88results about How to "High oligomerization reactivity" patented technology

The invention provides an ethylene oligomerization catalyst, which comprises Zr(OBu)Cl3, SiClx-1R4-x(OBu), BuOH and SiClxR4-x in a mole ratio of 1:(0.5-5.0):(0-5.0):(0-20), wherein Bu is butyl; R is alkyl of C1 to C4 or aryl of C6 to C8; and x is an integer from 1 to 4. The catalyst has high reaction activity in an ethylene oligomerization reaction, a plurality of long chain hydrocarbons of C12 to C20 exist in an oligomerization product and the yield of alpha-olefin is high.

The invention discloses a method for oligomerization of ethylene. The ethylene is subjected to oligomerization in a reaction system containing a primary catalyst, an aluminum-containing cocatalyst, water and an organic solvent, wherein the primary catalyst is a complex of 2-acetyl-1,10-phenanthroline (2,6-diisopropylanil)FeCl2, the formula (I) of the complex is as shown in the specification, the organic solvent is the alpha-olefin of Cn (n is more than 4 and less than or equal to 10), and in the chemical formula, R1-R5 are independently selected from hydrogen, C1-C6 alkyl, halogen, C1-C6 alkoxy and nitryl. The method disclosed by the invention has the advantages that the technical prejudice can be overcome, the process for oligomerization of ethylene can be optimized, the ethylene has high oligomerization activity, the oligomerization of ethylene can be initiated rapidly and operated stably and is hypo-toxic and environment-friendly, the catalytic effect and the production cost can be comprehensively considered and well balanced and the oligomerization cost of ethylene can be reduced greatly. In addition, the method disclosed by the invention is highly practical and has a broad industrial prospect.

The invention discloses a load-type olefin oligomerization catalyst, which comprises a complex loaded on a medium-pore aluminum silica material and having an expression shown as formula (I). The catalyst comprises 0.1 to 5.0 mass percent of nickel; in the formula (I), R is selected from hydrogen, C1 to C12 alkyl, C1 to C6 alkoxy or nitryl, X is halogen or acetate moiety, and n is 1 or 2; themedium-pore aluminum silica material has a pseudo-boehmite phase structure, and comprises the anhydrous chemical composition based on the mass of oxide of (0-0.3)Na2O.(40-90)Al2O3.(10-60)SiO2, the specific surface area of the medium-pore aluminum silica material is between 200 and 400m<2> / g, the pore volume is between 0.5 and 2.0 ml / g, the average aperture is between 8 and 20nm and the most probable aperture is between 5 and 15nm. The catalyst is used for olefin oligomerization and has higher reaction activity; and oligomerization products have wider distribution range without generating polymers.