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ASTM D1157-23

Current Revision

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

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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.


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.

SDO ASTM: ASTM International
Document Number D1157
Publication Date March 1, 2023
Language en - English
Page Count 3
Revision Level 23
Supercedes
Committee D02.D0.04
Publish Date Document Id Type View
March 1, 2023 D1157-23 Revision
Dec. 1, 2019 D1157-91R19 Reaffirmation
May 1, 2014 D1157-91R14 Reaffirmation
July 1, 2009 D1157-91R09 Reaffirmation
Nov. 1, 2004 D1157-91R04 Reaffirmation
Jan. 1, 2000 D1157-91R00E01 Reaffirmation