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GB/T 24200-2009: Determination of phenol and homologues contents of crude phenol
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GB/T 24200-2009: Determination of phenol and homologues contents of crude phenol

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Determination of phenol and homologues contents of crude phenol ICS 71.080.90 G17 National Standards of People's Republic of China Determination of phenol and homologues Content crude phenol Posted 2009-07-08 2010-04-01 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released

Foreword

The standard proposed by China Iron and Steel Association. This standard is under the jurisdiction of the National Steel Standardization Technical Committee. This standard was drafted. Inner Mongolia Baotou Steel Gangliangufen Co., Metallurgical Industry Information Standards Institute. The main drafters of this standard. ZHAO Yong, Zhang Tong Shan Jiang Xin, Zhangbing Yu, paragraph Sulan, Sun Wei. Determination of phenol and homologues Content crude phenol Warning. toluene, xylene, skin and eye irritation, there is risk of inhalation of toxic gases or invade the skin, to wear protective masks, protective eye Goggles and protective gloves, test operations to be carried out in a forced air hood, keep a distance from the source of fire.

1 Scope

This standard specifies the principles of the crude phenol and phenol homologues content determination, reagents and instruments, test procedures, the results of the calculation precision. This standard applies to the determination of high temperature coal tar fractionation resulting crude phenol and its homologues of phenol content.

2 Normative references

The following documents contain provisions which, through reference in this standard and become the standard terms. For cited documents with dates, with its After all of the amendments (not including errata content) or revisions do not apply to this standard, however, encourage each agreement in accordance with this standard Are Prescriptions can use the latest versions of these documents. For undated reference documents, the latest versions apply to this standard. GB/T 8170 repair value expressed about the rules and limit values \u200b\u200band judgment YB/T 2305 coking products Glass thermometers

3 Test principle

Take a certain amount of sample, kerosene - xylene mixture as a substrate solution, distilled, evaporated after all distillate with a base effect generated sodium phenol, Lye ml increments multiplied by its average density, in terms of the mass fraction of phenol and homologs. The reaction is as follows. C6H5OH + NaOH → C6H5ONa + H2O

4 Reagents and Instruments

4.1 Kerosene - xylene. 5 parts of xylene was mixed with 3 parts kerosene (kerosene must first washed 30% sulfuric acid, according to the proportion of 1.1, after separation 10% sodium hydroxide and, according to the proportion of 1.1, after separation by distillation cut 200 ℃ ~ 300 ℃ distillate). 4.2 Toluene. AR. 4.3 Sodium chloride. AR, 400 ℃ burning dehydration 1h. 4.4 Sodium hydroxide solution. 10% (mass fraction) solution, saturated with sodium chloride, the use of filtration. 4.5 retort. \u200b\u200bcopper volume 150mL, wall thickness of not more than 2mm, shown in Figure 1. Note. Allow the use of benzene retorts. Millimeters Figure 1 retort ...