polymer of styrene-divinylbenzene in bead form was made by suspension polymerization. After chloromethylation and amination, five kinds of polynZeric ammes were thus obtained. These polymers were reacted with palladiu...polymer of styrene-divinylbenzene in bead form was made by suspension polymerization. After chloromethylation and amination, five kinds of polynZeric ammes were thus obtained. These polymers were reacted with palladium chloride, and were then reduced. The polymer-supported catalysts synthesized above were used to catalyze the selective hofrogenation Of mesityl oxide under reaction conditions Of 80t and 10kg/cm￣2, using methanol as a solvent.The catalytic activity and MIBK (methyl isobutyl ketone) formation selectivity of the catalysts were examined.展开更多
A series of porous resins (PYR) with different content of pyridyl group were prepared,and their physical structure and adsorption properties on the stevia glycosides werestudied in detail. Afler the selective adsorpti...A series of porous resins (PYR) with different content of pyridyl group were prepared,and their physical structure and adsorption properties on the stevia glycosides werestudied in detail. Afler the selective adsorption of PYR resins, the rebaudioside A couldbe separated hem the other components of the stevia glycosides, and a new methodforobtaining pure rebaudioside A is reported.展开更多
文摘polymer of styrene-divinylbenzene in bead form was made by suspension polymerization. After chloromethylation and amination, five kinds of polynZeric ammes were thus obtained. These polymers were reacted with palladium chloride, and were then reduced. The polymer-supported catalysts synthesized above were used to catalyze the selective hofrogenation Of mesityl oxide under reaction conditions Of 80t and 10kg/cm￣2, using methanol as a solvent.The catalytic activity and MIBK (methyl isobutyl ketone) formation selectivity of the catalysts were examined.
文摘A series of porous resins (PYR) with different content of pyridyl group were prepared,and their physical structure and adsorption properties on the stevia glycosides werestudied in detail. Afler the selective adsorption of PYR resins, the rebaudioside A couldbe separated hem the other components of the stevia glycosides, and a new methodforobtaining pure rebaudioside A is reported.
