1、Designation: D5211 16D5211 17Standard 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
2、 parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope*Scope1.1 This specification covers xylenes for p-xylene feedstock. These xylenes typically are extracted from reformate.1.2 The following applies t
3、o all specified limits in this specification: for purposes of determining conformance with thisspecification, an observed value or calculated value shall be rounded off “to the nearest unit” in the last right hand digit used inexpressing the specification limit, in accordance with the rounding-off m
4、ethod of Practice E29.1.3 The values stated in SI units are to be regarded as standard. The values given in parentheses are for information only.1.4 Consult current OSHA regulations, suppliers Safety Data Sheets (SDS), and local regulations for all materials used in thisspecification.1.5 This intern
5、ational standard was developed in accordance with internationally recognized principles on standardizationestablished in the Decision on Principles for the Development of International Standards, Guides and Recommendations issuedby the World Trade Organization Technical Barriers to Trade (TBT) Commi
6、ttee.2. Referenced Documents2.1 ASTM Standards:2D850 Test Method for Distillation of Industrial Aromatic Hydrocarbons and Related MaterialsD3437 Practice for Sampling and Handling Liquid Cyclic ProductsD5194 Test Method for Trace Chloride in Liquid Aromatic HydrocarbonsD5386 Test Method for Color of
7、 Liquids Using Tristimulus ColorimetryD5808 Test Method for Determining Chloride in Aromatic Hydrocarbons and Related Chemicals by MicrocoulometryD6563 Test Method for Benzene, Toluene, Xylene (BTX) Concentrates Analysis by Gas ChromatographyD7183 Test Method for Determination of Total Sulfur in Aro
8、matic Hydrocarbons and Related Chemicals by UltravioletFluorescenceD7184 Test Method for Ultra Low Nitrogen in Aromatic Hydrocarbons by Oxidative Combustion and Reduced PressureChemiluminescence DetectionD7359 Test Method for Total Fluorine, Chlorine and Sulfur in Aromatic Hydrocarbons and Their Mix
9、tures by OxidativePyrohydrolytic Combustion followed by Ion Chromatography Detection (Combustion Ion Chromatography-CIC)D7457 Test Method for Determining Chloride in Aromatic Hydrocarbons and Related Chemicals by MicrocoulometryD7504 Test Method for Trace Impurities in Monocyclic Aromatic Hydrocarbo
10、ns by Gas Chromatography and Effective CarbonNumberD7536 Test Method for Chlorine in Aromatics by Monochromatic Wavelength Dispersive X-ray Fluorescence SpectrometryD8005 Test Method for Color of Clear Liquids (Platinum-Cobalt Scale)E29 Practice for Using Significant Digits in Test Data to Determine
11、 Conformance with SpecificationsE2680 Test Method for Appearance of Clear, Transparent Liquids (Visual Inspection Procedure)2.2 Other Document:OSHA Regulations, 29 CFR paragraphs 1910.1000 and 1910.1200 31 This specification is under the jurisdiction of ASTM Committee D16 on Aromatic Hydrocarbons Ar
12、omatic, Industrial, Specialty and Related Chemicals and is the directresponsibility of Subcommittee D16.01 on Benzene, Toluene, Xylenes, Cyclohexane and Their Derivatives.Current edition approved June 1, 2016June 1, 2017. Published June 2016June 2017. Originally approved in 1991. Last previous editi
13、on approved in 20152016 asD5211 12.D5211 16. DOI: 10.1520/D5211-16.10.1520/D5211-17.2 For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at serviceastm.org. For Annual Book of ASTM Standardsvolume information, refer to the standards Document Summary pa
14、ge on the ASTM website.3 Available 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.This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication
15、 of what changes have been made to the previous version. Becauseit may not be technically possible to adequately 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 conside
16、red the official document.*A Summary of Changes section appears at the end of this standardCopyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States13. Properties3.1 Xylenes for p-xylene feedstock shall conform to the following requirements:D52
17、11 172Property SpecificationASTMTestMethodp-xylene,A min, weight % 18 D6563 or D7504Ethylbenzene,A max, 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 D75
18、04Sulfur, max, mg/kg 1.0 D7183Appearance B .Appearance, free of haze,particulates or suspendedmatter particlespass E2680Color, max, Pt/Co scale 20 D5386 or D8005Distillation range, at 101.3 kPa(760 mm Hg) pressure,max, C5 D850Initial distillation temperature,min, C137 .Dry point, max, C 143 .A The p
19、xylene and ethylbenzene specifications represent the weight percentage of these components within the C8 aromatics and not in the total sample.B Clear liquid free of sediment and haze when observed at 18.3 to 25.6C (65 to 78F).4. Sampling4.1 The material shall be sampled in accordance with Practice
20、 D3437.5. Calculation5.1 Calculate the weight percent relative distribution of each C8 aromatic hydrocarbon in the total C8 aromatic hydrocarbonfraction as follows:Fi 5 Wi(Wi3100% (1)where:Fi = weight fraction of C8 aromatic component i in the total C8 aromatic hydrocarbon fraction,Wi = weight fract
21、ion of C8 aromatic component i reported by the method given in Table in 3.1, andi = components: ethylbenzene, para-xylene, meta-xylene, and ortho-xylene.6. Supplementary Requirements (Non-mandatory)6.1 The following supplementary requirements shall apply when agreed upon by the supplier and purchase
22、r:Property ASTM Test MethodsANitrogen, max, mg/kg D7184Chloride D5194 or D5808 or D7359 orD7457 or D7536A If more than one method is listed, the producer and user should agree on the referee method.7. Keywords7.1 feedstock; p-xylene; xylenesD5211 173SUMMARY OF CHANGESCommittee D16 has identified the
23、 location of selected changes to this standard since the last issue (D521112)that may impact the use of this standard. (Approved June 1, 2016.)(1) Removed D1209 and added D8005 in Section 2.(2) Modified table in 3.1 to replace D1209 with D8005.(3) Removed D6069 from Section 2(4) Modified table in 3.
24、1 to remove D6069.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 infringement o
25、f 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 or for a
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28、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 Copyright Clearance Center, 222Rosewood Drive, Danvers, MA 01923, Tel: (978) 646-2600; http:/ 174
