1、Designation: D7185 11a D7185 12Standard 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
2、 number 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 specifi
3、ed 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
4、.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 Material Safety Data Sheets, and local regulations for all materials used inthis specification.2. Referenced Documents2.1 AS
5、TM 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of Clear Liquids (Platinum-Cobalt Scale)D1685 Test Method for Traces of Thiophene in Benzene by Spectrophotometry (Withdrawn 2009)3D34
6、37 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 Test Met
7、hod 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 DetectionD6304
8、 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 of Trace Thiophene in Refined Benzene by Gas
9、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 Combustion and Reduced PressureChemiluminescence Det
10、ectionD7359 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 Benzene by Gas Chromatography with External
11、Calibration1 This specification is under the jurisdiction of ASTM 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 edition approved Aug. 1, 2011Nov. 1, 2012. Pub
12、lished September 2011December 2012. Originally approved in 2006. Last previous edition approved in 2011 asD7185 - 11.D7185 11a. DOI: 10.1520/D7185-11A.10.1520/D7185-12.2 For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at serviceastm.org. For Annu
13、al 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 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 in
14、dication 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 versionof the standard as published by ASTM is to be
15、 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 Water in Aromatic Hydrocarbons and Their Mixt
16、ures 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 Effective CarbonNumberD7536 Test Method for Chlori
17、ne in Aromatics by Monochromatic Wavelength Dispersive X-ray Fluorescence SpectrometryE29 Practice for Using Significant Digits in Test Data to Determine Conformance with SpecificationsE1064 Test Method for Water in Organic Liquids by Coulometric Karl Fischer TitrationD7185 1222.2 Other Document:OSH
18、A 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 orD7504Sul
19、fur, max, mg/kg (if needed) D7183Thiophene, max, mg/kg 1.0 D1685 or D4735 orD7011Nonaromatic hydrocarbons, max,weight %0.15 D4492 or D7360 orD7504Nitrogen, max., mg/kg (if needed) D6069 or D7184Acid wash color, max pass with 1 D848Appearance B .Color, max, PtCo scale 20 D1209 or D53861,4 Dioxane, ma
20、x, mg/kg 10 D4492 or D7504Solidification point, anhydrousbasis, min, C(if needed) D852 or D6875Water Content, max, mg/kg (if needed) D6304 or D7375 orE1064Total Chlorides, max, mg/kg 1.0 D5194 or D5808 orD7359 orD7536Total Chlorides, max, mg/kg 1.0 D5194 or D5808 orD7359 or D7457 orD7536A If more th
21、an 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 Section 5 for non-mandatory supplementary requirements.4. Sampling4.1 The material shall be sampled in acc
22、ordance 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 MethodASulfur, max, mg/kg D7183Nitrogen, max, mg/kg D6069 or D7184Solidification point, anhydrous basis,
23、 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; dioxane; LTLD; tolueneSUMMARY OF CHANGESCommittee D16 has identified the location of selected chan
24、ges to this standard since the last issue(D7185 - 11D7185 - 11a) that may impact the use of this standard. (Approved AugustNovember 1, 2011.)2012.)(1) Added method for water, Test MethodModified Table 3.1 to eliminate non-mandatory requirements. Added 3.2 and Section 5to E1064 in Table in indicate n
25、on-mandatory items.3.1.(2) Modified Table 3.1 to allow Test Method D7360 as an alternate to Test Methods D4492 and D7504.(3) Modified Table 3.1 to allow Test Method D7457 as an alternate for the analysis of chloride.4 Available from U.S. Government Printing Office Superintendent of Documents, 732 N.
26、 Capitol St., NW, Mail Stop: SDE, Washington, DC 20401, http:/www.access.gpo.gov.D7185 123Committee D16 has identified the location of selected changes to this standard since the last issue (D7185 - 10)that may impact the use of this standard. (Approved January 1, 2011).(1) Added Test Method D7504.C
27、ommittee D16 has identified the location of selected changes to this standard since the last issue(D7185 - 08D7185 - 11) that may impact the use of this standard. (Approved August 15, 2010.)1, 2011.)(1) Added methodsmethod for chloride,water, D7359 andTest Method D7536E1064 in Table in 3.1.3.1.ASTM
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