1、Designation:D718510 Designation: D7185 11Standard 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 r
2、evision. A 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 a
3、ll specified 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 Pr
4、actice 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 Material Safety Data Sheets, and local regulations for all materials used inthis specification.2. Referenced Docum
5、ents2.1 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 SpectrophotometryD3437 Pract
6、ice 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 Method for
7、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 Test Me
8、thod 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 Chromato
9、graphy 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 DetectionD7
10、359 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)D7375 Test Method for Trace Quantities of Water in Aromatic Hydrocarbons and Their Mix
11、tures by Coulometric Karl FischerTitrationD7504 Test Method for Trace Impurities in Monocyclic Aromatic Hydrocarbons by Gas Chromatography and Effective CarbonNumber1This specification is under the jurisdiction of ASTM Committee D16 on Aromatic Hydrocarbons and Related Chemicals and is the direct re
12、sponsibility of SubcommitteeD16.01 on Benzene, Toluene, Xylenes, Cyclohexane and Their Derivatives.Current edition approved Aug. 15, 2010. Published September 2010. Originally approved in 2006. Last previous edition approved in 2008 as D7185-08. DOI:10.1520/D7185-10.Current edition approved Jan. 1,
13、2011. Published February 2011. Originally approved in 2006. Last previous edition approved in 2010 as D7185 - 10. DOI:10.1520/D7185-11.2For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at serviceastm.org. For Annual Book of ASTM Standardsvolume in
14、formation, refer to the standards Document Summary page on the ASTM website.1This 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 adequatel
15、y 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 document.*A Summary of Changes section appears at the end of this standard.Copyright ASTM Inte
16、rnational, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.D7536 Test Method for Chlorine in Aromatics by Monochromatic Wavelength Dispersive X-ray Fluorescence SpectrometryE29 Practice for Using Significant Digits in Test Data to Determine Conformance with Specif
17、icationsD7185 1122.2 Other Document:OSHA Regulations, 29 CFR paragraphs 1910.1000 and 1910.120033. Properties3.1 Low Toluene Low Dioxane (LTLD) Benzene shall conform to the following requirements:Property Specification ASTM TestMethodAPurity, min, weight % 99.80 D4492Purity, min, weight % 99.80 D449
18、2 or D7504Toluene, max, weight % 0.05 D4492Toluene, max, weight % 0.05 D4492 or D7504Sulfur, max, mg/kg (if needed) D7183Thiophene, max, mg/kg 1.0 D1685 or D4735 orD7011Nonaromatic hydrocarbons, max,weight %0.15 D4492Nonaromatic hydrocarbons, max,weight %0.15 D4492 or D7504Nitrogen, max., mg/kg (if
19、needed) D6069 or D7184Acid wash color, max pass with 1 D848AppearanceB.Color, max, PtCo scale 20 D1209 or D53861,4 Dioxane, max, mg/kg 10 D44921,4 Dioxane, max, mg/kg 10 D4492 or D7504Solidification point, anhydrousbasis, min, C(if needed) D852 or D6875Water Content, max, mg/kg (if needed) D6304 or
20、D7375Total Chlorides, max, mg/kg 1.0 D5194 or D5808 orD7359 or D7536_Total Chlorides, max, mg/kg 1.0 D5194 or D5808 orD7359 or D7536AIf more than one method is listed for a property, the producer and user should agree on the referee test method.BClear liquid free of sediment and haze when observed a
21、t 18.3 to 25.6C (65 to 78F).4. Sampling4.1 The material shall be sampled in accordance with Practice D3437.5. Keywords5.1 benzene; dioxane; LTLD; tolueneSUMMARY OF CHANGESCommittee D16 has identified the location of selected changes to this standard since the last issue (D7185 - 10)that may impact t
22、he use of this standard. (Approved January 1, 2011).(1) Added Test Method D7504.Committee D16 has identified the location of selected changes to this standard since the last issue (D7185 - 08)that may impact the use of this standard. (Approved August 15, 2010.)(1) Added methods for chloride, D7359 a
23、nd D7536 in Table 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 infring
24、ement of such 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
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26、known to the ASTM Committee on Standards, at the 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
27、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 ASTM website (www.astm.org/COPYRIGHT/).3Available 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 113
