Preparation of bis(alkylbenzylidene)sorbitol
专利汇可以提供Preparation of bis(alkylbenzylidene)sorbitol专利检索，专利查询，专利分析的服务。并且PURPOSE: To obtain the titled compound useful as an additive for polyolefin resins industrially advantageously, by adding an aqueous solution with a specific pH to a reaction solution prepared by condensing sorbitol with an aldehyde in a specific molar ratio through dehydration in the presence of a specified solvent and a catalyst, followed by heating it so that the solvent is eliminated.
CONSTITUTION: 1mol sorbitol is condensed with 1.6W2.2mol, preferably 1.8W 2.0mol alkylbenzaldehyde shown by the formulaI(R is H or lower alkyl except ethyl group; m is 1W3) through dehydration using an organic solvent azeotropic with water in the presence of an acid catalyst under heating, to give a reaction solution, to which an aqueous solution with a slight alkalinity in a pH of 7.1W 9.1 is added. The solution is heated and the organic solvent and water are removed as an azeotropic mixture, to separate the desired compound shown by the formula II as solid powder. The organic solvent can be distilled away almost completely out of the system, and advantageously it is prevented from being blended with an organic solvent to be used for further purification of the desired compound.
COPYRIGHT: (C)1982,JPO&Japio，下面是Preparation of bis(alkylbenzylidene)sorbitol专利的具体信息内容。
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