二亚磷酸二(对叔丁基苯基)季戊四醇酯的合成

Synthesis of Bis(p-tert-butylphenol) Pentaerythritol Diphosphite

以亚磷酸三乙酯、季戊四醇、对叔丁基苯酚为原料，无水碳酸钾为催化剂，采用酯交换法合成了二亚磷酸二（对叔丁基苯基）季戊四醇酯。实验探讨了反应温度、反应时间、催化剂、催化剂用量、物料配比等因素的影响，确定了最佳工艺条件：第一步的反应温度是120～130℃，反应时间为2h，第二步的反应温度为160～170℃，反应时间为3h，无水碳酸钾为催化剂，物料配比n（季戊四醇）：n（亚磷酸三乙酯）：n（对叔丁基苯酚）为1：2．05：2，催化剂的用量为0．5g，产品的收率在97％以上。通过元素分析、红外分析对产品进行了表征。

Bis （p-tert-butylphenol） pentaerythritol diphosphite was synthesized using triethylphosphite, p-tert-butylphenol and pentaerythrite as raw material and potassium carbonate anhydrous as catalyst in transesterification. The effect of catalyst, temperature, reaction time and molar ratio of the raw material on the reaction was studied. The experimental result shows that the optimum conditions were as follows： reaction temperature I is ranged from 120-130 ℃, reaction temperature Ⅱ is ranged from 160-170 ℃, reaction time I was 2 h, reaction time Ⅱ was 3 h, the catalyst was 0.5 g, and n（pentaetythritol） ： n（triethyl phosphite） ： n（p-tert-butylphenol） was 1 ： 2.05： 2. The product yield can be up to 97%. Elemental analysis and IR characterized the structure of the product.