1、Designation: D7185 16D7185 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 n
2、umber in parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope*Scope1.1 This specification covers a grade of benzene known as Low Toluene Low Dioxane (LTLD) Benzene.1.2 The following applies to all spec
3、ified limits in this standard: for purposes of determining conformance with this 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 of Practice
4、E29.1.3 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.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
5、 developed in accordance 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 D
6、ocuments2.1 ASTM Standards:2D848 Test Method for Acid Wash Color of Industrial Aromatic HydrocarbonsD852 Test Method for Solidification Point of BenzeneD1685 Test Method for Traces of Thiophene in Benzene by Spectrophotometry (Withdrawn 2009)3D3437 Practice for Sampling and Handling Liquid Cyclic Pr
7、oductsD4492 Test Method for Analysis of Benzene by Gas ChromatographyD4735 Test Method for Determination of Trace Thiophene in Refined Benzene by Gas ChromatographyD5194 Test Method for Trace Chloride in Liquid Aromatic HydrocarbonsD5386 Test Method for Color of Liquids Using Tristimulus Colorimetry
8、D5808 Test Method for Determining Chloride in Aromatic Hydrocarbons and Related Chemicals by MicrocoulometryD6304 Test Method for Determination of Water in Petroleum Products, Lubricating Oils, and Additives by Coulometric KarlFischer TitrationD6875 Test Method for Solidification Point of Industrial
9、 Organic Chemicals by ThermistorD7011 Test Method for Determination 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
10、for Ultra Low Nitrogen in Aromatic Hydrocarbons by Oxidative Combustion and Reduced PressureChemiluminescence DetectionD7359 Test Method for Total Fluorine, Chlorine and Sulfur in Aromatic Hydrocarbons and Their Mixtures by OxidativePyrohydrolytic Combustion followed by Ion Chromatography Detection
11、(Combustion Ion Chromatography-CIC)D7360 Test Method for Analysis of Benzene by Gas Chromatography with External Calibration1 This specification is under the jurisdiction of ASTM Committee D16 on Aromatic Hydrocarbons Aromatic, Industrial, Specialty and Related Chemicals and is the directresponsibil
12、ity of Subcommittee D16.01 on Benzene, Toluene, Xylenes, Cyclohexane and Their Derivatives.Current edition approved June 1, 2016June 1, 2017. Published June 2016June 2017. Originally approved in 2006. Last previous edition approved in 20122016 asD7185 12.D7185 16. DOI: 10.1520/D7185-16.10.1520/D7185
13、-17.2 For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at serviceastm.org. For Annual Book of ASTM Standardsvolume information, refer to the standards Document Summary page on the ASTM website.3 The last approved version of this historical standard i
14、s 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 have been made to the previous version. Becauseit may not be technically possible to adequately depict all changes accurately, ASTM recommends
15、 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 document.*A Summary of Changes section appears at the end of this standardCopyright ASTM International, 100 Barr Harbor Drive, PO Box C700, We
16、st Conshohocken, PA 19428-2959. United States1D7375 Test Method for Trace Quantities of Water in Aromatic Hydrocarbons and Their Mixtures by Coulometric Karl FischerTitration (Withdrawn 2017)3D7457 Test Method for Determining Chloride in Aromatic Hydrocarbons and Related Chemicals by Microcoulometry
17、D7504 Test Method for Trace Impurities in Monocyclic Aromatic Hydrocarbons by Gas Chromatography and Effective CarbonNumberD7536 Test Method for Chlorine in Aromatics by Monochromatic Wavelength Dispersive X-ray Fluorescence SpectrometryD8005 Test Method for Color of Clear Liquids (Platinum-Cobalt S
18、cale)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 Document:O
19、SHA Regulations, 29 CFR paragraphs 1910.1000 and 1910.1200 43. Properties3.1 Low Toluene Low Dioxane (LTLD) Benzene shall conform to the following requirements:Property Specification ASTM TestMethodAPurity, min, weight % 99.80 D4492 or D7360 orD7504Toluene, max, weight % 0.05 D4492 or D7360 orD7504T
20、hiophene, 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 B .Appearance, free of haze,particulates or suspendedmatter particlespass E2680Color, max, PtCo scale 20 D5386 or D80051,4 Dioxane, max, mg/
21、kg 10 D4492 or D7504Total Chlorides, max, mg/kg 1.0 D5194 or D5808 orD7359 or D7457 orD7536A If more than one method is listed for a property, the producer and user should agree on the referee test method.B Clear liquid free of sediment and haze when observed at 18.3 to 25.6C (65 to 78F).3.2 See Sec
22、tion 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 by the supplier and purchaser.Property ASTM Test M
23、ethodASulfur, max, mg/kg D7183Nitrogen, max, mg/kg D7184Solidification point, anhydrous basis, min, C D852 or D6875Water Content, max, mg/kg D6304 or D7375 or E1064A If more than one method is listed for a property the producer and user should agree on the referee method.6. Keywords6.1 benzene; diox
24、ane; LTLD; toluene4 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.D7185 172SUMMARY OF CHANGESCommittee D16 has identified the location of selected changes to this standard since the l
25、ast issue (D712412)that may impact the use of this standard. (Approved June 1, 2016.)(1) Removed D1209 and added D8005 in Section 2.(2) Modified table in 3.1 to replace D1209 with D8005.(3) Removed D6069 from Section 2.(4) Modified table in 5.1 to remove D6069.ASTM International takes no position re
26、specting 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 responsibility.This
27、 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 ASTM Intern
28、ational 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 hearing you shouldmake your views known to the ASTM Committee on Standards, at the address shown be
29、low.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:/ 173
