B - Operations – Transporting – 01 – J
Patent
B - Operations, Transporting
01
J
B01J 20/32 (2006.01) B01D 15/08 (2006.01) G01N 30/48 (1990.01)
Patent
CA 2102425
2102425 9215385 PCTABS00016 A chromatographic packing material includes a coated support material which is a chromatographically suitable substrate. An immobilized butadiene acrylonitrile polymer coating is provided on the substrate. The copolymer can be crosslinked by gamma radiation, or by means of a crosslinking agent such as dicumyl peroxide. The support material can be silica, alumina, diatomaceous earth, zeolite, porous glass or carbon, but preferably is spherical lamellar shaped crystals of aluminum hydroxide. The aluminum hydroxide crystals are bonded together at a central core and extend radially outwardly from a central core with a particle density ranging from 0.3 to 2.5 g/cm3 and a diameter of 2 to 150 microns. The organic materials are separated by providing a bed of packing material selected from the group consisting of silica and alumina, diatomaceous earth, zeolite and porous glass with a polymeric coating being bonded thereto. Organic materials are introduced to the bed, and an eluting fluid is added. The fluid and one of the organic materials are removed from bed, and the materials are then separated and removed from the fluid. A chromatographic packing material is disclosed comprising a coated support material which is a chromatographically suitable substrate, with an uniform immobilized functionalized coating. A chromatographic column is disclosed having a stationary phase with a suitable substrate coated support material and an uniform immobilized functionalized coating. A stationary phase for reversed-phase liquid chromatography consisting of a crosslinked, polybutadiene-coated, macroporous, alumina substrate is disclosed wherein the micropores have a diameter predominantely in the range of 50 to 1000 Angstroms, and the alumina substrate is so occludingly coated with polybutadiene that the integrity of the stationary phase is not adversely affected by extended exposure to liquid environments having a pH of 12. The method for preparing a stationary phase for liquid chromatography by occludingly coating onto a macroporous alumina substrate having micropores of a diameter predominantely in the range of 90 to 500 Angstroms, an unsaturated polybutadiene oligomer having pendant vinyl groups and a molecular weight less than 50,000 Daltons. The polybutadiene oligomer is partially crosslinked to the substrate to provide a polybutadiene coating having pendant vinyl groups. The hydrophobicity of the polybutadiene coating is increased by providing alkyl groups onto said polybutadiene coating, so that the retention time of o-xylene is increased by at least 30 % over retention time of a stationary phase coated with polybutadiene having 18 mole percent vinyl groups per butadiene unit.
Holland Kevin B.
Mcclanahan Christopher
Simon Ethan S.
Holland Kevin B.
Marks & Clerk
Mcclanahan Christopher
Simon Ethan S.
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