US4409409A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Two stage olefin wax process
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1982-06-10
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Granted: 1983-10-11
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Expires: 2002-06-10
Abstract
Abstract This invention relates to an improved process for preparing linear olefins and waxes, particularly linear olefin waxes. More particularly, this invention relates to an improved process for polymerizing ethylene to obtain linear olefins and waxes having a number average molecular weight (M n ) ranging from about 500 to 5000. The process can be generally described as a two-stage process wherein the first stage is an ethylene oligomerization followed by a second stage metathesis. Still more particularly, this invention relates to an improved process for polymerizing ethylene to obtain a product comprising at least 70 weight percent linear olefin waxes.
Inventors
- 👤 Arthur W. Langer, Jr.
- 👤 Gerald Doyle
- 👤 Terry J. Burkhardt
- 👤 Ralph W. Looney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:09
CPC Classifications
C; C07; C07C; C07C9/00; C07C9/22; C07C11/00; C07C11/02; C07C2/00; C07C2/02; C07C2/04; C07C2/06; C07C2/08; C07C2/26; C07C2/30; C07C6/00; C07C6/02; C07C6/04; C07C2521/00; C07C2521/02; C07C2521/04; C07C2521/06; C07C2521/08; C07C2523/00; C07C2523/16; C07C2523/24; C07C2523/30; C07C2523/32; C07C2523/36; C07C2523/70; C07C2523/76; C07C2523/84; C07C2523/85; C07C2523/88; C07C2523/882; C07C2527/00; C07C2527/06; C07C2527/132; C07C2527/135; C07C2531/00; C07C2531/02; C07C2531/12; C07C2531/14; C07C2531/16; C07C2531/20; C07C2531/26; C07C2531/34; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/52
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
70 words
A process for preparing linear waxes having an M n of about 500 to about 5000 which comprises the steps of: (a) oligomerizing ethylene to an ologomerization product having an M n of about 200 to 700; (b) metathesizing said oligomerization product to form a linear olefin wax; and (c) removing from said linear olefin wax essentially all products having a carbon number of less than about C 30 .
Claim 2
Dependent Claim
70 words
A process for preparing linear waxes having an M n of about 500 to about 5000 which comprises the steps of: (a) oligomerizing ethylene to an ologomerization product having an M n of about 200 to 700; (b) metathesizing said oligomerization product to form a linear olefin wax; and (c) removing from said linear olefin wax essentially all products having a carbon number of less than about C 30 .
Claim 3
Dependent Claim
13 words
A process according to claim 1 further including hydrogenating said linear olefin wax.
Claim 4
Dependent Claim
30 words
A process according to claim 1 wherein a catalyst system for said oligomerization is a Group IVB metal compound activated by a Group II-III metal alkyl or metal hydride compound.
Claim 5
Dependent Claim
47 words
A process according to claim 3 wherein said Group IVB metal compound has the formula: MX.sub.n (OR').sub.4-n wherein M is Zr or Hf, X is Cl or Br, n is 0 to 4 and R' is selected from the groups consisting of alkyl, aryl, aralkyl and cycloalkyl.
Claim 6
Dependent Claim
76 words
A process according to claim 1 wherein a catalyst for said metathesis process is selected from the group consisting of CoO.MoO 3 .Al 2 O 3 , Re 2 O 7 .Al 2 O 3 , WO 3 .SiO 2 , Mo(CO) 6 .Al 2 O 3 , WCl 6 .SnBu 4 , WCl 6 --EtAlCl 2 --EtOH, MoCl 5 --R 3 Al--O 2 and RAlCl 2 --R 4 N + Mo(CO) 5 Cl - .
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-10-10 | 1987-04-11 | 1987-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-10-10 | 1991-04-11 | 1991-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-10-10 | 1995-04-11 | 1995-10-11 | $7700.00 | Window Closed / Lapsed |