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以Rh(OAc) 2 为催化剂,以钠、锌和铵的磷酸盐以及钠的磷钼酸盐和磷钨酸盐作为添加剂,在催化甲醇羰基化制乙酸的反应中系统考察了不同添加剂对反应的影响。实验表明,加入添加剂后可显著提高该反应体系的催化活性。其中磷酸盐系列以磷酸铵的助催化效果最好,该催化体系醋酸的时空收率能达到40mol (L·h)以上。磷钼酸钠催化体系在温度较高时醋酸的时空收率高于磷钨酸钠,达到3 5mol (L·h)以上。
Rh (OAc) 2 as a catalyst, with sodium, zinc and ammonium phosphate and sodium phosphomolybdate and phosphotungstate as additives in the catalytic methanol carbonylation of acetic acid reaction system investigated different additives on the reaction Impact. Experiments show that the addition of additives can significantly improve the catalytic activity of the reaction system. Among them, the phosphate series promoted by ammonium phosphate is the best, and the space-time yield of acetic acid in the catalytic system can reach more than 40mol (L · h). Sodium phosphomolybdate catalytic system at higher temperatures, the space-time yield of acetic acid is higher than sodium tungstate, reaching 35mol (L · h) above.