Basf Aktiengesellschaft

Knut Kessel

G&uuml;nter Scherr

Thomas Bogenst&auml;tter

Manfred Patsch

Michael Kluge

Thomas Greindl

Bernhard Albert

Norbert Biedermann

Hans-Dieter Martin

Stefan Silber

Bernd Siegel

Gunther Berndl

Matthias Wiesenfeldt

Matthias Rauls

Heinz Friedrich Sutoris

J&uuml;rgen Schr&ouml;der

J&ouml;rg Breitenbach

Manfred Herrmann

Claus Marschner

Manfred Ruske

Konrad Mitulla

Dirk Franke

Stefan Orsten

Joerg L Jessen

Roland Merger

Wolfgang H&auml;hnlein

Richard Van Gelder

Hermann Uhr

Kurt Reiner

Jorg Jessen

A process for the preparation of creatine or creatine monohydrate by reaction of sodium or potassium sarcosinate with cyanamide at a temperature from 20 to 150&deg; C. and a pH from 7.0 to 14.0 comprises carrying out the pH adjustment with carbonic acid.

Process for the preparation of creatine or creatine monohydrate

Process for producing solid creatine dosage forms and dosage forms obtainable thereby

A process for preparing guanidine derivatives, in particular creatine, is described and entails continuously combining a cyanamide derivative and a primary or secondary amine in the presence of crystals of the guanidine derivative.

Process for preparing guanidine derivatives

A process for purifying creatine is described in which the creatine to be purified in the form free of water of crystallization is introduced into a saturated aqueous solution of creatine monohydrate, in which the creatine free of water of crystallization is dissolved with hydration, crystals of creatine monohydrate precipitate from the aqueous solution and these are separated off from the aqueous solution.

Process for purifying creatine

A process for the preparation of an O-alkylisourea of the formula I,

Preparation on an O-alkylisourea

Substance mixtures containing stabilizers and compounds containing vinyl groups

A process for preparing guanidine derivatives, in particular creatine, is described and entails an O-alkylisourea salt and a primary or secondary amine being reacted in the presence of crystals of a guanidine derivative.

Liquid or solid mixtures of low-salt sulfo-containing 1:2 metal complex dyes and poly-N-vinylpyrrolidone or copolymers of N-vinylpyrrolidone and vinyl acetate are especially useful for dyeing paper and wood and also for dyeing and finishing leather and fur.

Mixtures of sulfo-containing 1:2 metal complexes with vinyl polymers

Hydroxyphenylureas

Polyketomethine dyes

Oxamides useful as dye intermediates have the formula ##STR1## where R.sup.1 and R.sup.2 are independently of each other hydrogen, C.sub.1 -C.sub.4 -alkyl or phenyl,

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Mannheim, Germany

Knut Kessel