GB/T 3780.26-2018Carbon black—Part 26: Determination of carbon content in carbon black feedstock oils (English PDF)

Foreword

GB/T 3780 "carbon black" is divided into the following parts.

--- Part 1. Test method for iodine absorption;

--- Part 2. Determination of oil absorption values;

--- Part 4. Determination of the oil absorption value of compressed specimens;

---Part 5. Determination of specific surface area CTAB method;

---Part 6. Determination of color strength;

--- Part 7. Determination of pH;

--- Part 8. Determination of heating loss;

--- Part 10. Determination of ash;

--- Part 12. Inspection of impurities;

--- Part 14. Determination of sulfur content;

---Part 15. Determination of light transmittance of toluene extracts;

--- Part 17. Indirect measurement of particle size reflectance method;

---Part 18. Identification methods in natural rubber (NR);

--- Part 21. Determination of sieve residue water rinse method;

--- Part 22. Calculating process capability index using process control data;

--- Part 23. Sampling and identification of fugitive carbon black or other environmental particles;

--- Part 24. Determination of void volume;

---Part 25. Determination of carbon content;

--- Part 26. Determination of carbon content in carbon black feedstocks.

This part is the 26th part of GB/T 3780.

This part is drafted in accordance with the rules given in GB/T 1.1-2009.

1 Scope

This part of GB/T 3780 specifies the method for determining the carbon content of carbon black feedstock oil by instrument.

This section applies to petroleum black materials from petroleum, coal and other fuels, residues, asphalt, reclaimed oil, etc., which are usually processed into liquids. oil. Its carbon content is usually 75% to 94%.

2 Normative references

The following documents are indispensable for the application of this document. For dated references, only dated versions apply to this document. For undated references, the latest edition (including all amendments) applies to this document.

GB/T 4756 petroleum liquid manual sampling method

GB/T 8170 Numerical Rounding Rules and Representation and Determination of Limit Values

3 Principle

The raw material oil was weighed by a combustion boat covered with a tungsten oxide accelerator, and the sample was placed in a tube furnace at 1350 ° C by a combustion boat, and the sample was empty.

The carbon content is determined by complete combustion in gas or oxygen-enriched air. The carbon in the sample is completely oxidized to carbon dioxide. Air flow through the filling of magnesium perchlorate The trap, removes water vapor and particulates, and passes through the detection cell and is measured by an infrared (IR) absorption detector at the exact infrared spectral wavelength. Carbon dioxide concentration.

4 Instruments

4.1 Analytical balance with a graduation value of 0.1 mg.

5 Reagents and materials

5.1 Magnesium perchlorate, analytically pure.