Patent EA-002131-B1 (EA)
Title: Mixed titanium-vanadium catalyst for olefin polimerization in solution and process for preparing same
Inventor: JABER ISAM
IPC: C08F210/16
Filed: 1999-06-28
Abstract: 1. A catalyst consisting essentially of:  (i) a mixture of an alkyl aluminum compound of the (R<1>)3 Al<1> and (R<2>)2Mg wherein R<1> is a C1-10 alkyl radical and R<2> is a C1-10 alkyl radical in a molar ratio of Mg to Al<1> from 4.0 :1 to 8.0:1; (ii) a halide of the formula R3X wherein R<3> is a C1-8 alkyl radical and x is a halide selected from the group consisting of chlorine and bromine; (iii) titanium tetrachloride; (iv) VOCl3 to provide a molar ratio of Ti:V from 95:5 to 70:30; and (v) an alkyl aluminum alkoxide compound of the formula (R<4>2Al<2>OR<5> wherein R<4> and R<5> are independently selected from the group consisting of C1-10 alkyl radicals to provide: a molar ratio of Mg:(Ti+V) from 4:1 to 8.0:1; a molar ratio of Al<1> to (Ti+V) from 0.9:1 to 1.5:1; a molar ratio of halide to Mg from 1.9:1 to 2.6:1; and a molar ratio of Al<2> to (Ti+V) from 2.0:1 to 4.0:1. 2. The catalyst according to claim 1, wherein in component (i) the molar ratio of Mg:Al is from 6.0:1 to 8.0:1. 3. The catalyst according to claim 2, wherein the molar ratio of Mg:(Ti+V) is from 6.0:1 to 8.0:1. 4. The catalyst according to claim 3, wherein the molar ratio of Al<1> to (Ti+V) is from 1:1 to 1.3:1. 5. The catalyst according to claim 4, wherein the molar ratio of halide to Mg is from 1.9:1 to 2.3:1. 6. The catalyst according to claim 5, wherein the molar ratio of Al<2> to (Ti+V) is from 3.0:1 to 4.0:1. 7. The catalyst according to any one of the preceding claims, wherein R<1>, R<3>, R<4> and R<5> are independently selected from the group consisting of C1-14 alkyl radicals. 8. The catalyst according to claim 7, wherein R<1> is an ethyl radical. 9. The catalyst according to claim 8, wherein R<2> is a C2-6 alkyl radical. 10. The catalyst according to claim 9, wherein R<3> is a tertiary butyl radical. 11. The catalyst according to claim 10, wherein R<4> and R<5> are ethyl radicals. 12. A process for preparing a catalyst according to any one of the preceding claims, comprising mixing components (i) through (iv) at a temperature from 20 degree C to 100 degree C and tempered for a time from 0.5 to 30 minutes and adding component (v). 13. The process according to claim 12, wherein the time is from 5 to 15 minutes. 14. The process according to claim 13, wherein the temperature is from 80 degree C to 100 degree C. 15. The process for preparing a catalyst according to claim 12, comprising mixing components (i) through (iv) in-line for a time from 0.5 to 3 minutes at a temperature from 20 degree C to 50 degree C feeding the resulting mixture to the polymerization reactor and adding component (v) directly to the polymerization reactor. 16. The process for preparing a catalyst according to claim 12, comprising mixing components (i) through (iv) in-line for a time from 0.5 to 3 minutes at a temperature from 20 degree C to 50 degree C feeding the resulting mixture to a CSTR at a temperature from 20 degree C to 100 degree C and adding component (v) to the CSTR and holding the resulting mixture in the CSTR for a time from 0.5 to 30 minutes and feeding the resulting mixture to the polymerization reactor. 17. The process for preparing a catalyst according to claim 12, comprising mixing components (i) through (iv) in-line for a time from 0.5 to 3 minutes at a temperature from 20 degree C to 50 degree C adding Component (v) to the catalyst line feeding a CSTR and holding the resulting mixture in the CSTR at a temperature from 20 degree C to 100 degree C and for a time from 0.5 to 30 minutes and feeding the resulting mixture to the polymerization reactor. 18. The process for preparing a catalyst according to claim 12, comprising mixing components (i) through (iv) in-line for a time from 0.5 to 3 minutes at a temperature from 20 degree C to 50 degree C feeding the resulting mixture to a CSTR at a temperature from 20 degree C to 100 degree C and holding the resulting mixture in the CSTR for a time from 0.5 to 30 minutes and adding component (v) directly to either the polymerization reactor or the line from the CSTR to the polymerization reactor. 19. The process for preparing a catalyst according to claim 6, comprising mixing components (i) through (iv) in-line for a time from 0.5 to 3 minutes at a temperature from 20 degree C to 100 degree C and adding Component (v). 20. The process according to claim 19, wherein the time is from 5 to 15 minutes. 21. The process according to claim 20, wherein the temperature is from 80 degree C to 100 degree C.