Abstract

The paper describes linear optimization of process conditions for condensation of tert-butanol with aqueous formaldehyde in the presence of synthetic zeolites (CA-Y, NaA-Y, CaA-Y, NaX, and CaX) and phosphoric acid as catalysts. The process was carried out in an autoclave at 100–150°C, 0.5–0.6 MPa, and a stirring speed of 60 rpm. The selectivity towards 4,4-dimethyl-1,3-dioxane (DMD) as a target product in the Prins reaction involving tert-butanol was investigated as a function of optimization parameters such as reaction time, temperature, reactant ratio, phosphoric acid content, and synthetic zeolite type. For each “parameter vs. DMD selectivity” function, an extremum point corresponding to the optimal parameter value was found. In the presence of NaA-Y, the DMD selectivity reached 98%.

中文翻译：

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沸石 A 和 X 上叔丁醇与甲醛缩合 4,4-二甲基-1,3-二恶烷合成条件优化

摘要

该论文描述了在合成沸石（CA-Y、NaA-Y、CaA-Y、NaX 和 CaX）和磷酸作为催化剂存在的情况下，叔丁醇与甲醛水溶液缩合的工艺条件的线性优化。该过程在 100–150°C、0.5–0.6 MPa 和 60 rpm 的搅拌速度下在高压釜中进行。对 4,4-二甲基-1,3-二恶烷 (DMD) 作为涉及叔-的 Prins 反应中的目标产物的选择性研究了丁醇作为优化参数（如反应时间、温度、反应物比例、磷酸含量和合成沸石类型）的函数。对于每个“参数与 DMD 选择性”函数，找到对应于最佳参数值的极值点。在NaA-Y存在下，DMD选择性达到98%。