1、Designation: D7185 17Standard Specification forLow Toluene Low Dioxane (LTLD) Benzene1This standard is issued under the fixed designation D7185; 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
2、 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 a grade of benzene known asLow Toluene Low Dioxane (LTLD) Benzene.1.2 The following applies to all specified limits in
3、 thisstandard: for purposes of determining conformance with thisstandard, an observed value or a calculated value shall berounded 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
4、 stated in SI units are to be regarded as thestandard. The values given in parentheses are for informationonly.1.4 Consult current OSHA regulations, suppliers SafetyData Sheets, and local regulations for all materials used in thisspecification.1.5 This international standard was developed in accor-d
5、ance 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 S
6、tandards:2D848 Test Method for Acid Wash Color of Industrial Aro-matic HydrocarbonsD852 Test Method for Solidification Point of BenzeneD1685 Test Method for Traces of Thiophene in Benzene bySpectrophotometry (Withdrawn 2009)3D3437 Practice for Sampling and Handling Liquid CyclicProductsD4492 Test Me
7、thod for Analysis of Benzene by Gas Chro-matographyD4735 Test Method for Determination of Trace Thiophenein Refined Benzene by Gas ChromatographyD5194 Test Method for Trace Chloride in Liquid AromaticHydrocarbonsD5386 Test Method for Color of Liquids Using TristimulusColorimetryD5808 Test Method for
8、 Determining Chloride in AromaticHydrocarbons and Related Chemicals by Microcoulom-etryD6304 Test Method for Determination of Water in Petro-leum Products, Lubricating Oils, and Additives by Cou-lometric Karl Fischer TitrationD6875 Test Method for Solidification Point of IndustrialOrganic Chemicals
9、by ThermistorD7011 Test Method for Determination of Trace Thiophenein Refined Benzene by Gas Chromatography and SulfurSelective DetectionD7183 Test Method for Determination of Total Sulfur inAromatic Hydrocarbons and Related Chemicals by Ultra-violet FluorescenceD7184 Test Method for Ultra Low Nitro
10、gen in AromaticHydrocarbons by Oxidative Combustion and ReducedPressure Chemiluminescence DetectionD7359 Test Method for Total Fluorine, Chlorine and Sulfurin Aromatic Hydrocarbons and Their Mixtures by Oxida-tive Pyrohydrolytic Combustion followed by Ion Chroma-tography Detection (Combustion Ion Ch
11、romatography-CIC)D7360 Test Method for Analysis of Benzene by Gas Chro-matography with External CalibrationD7375 Test Method for Trace Quantities of Water in Aro-matic Hydrocarbons and Their Mixtures by CoulometricKarl Fischer Titration (Withdrawn 2017)3D7457 Test Method for Determining Chloride in
12、AromaticHydrocarbons and Related Chemicals by Microcoulom-etryD7504 Test Method for Trace Impurities in MonocyclicAromatic Hydrocarbons by Gas Chromatography andEffective Carbon NumberD7536 Test Method for Chlorine in Aromatics by Mono-chromatic Wavelength Dispersive X-ray FluorescenceSpectrometry1T
13、his specification is under the jurisdiction of ASTM Committee D16 onAromatic, Industrial, Specialty and Related Chemicals and is the direct responsi-bility of Subcommittee D16.01 on Benzene, Toluene, Xylenes, Cyclohexane andTheir Derivatives.Current edition approved June 1, 2017. Published June 2017
14、. Originallyapproved in 2006. Last previous edition approved in 2016 as D7185 16. DOI:10.1520/D7185-17.2For 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
15、 Document Summary page onthe ASTM website.3The last approved version of this historical standard is referenced onwww.astm.org.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United StatesThis international standard was developed in accordance with
16、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.1D8005 Test Method for Color of Clear Liquid
17、s (Platinum-Cobalt Scale)E29 Practice for Using Significant Digits in Test Data toDetermine Conformance with SpecificationsE1064 Test Method for Water in Organic Liquids by Coulo-metric Karl Fischer TitrationE2680 Test Method for Appearance of Clear, TransparentLiquids (Visual Inspection Procedure)2
18、.2 Other Document:OSHA Regulations, 29 CFR paragraphs 1910.1000 and1910.120043. Properties3.1 Low Toluene Low Dioxane (LTLD) Benzene shallconform to the following requirements:Property SpecificationASTM TestMethodAPurity, min, weight % 99.80 D4492 or D7360 orD7504Toluene, max, weight % 0.05 D4492 or
19、 D7360 orD7504Thiophene, max, mg/kg 1.0 D1685 or D4735 orD7011Nonaromatic hydrocarbons, max,weight %0.15 D4492 or D7360 orD7504Acid wash color, max pass with 1 D848Appearance, free of haze,particulates or suspendedmatter particlespass E2680Property SpecificationASTM TestMethodAColor, max, PtCo scale
20、 20 D5386 or D80051,4 Dioxane, max, mg/kg 10 D4492 or D7504Total Chlorides, max, mg/kg 1.0 D5194 or D5808 orD7359 or D7457 orD7536AIf more than one method is listed for a property, the producer and user shouldagree on the referee test method.3.2 See Section 5 for non-mandatory supplementary re-quire
21、ments.4. Sampling4.1 The material shall be sampled in accordance withPractice D3437.5. Supplementary Requirements (Non-mandatory)5.1 The following supplementary requirements shall applywhen agreed upon by the supplier and purchaser.Property ASTM Test MethodASulfur, max, mg/kg D7183Nitrogen, max, mg/
22、kg D7184Solidification point, anhy-drous basis, min, CD852 or D6875Water Content, max, mg/kg D6304 or D7375 or E1064AIf more than one method is listed for a property the producer and user shouldagree on the referee method.6. Keywords6.1 benzene; dioxane; LTLD; tolueneASTM International takes no posi
23、tion 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 responsibili
24、ty.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 addressed to AST
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26、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-
27、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:/ 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.D7185 172
