Novel process for producing semicarbazide

Details Novel process for producing semicarbazide Novel process for producing semicarbazide

C - Chemistry, Metallurgy

07

C

C07C 281/06 (2006.01)

Patent

CA 2075805

A process for producing semicarbazide which comprises reacting a compound of formula (I) with ammonia in the absence or presence of a catalyst comprising a chloride, hydroxide, sulfate, carbonate, acetate, salicylate, amine complex or ethylenediamine complex of zinc or cadmium, or a mixture thereof. This process is advantageous in that it is free from the problem of the use of a large amount of sodium hydroxide and the generation of by-product sodium carbonate.

L'invention se rapporte à un procédé de production de semicarbazide, qui consiste à faire réagir un composé représenté par la formule (I) avec de l'ammoniaque en l'absence ou en présence d'un catalyseur contenant un chlorure, un hydroxyde, un sulfate, un carbonate, un acétate, un salicylate, un complexe ammoniacate ou un complexe éthylènediamine de zinc ou de cadmium ou un mélange de ceux-ci. Ce procédé a l'avantage d'éliminer le problème de l'utilisation d'une grande quantité d'hydroxyde de sodium et de la formation de carbonate de sodium en sous-produit.

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