Method for measuring non-porus surface area of carbon black

Details Method for measuring non-porus surface area of carbon black Method for measuring non-porus surface area of carbon black

G - Physics

01

N

354/30, 73/93

G01N 30/02 (2006.01) G01N 15/08 (2006.01) G01N 30/36 (2006.01) G01N 30/74 (2006.01) G01N 30/88 (2006.01)

Patent

CA 2009703

METHOD AND APPARATUS FOR MEASURING THE NON-POROUS SURFACE AREA OF CARBON BLACK ABSTRACT OF THE DISCLOSURE An automated method for measuring the non-porous surface area of carbon black is disclosed. The method comprises passing a small sample of a CTAB-carbon black dispersion through a disposable filter to separate the carbon black with adsorbed CTAB from the filtrate containing unadsorbed CTAB. The filtrate next passes through a measuring loop and a high pressure liquid chromatography column to separate the CTAB from the other filtrate components. The CTAB is next sensed by a detector and an integrator calculates the amount of CTAB adsorbed by the carbon black and the non-porous surface area of the carbon black. The integrated apparatus for carrying out this method is also described. Once the carbon black and the CTAB are mixed, there is no further handling of the sample. The system is entirely automated and takes only a few minutes for the CTAB area determination. Measuring temperatures can also be fixed. This results in much more reproducible CTAB numbers for a particular carbon black.

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