Merck Patent Gesellschaft MIT Beschrankter Haftung

Karl-Friedrich Krebs

Herbert Halpaap

Karin Cabrera

Willi Jost

Hans Heinz

In adsorption and chromatography proceseses for the separation of at least one substance from a mixture of substances, silicon carbide is used as the adsorbent and as a support material in such processes.

Adsorbents for chromatography and adsorption processes

A separating material for thin-layer chromatography, comprising a substrate material coated with a thin sorbent layer, wherein the sorbent layer optionally contains a binder, an indicator, or both, is improved in that the sorbent layer has a surface modified by reacting the sorbent layer with a silanizing agent without the exclusion of moisture.

Separating materials for thin layer chromatography and their preparation

TLC plates having a concentrating zone located adjacent to and before a chromatography layer are improved by using as the layer for the concentrating zone a silicon dioxide of medium pore volume (e.g., 0.5-1.5 ml/g) and a pore width of 2-15 .mu.m.

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Darmstadt, Germany

Karl-Friedrich Krebs