State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing, PR China.
Bioresour Technol. 2011 Feb;102(3):2665-71. doi: 10.1016/j.biortech.2010.10.131. Epub 2010 Nov 3.
Poly (sodium acrylate) supporting NaOH (NaOH/NaPAA) was prepared by in situ polymerization of aqueous solution of acrylic acid with an over-neutralization by adding excess of NaOH. NaOH/NaPAA presented a promising selectivity for water absorbency and good water retention with negligible swelling capacity in the organic solvents of methanol, glycerol, rubber seed oil methyl esters, and rubber seed oil. NaOH/NaPAA catalysts showed a basic strength of 15.0<H_<18.4 and their basicity increased with the increase of the NaOH loading amount. NaOH/NaPAA catalysts exhibited almost the same catalytic activity in the transesterification of rubber seed oil with methanol under the optimized reaction conditions compared to conventional homogeneous NaOH catalyst. Furthermore, the functional absorbent/catalyst system presented a good water resistance in the transesterification which retained high catalytic activity when a water concentration in the reaction system was less than 2 wt.%.
由丙烯酸的水溶液通过加入过量的氢氧化钠进行过碱化原位聚合制备了聚丙烯酸钠（NaOH/NaPAA）。NaOH/NaPAA 对水的吸收具有良好的选择性和保持能力，在甲醇、甘油、橡胶籽油甲酯和橡胶籽油等有机溶剂中几乎没有溶胀能力。NaOH/NaPAA 催化剂的碱强度为 15.0<H_<18.4，其碱性随 NaOH 负载量的增加而增加。在优化的反应条件下，NaOH/NaPAA 催化剂在橡胶籽油与甲醇的酯交换反应中的催化活性与传统均相 NaOH 催化剂几乎相同。此外，该功能吸收剂/催化剂体系在酯交换反应中具有良好的耐水性，当反应体系中的水浓度小于 2wt.%时，仍保持较高的催化活性。
