铑催化剂在NBR加氢领域的应用及回收方法

Rhodium Catalyst for NBR Hydrogenation and Its Recovery Method

摘要:

研究了铑催化剂在丁腈橡胶 (NBR) 均相加氢领域的应用，并开发了一种新的水相萃取回收铑的方法，首次以氯化亚锡为络合剂，2 mol/L盐酸为萃取剂，可以很容易从氢化丁腈橡胶 (HNBR) 胶液中脱除铑催化剂。主要研究反应温度、时间、络合剂用量及萃取剂用量等条件对脱除铑催化剂的影响，在得到铑络合催化剂的最佳脱除条件下，铑催化剂的脱除率可达99 %以上。IR以及1H NMR表征表明这种脱除铑催化剂工艺对HNBR的结构无影响，且不影响耐油的CN基团。

Abstract:

Rhodium metal catalyst was used in the field of NBR homogeneous hydrogenation. A new extraction method of noble metal rhodium catalyst recovery from hydrogenated NBR (HNBR) solution has been researched. Rhodium metal catalyst can be efficiently removed from HNBR solution using SnCl2 as ligand and HCl as extractant. The condition of removing rhodium catalysts from HNBR solution has been studied, including reaction temperature, reaction time, SnCl2 concentration and proportion of aqueous phase to organic phase, and the removal of the rhodium metal catalyst is over 99% under the best conditions. IR and 1H NMR characterization show that HNBR structure and nitrile group have no change after rhodium metal catalyst is removed from HNBR solution.