US4528416A
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Ethylene oligomerization process carried out in a monohydric/dihydric alcohol solvent mixture
Assignee: Shell USA Inc
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Filing: 1984-10-09
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Granted: 1985-07-09
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Expires: 2004-10-09
Abstract
Abstract An improved process for the conversion of ethylene to its linear alpha-olefin oligomers by contact with a catalytic nickel complex dissolved in a polar organic solvent. The improvement relates to the use as solvent in such a process of a mixture of certain monohydric and dihydric alcohols in specified proportions. Practice of the invention provides enhanced rate of ethylene oligomerization and/or modification of the carbon number distribution of the product oligomer mixture.
Inventors
- 👤 Eugene F. Lutz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:28
CPC Classifications
C; C07; C07C; C07C2/00; C07C2/02; C07C2/04; C07C2/06; C07C2/08; C07C2/26; C07C2/36; C07C2531/00; C07C2531/16; C07C2531/24; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/52
Claims Analysis
Total Claims: 30
Claim 1
Independent Claim
122 words
In a process for the preparation of oligomers of ethylene which comprises reacting ethylene in a polar solvent and in the presence of a catalyst which is a chelate of nickel with a bidentate ligand, the improvement which comprises reacting the ethylene under a partial pressure of ethylene of at least about 800 psig in a solvent mixture which comprises between about 40 and 82 percent by weight of one or more lower aliphatic dihydric alcohols and between about 18 to 60 percent by weight of one or more lower aliphatic monohydric alcohols, said percentages by weight being calculated on the total weight of the one or more lower aliphatic dihydric alcohols and the lower aliphatic monohydric alcohols in the solvent mixture.
Claim 2
Dependent Claim
122 words
In a process for the preparation of oligomers of ethylene which comprises reacting ethylene in a polar solvent and in the presence of a catalyst which is a chelate of nickel with a bidentate ligand, the improvement which comprises reacting the ethylene under a partial pressure of ethylene of at least about 800 psig in a solvent mixture which comprises between about 40 and 82 percent by weight of one or more lower aliphatic dihydric alcohols and between about 18 to 60 percent by weight of one or more lower aliphatic monohydric alcohols, said percentages by weight being calculated on the total weight of the one or more lower aliphatic dihydric alcohols and the lower aliphatic monohydric alcohols in the solvent mixture.
Claim 3
Dependent Claim
41 words
The process of claim 1, wherein the one or more lower aliphatic dihydric alcohols are C 2 to C 7 aliphatic dihydric alcohols and the one or more lower aliphatic monohydric alcohols are C 2 to C 7 aliphatic monohydric alcohols.
Claim 4
Dependent Claim
19 words
The process of claim 2, wherein the ethylene is reacted at a temperature of at least about 80° C.
Claim 5
Dependent Claim
18 words
The process of claim 3, wherein the one or more aliphatic monohydric alcohols are primary or secondary alcohols.
Claim 6
Dependent Claim
23 words
The process of claim 4, wherein the one or more aliphatic dihydric alcohols are alpha-omega dihydric alcohols of four to six carbon atoms.
Claim 7
Dependent Claim
21 words
The process of claim 5, wherein the partial pressure of ethylene is in the range from about 900 to 2000 psig.
Claim 8
Dependent Claim
18 words
The process of claim 6, wherein ethylene is reacted at a temperature of at least about 85° C.
Claim 9
Dependent Claim
24 words
The process of claim 7, wherein the one or more aliphatic monohydric alcohols are selected from the group consisting of n-propanol, n-butanol and n-pentanol.
Claim 10
Dependent Claim
12 words
The process of claim 8, wherein 1,4-butanediol is the aliphatic dihydric alcohol.
Claim 11
Dependent Claim
21 words
The process of claim 9, wherein the partial pressure of ethylene is in the range from about 1000 to 1800 psig.
Claim 12
Dependent Claim
21 words
The process of claim 10, wherein the partial pressure of ethylene is in the range from about 1100 to 1500 psig.
Claim 13
Dependent Claim
21 words
The process of claim 3, wherein the partial pressure of ethylene is in the range from about 1100 to 1500 psig.
Claim 14
Dependent Claim
43 words
The process of claim 1, wherein the solvent mixture comprises between about 20 and 45 percent by weight of the one or more aliphatic monohydric alcohols and between about 55 and 80 percent by weight of the one or more aliphatic dihydric alcohols.
Claim 15
Dependent Claim
43 words
The process of claim 3, wherein the solvent mixture comprises between about 20 and 45 percent by weight of the one or more aliphatic monohydric alcohols and between about 55 and 80 percent by weight of the one or more aliphatic dihydric alcohols.
Claim 16
Dependent Claim
42 words
The process of claim 6, wherein the solvent mixture comprises between 20 and 40 percent by weight of the one or more aliphatic monohydric alcohols and between about 60 and 80 percent by weight of the one or more aliphatic dihydric alcohols.
Claim 17
Dependent Claim
43 words
The process of claim 3, wherein the solvent mixture comprises between about 35 and 60 percent by weight of the one or more aliphatic monohydric alcohols and between about 40 and 65 percent by weight of the one or more aliphatic dihydric alcohols.
Claim 18
Dependent Claim
43 words
The process of claim 1, wherein the solvent mixture comprises between about 20 and 35 percent by weight of the one or more aliphatic monohydric alcohols and between about 65 and 80 percent by weight of the one or more aliphatic dihydric alcohols.
Claim 19
Dependent Claim
43 words
The process of claim 3, wherein the solvent mixture comprises between about 20 and 35 percent by weight of the one or more aliphatic monohydric alcohols and between about 65 and 80 percent by weight of the one or more aliphatic dihydric alcohols.
Claim 20
Dependent Claim
43 words
The process of claim 6, wherein the solvent mixture comprises between about 20 and 35 percent by weight of the one or more aliphatic monohydric alcohols and between about 65 and 80 percent by weight of the one or more aliphatic dihydric alcohols.
Claim 21
Dependent Claim
121 words
In a process for the preparation of oligomers of ethylene which comprises reacting ethylene in a solvent and in the presence of a catalyst which is a chelate of nickel with a bidentate ligand, the improvement which comprises reacting the ethylene at a temperature of at least about 85° C. and under a partial pressure of ethylene between about 1100 and 1500 psig in a solvent mixture which comprises between about 60 and 80 percent by weight of 1,4-butanediol and between about 20 and 40 percent by weight of one or more alcohols selected from the group consisting of n-propanol and n-butanol, said percentages by weight being calculated on the total weight of 1,4-butanediol, n-propanol and n-butanol in the solvent mixture.
Claim 22
Dependent Claim
121 words
In a process for the preparation of oligomers of ethylene which comprises reacting ethylene in a solvent and in the presence of a catalyst which is a chelate of nickel with a bidentate ligand, the improvement which comprises reacting the ethylene at a temperature of at least about 85° C. and under a partial pressure of ethylene between about 1100 and 1500 psig in a solvent mixture which comprises between about 60 and 80 percent by weight of 1,4-butanediol and between about 20 and 40 percent by weight of one or more alcohols selected from the group consisting of n-propanol and n-butanol, said percentages by weight being calculated on the total weight of 1,4-butanediol, n-propanol and n-butanol in the solvent mixture.
Claim 23
Dependent Claim
18 words
The process of claim 1, wherein the ligand is an o-dihydrocarbylphosphinobenzoic acid or an alkali metal salt thereof.
Claim 24
Dependent Claim
17 words
The process of claim 21, wherein the ligand is o-diphenylphosphinobenzoic acid or an alkali metal salt thereof.
Claim 25
Dependent Claim
18 words
The process of claim 6, wherein the ligand is an o-dihydrocarbylphosphinobenzoic acid or an alkali metal salt thereof.
Claim 26
Dependent Claim
17 words
The process of claim 23, wherein the ligand is o-diphenylphosphinobenzoic acid or an alkali metal salt thereof.
Claim 27
Dependent Claim
18 words
The process of claim 15, wherein the ligand is an o-dihydrocarbylphosphinobenzoic acid or an alkali metal salt thereof.
Claim 28
Dependent Claim
17 words
The process of claim 25, wherein the ligand is o-diphenylphosphinobenzoic acid or an alkali metal salt thereof.
Claim 29
Dependent Claim
18 words
The process of claim 20, wherein the ligand is an o-dihydrocarbylphosphinobenzoic acid or an alkali metal salt thereof.
Claim 30
Dependent Claim
17 words
The process of claim 27, wherein the ligand is o-diphenylphosphinobenzoic acid or an alkali metal salt thereof.
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1988-07-08 | 1989-01-07 | 1989-07-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-07-08 | 1993-01-07 | 1993-07-09 | $3760.00 | Window Closed / Lapsed |
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