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wypward(½ð±Ò+1):лл²ÎÓë 2010-10-20 10:38:26
HNBR triethanolamine aqueous solution by concentration on the removal of rhodium catalyst (RhCl (PPh3) 3 in the three coordinate rhodium, a price of 16 outer electrons have two E-stable structure up to 18 e, HNBR with the molecular structure of PAN, as the N-CN atoms can provide the lone pair electrons coincides with the formation of coordination compounds rhodium catalyst, (RhCl (PPh3) 3 in the Rh and HNBR molecular chain-CN coordination to a certain extent role not easily removed. triethanolamine N in the role of oxygen and rhodium coordination empty orbital is stronger than in the HNBR-CN, can win over rhodium from HNBR, triethanolamine and rhodium coordination network formed polar compounds, polar determine that this complex in water than in a better solubility in xylene, so easily soluble in water, which can be (RhCl (PPh3) 3 glue from HNBR the removal of the aqueous phase. Removal of the role of chemical reaction: triethanolamine as a complexing agent at the same time, extraction solvent, its concentration on the removal of rhodium catalyst is significant.
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2Â¥2010-10-18 08:58:54
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3Â¥2010-10-18 09:18:58
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