1、Designation: D5211 12D5211 16Standard 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*1.1 This specification covers xylenes for p-xylene feedstock. These xylenes typically are extracted from reformate.1.2 The following applies to all
3、 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 method
4、 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 suppliers Safety Data Sheets (MSDS),(SDS), and local regulationsfor all materials used in this specific
5、ation.2. Referenced 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 C
6、hloride in Liquid 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
7、 and Reduced PressureChemiluminescence Detection (Withdrawn 2015)3D6563 Test Method for Benzene, Toluene, Xylene (BTX) Concentrates Analysis by Gas ChromatographyD7183 Test Method for Determination of Total Sulfur in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 Me
8、thod 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 Mixtures by OxidativePyrohydrolytic Combustion followed by Ion Chromatography Detec
9、tion (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 Hydrocarbons by Gas Chromatography and Effective CarbonNumberD7536 Test Method for Chlorin
10、e 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 Conformance with Specifications2.2 Other Document:OSHA Regulations, 29 CFR para
11、graphs 1910.1000 and 1910.1200 31 This specification is under the jurisdiction ofASTM 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 Nov. 1, 2
12、012June 1, 2016. Published December 2012June 2016. Originally approved in 1991. Last previous edition approved in 20112015 asD5211 11.D5211 12. DOI: 10.1520/D5211-12.10.1520/D5211-16.2 For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at serviceastm.o
13、rg. For Annual Book of ASTM Standardsvolume information, refer to the standardsstandards 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
14、 document 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 edition
15、s as appropriate. 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. U
16、nited States13. Properties3.1 Xylenes for p-xylene feedstock shall conform to the following requirements:D5211 162Property SpecificationASTMTestMethodProperty SpecificationASTMTestMethodp-xylene,A min, weight % 18 D6563 or D7504Ethylbenzene,A max, weight % 20 D6563 or D7504Toluene, max, weight % 0.5
17、 D6563 or D7504C9 and higher boiling aromatichydrocarbons, max, weight %1.0 D6563 or D7504Nonaromatic hydrocarbons,max, weight %0.3 D6563 or D7504Sulfur, max, mg/kg 1.0 D7183Appearance B .Color, max, Pt/Co scale 20 D1209 or D5386Color, max, Pt/Co scale 20 D5386 or D8005Distillation range, at 101.3 k
18、Pa(760 mm Hg) pressure,max, C5 D850Initial distillation temperature,min, C137 .Dry point, max, 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 o
19、bserved at 18.3 to 25.6C (65 to 78F).4. Sampling4.1 The material shall be sampled in accordance 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:Fi
20、 = weight fraction of C8 aromatic component i in the total C8 aromatic hydrocarbon fraction,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-man
21、datory)6.1 The following supplementary requirements shall apply when agreed upon by the supplier and purchaser:Property ASTM Test MethodsANitrogen, max, mg/kg D6069 or D7184Nitrogen, max, mg/kg D7184Chloride D5194 or D5808 or D7359 orD7457 or D7536A If more than one method is listed, the producer an
22、d user should agree on the referee method.7. Keywords7.1 feedstock; p-xylene; xylenesD5211 163SUMMARY OF CHANGESCommittee D16 has identified the location of selected changes to this standard since the last issue (D5211 11) 12) that may impact the use of this standard. (Approved NovemberJune 1, 2012.
23、)2016.)(1) Modified Table 3.1 to eliminate non-mandatory requirements. Added 3.2 and Section 6 to indicate non-mandatoryitems.Removed D1209 and added D8005 in Section 2.(2) Modified Table 6.1 to allow Test Method D7457 as an alternate method for chloride.table in 3.1 to replace D1209 with D8005.(3)
24、Removed D6069 from Section 2(4) Modified table in 3.1 to remove D6069.Committee D16 has identified the location of selected changes to this standard since the last issue(D5211 10) that may impact the use of this standard. (Approved July 1, 2011.)(1) Modified footnote A in table in 3.1.(2) Added Sect
25、ion 5 on Calculation for ethylbenzene, para-xylene, meta-xylene, and ortho-xylene and on a C8 aromatichydrocarbon basis.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 express
26、ly 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 and must be reviewed every five years andif not revised,
27、either reapproved or withdrawn.Your comments are invited either for revision of this standard or for additional standardsand should be addressed to ASTM International Headquarters. Your comments will receive careful consideration at a meeting of theresponsible technical committee, which you may atte
28、nd. 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 Box C700, West Conshohocken, PA 19428-2959,United States. I
29、ndividual 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 Copyright Clearance Center, 222Rosewood Drive, Danvers, MA 01923, Tel: (978) 646-2600; http:/ The last approved version of this historical standard is referenced on www.astm.org.D5211 164
