Patent ID: 6441221
Filing Date: 2002-08-27
Classification: C07C

Abstract:
A process for preparing and packaging at least one long-chain alkyl acrylate of formula (I): in which n is between 18 and 60,comprising preparing the at least one long-chain alkyl acrylate of formula (I) in a reactor by transesterification between a light ester, which is liquid at room temperature, of formula (II): in which R1 represents C1-C4 alkyl and a heavy alcohol, which is solid at room temperature, of formula (III): CH3(CH2)nOHâ€ƒâ€ƒ(III) in which n is from 18 to 60, in the presence of at least one transesterification catalyst and at least one polymerization inhibitor, while bubbling with air or depleted air, the light alcohol R1OH formed distilling off in the form of an azeotrope of light ester (II)/R1OH, and the excess light ester (II) being removed by distillation at the end of the reaction, wherein the solvent (SL) is added to the initial load and/or after removal of the light ester (II), said solvent (SL) having a boiling point greater than that of the light ester (II) when it is introduced in total or in part with the initial load, forming a liquid homogeneous mixture of said at least one acrylate (I) and said solvent (SL), wherein the solvent is present in said mixture in a sufficient amount to provide said mixture with a melting point less than that of said acrylate (I), and packaging by emptying out said mixture from the reactor by gravity into a storage drum.