at any time by the responsible technical committee and must be reviewed every five years andif not revised, either reapproved or withdrawn.Your comments are invited either fo
22、r revision of this standard or for additional standardsand should be addressed to ASTM International Headquarters. Your comments will receive careful consideration at a meeting of theresponsible technical committee, which you may attend. If you feel that your comments have not received a fair hearin
23、g you shouldmake your views known to the ASTM Committee on Standards, at the address shown below.This standard is copyrighted by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,United States. Individual reprints (single or multiple copies) of this standard ma
24、y be obtained by contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org). Permission rights to photocopy the standard may also be secured from the Copyright Clearance Center, 222Rosewood Drive, Danvers, MA 01923, Tel: (978) 646-2600; http:/ 183
