Claims
- 1. A method for vapor phase polymerizing 1,3-butadiene into high cis-1,4-polybutadiene in a process comprising the steps of:(1) charging said 1,3-butadiene and a catalyst comprising: (a) an organoaluminum compound, (b) a soluble organonickel compound, and (c) hydrogen fluoride or a hydrogen fluoride complex into a reaction zone; wherein the 1,3-butadiene is maintained in the vapor phase in said reaction zone by a suitable combination of temperature and pressure such tat a portion of the monomer in the reaction zone is a liquid that is not absorbed in or on solid particulate matter; (2) allowing said 1,3-butadiene to polymerize into high cis-1,4-polybutadiene at a temperature within the range of 20° C. to 120° C.; and (3) withdrawing said high cis-1,4-polybutadiene from said reaction zone.
Parent Case Info
This application is a division of U.S. Pat. application Ser. No. 09/543,045, filed Apr. 5, 2000, now U.S. Pat. No. 6,384,156 which is a continuation-in-part of prior U.S. application Ser. No. 09/179,218 filed Oct. 27, 1998, now U.S. Pat. No. 6,096,840, which was a continuation-in-part of U.S. application Ser. No. 08/510,375 filed Aug. 2, 1995 and, now U.S. Pat. No. 5,834,571, which was a continuation-in-part of U.S. application Ser. No. 08/284,797 filed Aug. 2, 1994, now U.S. Pat. No. 5,453,471.
US Referenced Citations (21)
Foreign Referenced Citations (2)
Number |
Date |
Country |
595291 |
Aug 1987 |
AU |
56-4608 |
Jan 1981 |
JP |
Continuation in Parts (3)
|
Number |
Date |
Country |
Parent |
09/179218 |
Oct 1998 |
US |
Child |
09/543045 |
|
US |
Parent |
08/510375 |
Aug 1995 |
US |
Child |
09/179218 |
|
US |
Parent |
08/284797 |
Aug 1994 |
US |
Child |
08/510375 |
|
US |