US4377720A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of linear olefin products
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1981-12-14
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Granted: 1983-03-22
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Expires: 2001-12-14
Abstract
Abstract A process for preparing linear alpha olefins and waxes having a total product Mn in the range 200 to 700 comprising at least 90 mole percent linear alpha olefins which includes polymerizing an ethylene containing gas in the presence of the reaction product of a zirconium halide compound with an aluminum cocatalyst selected from the group consisting of dialkyl aluminum alkoxides or aryloxides and dialkyl aluminum disubstituted amides in the presence of a diluent at a temperature of about 50 DEG to 200 DEG C. and an ethylene pressure above about 3.5 MPa, wherein the Mn of said reaction product is controlled by the molar ratio of said aluminum cocatalyst/Zr halide, said molar ratio being less than about 1.
Inventors
- 👤 Arthur W. Langer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:45
CPC Classifications
C; C07; C07C; C07C2/00; C07C2/02; C07C2/04; C07C2/06; C07C2/08; C07C2/26; C07C2/30; C08; C08F; C08F10/00; C07C2527/00; C07C2527/06; C07C2527/135; C07C2531/00; C07C2531/02; C07C2531/12; C07C2531/14; C07C2531/26; C07C2531/38
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
183 words
A process for preparing linear alpha olefins and waxes having a total product M n in the range 200 to 700, which comprises polymerizing an ethylene-containing gas in the presence of the reaction product of a Zr metal compound having the formula ZrX a A b wherein a=3 or 4, b=0 or 1 and a+b=4 and X=Cl or Br and A is Cl, Br, I, OR or OOCR with an aluminum cocatalyst selected from the group consisting of R 2 AlOR' and R 2 AlNR 2 ", wherein R is a primary, secondary or tertiary alkyl group having about 1 to about 20 carbon atoms and R' or R" is a primary, secondary or tertiary alkyl group having about 1 to about 20 carbon atoms or an aryl or substituted aryl group, in the presence of a diluent at a temperature of about 50° to 200° C. and an ethylene pressure above about 3.5 MPa, wherein the M n of said reaction product, is controlled by the molar ratio of aluminum cocatalyst ZrCl 4 , said molar ratio being less than about 1.
Claim 2
Dependent Claim
183 words
A process for preparing linear alpha olefins and waxes having a total product M n in the range 200 to 700, which comprises polymerizing an ethylene-containing gas in the presence of the reaction product of a Zr metal compound having the formula ZrX a A b wherein a=3 or 4, b=0 or 1 and a+b=4 and X=Cl or Br and A is Cl, Br, I, OR or OOCR with an aluminum cocatalyst selected from the group consisting of R 2 AlOR' and R 2 AlNR 2 ", wherein R is a primary, secondary or tertiary alkyl group having about 1 to about 20 carbon atoms and R' or R" is a primary, secondary or tertiary alkyl group having about 1 to about 20 carbon atoms or an aryl or substituted aryl group, in the presence of a diluent at a temperature of about 50° to 200° C. and an ethylene pressure above about 3.5 MPa, wherein the M n of said reaction product, is controlled by the molar ratio of aluminum cocatalyst ZrCl 4 , said molar ratio being less than about 1.
Claim 3
Dependent Claim
14 words
A process according to claim 1 wherein said molar ratio is less than 0.5.
Claim 4
Dependent Claim
16 words
A process according to claim 1 wherein said temperature is about 100° to about 150° C.
Claim 5
Dependent Claim
17 words
A process according to claim 2 or 3 wherein said ethylene pressure is at least 5.5 MPa.
Claim 6
Dependent Claim
14 words
A process according to claim 1 wherein said zirconium chloride is ZrCl 4 .
Claim 7
Dependent Claim
15 words
A process according to claim 1 wherein said aluminum cocatalyst is diethyl aluminum diethyl amide.
Claim 8
Dependent Claim
16 words
A process according to claim 1 or 5 wherein said aluminum cocatalyst is diethyl aluminum ethoxide.
Claim 9
Dependent Claim
16 words
A process according to claim 1 or 5 wherein said aluminum cocatalyst is diethyl aluminum phenoxide.
Claim 10
Dependent Claim
38 words
A process according to claim 1 wherein said R' or R" of the R 2 AlOR' and R 2 AlNR 2 " are unhindered primary, secondary or tertiary alkyl groups having about 1 to about 20 carbon atoms.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1986-03-21 | 1986-09-20 | 1987-03-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-03-21 | 1990-09-20 | 1991-03-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-03-21 | 1994-09-20 | 1995-03-22 | $7700.00 | Window Closed / Lapsed |