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ASTM D7125-04

(Specification)

Standard Specification for Cumene (Isopropylbenzene) Manufactured Via a Zeolite Process

Standard Specification for Cumene (Isopropylbenzene) Manufactured Via a Zeolite Process

SCOPE
1.1 This specification covers cumene (isopropylbenzene) manufactured using a zeolite catalyst process.
1.2 The following applies to all specified limits in this specification: for purposes of determining conformance with this specification, 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 E 29.
1.3 Consult current OSHA Regulations and Supplier's Material Safety Data Sheets, and local regulations for all materials used in this specification.

General Information

Status
Historical
Publication Date
30-Nov-2004
ICS
71.080.15 - Aromatic hydrocarbons
Technical Committee
D16 - Aromatic, Industrial, Specialty and Related Chemicals
Drafting Committee
D16.07 - Styrene, Ethylbenzene and C9 and C10 Aromatic Hydrocarbons
Current Stage
Ref Project

Relations

Replaced By
ASTM D7125-07 - Standard Specification for Cumene (Isopropylbenzene) Manufactured Via a Zeolite Process
Effective Date
01-Jun-2007

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ASTM D7125-04 - Standard Specification for Cumene (Isopropylbenzene) Manufactured Via a Zeolite ProcessASTM D7125-04 - Standard Specification for Cumene (Isopropylbenzene) Manufactured Via a Zeolite Process
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ASTM D7125-04 - Standard Specification for Cumene (Isopropylbenzene) Manufactured Via a Zeolite Process
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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn. Please
contact ASTM International (www.astm.org) for the latest information.
Designation: D 7125 – 04
Standard Specification for
Cumene (Isopropylbenzene) Manufactured Via a Zeolite
Process
This standard is issued under the fixed designation D 7125; 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 (e) indicates an editorial change since the last revision or reapproval.
1. Scope D 7057 Test Method for Analysis of Isopropylbenzene
(Cumene) by Gas Chromatography (External Standard)
1.1 This specification covers cumene (isopropylbenzene)
E29 Practice for Using Significant Digits in Test Data to
manufactured using a zeolite catalyst process.
Determine Conformance with Specifications
1.2 The following applies to all specified limits in this
E 298 Test Methods for Assay of Organic Peroxides
specification: for purposes of determining conformance with
E 299 Test Method for Trace Amounts of Peroxides in
this specification, an observed value or a calculated value shall
Organic Solvents
be rounded off “to the nearest unit” in the last right-hand digit
2.2 Other Documents:
used in expressing the specification limit, in accordance with
OSHA Regulations, 29 CFR, paragraphs 1910.1000 and
the rounding-off method of PracticeE29.
1910.1200
1.3 Consult current OSHA Regulations and Supplier’s Ma-
terial Safety Data Sheets, and local regulations for all materials
3. Properties
used in this specification.
3.1 Cumene (isopropylbenzene) manufactured via a cata-
2. Referenced Documents lytic zeolite process shall conform to the following require-
ments:
2.1 ASTM Standards:
ASTM Test
D 1209 Test Method for Color of Clear Liquids (Platinum-
Specifications
A
Property Method
Cobalt Scale)
D 1492 Test Method for Bromine Index of Aromatic Hy- Purity, weight %, min 99.93 D 3760 or D 7057
Alpha-Methylstrene, mg/kg, max 50 D 3760 or D 7057
drocarbons by Coulometric Titration
Benzene, mg/kg, max 10 D 3760 or D 7057
D 2710 Test Method for Bromine Index Petroleum Hydro-
Cumene hydroperoxide, at loading, mg/kg, 100 E 298 or E 299
carbons by Electrometric Titration max
Diisopropylbenzenes, Individual Isomer, 5 D 3760 or D 7057
D 3160 Test Method for Phenol Content of Cumene (Iso-
mg/kg, max
propylbenzene) or AMS (a-Methylstyrene)
Diisopropylbenzenes, Total, mg/kg, max 10 D 3760 or D 7057
D 3437 Practice for Sampling and Handling Liquid Cyclic
Ethylbenzene, mg/kg, max 50 D 3760 or D 7057
i-Butylbenzene, mg/kg, max 10 D 3760 or D 7057
Products
n-Butylbenzene, mg/kg, max 10 D 3760 or D 7057
D 3760 Test Method for Analysis of Isopropylbenzene
s-Butylbenzene, mg/kg, max 20 D 3760 or D 7057
(Cumene) by Gas Chromatography t-Butylbenzene, mg/kg, max 25 D 3760 or D 7057
Phenols, mg/kg, max 5 D 3760 or D 7057
D 3961 Test Method for Trace Quantities of Sulfur in
n-Propylbenzene, mg/kg, max 300 D 3760, D 3160 or
Liquid Aromatic Hydrocarbons by Oxidative Microcou-
D 7057
lometry Sulfur, mg/kg, max 0.1 D 3961 or D 4045
Toluene, mg/kg, max 10 D 3760 or D 7057
D 4045 Test Method for Sulfur in Petroleum Products by
Total Butylbenzenes, mg/kg, max 65 D 3760 or D 7057
Hydrogenolysis and Rateometric Colorimetry
Total Cymenes, mg/kg, max 50 D 3760 or D 7
...

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5.1 This test method is suitable for setting specifications on the materials referenced in 1.2 and for use as an internal quality control tool where isopropylbenzene is produced or is used in a manufacturing process. It may also be used in development or research work involving isopropylbenzene.  
5.2 This test method is useful in determining the purity of isopropylbenzene with normal impurities present. If extremely high boiling or unusual impurities are present in the isopropylbenzene, this test method would not necessarily detect them and the purity calculation would be erroneous.  
5.3 Cumene hydroperoxide, if present, will yield thermal decomposition products, primarily AP and DMPC as stated in 4.1, that will elute in the chromatogram thereby giving incorrect results unless they are excluded as indicated in 4.1. It is also possible to get erroneous results for trace alpha-methylstyrene present in isopropylbenzene if the inlet has become unduly contaminated with non-volatile foreign substances.  
5.4 The nonaromatic hydrocarbons commonly present from the isopropylbenzene manufacturing process, particularly a non-zeolitic one, will interfere with the determination of xylenes (if present).
SCOPE
1.1 This test method covers the determination of the purity of isopropylbenzene (cumene) by gas chromatography. Calibration of the gas chromatography system is done by the external standard calibration technique.  
1.2 This test method has been found applicable to the measurement of impurities such as nonaromatic hydrocarbons, benzene, toluene, ethylbenzene, phenol, cymenes, t-butylbenzene, n-butylbenzene, n-propylbenzene, alpha-methylstyrene, sec-butylbenzene, and diisopropylbenzenes, which are impurities that can be found in isopropylbenzene. The latter impurities can be analyzed over a range of 1 mg/kg to 500 mg/kg by this method (see Table 1). The limit of quantitation averages 3.8 mg/kg while the limit of detection for these impurities averages 1.1 mg/kg based on the data in Table 1.  
1.3 In determining the conformance of the test results using this method to applicable specifications, results shall be rounded off 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 specific hazard statements, see Section 9.  
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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