Method for measuring non-porous surface area of carbon black

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

1989-10-12

1990-11-13

Richman, Barry S.

Chemistry: analytical and immunological testing

Process or composition for determination of physical state...

Surface area, porosity, imperfection, or alteration

436111, 436145, 436161, 73 38, G01N 1508

Patent

active

049701690

ABSTRACT:
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.

REFERENCES:
Jay Janzen, "Specific Surface Area Measurments on Carbon Black", Published in Rubber Chemistry and Technology, 1971, vol. 44, p. 1287.
Frank C. Smith, Jr., "The Practice of Ion Chromatography", 1983, pp. 16, 32.
C. E. Stevenson, "Analysis of Penicillen by a Dual-Channel Automated Hydroxylamine Method", Published in Advances in Automated Analysis, 1969, vol. 2, p. 253.

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