论文部分内容阅读
2,6-萘二甲酸(2,6-NDCA)及其衍生物是制备各种聚酯和聚氨酯材料的重要单体,在钛材间歇式搅拌釜中,以2,6-二甲基萘为原料,醋酸钴、醋酸锰、醋酸钾和溴化物等为催化剂,研究了2,6-二甲基萘空气液相氧化制备2,6-萘二甲酸的过程。确定n(Co+Mn)/n(HAc),n(Co)/n(Co+Mn),n(Br)/n(Co+Mn),n(Co+Mn)/n(2,6-DMN),n(K+)/n(Co+Mn)和助催化剂对收率和纯度的影响,从而得到比较适宜的催化条件。在此催化条件下,还考察了引发温度、反应压力、反应温度、溶剂比以及醋酸的浓度对收率和纯度的影响,确定了最佳合成2,6-萘二甲酸反应条件。
2,6-Naphthalene dicarboxylic acid (2,6-NDCA) and its derivatives are important monomers for preparing various polyester and polyurethane materials. In a titanium batch batch reactor, 2,6-dimethylnaphthalene As raw materials, cobalt acetate, manganese acetate, potassium acetate and bromide as catalyst, the 2,6-dimethyl naphthalene air liquid phase oxidation of 2,6-naphthalene dicarboxylic acid process. N (Co + Mn) / n (HAc), n (Co) / n (Co + Mn), n (Br) / n DMN), n (K +) / n (Co + Mn) and cocatalyst on the yield and purity, so as to obtain more suitable catalytic conditions. Under the catalytic conditions, the effects of temperature, reaction pressure, reaction temperature, solvent ratio and the concentration of acetic acid on the yield and purity of the 2,6-naphthalene dicarboxylic acid were also investigated.