US4239930A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Continuous oligomerization process
Assignee: Pearsall Chemical Co
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Filing: 1979-05-17
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Granted: 1980-12-16
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Expires: 1999-05-17
Abstract
Abstract Alpha-olefins are oligomerized to a product useful as a synthetic lubricant in a continuous process utilizing a promoted boron trifluoride catalyst. The oligomerization is carried out in a system comprising a plurality of loop recycle reactors arranged in series, the reaction being preferably carried out such that: (A) The total residence time of alpha-olefin monomer/oligomerization product in the system is from about 1 to about 2 hours; and (B) The flow rate through each of the plurality of loop recycle reactors effects a turnover of reactor contents of each reactor at least once every 5 minutes.
Inventors
- 👤 N. Lee Allphin
- 👤 Fred S. Valentine
- 👤 Gary W. Grams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:18
CPC Classifications
C; C07; C07C; C07C2/00; C07C2/02; C07C2/04; C07C2/06; C07C2/08; C07C2/14; C07C2/20; C07C2527/00; C07C2527/06; C07C2527/08; C07C2527/12; C07C2527/1213; C07C2531/00; C07C2531/02
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
107 words
In a process for the continuous production of an oligomer product having a desirable oligomer distribution, said process involving the oligomerization of a C 8 -C 12 alpha-olefin monomer in the presence of a promoted boron trifluoride catalyst, the improvement wherein the oligomerization is carried out in a system comprising a plurality of loop recycle reactors in series, such that: (a) the total residence time of alpha-olefin monomer/oligomer product in said system is from about one to two hours; and (b) the flow rate through each of said plurality of loop recycle reactors affects a turnover of contents in each reactor at least once every five minutes.
Claim 2
Dependent Claim
107 words
In a process for the continuous production of an oligomer product having a desirable oligomer distribution, said process involving the oligomerization of a C 8 -C 12 alpha-olefin monomer in the presence of a promoted boron trifluoride catalyst, the improvement wherein the oligomerization is carried out in a system comprising a plurality of loop recycle reactors in series, such that: (a) the total residence time of alpha-olefin monomer/oligomer product in said system is from about one to two hours; and (b) the flow rate through each of said plurality of loop recycle reactors affects a turnover of contents in each reactor at least once every five minutes.
Claim 3
Dependent Claim
33 words
The improved process of claim 1 wherein the flow rate through each of said plurality of loop recycle reactors affects a turnover of contents in each reactor at least once every three minutes.
Claim 4
Dependent Claim
25 words
The improved process of claim 1 wherein the height to diameter ratio of each of said loop recycle reactors is from 2:1 to about 12:1.
Claim 5
Dependent Claim
145 words
A process for the continuous production of an oligomer product having a desirable oligomer distribution which comprises: (a) continuously introducing into a first loop recycle reactor of a plurality of loop recycle reactors, in, series: (i) alpha-olefin feedstock; (ii) boron trifluoride; and (iii) a promoter for the boron trifluoride (b) establishing in said first loop recycle reactor a turnover of contents at least once every five minutes; (c) continuously withdrawing a portion of the contents of said first loop recycle reactor and forwarding said withdrawn portion to at least one additional loop recycle reactor; (d) continuously introducing into each of said additional loop recycle reactors further amounts of boron trifluoride; (e) establishing in each of said additional loop recycle reactors a turnover of contents at least once every five minutes; and (f) continuously withdrawing oligomer product from the last of said additional loop recycle reactors.
Claim 6
Dependent Claim
145 words
A process for the continuous production of an oligomer product having a desirable oligomer distribution which comprises: (a) continuously introducing into a first loop recycle reactor of a plurality of loop recycle reactors, in, series: (i) alpha-olefin feedstock; (ii) boron trifluoride; and (iii) a promoter for the boron trifluoride (b) establishing in said first loop recycle reactor a turnover of contents at least once every five minutes; (c) continuously withdrawing a portion of the contents of said first loop recycle reactor and forwarding said withdrawn portion to at least one additional loop recycle reactor; (d) continuously introducing into each of said additional loop recycle reactors further amounts of boron trifluoride; (e) establishing in each of said additional loop recycle reactors a turnover of contents at least once every five minutes; and (f) continuously withdrawing oligomer product from the last of said additional loop recycle reactors.
Claim 7
Dependent Claim
18 words
The process of claim 4 wherein the oligomerization is carried out in three loop recycle reactors in series.
Claim 8
Dependent Claim
15 words
The process of claim 4 wherein said alpha-olefin contains from 8 to 12 carbon atoms.
Claim 9
Dependent Claim
10 words
The process of claim 6 wherein said alpha-olefin is 1-decene.
Claim 10
Dependent Claim
23 words
The process of claim 4 wherein said promoter is selected from water, lower aliphatic alcohols, low molecular weight carboxylic acids, esters and ketones.
Claim 11
Dependent Claim
41 words
The process of claim 8 wherein said promoter is present in each of said plurality of loop recycle reactors in an amount of from about 0.01 weight % to about 3.0 weight % based on the weight of the alpha-olefin feedstock.
Claim 12
Dependent Claim
30 words
The process of claim 4 wherein boron trifluoride is present in each of said plurality of loop recycle reactors in an amount sufficient to saturate said alpha-olefin feedstock and promoter.
Claim 13
Dependent Claim
27 words
The process of claim 10 wherein each of said plurality of loop recycle reactors has a boron trifluoride pressure of from about 2 to about 100 psi.
Claim 14
Dependent Claim
27 words
The process of claim 4 wherein each of said plurality of loop recycle reactors is maintained at a temperature of from about 10° to about 50° C.
Claim 15
Dependent Claim
25 words
The process of claim 12 wherein the temperature of each of said plurality of loop recycle reactors is maintained within the range of 20°-30° C.
Claim 16
Dependent Claim
26 words
The process of claim 4 wherein the contents of each of said plurality of loop recycle reactors are turned over at least once every 3 minutes.
Claim 17
Dependent Claim
24 words
The process of claim 5 wherein the total residence time for said plurality of loop recycle reactors is from about 1 to 2 hours.
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) | 1983-12-16 | 1984-06-16 | 1984-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-12-16 | 1988-06-16 | 1988-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-12-16 | 1992-06-16 | 1992-12-16 | $7700.00 | Window Closed / Lapsed |