US5100979A
Expired / Lapsed
US
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Process for producing ethylene/1-octene copolymers having reduced stickiness
Assignee: Union Carbide Chemicals and Plastics Technology LLC
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Filing: 1990-12-10
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Granted: 1992-03-31
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Expires: 2010-12-10
Abstract
Abstract A process comprising contacting a mixture comprising ethylene and 1-octene in the gas phase, in a fluidized bed reactor, under polymerization conditions, with a catalyst system comprising: (a) the reaction product of a vanadium compound and an electron donor impregnated into an inorganic support; (b) a halocarbon promoter; and (c) a hydrocarbyl aluminum cocatalyst with the following proviso: (i) the partial pressure of ethylene is in the range of about 50 to about 90 psi; (ii) the partial pressure of 1-octene is in the range of about 1.5 to about 2.5 psi; (iii) the temperature in the reactor is in the range of about 5° C. to about 20° C. above the dew point of 1-octene; (iv) the molar ratio of 1-octene to ethylene is in the range of about 0.02:1 to about 0.04:1; and, optionally, (v) the superficial gas velocity is in the range of about 1.4 to about 2.7 feet per second.
Inventors
- 👤 Ronald S. Eisinger
- 👤 Kiu H. Lee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 03:02
CPC Classifications
C; C08; C08F; C08F210/00; C08F210/16; Y; Y10; Y10S; Y10S526/00; Y10S526/901
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
154 words
A process comprising contacting a mixture comprising ethylene and 1-octene in the gas phase, in a fluidized bed reactor, under polymerization conditions, with a catalyst system comprising: (a) the reaction product of a vanadium compound and an electron donor impregnated into an inorganic support; (b) a halocarbon promoter; and (c) a hydrocarbyl aluminum cocatalyst with the following proviso: (i) the partial pressure of ethylene is in the range of about 50 to about 90 psi; (ii) the partial pressure of 1-octene is in the range of about 1.5 to about 2.5 psi; (iii) the temperature in the reactor is in the range of about 1° C. to about 30° C. above the dew point of 1-octene; (iv) the molar ratio of 1-octene to ethylene is in the range of about 0.02:1 to about 0.04:1; and, optionally, (v) the superficial gas velocity is in the range of about 1.4 to about 2.7 feet per second.
Claim 2
Dependent Claim
154 words
A process comprising contacting a mixture comprising ethylene and 1-octene in the gas phase, in a fluidized bed reactor, under polymerization conditions, with a catalyst system comprising: (a) the reaction product of a vanadium compound and an electron donor impregnated into an inorganic support; (b) a halocarbon promoter; and (c) a hydrocarbyl aluminum cocatalyst with the following proviso: (i) the partial pressure of ethylene is in the range of about 50 to about 90 psi; (ii) the partial pressure of 1-octene is in the range of about 1.5 to about 2.5 psi; (iii) the temperature in the reactor is in the range of about 1° C. to about 30° C. above the dew point of 1-octene; (iv) the molar ratio of 1-octene to ethylene is in the range of about 0.02:1 to about 0.04:1; and, optionally, (v) the superficial gas velocity is in the range of about 1.4 to about 2.7 feet per second.
Claim 3
Dependent Claim
21 words
The process of claim 1 wherein the electron donor is an organic Lewis base in which the vanadium compound is soluble.
Claim 4
Dependent Claim
13 words
The process of claim 1 wherein R has 1 to 14 carbon atoms.
Claim 5
Dependent Claim
11 words
The process of claim 1 wherein the electron donor is tetrahydrofuran.
Claim 6
Dependent Claim
45 words
The process of claim 1 wherein the promoter has the formula: R.sub.y CX.sub.(4-y) wherein R =hydrogen or an unsubstituted or halogen substituted alkyl radical having 1 to 6 carbon atoms and each R is the same or different; X=a halogen; and y=0, 1, or 2.
Claim 7
Dependent Claim
16 words
The process of claim 5 wherein the promoter is chloroform, methylene chloride, 1,1,1-trichloroethane, trichlorofluoromethane, or 1,1-difluorotetrachloroethane.
Claim 8
Dependent Claim
23 words
The process of claim 1 wherein the partial pressure of ethylene is in the range of about 65 psi to about 75 psi.
Claim 9
Dependent Claim
23 words
The process of claim 1 wherein the partial pressure of 1-octene is in the range of about 1.6 psi to about 2.2 psi.
Claim 10
Dependent Claim
29 words
The process of claim 1 wherein the temperature in the reactor is in the range of about 5° C. to about 20° C. above the dew point of 1-octene.
Claim 11
Dependent Claim
23 words
The process of claim 1 wherein the molar ratio of 1-octene to ethylene is in the range of about 0.022:1 to about 0.032:1.
Claim 12
Dependent Claim
23 words
The process of claim 1 wherein the superficial gas velocity is in the range of about 1.8 to about 2.5 feet per second.
Claim 13
Dependent Claim
29 words
The process of claim 1 wherein hydrogen is introduced into the mixture and the molar ratio of hydrogen to ethylene is in the range of up to about 0.1:1.
Claim 14
Dependent Claim
10 words
The process of claim 1 wherein the process is continuous.
Claim 15
Dependent Claim
43 words
The process of claim 1 wherein one or more additional alpha-olefins are introduced into the mixture with the proviso that the total amount of additional reacted alpha-olefins is no greater than about 15 percent by weight of the copolymer produced by the process.
Claim 16
Dependent Claim
13 words
The process of claim 12 wherein the additional alpha-olefins are propylene and/or 1-butene.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-03-31 | 1995-09-30 | 1996-03-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-03-31 | 1999-09-30 | 2000-03-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-03-31 | 2003-09-30 | 2004-03-31 | $7700.00 | Window Closed / Lapsed |