C - Chemistry – Metallurgy – 07 – D
Patent
C - Chemistry, Metallurgy
07
D
C07D 285/34 (2006.01) A01N 43/88 (2006.01)
Patent
CA 2418972
A method for the production of a particle-containing preparation of tetrahydro- 3,5-dimethyl-1,3,5-thiadiazin-2-thione, by combination of a first aqueous solution containing methylammonium-N-methyldithiocarbamate with a second solution containing formaldehyde and separation and drying of the solid formed is disclosed. The invention is characterised in that the first and second solutions are combined such that over the duration of the reaction the ratio of the concentration of dithiocarbamate functions and formaldehyde in the reaction mixture remains essentially constant over time.
L'invention concerne un procédé de production d'une préparation sous forme de particules de tétrahydro-3,5-diméthyl-1,3,5-thiadiazin-2-thion, par combinaison d'une première solution aqueuse contenant du méthylammonium-N-méthyldithiocarbamate, séparation et séchage de la substance solide formée. Ce procédé se caractérise en ce que l'on combine les première et seconde solutions aqueuses, de manière que le taux de concentration de fonctions dithiocarbamates et de formaldéhyde dans le mélange réactionnel reste sensiblement contant dans le temps tout au long de la réaction.
Burkart Kirsten
Drogemuller Michael
Franke Dirk
Isak Heinz
Munzinger Manfred
Basf Aktiengesellschaft
Robic
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