1、Designation: D7185 12D7185 16Standard 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*1.1 This specification covers a grade of benzene known as Low Toluene Low Dioxane (LTLD) Benzene.1.2 The following applies to all specified
3、 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 E29.1
4、.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 Material suppliers Safety Data Sheets, and local regulations for all materialsused in this specification.2. Referenced Documen
5、ts2.1 ASTM Standards:2D848 Test Method for Acid Wash Color of Industrial Aromatic HydrocarbonsD852 Test Method for Solidification Point of BenzeneD1209 Test Method for Color of Clear Liquids (Platinum-Cobalt Scale)D1685 Test Method for Traces of Thiophene in Benzene by Spectrophotometry (Withdrawn 2
6、009)3D3437 Practice for Sampling and Handling Liquid Cyclic ProductsD4492 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
7、Test Method for Color of Liquids Using Tristimulus ColorimetryD5808 Test Method for Determining Chloride in Aromatic Hydrocarbons and Related Chemicals by MicrocoulometryD6069 Test Method for Trace Nitrogen in Aromatic Hydrocarbons by Oxidative Combustion and Reduced PressureChemiluminescence Detect
8、ion (Withdrawn 2015)3D6304 Test Method for Determination of Water in Petroleum Products, Lubricating Oils, and Additives by Coulometric KarlFischer Titration (Withdrawn 2016)3D6875 Test Method for Solidification Point of Industrial Organic Chemicals by ThermistorD7011 Test Method for Determination o
9、f 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 Combusti
10、on 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 (Combustion Ion Chromatography-CIC)D7360 Test Method for Analysis of
11、Benzene by Gas Chromatography with External Calibration1 This specification is under the jurisdiction ofASTM Committee D16 on Aromatic Hydrocarbons and Related Chemicals and is the direct responsibility of SubcommitteeD16.01 on Benzene, Toluene, Xylenes, Cyclohexane and Their Derivatives.Current edi
12、tion approved Nov. 1, 2012June 1, 2016. Published December 2012June 2016. Originally approved in 2006. Last previous edition approved in 20112012 asD7185 11a.D7185 12. DOI: 10.1520/D7185-12.10.1520/D7185-16.2 For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer
13、Service at serviceastm.org. For Annual Book of ASTM Standardsvolume information, refer to the standardsstandards 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
14、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 that users consult prior editions as appropriate. In all cases only the current version
15、of 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, West Conshohocken, PA 19428-2959. United States1D7375 Test Method for Trace Quantities of
16、Water in Aromatic Hydrocarbons and Their Mixtures by Coulometric Karl FischerTitrationD7457 Test Method for Determining Chloride in Aromatic Hydrocarbons and Related Chemicals by MicrocoulometryD7504 Test Method for Trace Impurities in Monocyclic Aromatic Hydrocarbons by Gas Chromatography and Effec
17、tive CarbonNumberD7536 Test Method for Chlorine in Aromatics by Monochromatic Wavelength Dispersive X-ray Fluorescence SpectrometryD8005 Test Method for Color of Clear Liquids (Platinum-Cobalt Scale)E29 Practice for Using Significant Digits in Test Data to Determine Conformance with SpecificationsE1
18、064 Test Method for Water in Organic Liquids by Coulometric Karl Fischer Titration2.2 Other Document:OSHA 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 TestMethod
19、APurity, min, weight % 99.80 D4492 or D7360 orD7504Toluene, max, weight % 0.05 D4492 or 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 B .Color, max, PtCo scale 20 D1209 or
20、D5386Color, max, PtCo scale 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 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 sedime
21、nt and haze when observed at 18.3 to 25.6C (65 to 78F).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 w
22、hen agreed upon by the supplier and purchaser.Property ASTM Test MethodASulfur, max, mg/kg D7183Nitrogen, max, mg/kg D6069 or D7184Nitrogen, 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
23、 for a property the producer and user should agree on the referee method.6. Keywords6.1 benzene; dioxane; 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 162SUMMARY
24、 OF CHANGESCommittee D16 has identified the location of selected changes to this standard since the last issue(D7185 - 11aD7124)12) that may impact the use of this standard. (Approved NovemberJune 1, 2012.)2016.)(1) Modified Table 3.1 to eliminate non-mandatory requirements. Added 3.2 and Section 5
25、to indicate non-mandatoryitems.Removed D1209 and added D8005 in Section 2.(2) Modified Table 3.1 to allow Test Method D7360 as an alternate to Test Methods D4492 and D7504.table in 3.1 to replaceD1209 with D8005.(3) Removed D6069 from Section 2.(4) Modified Table 3.1 to allow Test Method D7457 as an
26、 alternate for the analysis of chloride.table in 5.1 to remove D6069.Committee D16 has identified the location of selected changes to this standard since the last issue (D7185 - 11)that may impact the use of this standard. (Approved August 1, 2011.)(1) Added method for water, Test Method E1064 in Ta
27、ble in 3.1.ASTM 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 rights, and the riskof infringement of such
28、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 for revision of this standard or for addition
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31、veaddress 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:/ 163
