This specification covers benzene for cyclohexane feedstock. Different tests shall be performed in order to determine the following properties of cyclohexane feedstock: benzene content, sulfur content, thiophene content, toluene plus methylcyclohexane content, methylcyclopentane content, N-hexane content, acid wash color, appearance, color, water content, and solidification point with anhydrous basis.
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1.1 This specification covers benzene for cyclohexane feedstock.
1.2 The following applies to all specified limits in this standard: for purposes of determining conformance with this standard, 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.
1.3 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.
1.4 Consult current OSHA regulations supplier's Material Safety Data Sheets for all materials used in this specification.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
D848 Test Method for Acid Wash Color of Industrial Aromatic Hydrocarbons
D852 Test Method for Solidification Point of Benzene
D1209 Test Method for Color of Clear Liquids (Platinum-Cobalt Scale)
D1685 Test Method for Traces of Thiophene in Benzene by Spectrophotometry
D3437 Practice for Sampling and Handling Liquid Cyclic Products
D4017 Test Method for Water in Paints and Paint Materials by Karl Fischer Method
D4492 Test Method for Analysis of Benzene by Gas Chromatography
D4735 Test Method for Determination of Trace Thiophene in Refined Benzene by Gas Chromatography
D5386 Test Method for Color of Liquids Using Tristimulus Colorimetry
D5713 Test Method for Analysis of High Purity Benzene for Cyclohexane Feedstock by Capillary Gas Chromatography
D6875 Test Method for Solidification Point of Industrial Organic Chemicals by Thermistor
D7011 Test Method for Determination of Trace Thiophene in Refined Benzene by Gas Chromatography and Sulfur Selective Detection
D7183 Test Method for Determination of Total Sulfur in Aromatic Hydrocarbons and Related Chemicals by Ultraviolet Fluorescence
D7375 Test Method for Trace Quantities of Water in Aromatic Hydrocarbons and Their Mixtures by Coulometric Karl Fischer Titration
D7504 Test Method for Trace Impurities in Monocyclic Aromatic Hydrocarbons by Gas Chromatography and Effective Carbon Number
E29 Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications
benzene; cyclohexane feedstock; purity;
ICS Number Code 71.040.01 (Analytical chemistry in general); 71.080.01 (Organic chemicals in general)
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