1、Designation: D7185 11aStandard 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 i
2、n 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 asLow Toluene Low Dioxane (LTLD) Benzene.1.2 The following applies to all specified limits
3、in 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 valu
4、es 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 MaterialSafety Data Sheets, and local regulations for all materials usedin this specification.2. Referenced Documents2.1 ASTM Standards:2D8
5、48 Test Method for Acid Wash Color of IndustrialAromatic 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 bySpectrophotometry3D3437 Practice for Sampling and Handli
6、ng Liquid CyclicProductsD4492 Test Method 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 Tristi
7、mulusColorimetryD5808 Test Method for Determining Chloride in AromaticHydrocarbons and Related Chemicals by Microcoulom-etryD6069 Test Method for Trace Nitrogen in Aromatic Hydro-carbons by Oxidative Combustion and Reduced PressureChemiluminescence DetectionD6304 Test Method for Determination of Wat
8、er in Petro-leum Products, Lubricating Oils, and Additives by Coulo-metric Karl Fischer TitrationD6875 Test Method for Solidification Point of IndustrialOrganic Chemicals by ThermistorD7011 Test Method for Determination of Trace Thiophenein Refined Benzene by Gas Chromatography and SulfurSelective D
9、etectionD7183 Test Method for Determination of Total Sulfur inAromatic Hydrocarbons and Related Chemicals by Ultra-violet FluorescenceD7184 Test Method for Ultra Low Nitrogen in AromaticHydrocarbons by Oxidative Combustion and ReducedPressure Chemiluminescence DetectionD7359 Test Method for Total Fl
10、uorine, Chlorine and Sulfurin Aromatic Hydrocarbons and Their Mixtures by Oxida-tive Pyrohydrolytic Combustion followed by Ion Chroma-tography Detection (Combustion Ion Chromatography-CIC)D7375 Test Method for Trace Quantities of Water in Aro-matic Hydrocarbons and Their Mixtures by CoulometricKarl
11、Fischer TitrationD7504 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 FluorescenceSpectrometryE29 Practice for Using Significant Digits in Te
12、st Data toDetermine Conformance with SpecificationsE1064 Test Method for Water in Organic Liquids by Cou-lometric Karl Fischer Titration1This specification is under the jurisdiction of ASTM Committee D16 onAromatic Hydrocarbons and Related Chemicals and is the direct responsibility ofSubcommittee D1
13、6.01 on Benzene, Toluene, Xylenes, Cyclohexane and TheirDerivatives.Current edition approved Aug. 1, 2011. Published September 2011. Originallyapproved in 2006. Last previous edition approved in 2011 as D7185 - 11. DOI:10.1520/D7185-11A.2For referenced ASTM standards, visit the ASTM website, www.ast
14、m.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.3Withdrawn. The last approved version of this historical standard is referencedon www.astm.org.1*A Summary of Changes sectio
15、n appears at the end of this standard.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.2.2 Other Document:OSHA Regulations, 29 CFR paragraphs 1910.1000 and1910.120043. Properties3.1 Low Toluene Low Dioxane (LTLD) Benzene shallconform t
16、o the following requirements:Property Specification ASTM TestMethodAPurity, min, weight % 99.80 D4492 or D7504Toluene, 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 D4492 or D7504Nitroge
17、n, max., mg/kg (if 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 D4492 or D7504Solidification point, anhydrousbasis, min, C(if needed) D852 or D6875Water Content, max, mg/kg (if needed) D6304 or D7375 orE1064
18、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 shouldagree on the referee test method.BClear liquid free of sediment and haze when observed at 18.3 to 25.6C (65 to78F).4. Sampling4.1 The material shall be sample
19、d in accordance withPractice 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 - 11)that may impact the use of this standard. (Approved August 1, 2011.)(1) Added method for
20、water, Test Method E1064 in Table in3.1.Committee 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.Committee D16 has identified the location of select
21、ed 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 and D7536 in Table in3.1.4Available from U.S. Government Printing Office Superintendent of Documents,732 N. Capitol St., NW, Mail St
22、op: SDE, Washington, DC 20401, http:/www.access.gpo.gov.D7185 11a2ASTM 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 s
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25、a fair hearing you shouldmake your views 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 thi
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