Abstract: A method for handling and stabilizing a (2-alkyl)-acryloyl isocyanate represented by the formula (1) ##STR1## is disclosed, which comprises the steps of: reacting an azomethine compound represented by formula (2) ##STR2## with the (2-alkyl)-acryloyl isocyanate of formula (1) to obtain the reaction product of formula (3) ##STR3## and dissolving said reaction product into a solvent to regenerate the (2-alkyl)-acryloyl isocyanate of formula (1); the identity of said solvent and R-groups being defined herein.

Abstract: The invention concerns a process for the preparation of acyl isocyanates which consists of reacting oxalyl chloride with a salt selected from the group consisting of hydrohalides and sulphates of carboxamides and/or carbamates, unsubstituted on nitrogen, then heating the reaction mixture at a temperature between 30.degree. and 150.degree. C. The process is suitable for preparation of acyl isocyanates with excellent yields in easy to control operational conditions.

Abstract: The invention relates to a process for the preparation of acyl isocyanates of formula ##STR1## in which R is an alkyl radical, a substituted or unsubstituted naphthyl or phenyl radical or a substituted or unsubstituted aromatic heterocyclic radical, which consists in reacting an acyl halide of formula ##STR2## in which R has the above meaning and X denotes a fluorine, chlorine or bromine atom, with a sodium or potassium cyanate in the presence of a compound chosen from tin(IV), zinc or nickel(II) halides.The acyl isocyanates thus prepared are very useful for forming ureas or carbamates.

Abstract: Production of an alkenoyl isocyanate of the formula: ##STR1## wherein R is a hydrogen atom or a lower alkyl group by reacting an acrylamide of the formula: ##STR2## wherein R is as defined above with an oxalyl halide of the formula(COX).sub.2wherein X is a halogen atom to give a reaction mixture comprising a haloalkanoyl isocyanate of the formula: ##STR3## wherein R and X are each as defined above with or without the alkenoyl isocyanate, recovering the haloalkanoyl isocyanate and, when present, the alkenoyl isocyanate separately from the reaction mixture and reacting the recovered haloalkanoyl isocyanate with a hydrogen halide-eliminating agent to give the alkenoyl isocyanate.