1、Designation: D4734 17D4734 18Standard Specification forRefined Benzene-5451This standard is issued under the fixed designation D4734; 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 parenthese
2、s indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope1.1 This specification covers benzene-545.1.2 The following applies to all specified limits in this standard: for purposes of determining conformance with this
3、 standard,an observed value or a calculated value shall be rounded off “to the nearest unit” in the last right-hand digit used in expressingthe specification limit in accordance with the rounding-off method in Practice E29.1.3 The values stated in SI units are to be regarded as standard. No other un
4、its 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 international standard was developed in accordance with internationally recognized principles on standardiza
5、tionestablished 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 Standards:2D848 Test Method for Acid Wash Color of Industrial Aro
6、matic HydrocarbonsD852 Test Method for Solidification Point of BenzeneD1492 Test Method for Bromine Index of Aromatic Hydrocarbons by Coulometric TitrationD1685 Test Method for Traces of Thiophene in Benzene by Spectrophotometry (Withdrawn 2009)3D3437 Practice for Sampling and Handling Liquid Cyclic
7、 ProductsD4492 Test Method for Analysis of Benzene by Gas Chromatography (Withdrawn 2018)3D4735 Test Method for Determination of Trace Thiophene in Refined Benzene by Gas ChromatographyD5386 Test Method for Color of Liquids Using Tristimulus ColorimetryD5776 Test Method for Bromine Index of Aromatic
8、 Hydrocarbons by Electrometric TitrationD6304 Test Method for Determination of Water in Petroleum Products, Lubricating Oils, and Additives by Coulometric KarlFischer TitrationD6875 Test Method for Solidification Point of Industrial Organic Chemicals by ThermistorD7011 Test Method for Determination
9、of Trace Thiophene in Refined Benzene by Gas Chromatography and Sulfur SelectiveDetectionD7183 Test Method for Determination of Total Sulfur in Aromatic Hydrocarbons and Related Chemicals by UltravioletFluorescenceD7184 Test Method for Ultra Low Nitrogen in Aromatic Hydrocarbons by Oxidative Combust
10、ion and Reduced PressureChemiluminescence DetectionD7360 Test Method for Analysis of Benzene by Gas Chromatography with External CalibrationD7375 Test Method for Trace Quantities of Water in Aromatic Hydrocarbons and Their Mixtures by Coulometric Karl FischerTitration (Withdrawn 2017)31 This specifi
11、cation 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, 2017March 1, 2018. Published June 20
12、17April 2018. Originally approved in 1987. Last previous edition approved in 20162017 asD4734 16.D4734 17. DOI: 10.1520/D4734-17.10.1520/D4734-18.2 For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at serviceastm.org. For Annual Book of ASTM Standards
13、volume 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 changes
14、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 official
15、document.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States1D7504 Test Method for Trace Impurities in Monocyclic Aromatic Hydrocarbons by Gas Chromatography and Effective CarbonNumberD8005 Test Method for Color of Clear Liquids (Platinum
16、Cobalt Scale)E29 Practice for Using Significant Digits in Test Data to Determine Conformance with SpecificationsE1064 Test Method for Water in Organic Liquids by Coulometric Karl Fischer TitrationE2680 Test Method for Appearance of Clear, Transparent Liquids (Visual Inspection Procedure)2.2 Other D
17、ocument:OSHA Regulations, 29 CFR paragraphs 1910.1000 and 1910.1200 44 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.D4734 1823. Properties3.1 Benzene-545 shall conform to the followi
18、ng requirements:Property Specification ASTM TestMethodABenzene, min, weight % 99.90 D4492 or D7360 orD7504Sulfur, max, mg/kg 1.0 D7183Thiophene, max, mg/kg 0.6 D1685, D4735, orD7011Toluene, max, weight% 0.05 D4492 or D7360 orD7504Nonaromatic hydrocarbons, max,weight %0.10 D4492 or D7360 orD7504Acid
19、wash color, max pass with 1 D848Bromine index, max 20 D1492 or D5776Appearance, free of haze,particulates or suspendedmatter particlespass E2680Color, max, PtCo scale 20 D5386 or D8005Solidification point, anhydrousbasis, min, C5.45 D852 or D6875A If more than one method is listed, the producer and
20、user should agree on the referee method.3.2 See Section 5 for non-mandatory supplementary requirements.4. Sampling4.1 The material shall be sampled in accordance with Practice D3437.5. Supplementary Requirements (Non-mandatory)5.1 The following supplementary requirements shall apply when agreed upon
21、 by the supplier and purchaser:Property ASTM Test MethodsANitrogen, max, mg/kg D71841,4 Dioxane D4492Water D6304 or E1064 or D7375Water E1064A If more than one method is listed, the producer and user should agree on the referee method.6. Keywords6.1 benzene; benzene-545; purityASTM International tak
22、es 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 rights, and the riskof infringement of such rights, are entirely their own re
23、sponsibility.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 for revision of this standard or for additional standardsand should be address
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25、 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 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:/ 183
