エピクロルヒドリン誘導体に関する研究 (第8報) : ポリグリセリンの直接合成法

概要

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The direct synthetic method of polyglycerine (PG) by means of hydrolysis of epichlorohydrin (ECH) with caustic soda solution was investigated. The concentration of caustic soda solution considerably affected the yield and the molecular weight of PG. It was observed that the higher the concentration, the lower the yield and the higher the molecular weight. The glycerine content of PG was also affected by the concentration of the caustic soda solution, and the glycerine content increased with the decrease in the concentration.<BR>It was found, moreover, that water-soluble solid PG or insoluble and infusible PG, which was suggested to be cross-linked PG, was obtained when the hydrolysis of ECH was carried out with 30% caustic soda solution.<BR>When ECH and caustic soda solution were mixed in an autoclave and the hydrolysis was carried out under pressure, the reaction took place violently and no solid polymer was obtained. The product obtained was dark brown and unsaturated polymer, which was probably caused by the decomposition of some intermediates.<BR>Then, the method of desalting from PG was investigated. The electrodialysis was found the most effective method of desalting from PG. PG containing only about 1% salt was obtained from the PG solution containing about 15% salt. The loss of the organic substances, such as PG and glycerine, was only 7% in the process of the electrodialysis.
社団法人日本油化学会の論文