ASTM D5194-24 PDF

Overview

ASTM D5194-24 is the internationally recognized standard titled "Standard Test Method for Trace Chloride in Liquid Aromatic Hydrocarbons," developed by ASTM International. This standard specifies a precise analytical procedure for determining trace amounts of total chloride-including both organic and inorganic forms-in liquid aromatic hydrocarbons and cyclohexane. Accurate chloride measurement is critical for the petrochemical industry, as even low levels can negatively affect chemical processes, catalysis, and equipment performance. This test method is applicable for samples with chloride concentrations ranging from 1 mg/kg to 25 mg/kg, making it suitable for quality assurance and process control.

Key Topics

• Total Chloride Determination: Provides a method to measure both organic and inorganic chloride in liquid aromatic hydrocarbons and cyclohexane.
• Sample Suitability: Applicable for samples containing chloride within the 1–25 mg/kg range.
• Interference Considerations: Bromides and iodides, if present, are calculated as chlorides. Certain materials like styrene, which polymerize under sodium biphenyl reagent, cannot be analyzed by this method.
• Safety and Compliance: Emphasizes that users must address safety, health, and environmental precautions, and comply with relevant regulatory requirements when conducting the test.

Applications

ASTM D5194-24 is widely applied in the following contexts:

• Petrochemical Production: Used by manufacturers and refiners to verify that aromatic hydrocarbons such as benzene, toluene, and xylene meet stringent chloride content specifications.
• Quality Control: Supports the ongoing quality assurance of process streams and final products by ensuring that chloride levels remain within acceptable limits, thus protecting downstream equipment and catalytic processes from chloride-induced harm.
• Specification Compliance: Helps producers and customers prove conformance with purchase specifications and regulatory requirements regarding chloride content.
• Laboratory Testing: Laboratories engaged in the analysis of industrial chemicals utilize this method for routine or investigative analyses to avoid process downtime and product contamination.

Industries benefiting from this standard include:

• Chemical manufacturing
• Petrochemical refining
• Industrial quality control laboratories
• Environmental monitoring

Related Standards

For comprehensive, accurate analyses and proper test method execution, users should be familiar with these related ASTM standards:

• ASTM D891: Test Methods for Specific Gravity of Liquid Industrial Chemicals
• ASTM D1193: Specification for Reagent Water
• ASTM D1555M: Test Method for Calculation of Volume and Weight of Industrial Aromatic Hydrocarbons and Cyclohexane
• ASTM D3437: Practice for Sampling and Handling Liquid Cyclic Products
• ASTM D4052: Test Method for Density, Relative Density, and API Gravity of Liquids by Digital Density Meter
• ASTM D6809: Guide for Quality Control and Quality Assurance Procedures for Aromatic Hydrocarbons
• ASTM E29: Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications

Practical Value

Adopting ASTM D5194-24 ensures reliable detection of trace chloride contaminants in aromatic hydrocarbon streams, preventing equipment fouling, catalysis deactivation, and undesirable reactions. Consistent application supports producers in meeting international quality benchmarks and customer requirements while maintaining regulatory compliance. This standard is a critical tool in upholding the quality and integrity of aromatic hydrocarbon products globally.