Preparation of substantially dust-free tetrayhdro-3,5-...

Details Preparation of substantially dust-free tetrayhdro-3,5-... Preparation of substantially dust-free tetrayhdro-3,5-...

C - Chemistry, Metallurgy

07

D

C07D 285/34 (2006.01) A01N 43/88 (2006.01)

Patent

CA 2122257

Described is a method of producing tetrahydro-3,5-dimethyl-1,3,5-thiadiazin-2- thion powder (I) substantially free of dust fines by reacting methylamine (II) with carbon disulphide (III) and formaldehyde (IV) or by reacting the methylammonium salt of N-methyldithiocarbamic acid (V) with formaldehyde (IV), characterized in that the reaction is carried out in the presence of at least one diaminoalkylene of the formula (VI): R1-NH-A-NH-R2, in which R2 and R2, independently of each other, are hy- drogen or an alkyl group and A is an optionally substituted 1,2-ethylene, 1,3- propylene or 1,4-butylene bridge.

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