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An adsorption type packing for gas chromatography composed of finely divided carbon particles in whole, and having a ratio of nitrogen gas adsorption at a relative pressure of 0.3 (V0.3) to nitrogen gas adsorption at a relative pressure of about 1.0 (V1.0) each in the adsorption isotherm of said pac

An adsorption type packing for gas chromatography composed of finely divided carbon particles in whole, and having a ratio of nitrogen gas adsorption at a relative pressure of 0.3 (V0.3) to nitrogen gas adsorption at a relative pressure of about 1.0 (V1.0) each in the adsorption isotherm of said packing, V0.3/V1.0, of 0.9 or more and a BET specific surface area of 1,000 to 2,000 m2/g; and a process for producing said packing.

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A process for producing an adsorption packing for gas chromatography consisting of finely divided carbon particles and having a ratio of nitrogen gas adsorption at a relative pressure of 0.3 (V0.3) to nitrogen gas adsorption at a relative pressure of about 1.0 (V1.0) each in the adsorption isotherm

A process for producing an adsorption packing for gas chromatography consisting of finely divided carbon particles and having a ratio of nitrogen gas adsorption at a relative pressure of 0.3 (V0.3) to nitrogen gas adsorption at a relative pressure of about 1.0 (V1.0) each in the adsorption isotherm of said packing, V0.3/V1.0′of 0.9 or more and a BET specific surface area of 1,000 to 2,000 m2/g, which consists essentially of the steps of a) preparing a slurry of (i) finely divided particles of a nonfusible and carbonizable thermosetting resin or carbonized particles thereof, at least 90% by weight having a particle diameter of 100 m5 to 100 parts by weight based on 100 parts by weight of said particles (i), and (iii) a solvent in a mixing ratio of said solvent (iii) to said thermosetting resin solution (ii) of at least 1/1; b) drying said slurry to remove the solvent (iii) whereby said finely divided particles (i) uniformly coated with said thermosetting resin (ii) are obtained; c) forming the coated particles from step b) to obtain a shaped product; d) curing said shaped product from step c) by heating at a temperature in the range of 100°to 200°C. for 1 to 5 hours to obtain a cured product; e) firing said cured product from step a) in an inert gas atmosphere at a temperature in the range of 600°to 1,000°C. to obtain a fired product; f) dividing and then classifying said fired product to obtain granular aggregates of finely divided carbon particles having a uniform particle size of 60- to 100-mesh; g) activating said aggregates from step f) at a temperature in the range of 900°to 1,000°C. for 10 to 60 minutes at a steam flow rate of 1 to 10 cc/min. to obtain activated aggregates; and h) treating said activated aggregates from step g) with an acid to neutralize the alkali formed during the activation in step g).