2004•Chemical ReagentsRequires access
Synthesis of di(2-ethylhexyl)phthalate by transesterification
HU Ying-xi
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Abstract
Di(2-ethylhexyl)phthalate was prepared without solvent by transesterifying di-methyl-o-phthalate with 2-ethyl hexanol in the presence of organic-tin as a catalyst.The influences of temperature,time,catalyst and the molar ratio of raw materials on the yield of the product were studied.The experimental result showed that the optimum conditions were as follows:reaction temperature ranged from 170～180℃,the catalyst was 1.0g,reaction time was 4.0h,the molar ratio between di-methyl-o-phthalate and 2-ethyl hexanol was 1∶2.10.The yield of the product could be up to 96.5%under the optimum conditions.Refractive index,IR and (()~1HNMR) characterized the structure of the product.