GB/T 24200-2009Determination of phenol and homologues contents of crude phenol (English PDF)

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 and 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