1、Designation: D 4734 08Standard Specification forRefined Benzene-5451This standard is issued under the fixed designation D 4734; 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 parentheses indi
2、cates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope*1.1 This specification covers benzene-545.1.2 The following applies to all specified limits in thisstandard: for purposes of determining conformance with thisstanda
3、rd, 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 in Practice E29.1.3 The values stated in SI units are to be regarded asstandard. No other units of me
4、asurement are included in thisstandard.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:2D 848 Test Method for Acid Wash Color of IndustrialAromatic HydrocarbonsD 85
5、2 Test Method for Solidification Point of BenzeneD 1209 Test Method for Color of Clear Liquids (Platinum-Cobalt Scale)D 1492 Test Method for Bromine Index of Aromatic Hy-drocarbons by Coulometric TitrationD 1685 Test Method for Traces of Thiophene in Benzene bySpectrophotometryD 3437 Practice for Sa
6、mpling and Handling Liquid CyclicProductsD 4492 Test Method for Analysis of Benzene by GasChromatographyD 4735 Test Method for Determination of Trace Thiophenein Refined Benzene by Gas ChromatographyD 5386 Test Method for Color of Liquids Using TristimulusColorimetryD 5776 Test Method for Bromine In
7、dex of Aromatic Hy-drocarbons by Electrometric TitrationD 6069 Test Method for Trace Nitrogen in Aromatic Hy-drocarbons by Oxidative Combustion and Reduced Pres-sure Chemiluminescence DetectionD 6304 Test Method for Determination of Water in Petro-leum Products, Lubricating Oils, and Additives by Co
8、ulo-metric Karl Fischer TitrationD 6875 Test Method for Solidification Point of IndustrialOrganic Chemicals by ThermistorD 7011 Test Method for Determination of Trace Thiophenein Refined Benzene by Gas Chromatography and SulfurSelective DetectionD 7183 Test Method for Determination of Total Sulfur i
9、nAromatic Hydrocarbons and Related Chemicals by Ultra-violet FluorescenceD 7184 Test Method for Ultra Low Nitrogen in AromaticHydrocarbons by Oxidative Combustion and ReducedPressure Chemiluminescence DetectionD 7375 Test Method for Trace Quantities of Water inAromatic Hydrocarbons and Their Mixture
10、s by Coulom-etric Karl Fischer TitrationE29 Practice for Using Significant Digits in Test Data toDetermine Conformance with SpecificationsE 1064 Test Method for Water in Organic Liquids byCoulometric Karl Fischer Titration2.2 Other Document:OSHA Regulations, 29 CFR paragraphs 1910.1000 and1910.12003
11、1This 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 Dec. 1, 2008. Published December 2008. Orig
12、inallyapproved in 1987. Last previous edition approved in 2007 as D 4734 07.2For 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 standards Document Summary page onth
13、e ASTM website.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.1*A Summary of Changes section appears at the end of this standard.Copyright ASTM International, 100 Barr Harbor Drive, PO
14、 Box C700, West Conshohocken, PA 19428-2959, United States.3. Properties3.1 Benzene-545 shall conform to the following require-ments:Property SpecificationASTM TestMethodABenzene, min, weight % 99.90 D 4492Sulfur, max, mg/kg 1.0 D 7183Thiophene, max, mg/kg 0.6 D 1685, D 4735,orD 7011Toluene, max, we
15、ight% 0.05 D 4492Nonaromatic hydrocarbons, max,weight %0.10D 4492Nitrogen, max, mg/kg (if needed) D 6069 or D 71841,4 Dioxane (if needed) D 4492Acid wash color, max pass with 1 D 848Bromine index, max 20 D 1492 or D 5776Water (if needed) D 6304 orE 1064 orD 7375AppearanceB.Color, max, PtCo scale 20
16、D 1209 or D 5386Solidification point, anhydrousbasis, min, C5.45 D 852 or D 6875_AIf more than one method is listed, the producer and user should agree on thereferee method.BClear liquid at 18.3 to 25.6C.4. Sampling4.1 The material shall be sampled in accordance withPractice D 3437.5. Keywords5.1 be
17、nzene; benzene-545; puritySUMMARY OF CHANGESCommittee D16 has identified the location of selected changes to this standard since the last issue(D 4734 - 07) that may impact the use of this standard. (Approved December 1, 2008.)(1) Added Test Method D 7375 as an alternate method forwater.Committee D1
18、6 has identified the location of selected changes to this standard since the last issue(D 4734 - 06) that may impact the use of this standard. (Approved June 1, 2007.)(1) Changed method entry for sulfur in 3.1.(2) Changed method entry for nitrogen in 3.1.ASTM International takes no position respecti
19、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
20、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
21、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
22、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).D4734082
