Organic Process Research and Development p. 2591 - 2603 (2020)
Update date:2022-08-15
Topics:
Landart, Mélissa
Lemaire, Marc
Métay, Estelle
The direct synthesis of dipentaerythritol (DPE) from pentaerythritol (PE) was studied under acidic conditions. After optimization of the reaction parameters in a batch reactor, DPE was obtained with 50% selectivity when 50% PE was converted. This process, using PE in suspension in sulfolane (PE/sulfolane ratio = 2333 g/L) at 175 °C for 60 min, required a low amount of sulfuric acid (0.5 mol %). The optimized conditions were transposed to a 140 grams scale process. Finally, DPE was isolated with 16% yield (72% gas chromatography, GC purity) for 28% conversion of PE that corresponds to 57% DPE selectivity.
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