Abstract:

The research progresses on the main production technologies and the noble metal catalysts for synthesis of methyl methacrylate (MMA) from isobutylene/tert-butyl alcohol in recent years were systematically reviewed. The researches on the synthesis of MMA with supported gold catalysts by oxidative esterification were mainly introduced. In comparison with the precious metal Pd catalysts, the supported gold catalysts emerge to be potential candidates due to their mild reaction conditions, high activities and selectivities. However, the low stabilities of gold catalysts greatly limit their industrial applications. Herein, the catalytic performances of gold catalysts for synthesis of MMA in recent years were compared and analyzed. The strategies on improving the stabilities of gold catalysts were elaborated. The relevance of the gold catalysts’ structure and their performances was displayed. In addition, the reaction mechanisms of these systems were discussed. In the future, preparation of supported gold catalysts with controllable structures and sizes by special means and modulation of the geometric structure and electronic structure of the catalysts by adding additives or other metals will be the research directions of this field.

Key words: catalyst, nano particle, fixed bed, oxidation, esterification

摘要：

综述了近年来合成甲基丙烯酸甲酯（MMA）主要生产工艺技术及贵金属催化剂在以异丁烯/叔丁醇为原料合成MMA反应的研究进展，重点对负载型金催化剂在氧化酯化合成MMA反应的研究工作进行了介绍。相比于贵金属钯催化剂，金催化剂因反应条件温和，活性、选择性高等优点成为钯催化剂的潜在替代者。然而，金催化剂较低的稳定性限制了其工业化应用。本文对比分析了近年来金催化剂合成MMA的研究结果，阐述了其在提升稳定性方面的相关策略，揭示了金催化体系结构与反应性能之间的关联，并对机理进行了讨论。未来采用特殊手段合成结构可控、尺寸可调的负载型金催化剂以及通过添加助剂或其他金属的方式调变催化剂几何结构、电子结构等将是该领域的研究方向。

关键词: 催化剂, 纳米粒子, 固定床, 氧化, 酯化