Toyo Soda Manufacturing Co., Ltd.

Shinichi Imura

Ryuzo Watanabe

Yoshimichi Masuda

Mitsutaka Saito

Kazutaka Sakiyama

Kazuyuki Fukano

Nobuo Morishita

Disclosed is a process for producing metallic chromium sheets having satisfactory mechanical properties directly from metallic chromium powders by successive steps of rolling (or compacting), sintering, re-rolling and annealing.

Process for producing metallic chromium plates and sheets

In an apparatus for liquid chromatography the improvement which comprises a chromatographic column packed with a solid packing material comprising porous silica gel particles, having a specific surface area of 5 to 1500 m.sup.2 /g, an average pore diameter of 20 to 2000 A and a crosslinked polymer selected from the group consisting of polystyrene, sulfonated polystyrene, polymethyl methacrylate and polyacrylonitrile coating the surface of the fine holes of the porous silica gel particles in an amount of 5 to 50 wt.% of the polymer to silica gel particles, wherein said crosslinked polymer does not contain any extractable polymer.

Solid support for liquid chromatography

Ethylene-vinyl acetate copolymers or saponified copolymers are carboxylated by copolymerizing an alpha, beta-unsaturated carboxylic acid and/or anhydride thereof with or without at least one vinylidene monomer having the formula: ##STR1## wherein X and Y can be the same or different, and each represents hydrogen, chlorine, alkyl, acetoxy, carboxylic acid ester group or cyano; with an ethylene-vinyl acetate copolymer or a saponified copolymer thereof in the presence of a polymerization initiator in a reaction medium of an acetic acid ester or a mixture of an acetic acid ester and a lower alcohol, wherein the reaction is conducted in a heterogeneous state.

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Shinnanyo, Japan

Shinichi Imura