Olefin polymerization processes are described herein. The processes generally include circulating a slurry including an olefin monomer selected from C2-C12 olefin monomers, a liquid diluent selected from C3-C7 alkanes, catalyst and polyolefin particles under polymerization conditions within a loop r
Olefin polymerization processes are described herein. The processes generally include circulating a slurry including an olefin monomer selected from C2-C12 olefin monomers, a liquid diluent selected from C3-C7 alkanes, catalyst and polyolefin particles under polymerization conditions within a loop reactor. In one or more specific embodiments, in operation, the process has a cavitation number of from 6 to 60 and the polymerization conditions include a polymerization temperature of from 38° C. to 121° C. and a polymerization pressure of from 27 bar to 50 bar. In other embodiments, the process has a Euler Number (Eu) of at least 5.
대표청구항▼
1. An olefin polymerization process comprising: circulating a slurry comprising an olefin monomer selected from C2-C12 olefin monomers, a liquid diluent selected from C3-C7 alkanes, catalyst and polyolefin particles under polymerization conditions within a loop reactor, wherein, in operation, the pr
1. An olefin polymerization process comprising: circulating a slurry comprising an olefin monomer selected from C2-C12 olefin monomers, a liquid diluent selected from C3-C7 alkanes, catalyst and polyolefin particles under polymerization conditions within a loop reactor, wherein, in operation, the process has a cavitation number of from 6 to 60 and the polymerization conditions comprise a polymerization temperature of from 38° C. to 121° C. and a polymerization pressure of from 27 bar to 50 bar. 2. The process of claim 1, wherein the cavitation number (Ca) is from 12 to 50. 3. The process of claim 1, wherein the cavitation number (Ca) is from 18 to 40. 4. The process of claim 1, wherein the cavitation number (Ca) is from 24 to 36. 5. The process of claim 1 further comprising an average circulation velocity (v) of at least 7.0 m/s. 6. The process of claim 1 further comprising an average circulation velocity (v) of at least 10.7 m/s. 7. The process of claim 1 further comprising an average circulation velocity (v) of at least 12.2 m/s. 8. The process of claim 1, wherein the polymerization temperature is from 75° C. to 110° C. 9. The process of claim 1, wherein the slurry comprises olefin monomer in a concentration of from 0.7 wt. % to 10.5 wt. %. 10. The process of claim 1, wherein the olefin monomer comprises ethylene. 11. The process of claim 1, wherein the process has a Euler Number (Eu) of at least 5. 12. The process of claim 1, wherein the process has a length/diameter/Euler Number ratio (L/D/Eu) of less than 184. 13. The process of claim 11, wherein the process has a length/diameter/Euler Number ratio (L/D/Eu) of less than 184. 14. The process of claim 1, wherein the slurry comprises greater than 48 wt. % polyolefin particles. 15. The process of claim 13, wherein the slurry comprises greater than 48 wt. % polyolefin particles. 16. An olefin polymerization process comprising: circulating a slurry comprising olefin monomer, liquid diluent, catalyst and polyolefin particles under polymerization conditions within a loop reactor, wherein, in operation, the process has a Euler Number (Eu) of at least 5. 17. The process of claim 16, wherein the Euler number (Eu) is at least 6. 18. The process of claim 16, wherein the Euler number (Eu) is at least 7. 19. The process of claim 16 further comprising a length/diameter/Euler Number ratio (L/D/Eu) of less than 184. 20. The process of claim 16 further comprising a length/diameter/Euler Number ratio (L/D/Eu) of less than 180. 21. The process of claim 16 further comprising a length/diameter/Euler Number ratio (L/D/Eu) of less than 175. 22. The process of claim 16 further comprising a length/diameter/Euler Number ratio (L/D/Eu) of less than 170. 23. The process of claim 16, wherein the slurry comprises greater than 48 wt. % polyolefin particles. 24. The process of claim 16, wherein the slurry comprises greater than 50 wt. % polyolefin particles. 25. The process of claim 16, wherein the slurry comprises greater than 52 wt. % polyolefin particles. 26. The process of claim 16 further comprising a length/diameter/Euler Number ratio (L/D/Eu) of less than 184 and wherein the slurry comprises greater than 48 wt. % polyolefin particles.
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