ASTM D6563-11a
(Test Method)Standard Test Method for Benzene, Toluene, Xylene (BTX) Concentrates Analysis by Gas Chromatography
Standard Test Method for Benzene, Toluene, Xylene (BTX) Concentrates Analysis by Gas Chromatography
SIGNIFICANCE AND USE
This test method was primarily developed to determine benzene, toluene, and xylenes in chemical intermediate and solvent streams such as reformate, BTX extracts, pyrolysis gasoline, hydrogenated pyrolysis gasoline, crude benzene, crude ethylbenzene, commercial toluene, and light blending aromatic feedstocks. This test method may not detect all components and there may be unknown components that would be assigned inappropriate response factors and thus, the results may not be absolute.
The relative distribution of C8 aromatics is useful for determining conformance to p-xylene feedstock specifications.
SCOPE
1.1 This test method covers the determination of the total nonaromatic hydrocarbons, benzene, toluene, ethylbenzene, xylenes, and total C9 + aromatic hydrocarbons in BTX concentrates by capillary column gas chromatography. This test method is applicable to materials with a final boiling point below 215°C.
1.2 This test method may also be used to determine the relative distribution of the individual C8 aromatic hydrocarbon isomers in mixed xylenes.
1.3 Individual components can be determined from 0.01 to 90 %.
1.4 In determining the conformance of the test results using this method to applicable specifications, results shall be rounded off in accordance with the rounding-off method of Practice E29.
1.5 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.6 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. For a specific precautionary statement, see Section 9.
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Designation: D6563 − 11a
Standard Test Method for
Benzene, Toluene, Xylene (BTX) Concentrates Analysis by
1
Gas Chromatography
This standard is issued under the fixed designation D6563; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope* D6809 Guide for Quality Control and Quality Assurance
Procedures for Aromatic Hydrocarbons and Related Ma-
1.1 This test method covers the determination of the total
terials
nonaromatic hydrocarbons, benzene, toluene, ethylbenzene,
E29 Practice for Using Significant Digits in Test Data to
xylenes, and total C + aromatic hydrocarbons in BTX con-
9
Determine Conformance with Specifications
centrates by capillary column gas chromatography. This test
E355 Practice for Gas ChromatographyTerms and Relation-
method is applicable to materials with a final boiling point
ships
below 215°C.
E691 Practice for Conducting an Interlaboratory Study to
1.2 This test method may also be used to determine the
Determine the Precision of a Test Method
relative distribution of the individual C aromatic hydrocarbon
8
E1510 Practice for Installing Fused Silica Open Tubular
isomers in mixed xylenes.
Capillary Columns in Gas Chromatographs
1.3 Individual components can be determined from 0.01 to 2.2 Other Documents:
90 %.
OSHA Regulations, 29 CFR paragraphs 1910.1000 and
3
1910.1200
1.4 In determining the conformance of the test results using
this method to applicable specifications, results shall be
3. Terminology
rounded off in accordance with the rounding-off method of
3.1 Definitions of Terms Specific to This Standard:
Practice E29.
3.1.1 extracted reformate, n—an aromatic concentrate ob-
1.5 The values stated in SI units are to be regarded as
tained by solvent extraction of reformate.
standard. No other units of measurement are included in this
3.1.2 reformate, n—the product of a catalytic process that
standard.
increases the concentration of aromatic hydrocarbons.
1.6 This standard does not purport to address all of the
3.1.3 pyrolysis gasoline, n—depentanizedby-productrecov-
safety concerns, if any, associated with its use. It is the
ered from ethylene manufacture.
responsibility of the user of this standard to establish appro-
priate safety and health practices and determine the applica- 3.1.4 synthetic blend, n—blendofreagenthydrocarbonsthat
bility of regulatory limitations prior to use. For a specific simulate a process product.
precautionary statement, see Section 9.
3.1.5 hydrogenated pyrolysis gasoline, n—pyrolysis gaso-
line that has been treated with hydrogen to reduce the olefins
2. Referenced Documents
content.
2
2.1 ASTM Standards:
3.1.6 crude ethylbenzene, n—product produced from the
D3437 Practice for Sampling and Handling Liquid Cyclic
reaction of impure fluid cat cracking, (FCC) ethylene and
Products
benzene.
3.1.6.1 Discussion—It typically contains greater than 40 %
of ethylbenzene and benzene.
1
This test method is under the jurisdiction of ASTM Committee D16 on
3.1.7 light blending aromatics feedstock, n—light aromatics
Aromatic Hydrocarbons and Related Chemicals and is the direct responsibility of
Subcommittee D16.01 on Benzene, Toluene, Xylenes, Cyclohexane and Their
fraction (with high amounts of benzene and toluene) typically
Derivatives.
recovered from the isomerization of a p-xylene or m-xylene
Current edition approved June 1, 2011. Published June 2011. Originally
depleted C aromatics stream.
approved in 2000. Last previous edition approved in 2011 as D6463 – 11. DOI: 8
10.1520/D6563-11A.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
3
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM AvailablefromU.S.GovernmentPrintingOfficeSuperintendentofDocuments,
Standards volume information, refer to the standard’s Document Summary page on 732 N. Capitol St., NW, Mail Stop: SDE, Washington, DC 20401, http://
the ASTM website. www.access.gpo.gov.
*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
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D6563 − 11a
TABLE 1 Instrument Parameters
3.1.8 mixed xylenes, n—a mixture of C aromatic hydrocar-
8
bon isomers including ethylbenzene, but excluding stryene. Column 50 or 60 m by 0.25 mm ID bonded
polyethylene glycol-fused silica capillary,
internally coated to a 0.25-µm thickness
4. Summary of Test Method
Carrier gas helium
Flow, linear velocity at 70°C, cm/s 20
4.1 The specimen to be analyzed is injected into a gas
Split ratio 200:1
chromatographequippedwithaflameionizationdetector(FID)
Detector gas
and a capillary column. The peak area of each component is
Hydrogen flow rate, mL/min 30
Air flow rate,
...
This document is not anASTM standard and is intended only to provide the user of anASTM standard an indication of what changes have been made to the previous version. Because
it 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 version
of the standard as published by ASTM is to be considered the official document.
Designation:D6563–11 Designation:D6563–11a
Standard Test Method for
Benzene, Toluene, Xylene (BTX) Concentrates Analysis by
1
Gas Chromatography
This standard is issued under the fixed designation D6563; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope*
1.1 This test method covers the determination of the total nonaromatic hydrocarbons, benzene, toluene, ethylbenzene, xylenes,
andtotalC +aromatichydrocarbonsinBTXconcentratesbycapillarycolumngaschromatography.Thistestmethodisapplicable
9
to materials with a final boiling point below 215°C.
1.2 This test method may also be used to determine the relative distribution of the individual C aromatic hydrocarbon isomers
8
in mixed xylenes.
1.3 Individual components can be determined from 0.01 to 90 %.
1.4 In determining the conformance of the test results using this method to applicable specifications, results shall be rounded
off in accordance with the rounding-off method of Practice E29.
1.5 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.6 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility
of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory
limitations prior to use. For a specific precautionary statement, see Section 9.
2. Referenced Documents
2
2.1 ASTM Standards:
D3437 Practice for Sampling and Handling Liquid Cyclic Products
D6809 Guide for Quality Control and Quality Assurance Procedures for Aromatic Hydrocarbons and Related Materials
E29 Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications
E355 Practice for Gas Chromatography Terms and Relationships
E691 Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method
E1510 Practice for Installing Fused Silica Open Tubular Capillary Columns in Gas Chromatographs
2.2 Other Documents:
3
OSHA Regulations, 29 CFR paragraphs 1910.1000 and 1910.1200
3. Terminology
3.1 Definitions of Terms Specific to This Standard:
3.1.1 extracted reformate, n—an aromatic concentrate obtained by solvent extraction of reformate.
3.1.2 reformate, n—the product of a catalytic process that increases the concentration of aromatic hydrocarbons.
3.1.3 pyrolysis gasoline, n—depentanized by-product recovered from ethylene manufacture.
3.1.4 synthetic blend, n—blend of reagent hydrocarbons that simulate a process product.
3.1.5 hydrogenated pyrolysis gasoline, n—pyrolysis gasoline that has been treated with hydrogen to reduce the olefins content.
3.1.6 crude ethylbenzene, n—product produced from the reaction of impure fluid cat cracking, (FCC) ethylene and benzene.
3.1.6.1 Discussion—It typically contains greater than 40 % of ethylbenzene and benzene.
3.1.7 light blending aromatics feedstock, n—light aromatics fraction (with high amounts of benzene and toluene) typically
recovered from the isomerization of a p-xylene or m-xylene depleted C aromatics stream.
8
3.1.8 mixed xylenes, n—a mixture of C aromatic hydrocarbon isomers including ethylbenzene, but excluding stryene.
8
1
This test method is under the jurisdiction ofASTM Committee D16 onAromatic Hydrocarbons and Related Chemicals and is the direct responsibility of Subcommittee
D16.01 on Benzene, Toluene, Xylenes, Cyclohexane and Their Derivatives.
Current edition approved Feb.June 1, 2011. Published FebruaryJune 2011. Originally approved in 2000. Last previous edition approved in 20102011 as D6463–05(2010)
´1. D6463 – 11. DOI: 10.1520/D6563-11A.
2
For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards
volume information, refer to the standard’s 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.
*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.
1
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D6563–11a
4. Summary of
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