Abstract: The invention relates to methyl methacrylate characterized in that at least one portion of the carbons thereof is biologically sourced and, more specifically, in that it contains between 0.2×10?10 and 1.2×10?10 wt.-% of 14C in relation to total carbon weight according to the ASTM D6866 standard. The preparation method uses acetone cyanohydrin as a raw material, the acetone cyanohydrin being obtained by condensing cyanohydric acid on acetone, and the methyl methacrylate is prepared using a process involving the addition of methanol. According to the invention, at least one from among the acetone, cyanohydric acid and methanol is obtained by a reaction or series of reactions involving the biomass.

Abstract: The invention relates to methyl methacrylate characterized in that at least one portion of the carbons thereof is biologically sourced and, more specifically, in that it contains between 0.2×10?10 and 1.2×10?10 wt.-% of 14C in relation to total carbon weight according to the ASTM D6866 standard. The preparation method comprises the use of acetone cyanohydrin as a raw material, said acetone cyanohydrin being obtained by condensing cyanohydric acid on acetone, and the methyl methacrylate is prepared using a process involving the addition of methanol. According to the invention, at least one from among the acetone, cyanohydric acid and methanol is obtained by means of a reaction or series of reactions involving the biomass.

Abstract: The compounds of formula (I) are provided as deposition inhibitors which prevent the deposition of compounds of polymeric nature or resulting from addition reactions to (meth)acrylic double bonds during operations for the synthesis or purification or regeneration of (meth)acrylic monomers. R1 represents a C3-C30 alkyl radical, an aryl radical or an alkylaryl radical, it being possible for these radicals to be interrupted by or connected to the oxygen of the molecule via a —(OR4)o— chain where the R4 groups each independently represent an ethylene, propylene or butylene chain and o is an integer from 1 to 50; R2 represents R1, a hydrogen atom or a counterion; and R3 represents a hydrogen atom or a counterion.

Abstract: This process for the production of the methyl ethyl ketone cyanohydrin of formula (I) is characterized by the fact that hydrocyanic acid and methyl ethyl ketone are reacted in the presence of diethylamine as a catalyst.

Abstract: Acryloyl chloride is obtained by reaction of acrylic acid with phenylchloroform in the presence of at least one Lewis acid as catalyst and of at least one polymerization inhibitor. According to the invention the catalyst is chosen from zinc oxide and zirconium tetrachloride and the reaction is conducted at a temperature of at least 105.degree. C. In a preferred embodiment acrylic acid is added to the mixture consisting of phenylchloroform, the catalyst and the polymerization inhibitor and heated to a temperature of at least 105.degree. C., the acryloyl chloride formed distilling off as soon as the introduction of acrylic acid begins.Acryloyl chloride is a highly reactive synthesis intermediate.