Olefin polymerization catalyst carrier, solid catalyst component and use thereof

Abstract

Provided is an olefin polymerization catalyst carrier with a general structure formula of Mg(OR I ) n (OR II ) 2-n , wherein: 0≦n≦2, and R I and R II can be the same or different and are each independently selected from a C 1 -C 20 hydrocarbon group. In the X-ray diffraction pattern of the catalyst carrier, there are a set of diffraction peaks in the range of a 2θ diffraction angle of 5°-15°, and the set of diffraction peaks contain 1-4 main diffraction peaks. Also disclosed is an olefin polymerization solid catalyst component which is prepared from the carrier Mg(OR I ) n (OR II ) 2-n , a titanium compound, and at least one electron donor compound. In addition, also disclosed is an olefin polymerization catalyst containing the solid catalyst component, at least one organic aluminum compound, and optionally, an external electron donor compound.

1 . An olefin polymerization catalyst carrier, having a general formula of Mg(OR I ) n (OR II ) 2-n , wherein 0≦n≦2, and R I  and R II  are same or different, and are each independently selected from a C 1 -C 20  hydrocarbon group; and wherein in the X-ray diffraction pattern of the catalyst carrier, there are a set of diffraction peaks in the range of a 2θ diffraction angle of 5°-15°, and the set of diffraction peaks contain 1-4 main diffraction peaks. 
     
     
         2 . The catalyst carrier according to  claim 1 , wherein in the catalyst carrier Mg(OR I ) n (OR II ) 2-n , R I  and R II  are the same or different, and are each independently selected from a C 1 -C 8  hydrocarbon group. 
     
     
         3 . The catalyst carrier according to  claim 1 , wherein in the X-ray diffraction pattern of the catalyst carrier Mg(OR I ) n (OR II ) 2-n , there are a set of diffraction peaks in the range of a 2θ diffraction angle of 7°-13°, and the set of diffraction peaks contain 1-4 main diffraction peaks. 
     
     
         4 . The catalyst carrier according to  claim 1 , wherein in the X-ray diffraction pattern of the catalyst carrier Mg(OR I ) n (OR II ) 2-n , there are a first set of diffraction peaks containing 1-4 main diffraction peaks in the range of a 2θ diffraction angle of 5°-15°, and there are a second set of diffraction peaks containing 1-3 main diffraction peaks in the range of a 2θ diffraction angle of 20°-30°. 
     
     
         5 . The catalyst carrier according to  claim 4 , wherein in the X-ray diffraction pattern of the catalyst carrier Mg(OR I ) n (OR II ) 2-n , the highest diffraction peak is within the range of the first set of peaks. 
     
     
         6 .- 11 . (canceled) 
     
     
         12 . An olefin polymerization solid catalyst component comprising the catalyst carrier according to  claim 1 , further comprising a titanium compound with a general formula TiX n (OR) 4-n , wherein R is a C 1 -C 20  hydrocarbon group, X is a halogen, n=0-4, and at least one electron donor compound. 
     
     
         13 . The solid catalyst component according to  claim 12 , wherein the titanium compound is selected from the group consisting of titanium tetrachloride, titanium tetrabromide, titanium tetraiodide and alkoxy titanium halide, and is preferably titanium tetrachloride. 
     
     
         14 . The solid catalyst component according to  claim 12 , wherein the electron donor compound is selected from Lewis base containing one or more electronegative groups in which the electron donor atom is selected from the group consisting of N, O, S, P, As or Sn. 
     
     
         15 .- 17 . (canceled) 
     
     
         18 . An olefin polymerization catalyst comprising the following components or the reactants of the following components:
 a) a solid catalyst component according to  claim 12 ;   b) at least one organoaluminum compound with a general formula AlR n X (3-n) , wherein R is a hydrogen, a hydrocarbon group having 1-20 carbon atoms; X is a halogen, n is an integer of 0≦n≦3; and, optionally,   c) at least one external electron donor compound.   
     
     
         19 . The catalyst according to  claim 18 , wherein the at least one organoaluminum compound is selected from the group consisting of trialkylaluminum compound, trialkylaluminum and alkyl aluminum halide, alkyl aluminum cyanide, and alkyl aluminum sesquichloride. 
     
     
         20 . The catalyst according to  claim 18 , wherein the external electron donor is selected from siloxane compounds with a general formula R n Si(OR 1 ) 4-n , wherein R and R 1  are C 1 -C 18  hydrocarbon groups, and optionally have heteroatoms; n is an integer of 0≦n≦3. 
     
     
         21 .- 22 . (canceled)