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Search result: 140 of 140 |
(WO/2006/130310) PROCESS FOR TRANSITIONING A REACTOR FROM A ZIEGLER-NATTA CATALYZED POLYMERIZATION TO A POLYMERIZATION CATALYZED BY ANOTHER TYPE OF CATALYST SYSTEM
- Biblio. Data
- Description
- Claims
- National Phase
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| Latest bibliographic data on file with the International Bureau
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| IPC: | C08F 2/34 (2006.01), C08F 2/42 (2006.01) | ||||||||||||||||||
| Applicants: | UNION CARBIDE CHEMICALS & PLASTICS TECHNOLOGY CORPORATION [US/US]; 2020 Dow Center, Midland, MI 48674 (US) (All Except US). TURNER, Michael, D. [US/US]; (US) (US Only). LEAL, Guadalupe, G. [US/US]; (US) (US Only). | ||||||||||||||||||
| Inventors: | TURNER, Michael, D.; (US). LEAL, Guadalupe, G.; (US). | ||||||||||||||||||
| Agent: | TERRY, Jane, M.; Union Carbide Chemicals & Plastics Technology, 2020 Dow Center, Midland, MI 48674 (US). | ||||||||||||||||||
| Priority Data: |
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| Title: | PROCESS FOR TRANSITIONING A REACTOR FROM A ZIEGLER-NATTA CATALYZED POLYMERIZATION TO A POLYMERIZATION CATALYZED BY ANOTHER TYPE OF CATALYST SYSTEM | ||||||||||||||||||
| Abstract: | A process for transitioning a continuous olefin polymerization reaction, catalyzed by a Ziegler-type catalyst, to a polymerization reaction catalyzed by another type of catalyst system. In this process, the introduction of the transition metal halide component of the Ziegler-type catalyst and the electron donor of the Ziegler-type catalyst into the reactor are discontinued, and the level of each of these components is reduced, using a catalyst inventory reduction step or steps, before and/or after the discontinuation of the catalyst components. The catalyst inventory reduction is eventually followed by the introduction of at least one reversible poison, such as CO2, and/or at least one irreversible poison into the reactor, and the circulation of the poison(s) within the reactor. The reactor is purged with an inert gas. Following this process, another catalyst system (or second catalyst system) is introduced into the reactor, and polymerization initiated. | ||||||||||||||||||
| Designated States: |
AE, AG, AL, AM, AT, AU, AZ, BA, BB, BG, BR, BW, BY, BZ, CA, CH, CN, CO, CR, CU, CZ, DE, DK, DM, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, HR, HU, ID, IL, IN, IS, JP, KE, KG, KM, KN, KP, KR, KZ, LC, LK, LR, LS, LT, LU, LV, LY, MA, MD, MG, MK, MN, MW, MX, MZ, NA, NG, NI, NO, NZ, OM, PG, PH, PL, PT, RO, RU, SC, SD, SE, SG, SK, SL, SM, SY, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, YU, ZA, ZM, ZW. African Regional Intellectual Property Org. (ARIPO) (BW, GH, GM, KE, LS, MW, MZ, NA, SD, SL, SZ, TZ, UG, ZM, ZW) Eurasian Patent Organization (EAPO) (AM, AZ, BY, KG, KZ, MD, RU, TJ, TM) European Patent Office (EPO) (AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HU, IE, IS, IT, LT, LU, LV, MC, NL, PL, PT, RO, SE, SI, SK, TR) African Intellectual Property Organization (OAPI) (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, ML, MR, NE, SN, TD, TG). | ||||||||||||||||||
| Publication Language: | English (EN) |
| Filing Language: | English (EN) |
