ASTM D7124-24 PDF

Full title and description

Standard Specification for Benzene for Use with Zeolite Based Catalysts — specification establishing compositional and quality requirements for benzene intended for use with zeolite-based catalysts, and listing required test methods and acceptance criteria for properties such as purity, sulfur and thiophene content, bromine index, water, color and related attributes.

Abstract

This specification defines the minimum acceptable chemical and physical characteristics for benzene that is to be used with zeolite-based catalysts. It references test methods for determining benzene content, total sulfur, trace thiophene, toluene and nonaromatic hydrocarbon levels, nitrogen, bromine index, water content and visual appearance (color/clarity). The standard is concise (two pages) and intended to provide purchasers, producers and laboratories with clear acceptance criteria for catalytic-grade benzene.

General information

• Status: Active.
• Publication date: Published October 15, 2024 (ASTM record shows an update November 4, 2024).
• Publisher: ASTM International.
• ICS / categories: 71.080.15 — Aromatic hydrocarbons.
• Edition / version: D7124-24 (2024 revision).
• Number of pages: 2 pages.

Scope

This specification covers benzene intended specifically for use with zeolite-based catalysts; it prescribes which chemical and physical tests are to be performed to determine conformance (including benzene wt%, total sulfur, trace thiophene, toluene, nonaromatic hydrocarbons, nitrogen, acid-wash color, bromine index, water and general appearance). It is applicable where catalytic performance and catalyst health depend on feedstock purity and trace contaminant limits.

Key topics and requirements

• Specification title and designation: ASTM D7124-24.
• Primary focus on benzene quality for zeolite catalyst feedstock (purity and low levels of sulfur/heteroatom contaminants).
• Mandatory or referenced test methods for: benzene wt%, total sulfur, trace thiophene, toluene, nonaromatic hydrocarbons, nitrogen, bromine index, water (Karl Fischer or referenced methods), and visual appearance/color.
• Acceptance limits and rounding/conformance rules referenced to ASTM E29 (significant digits) as applicable.
• Short document (2 pages) intended to be used with referenced test methods and laboratory procedures for verification.

Typical use and users

Producers and suppliers of industrial aromatic chemicals, catalyst manufacturers and licensors, refinery and petrochemical quality-control laboratories, purchasers specifying feedstock for catalytic processes, contract testing laboratories, and regulatory or procurement specialists who require a concise specification for benzene used with zeolite catalysts.

Related standards

This specification is part of ASTM committee D16 activity (Aromatic, Industrial, Specialty and Related Chemicals) and continues the D7124 series (previous edition D7124‑19). It references and is used alongside analytical and test-method standards for aromatic hydrocarbons such as methods for trace thiophene, total sulfur, bromine index, water by Karl Fischer and appearance/color test methods (see referenced test methods listed in the specification).

Keywords

benzene, zeolite catalyst, purity, sulfur, thiophene, bromine index, water content, ASTM D7124, aromatic hydrocarbons, feedstock specification

FAQ

Q: What is this standard?

A: ASTM D7124-24 is a short specification that sets compositional and quality requirements for benzene intended for use with zeolite-based catalysts, and identifies the test methods used to demonstrate conformance.

Q: What does it cover?

A: It covers required analyses and acceptance criteria for properties such as benzene weight percent, total sulfur, trace thiophene, toluene and nonaromatic hydrocarbons, nitrogen, acid-wash color, bromine index, water content and appearance. The specification itself references the appropriate ASTM test methods to perform those measurements.

Q: Who typically uses it?

A: Chemical producers, refiners and petrochemical suppliers, catalyst manufacturers and licensors, QA/QC laboratories, contract testing labs and buyers that need to ensure benzene feedstock is suitable for use with zeolite catalysts.

Q: Is it current or superseded?

A: It is current and listed as active in the ASTM catalog as D7124-24 (2024). This 2024 revision supersedes earlier editions in the D7124 series (for example D7124‑19).

Q: Is it part of a series?

A: Yes — it is part of the D7124 designation series (periodic revisions), and sits within ASTM Committee D16 work on aromatic hydrocarbons; it is intended to be used together with the referenced analytical test methods in the ASTM suite for aromatic hydrocarbon analysis.

Q: What are the key keywords?

A: Benzene, zeolite catalysts, purity, sulfur, thiophene, bromine index, water content, ASTM D7124.