Gas-chromatography packed column carrier and preparing process thereof

Abstract

The gaseous chromatographic packed column carrier features the total volume of pores in 50-10000 nm size being 0.76-0.95 mL / g and 78-98 % that of pores in 6-10000 nm size, the probable pore size of 800-1700 nm and specific pore surface area of 1-25 sq m / g. The carrier is prepared with natural diatomite and through cooling, crushing, sieving, washing and drying. When the carrier is used in gaseous chromatographic packed column, the problem of adsorbing high-carbon alkanes may be solved.

Description

technical field

[0001] The invention relates to a gas chromatography packed column carrier and a preparation method thereof, and more particularly relates to a carrier used for olefin trapping materials and a preparation method thereof. Background technique

[0002] Due to its unique porous structure and good surface properties, diatomaceous earth is widely used as a carrier for gas chromatography packed columns and for some special separations. Regarding the preparation of diatomite used as a chromatographic carrier, in Introduction to Chromatography (edited by Da Shilu, Wuhan University Press, December 1999, p226), the preparation method described is to mix diatomite and binder Calcined at 900°C.

[0003] The diatomaceous earth carrier is used in multi-dimensional chromatography to trap olefins to achieve the separation of alkanes and olefins, and to determine the composition of gasoline. For example, Martin reported in Anal.Chem.34: 896, 1962 that the mercury perchlorat...