Citation:
	            
		            Zhou  Keyan, Wu  Leng. STUDY OF THE PROPYLENE DIMERIZATION CATALYZED BY β-DIKETONATE COMPLEXES OF LIGHT RARE-EARTH METALS[J]. Chinese Journal of Applied Chemistry,
							;1987, 4(2): 17-21.
						
				
					 
				
	        
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	                	In this paper the study of propylene dimerization catalyzed by β-diketonatə complexes of light rare-earth metals is presented catalyst Pr (acac)3·H2O/Et3Al2 Cl3/PPh3 showed higher activity of 1200-1300 molC3-/molPr.h and conversion rate of 50-60% in dimerization under the reaction conditions Pr(acac)3·H2O, 0.05-0.3mmol; Al/Pr ratio, 30-50; P/Pr ratio, 3-6 and temperature 60-80℃. For systems RE(acac)3/Et3Al2Cl3/PPh3 and Pr(β-diketonates)3·H2O/Et3 Al2Cl3/PPh3,the catalyst activity decreased in the following order:for rare earths:Ce~Pr > La > Nd > Sm for ligands:hfacac > acac > DBM. All catalyst systems studied gave a close weight percentage of products:methylpen-tenes of 64-66% and linear hexenes of 24.1-26.4 with dimer selectivity of 77-93.3%.
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