Method of preparing granular n-alkyl-ammonium acetonitrile...

Details Method of preparing granular n-alkyl-ammonium acetonitrile... Method of preparing granular n-alkyl-ammonium acetonitrile...

C - Chemistry, Metallurgy

07

C

C07C 253/30 (2006.01) C07C 253/32 (2006.01) C07C 255/25 (2006.01) C07D 295/14 (2006.01) C07D 295/15 (2006.01)

Patent

CA 2368481

The invention relates to an improved method for the preparation of granular N- alkyl ammonium acetonitrile salts of formula (I) R2R3N+R1-CR4R5-CN Y-in which R1 to R5 are hydrogen or organic rests and Y- is a sulfate or hydrogen sulfate anion; from an aqueous solution of the compound of formula (II) R2R3N+R1-CR4R5- CN R6O-SO2-O- in which R6 is C1 to C4 alkyl. According to the invention the aqueous solution is evaporated at a temperature of between 80 and 250 ~C and a pressure of between 10 mbar and 2 bar so as to obtain a melt and said melt is then left to solidify. During or after evaporation usual carrier materials and/or auxiliaries can be added. Lastly the resulting solidified compound (I) is given the desired granular form.

Procédé amélioré de fabrication de sels de N-alkylammoniumacétonitrile en grains, de formule (I) R?2¿R?3¿N?+¿R?1¿-CR?4¿R?5¿-CN Y?-¿ dans laquelle R?1¿ à R?5¿ représentent hydrogène ou des restes organiques et Y?-¿ représente un anion de sulfate ou de sulfate d'hydrogène, à partir d'une solution aqueuse de formule R?2¿R?3¿N?+¿R?1¿-CR?4¿R?5¿-CN R?6¿O-SO¿2?-O?-¿ dans laquelle R?6¿ représente alkyle C¿1? à C¿4?. Ledit procédé consiste à réduire par ébullition cette solution aqueuse à une température de 80 ·C à 250 ·C et à une pression de 10 mbars à 2 bars pour obtenir une masse fondue, et à laisser ladite masse fondue se solidifier, des matières de support et/ou des adjuvants classiques pouvant être ajoutés pendant ou après la réduction par ébullition, puis à donner au composé solidifié de formule (I) ainsi obtenu la forme granulée souhaitée.

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