1、Designation: D5211 11Standard Specification forXylenes for p-Xylene Feedstock1This standard is issued under the fixed designation D5211; 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 parenth
2、eses 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 xylenes for p-xylene feed-stock. These xylenes typically are extracted from reformate.1.2 The following applies to all specif
3、ied limits in thisspecification: for purposes of determining conformance withthis specification, an observed value or calculated value shallbe rounded off “to the nearest unit” in the last right hand digitused in expressing the specification limit, in accordance withthe rounding-off method of Practi
4、ce E29.1.3 The values stated in SI units are to be regarded asstandard. The values given in parentheses are for informationonly.1.4 Consult current OSHA regulations, suppliers MaterialSafety Data Sheets (MSDS), and local regulations for allmaterials used in this specification.2. Referenced Documents
5、2.1 ASTM Standards:2D850 Test Method for Distillation of Industrial AromaticHydrocarbons and Related MaterialsD1209 Test Method for Color of Clear Liquids (Platinum-Cobalt Scale)D3437 Practice for Sampling and Handling Liquid CyclicProductsD5194 Test Method for Trace Chloride in Liquid AromaticHydro
6、carbonsD5386 Test Method for Color of Liquids Using TristimulusColorimetryD5808 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 PressureChemilumine
7、scence DetectionD6563 Test Method for Benzene, Toluene, Xylene (BTX)Concentrates Analysis by Gas ChromatographyD7183 Test Method for Determination of Total Sulfur inAromatic Hydrocarbons and Related Chemicals by Ultra-violet FluorescenceD7184 Test Method for Ultra Low Nitrogen in AromaticHydrocarbon
8、s by Oxidative Combustion and ReducedPressure Chemiluminescence DetectionD7359 Test Method for Total Fluorine, Chlorine and Sulfurin Aromatic Hydrocarbons and Their Mixtures by Oxida-tive Pyrohydrolytic Combustion followed by Ion Chroma-tography Detection (Combustion Ion Chromatography-CIC)D7504 Tes
9、t 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 Test Data toDetermine Confor
10、mance with Specifications2.2 Other Document:OSHA Regulations, 29 CFR paragraphs 1910.1000 and1910.120031This 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
11、, Cyclohexane and TheirDerivatives.Current edition approved July 1, 2011. Published September 2011. Originallyapproved in 1991. Last previous edition approved in 2010 as D5211 10. DOI:10.1520/D5211-11.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Servi
12、ce at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe 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.g
13、ov.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 Xylenes for p-xylene feedstock shall conform to thefollowing requirements:Property SpecificationAST
14、MTestMethodp-xylene,Amin, weight % 18 D6563 or D7504Ethylbenzene,Amax, weight % 20 D6563 or D7504Toluene, max, weight % 0.5 D6563 or D7504C9 and higher boiling aromatichydrocarbons, max, weight %1.0 D6563 or D7504Nonaromatic hydrocarbons,max, weight %0.3 D6563 or D7504Nitrogen, max, mg/kg if needed
15、D6069 or D7184Sulfur, max, mg/kg 1.0 D7183AppearanceB.Chloride if needed D5194 or D5808 orD7359 or D7536Color, max, Pt/Co scale 20 D1209 or D5386Distillation range, at 101.3 kPa(760 mm Hg) pressure,max, C5 D850Initial distillation temperature,min, C137 .Dry point, max, C 143 .AThe p-xylene and ethyl
16、benzene specifications represent the weight percent-age of these components within the C8aromatics and not in the total sample.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. Calculatio
17、n5.1 Calculate the weight percent relative distribution of eachC8aromatic hydrocarbon in the total C8aromatic hydrocarbonfraction as follows:Fi5Wi(Wi3 100 % (1)where:Fi= weight fraction of C8aromatic component i in thetotal C8aromatic hydrocarbon fraction,Wi= weight fraction of C8aromatic component
18、i reportedby the method given in Table in 3.1, andi = components: ethylbenzene, para-xylene, meta-xylene, and ortho-xylene.6. Keywords6.1 feedstock; p-xylene; xylenesSUMMARY OF CHANGESCommittee D16 has identified the location of selected changes to this standard since the last issue (D5211 - 10)that
19、 may impact the use of this standard. (Approved July 1, 2011.)(1) Modified footnote A in table in 3.1.(2) Added Section 5 on Calculation for ethylbenzene, para-xylene, meta-xylene, and ortho-xylene and on a C8aromatichydrocarbon basis.Committee D16 has identified the location of selected changes to
20、this standard since the last issue (D5211 - 07)that may impact the use of this standard. (Approved August 1, 2010.)(1) Added methods for chloride, D7359 and D7536 in Table in3.1.ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item men
21、tionedin 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 standard is subject to revision at any time by the responsible technical committee
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23、g 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.This standard is copyrighted by ASTM International, 100 Barr Harbor Drive, PO
24、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/).D5211 112
