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ASTM D1157-23

(Test Method)

Standard Test Method for Total Inhibitor Content (TBC) of Light Hydrocarbons

Standard Test Method for Total Inhibitor Content (TBC) of Light Hydrocarbons

SIGNIFICANCE AND USE
4.1 p-tertiary-butylcatechol is commonly added to commercial butadiene in amounts of 50 mg/kg to 250 mg/kg as an oxidation inhibitor. This test method is suitable for use by both producers and users of butadiene within the limitations described in Section 1.
SCOPE
1.1 This test method covers the determination of total p-tertiary-butylcatechol inhibitor added to polymerization and recycle grades of butadiene or to other C4 hydrocarbon mixtures containing no phenolic material other than catechol or no oxidized phenolic material other than that derived from oxidation of catechol. In general, all phenols and their quinone oxidation products are included in the calculated catechol content. Small amounts of polymer do not interfere. This test method is applicable over the range of TBC from 50 mg/kg to 500 mg/kg.  
1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.  
1.3 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.  
1.3.1 The user is advised to obtain LPG safety training for the safe operation of this test method procedure and related activities.  
1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

General Information

Status
Published
Publication Date
28-Feb-2023
ICS
71.080.01 - Organic chemicals in general
Technical Committee
D02 - Petroleum Products, Liquid Fuels, and Lubricants
Drafting Committee
D02.D0.04 - C4 and C5 Hydrocarbons
Current Stage
Ref Project

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Standards Content (Sample)

This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation: D1157 − 23
Standard Test Method for
1,2
Total Inhibitor Content (TBC) of Light Hydrocarbons
This standard is issued under the fixed designation D1157; 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* 2. Referenced Documents
3
1.1 This test method covers the determination of total 2.1 ASTM Standards:
p-tertiary-butylcatechol inhibitor added to polymerization and D1265 Practice for Sampling Liquefied Petroleum (LP)
recycle grades of butadiene or to other C hydrocarbon Gases, Manual Method
4
mixtures containing no phenolic material other than catechol or
3. Summary of Test Method
no oxidized phenolic material other than that derived from
oxidation of catechol. In general, all phenols and their quinone 3.1 The catechol is separated from the butadiene by evapo-
oxidation products are included in the calculated catechol ration. The residue is dissolved in water and an excess of ferric
content. Small amounts of polymer do not interfere. This test chloride is added. The intensity of the yellow-colored complex
method is applicable over the range of TBC from 50 mg ⁄kg to is compared in a photoelectric colorimeter with that produced
500 mg ⁄kg. by known concentrations of the catechol.
1.2 The values stated in SI units are to be regarded as
4. Significance and Use
standard. No other units of measurement are included in this
4.1 p-tertiary-butylcatechol is commonly added to commer-
standard.
cial butadiene in amounts of 50 mg ⁄kg to 250 mg ⁄kg as an
1.3 This standard does not purport to address all of the
oxidation inhibitor. This test method is suitable for use by both
safety concerns, if any, associated with its use. It is the
producers and users of butadiene within the limitations de-
responsibility of the user of this standard to establish appro-
scribed in Section 1.
priate safety, health, and environmental practices and deter-
5. Apparatus
mine the applicability of regulatory limitations prior to use.
1.3.1 The user is advised to obtain LPG safety training for
5.1 Photometer—A sensitive photoelectric photometer ca-
the safe operation of this test method procedure and related
pable of producing light of narrow spectral range that is
activities.
predominantly blue (425 nm).
1.4 This international standard was developed in accor-
5.2 Graduates, 100 mL.
dance with internationally recognized principles on standard-
5.3 Volumetric Flasks, 100 mL; or stoppered graduated
ization established in the Decision on Principles for the
mixing cylinder, 100 mL.
Development of International Standards, Guides and Recom-
mendations issued by the World Trade Organization Technical
5.4 Erlenmeyer Flasks, 250 mL.
Barriers to Trade (TBT) Committee.
5.5 Funnels, 75 mm diameter.
5.6 Pipet, 5 mL.
1
This test method is under the jurisdiction of ASTM Committee D02 on
6. Reagents
Petroleum Products, Liquid Fuels, and Lubricantsand is the direct responsibility of
6.1 Purity of Reagents—Reagent grade chemicals shall be
Subcommittee D02.D0.04 on C4 and C5 Hydrocarbons.
Current edition approved March 1, 2023. Published June 2023. Originally
used in all tests. Unless otherwise indicated, it is intended that
approved in 1951. Last previous edition approved in 2019 as D1157 – 91 (2019).
DOI: 10.1520/D1157-23.
2 3
This test method was derived from the method developed and cooperatively For referenced ASTM standards, visit the ASTM website, www.astm.org, or
tested by the Butadiene Producers’ Committee on Specifications and Methods of contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Analysis of the Office of Rubber Reserve, which appears in the Butadiene Standards volume information, refer to the standard’s Document Summary page on
Laboratory Manual as Method 2.1.9.1. the ASTM website.
*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

---------------------- Page: 1 ----------------------
D1157 − 23
all reagents shall conform to the specifications of the Commit- and observing the same time limits. Record the difference as
tee on Analytical Reagents of the American Chemical Society, the respective “net” absorbance. Assuming 1.0 mL of the
4
where such specifications are available. Other grades may be standard catechol solution to be equal to 100 mg ⁄kg of catechol
used, provided it is first ascertained that the reage
...

This 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. 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: D1157 − 91 (Reapproved 2019) D1157 − 23
Standard Test Method for
1,2
Total Inhibitor Content (TBC) of Light Hydrocarbons
This standard is issued under the fixed designation D1157; 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 Scope*
1.1 This test method covers the determination of total p-tertiary-butylcatechol inhibitor added to polymerization and recycle
grades of butadiene or to other C hydrocarbon mixtures containing no phenolic material other than catechol or no oxidized
4
phenolic material other than that derived from oxidation of catechol. In general, all phenols and their quinone oxidation products
are included in the calculated catechol content. Small amounts of polymer do not interfere. This test method is applicable over the
range of TBC from 50 mg ⁄kg to 500 mg ⁄kg.
1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.3 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, health, and environmental practices and determine the applicability of
regulatory limitations prior to use.
1.3 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, health, and environmental practices and determine the applicability of
regulatory limitations prior to use.
1.3.1 The user is advised to obtain LPG safety training for the safe operation of this test method procedure and related activities.
1.4 This international standard was developed in accordance with internationally recognized principles on standardization
established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued
by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
2. Referenced Documents
3
2.1 ASTM Standards:
D1265 Practice for Sampling Liquefied Petroleum (LP) Gases, Manual Method
3. Summary of Test Method
3.1 The catechol is separated from the butadiene by evaporation. The residue is dissolved in water and an excess of ferric chloride
is added. The intensity of the yellow-colored complex is compared in a photoelectric colorimeter with that produced by known
concentrations of the catechol.
1
This test method is under the jurisdiction of ASTM Committee D02 on Petroleum Products, Liquid Fuels, and Lubricantsand is the direct responsibility of Subcommittee
D02.D0.04 on C4 and C5 Hydrocarbons.
Current edition approved Dec. 1, 2019March 1, 2023. Published December 2019June 2023. Originally approved in 1951. Last previous edition approved in 20142019 as
D1157 – 91 (2014).(2019). DOI: 10.1520/D1157-91R19.10.1520/D1157-23.
2
This test method was derived from the method developed and cooperatively tested by the Butadiene Producers’ Committee on Specifications and Methods of Analysis
of the Office of Rubber Reserve, which appears in the Butadiene Laboratory Manual as Method 2.1.9.1.
3
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM 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.
*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

---------------------- Page: 1 ----------------------
D1157 − 23
4. Significance and Use
4.1 p-tertiary-butylcatechol is commonly added to commercial butadiene in amounts of 50 mg ⁄kg to 250 mg ⁄kg as an oxidation
inhibitor. This test method is suitable for use by both producers and users of butadiene within the limitations described in Section
1.
5. Apparatus
5.1 Photometer—A sensitive photoelectric photometer capable of producing light of narrow spectral range that is predominantly
blue (425 nm).
5.2 Graduates, 100 mL.
5.3 Volumetric Flasks, 100 mL; or stoppered graduated mixing cylinder, 100 mL.
5.4 Erlenmeyer Flasks, 250 mL.
5.5 Funnels, 75 mm diameter.
5.6 Pipet, 5 mL.
6. Reagents
6.1 Purity of Reagents—Reagent grade chemicals
...

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Note 1: Other ASTM test methods using melting (or freezing point) data to indicate sample purity are Test Methods D852 and D6875.  
5.2 The relatively simple and rapid test prescribed in this test method shows the sample under test to be either more or less pure than the standard sample. For specification purposes, a minimum allowable purity can be assured by setting limits on the differences in final melting points and the melting ranges between the standard sample and the sample under test.
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1.3 This test method is not directly applicable to opaque materials or to noncrystalline materials such as waxes, fats, and fatty acids.  
1.4 Review the current Safety Data Sheets (SDS) for detailed information concerning toxicity, first aid procedures, handling, and safety precautions.  
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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.  
1.7 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

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ASTM
ASTM D6875-23(Test Method)
Standard Test Method for Solidification Point of Industrial Organic Chemicals by Thermistor

SIGNIFICANCE AND USE
5.1 This test method may be used for process control during the manufacture of organic chemicals described in Section 1, for setting specifications, for development and research work, and to determine if contamination was introduced during shipment.
SCOPE
1.1 This test method covers a general procedure for determining the solidification point of most organic chemicals having appreciable heats of fusion and solidification points between 4 °C and 41 °C.
Note 1: Other test methods for determining freeze point and solidification point of aromatic hydrocarbons include Test Methods D852, D1015, D1016, D3799, D4493, and D6269.  
1.2 This test method is applicable to relatively pure compounds only. Solidification point depression is dependent on impurity concentrations.  
1.3 The following applies to all specified limits in this test method: for purposes of determining conformance with applicable specifications using this test method, an observed value or a calculated value shall be rounded off “to the nearest unit” in the last right hand digit used in expressing the specification limit, in accordance with the “rounding-off method” of Practice E29.  
1.4 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.  
1.5 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use. For a specific hazard statement, see Section 8, Hazards.  
1.6 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

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