1、Designation: D7185 10Standard 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 in
2、 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 i
3、n 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 value
4、s 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:2D84
5、8 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 Handlin
6、g 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 Tristim
7、ulusColorimetryD5808 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 Wate
8、r 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 De
9、tectionD7183 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 Flu
10、orine, 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 F
11、ischer TitrationD7536 Test Method for Chlorine in Aromatics by Mono-chromatic Wavelength Dispersive X-ray FluorescenceSpectrometryE29 Practice for Using Significant Digits in Test Data toDetermine Conformance with Specifications2.2 Other Document:OSHA Regulations, 29 CFR paragraphs 1910.1000 and1910
12、.120041This specification is under the jurisdiction of ASTM Committee D16 onAromatic Hydrocarbons and Related Chemicals and is the direct responsibility ofSubcommittee D16.01 on Benzene, Toluene, Xylenes, Cyclohexane and TheirDerivatives.Current edition approved Aug. 15, 2010. Published September 20
13、10. Originallyapproved in 2006. Last previous edition approved in 2008 as D7185 - 08. DOI:10.1520/D7185-10.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the stand
14、ards Document Summary page onthe ASTM website.3Withdrawn. The last approved version of this historical standard is referencedon www.astm.org.4Available from U.S. Government Printing Office Superintendent of Documents,732 N. Capitol St., NW, Mail Stop: SDE, Washington, DC 20401, http:/www.access.gpo.
15、gov.1*A Summary of Changes section appears at the end of this standard.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.3. Properties3.1 Low Toluene Low Dioxane (LTLD) Benzene shallconform to the following requirements:Property Specifi
16、cation ASTM TestMethodAPurity, min, weight % 99.80 D4492Toluene, max, weight % 0.05 D4492Sulfur, max, mg/kg (if needed) D7183Thiophene, max, mg/kg 1.0 D1685 or D4735 orD7011Nonaromatic hydrocarbons, max,weight %0.15 D4492Nitrogen, max., mg/kg (if needed) D6069 or D7184Acid wash color, max pass with
17、1 D848AppearanceB.Color, max, PtCo scale 20 D1209 or D53861,4 Dioxane, max, mg/kg 10 D4492Solidification point, anhydrousbasis, min, C(if needed) D852 or D6875Water Content, max, mg/kg (if needed) D6304 or D7375Total Chlorides, max, mg/kg 1.0 D5194 or D5808 orD7359 or D7536_AIf more than one method
18、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 sampled in accordance withPractice D3437.5. Keywords5.1 benzene; dioxane; LTLD; tolueneSUMMARY
19、 OF CHANGESCommittee 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 and D7536 in Table in3.1.ASTM International takes no position respecti
20、ng 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 stand
21、ard 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 Internation
22、al 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 below.T
23、his 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 ASTM website (www.astm.org/COPYRIGHT/).D7185 102
