Synthesis of Rhodium polymer-bound catalysts / Rungravee Thawornpanich = การสังเคราะห์ตัวเร่งปฏิกิริยาโรเดียมชนิดที่ยึดติดกับโพลิเมอร์
xx, 155 leaves : illustrations, charts
Rhodium polymer-bound catalysts were prepared with three different percent crosslinks. The polymeric supports were formed firstly by suspension polymerization of styrene, divinyl benzene (DVB) and vinylbenzyl chloride. 2-bromoethy1benzene and followed by the dehydrobromination. Several attempts were paid on the generation of the polymeric supports in the spherical form. The type and amount of solvents used in suspension polymerization were experimentally considered in order to obtain the polymeric beads with the largest specific surface area and highest total pore volume. It was found that methylisobutyl carbinol amounted 50% weight by weight of the total monomers was the best solvent. The percentage of crosslinking, DVB, was then var i.e. 3%, 10% and 20% which afforded the polymeric beads with three different crosslinks. A liand, anthranilic acid, was subequently attached to each type of polymeric supports. By variation of several swelling solvents, dimethyl formamide was found to be the most appropriate one for anchoring anthrailic acid to the polymeric beads. The treatment of the polymeric supports anchoring anthranilic acid with rhodium trichloride and subsequently with sodium borohydride led to rhodium polymer-bound catalysts. The activities of these rhodium polymer-bound catalysts were monitored by subjection to the hydrogenation of cyclohexene at room temperature.