Suddeutsche Kalkstickstoff-werke Aktiengesellschaft

Horst Michaud

Josef Seeholzer

Heinrich Rock

Ludwig Pentzel

Ulrich Metz

Gunter Ortenburger

Josefa Mangs

Wilhelm Poschinger

Melamine is prepared from cyanamide and/or dicyandiamide by contacting the cyanamide and/or dicyandiamide at approximately atmospheric pressure in an organic solvent at 100.degree. to 250.degree. C with at least one solvent selected from the group having the formulas ##STR1## wherein R.sub.1 and R.sub.2 are alkyl which may be joined together to form an alkylene ring, In the simultaneous presence of alkali hydroxide or alkaline earth hydroxide.

Method of preparing melamine from cyanamide and/or dicyandiamide

Pure glycolic acid is recovered practically completely from the product obtained by hydrolysis of glycolonitrile containing at least stoichiometrically equivalent amounts of ammonium and sulfate ions by extraction with a mixture of a trialkyl phosphate and a dialkylether, preferably of equal weights of tributyl phosphate and diisopropyl ether, and separation of the glycolic acid from the extraction medium by contact with water.

Method of recovering purified glycolic acid from its contaminated

A thermosetting resin useful for attaching decorative paper facings to chipboard and like cellulosic panels is prepared by condensation of melamine with thiourea, formaldehyde, and a diol ether, up to one half by weight of the melamine being capable of being replaced by urea without seriously effecting the quality of the resin.

Melamine, formaldehyde, thiourea and diol ether thermosetting resin and

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Trostberg, Germany

Horst Michaud