高位阻双酚2,2'-亚甲基双(4,6-二叔丁基苯酚)的合成

以2，4-二叔丁基苯酚和甲醛为原料，乳液缩合法合成2，2′-亚甲基双(4，6-二叔丁基苯酚)(MB46)。分别考察了催化剂和表面活性剂种类及用量、水的用量及反应时间等对反应的影响，实验结果表明，表面活性剂的种类对反应有很大的影响，采用阴离子表面活性剂十二烷基硫酸钠效果较好。在2，4-二叔丁基苯酚10．3g、甲醛2．5mL的合成条件下，最佳工艺参数为：十二烷基硫酸钠0．1g，水的用量为40mL，反应时间为7h，硫酸用量为0．6mL。

Synthesis of High Steric Hindrance Bisphenol 2,2'- methylene bis (4,6-di-t-butylphenol)

The method of emulsion condensation is used to synthesize 2,2'-methylene bis(4,6-di-t-butylphenol)(short for MB46). The effect of all factors on the reaction including the kinds and the amount of acid catalysts and surface-active agents, the reaction time and the use level of water are discussed in the article. The results indicate that the surface-active agents are the important factor influencing the reaction in the synthesizing MB46. Lauryl sodium sulfate (C12H25OSO3Na) is selected by comparison. The optimal use level of water is selected as 40ml by means of the experiment; the optimal reaction time is 7 h; the optimal use level of catalyst of sulfur acid is 0.6mL under the reaction condition of using 2,4-bitert-butyl phenol 10.3g and formaldehyde 2.5mL.