1、Designation: D7951 14Standard 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 in paren
2、theses 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 thisspecification: for purposes of dete
3、rmining conformance withthis specification, an observed value or a calculated value shallbe rounded off “to the nearest unit” in the last right-hand digitused in expressing the specification limit, in accordance withthe rounding-off method of Practice E29.1.3 The values stated in SI units are to be
4、regarded asstandard. No other units of measurement are included in thisstandard.1.4 Consult current OSHA regulations, suppliers SafetyData Sheets, and local regulations for all materials used in thisspecification.1.5 This standard does not purport to address all of thesafety concerns, if any, associ
5、ated 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:2D848 Test Method for Acid Wash Color of Industrial Aro-mati
6、c HydrocarbonsD849 Test Method for Copper Strip Corrosion by IndustrialAromatic HydrocarbonsD850 Test Method for Distillation of Industrial AromaticHydrocarbons and Related MaterialsD1209 Test Method for Color of Clear Liquids (Platinum-Cobalt Scale)D2360 Test Method for Trace Impurities in Monocycl
7、icAromatic Hydrocarbons by Gas ChromatographyD3437 Practice for Sampling and Handling Liquid CyclicProductsD4052 Test Method for Density, Relative Density, and APIGravity of Liquids by Digital Density MeterD4492 Test Method for Analysis of Benzene by Gas Chro-matographyD5386 Test Method for Color of
8、 Liquids Using TristimulusColorimetryD6526 Test Method for Analysis of Toluene by CapillaryColumn Gas ChromatographyD7183 Test Method for Determination of Total Sulfur inAromatic Hydrocarbons and Related Chemicals by Ultra-violet FluorescenceD7360 Test Method for Analysis of Benzene by Gas Chro-mato
9、graphy with External CalibrationD7504 Test Method for Trace Impurities in MonocyclicAromatic Hydrocarbons by Gas Chromatography andEffective Carbon NumberE29 Practice for Using Significant Digits in Test Data toDetermine Conformance with Specifications2.2 Other Documents:3OSHA Regulations, 29 CFR pa
10、ragraphs 1910.1000 and1910.12001This specification is under the jurisdiction of ASTM Committee D16 onAromatic Hydrocarbons and Related Chemicals and is the direct responsibility ofSubcommittee D16.01 on Benzene, Toluene, Xylenes, Cyclohexane and TheirDerivatives.Current edition approved Dec. 1, 2014
11、. Published January 2015. DOI: 10.1520/D7951-14.2For 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.3Available fr
12、om U.S. Government Printing Office Superintendent of Documents,732 N. Capitol St., NW, Mail Stop: SDE, Washington, DC 20401, http:/www.access.gpo.gov.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States13. Properties3.1 Disproportionation
13、toluene shall conform to the follow-ing requirements:Property SpecificationASTMTest MethodAPurity, min, wt% 95.0 D2360,D6526,orD7504Benzene, max, wt% 0.1 D2360D6526 orD7504Impurities eluting afterOrthoxylene, max, wt% 0.1D2360D6526,orD75041,4-Dioxane, max, mg/kg 10 D7504Nonaromatic hydrocarbons,max,
14、 wt%2.5 D2360 orD7504Sulfur, max, mg/kg 1 D7183Acid wash color, max pass with 2 D848Copper corrosion pass (1A or 1B) D849AppearanceB.Color, Pt/Co scale, max 20 D5386Relative density, 15.56/15.56 C 0.869 to 0.873 D4052AIf more than one method is listed for a property the producer and user shall agree
15、on the reference method.BClear liquid free of sediment and haze at 18.3 to 25.6 C.4. Sampling4.1 The material shall be sampled in accordance withPractice D3437.5. Keywords5.1 tolueneASTM International takes no position respecting the validity of any patent rights asserted in connection with any item
16、 mentionedin this standard. Users of this standard are expressly advised that determination of the validity of any such patent rights, 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 commi
17、ttee and must be reviewed every five years andif not revised, either reapproved or withdrawn. Your comments are invited either for revision of this standard or for additional standardsand should be addressed to ASTM International Headquarters. Your comments will receive careful consideration at a me
18、eting of theresponsible technical committee, which you may attend. If you feel that your comments have not received a fair hearing 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,
19、 PO Box C700, West Conshohocken, PA 19428-2959,United States. Individual reprints (single or multiple copies) of this standard may 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:/ 142
