Method of ethylene polymerization
Abstract
Abstract AN ETHYLENE POLYMER HAVING OPTIONAL MOLECULAR WEIGHT DISTRIBUTION FROM NARROW TO BROAD IS EASILY PRODUCED IN GOOD SLURRY STATE, IN HIGH SOLVENT EFFICIENCY AND IN HIGH CATALYST EFFICIENCY, BY POLYMERIZING ETHYLENE ALONE OR TOGETHER WITH OTHER UNSATURATED HYDROCARBON IN THE PRESENCE OR ABSENCE OF HYDROGEN, USING A CATALYST COMPRISING (1) AS A FIRST COMPONENT A SUBSTANCE PREPARED BY A METHOD WHICH COMPRISES REACTING A VANADIUM COMPOUND WITH A PHOSPHORIC ACID AND/OR ITS DERIVATIVE, TREATING THE REACTION PRODUCT WITH AN ALCOHOL, SEPARATING FROM THE ALCOHOL-TREATED PRODUCT AN ALCOHOL SOLUBLE PRODUCT IN THE FORM OF A SOLID AND ADDING 1 TO 20% BY WEIGHT OF WATER TO SAID SOLID ALCOHOL SOLUBLE PRODUCT AND (2) AS A SECOND COMPONENT A SUBSTANCE COMPOSED MAINLY OF AN ORGANO-ALUMINUM COMPOUND HAVING THE FORMULA, RNA1X3-N WHEREIN R IS A HYDROCARBON GROUP HAVING 1 TO 8 CARBON ATOMS; X IS A HALOGEN ATOM, AN ALKOXY GROUP OR A HYDROGEN ATOM; AND N IS A POSITIVE NUMBER OF 3 OR LESS.
Inventors
- 👤 K Maemoto
- 👤 T Sano
- 👤 A Kobayashi
Bibliographic Details
Claims Analysis
Total Claims: 0References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-03-19 | 1976-09-18 | 1977-03-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-19 | 1980-09-18 | 1981-03-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-19 | 1984-09-18 | 1985-03-20 | $7700.00 | Window Closed / Lapsed |