1、Designation: D5211 11 D5211 12Standard 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 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 xylenes for p-xylene feedstock. These xylenes typically are extracted from reformate.1.2 The following applies to al
3、l 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 metho
4、d 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 Material Safety Data Sheets (MSDS), and local regulations for all materialsused in this specification.2. Refere
5、nced Documents2.1 ASTM Standards:2D850 Test Method for Distillation of Industrial Aromatic Hydrocarbons and Related MaterialsD1209 Test Method for Color of Clear Liquids (Platinum-Cobalt Scale)D3437 Practice for Sampling and Handling Liquid Cyclic ProductsD5194 Test Method for Trace Chloride in Liqu
6、id Aromatic HydrocarbonsD5386 Test Method for Color of Liquids Using Tristimulus ColorimetryD5808 Test Method for Determining Chloride in Aromatic Hydrocarbons and Related Chemicals by MicrocoulometryD6069 Test Method for Trace Nitrogen in Aromatic Hydrocarbons by Oxidative Combustion and Reduced Pr
7、essureChemiluminescence DetectionD6563 Test Method for Benzene, Toluene, Xylene (BTX) Concentrates Analysis by Gas ChromatographyD7183 Test Method for Determination of Total Sulfur in Aromatic Hydrocarbons and Related Chemicals by UltravioletFluorescenceD7184 Test Method for Ultra Low Nitrogen in Ar
8、omatic Hydrocarbons by Oxidative Combustion and Reduced PressureChemiluminescence DetectionD7359 Test Method for Total Fluorine, Chlorine and Sulfur in Aromatic Hydrocarbons and Their Mixtures by OxidativePyrohydrolytic Combustion followed by Ion Chromatography Detection (Combustion Ion Chromatograp
9、hy-CIC)D7457 Test Method for Determining Chloride in Aromatic Hydrocarbons and Related Chemicals by MicrocoulometryD7504 Test Method for Trace Impurities in Monocyclic Aromatic Hydrocarbons by Gas Chromatography and Effective CarbonNumberD7536 Test Method for Chlorine in Aromatics by Monochromatic W
10、avelength Dispersive X-ray Fluorescence SpectrometryE29 Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications2.2 Other Document:OSHA Regulations, 29 CFR paragraphs 1910.1000 and 1910.1200 33. Properties3.1 Xylenes for p-xylene feedstock shall conform to the
11、following requirements:1 This specification is under the jurisdiction of ASTM Committee D16 on Aromatic Hydrocarbons and Related Chemicals and is the direct responsibility of SubcommitteeD16.01 on Benzene, Toluene, Xylenes, Cyclohexane and Their Derivatives.Current edition approved July 1, 2011Nov.
12、1, 2012. Published September 2011December 2012. Originally approved in 1991. Last previous edition approved in 20102011as D5211 10.D5211 11. DOI: 10.1520/D5211-11.10.1520/D5211-12.2 For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at serviceastm.o
13、rg. For Annual Book of ASTM Standardsvolume information, refer to the standards Document Summary page 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
14、 is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication 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 appr
15、opriate. In all cases only the current versionof the standard as published by ASTM is to be considered 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 Sta
16、tes1Property 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 D7504
17、Nitrogen, max, mg/kg if needed D6069 or D7184Sulfur, max, mg/kg 1.0 D7183Appearance B .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, ma
18、x, C 143 .A The p-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 accorda
19、nce with Practice 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:where:Fi = weight fraction of C8 aromatic component i in the total C8 aromatic hydrocarbon fr
20、action,Wi = weight fraction 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 t
21、he supplier and purchaser:Property ASTM Test MethodsANitrogen, max, mg/kg D6069 or 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 122SUMMARY OF CHANGE
22、SCommittee D16 has identified the location of selected changes to this standard since the last issue (D5211 11) that may impact the use of this standard. (Approved November 1, 2012.)(1) Modified Table 3.1 to eliminate non-mandatory requirements. Added 3.2 and Section 6 to indicate non-mandatory item
23、s.(2) Modified Table 6.1 to allow Test Method D7457 as an alternate method for chloride.SUMMARY OF CHANGESCommittee D16 has identified the location of selected changes to this standard since the last issue(D5211 - 10D5211 10) that may impact the use of this standard. (Approved July 1, 2011.)(1) Modi
24、fied 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 C8 aromatichydrocarbon basis.Committee D16 has identified the location of selected changes to this standard since the last issue (D5211 - 07)that may impact the us
25、e of this standard. (Approved August 1, 2010.)(1) Added methods for chloride, D7359 and D7536 in Table in 3.1.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
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28、u 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 Box C700, West Conshohocken, PA 19428-2959,United States. Individual
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