US4242530A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for separating isobutene from C4 streams
Assignee: Catalytic Distillation Technologies
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Filing: 1978-07-27
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Granted: 1980-12-30
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Expires: 1998-07-27
Abstract
Abstract A method for the separation of isobutene from a mixture comprising n-butene and isobutene comprising feeding a C4 stream containing n-butene and isobutene to a distillation column reactor into a feed zone contacting the stream with fixed bed acidic cation exchange resin to form diisobutene which passes to the bottom of the column, said n-butene being removed overhead. The reaction and distillation occur concurrently.
Inventors
- 👤 Lawrence A. Smith, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 03:33
CPC Classifications
B; B01; B01D; B01D3/00; B01D3/009; B01J; B01J8/00; B01J8/02; C; C07; C07C; C07C1/00; C07C1/20; C07C2/00; C07C2/02; C07C2/04; C07C2/06; C07C2/08; C07C2/26; C07C2/28; C07C7/00; C07C7/148; C07C7/177; B01J2208/00; B01J2208/00008; B01J2208/00017; B01J2208/00026; B01J2208/00035; B01J2208/0007; B01J2208/00106; B01J2208/00168; B01J2208/00247; B01J2208/00539; B01J2208/00548; B01J2208/00557; B01J2208/00796; B01J2208/00805; B01J2208/00814; B01J2219/00; B01J2219/30; B01J2219/302; B01J2219/30276; B01J2219/30292; B01J2219/304; B01J2219/30475; C07C2531/00; C07C2531/02; C07C2531/06; C07C2531/08; Y; Y02; Y02P; Y02P20/00; Y02P20/10; Y10; Y10S; Y10S585/00; Y10S585/919; Y10S585/921
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
118 words
A method of separating isoolefins from a mixture containing isoolefins and normal olefins comprising: (a) feeding a mixture containing an isoolefin and the corresponding normal olefin to a distillation column reactor into a feed zone, (b) concurrently in said distillation column reactor: (1) contacting said mixture with a fixed bed acidic cation exchange resin, thereby catalytically reacting the isoolefin with itself to form a dimer, and (2) fractionating the resulting mixture of dimer and normal olefin in said fixed bed acidic cation exchange resin, (c) withdrawing the dimer from the distillation column at a point below said feed zone, and (d) withdrawing the normal olefin from the distillation column at a point above the acidic cation exchange resin.
Claim 2
Independent Claim
118 words
A method of separating isoolefins from a mixture containing isoolefins and normal olefins comprising: (a) feeding a mixture containing an isoolefin and the corresponding normal olefin to a distillation column reactor into a feed zone, (b) concurrently in said distillation column reactor: (1) contacting said mixture with a fixed bed acidic cation exchange resin, thereby catalytically reacting the isoolefin with itself to form a dimer, and (2) fractionating the resulting mixture of dimer and normal olefin in said fixed bed acidic cation exchange resin, (c) withdrawing the dimer from the distillation column at a point below said feed zone, and (d) withdrawing the normal olefin from the distillation column at a point above the acidic cation exchange resin.
Claim 3
Dependent Claim
22 words
The method according to claim 1 wherein said isoolefin has from four to six carbon atoms and the normal olefin corresponds thereto.
Claim 4
Independent Claim
95 words
A method for separating isobutene from a mixture containing n-butene and isobutene comprising: (a) feeding a mixture containing n-butene and isobutene to a distillation column reactor into a feed zone, (b) concurrently: (1) contacting said mixture with a fixed bed acid cation exchange resin, thereby catalytically reacting isobutene with itself to form diisobutene, and (2) fractionating the resulting mixture comprising diisobutene and n-butene, (c) withdrawing said diisobutene from said distillation column reactor at a point below said feed zone, and (d) withdrawing n-butene from said distillation column reactor at a point above the feed zone.
Claim 5
Independent Claim
95 words
A method for separating isobutene from a mixture containing n-butene and isobutene comprising: (a) feeding a mixture containing n-butene and isobutene to a distillation column reactor into a feed zone, (b) concurrently: (1) contacting said mixture with a fixed bed acid cation exchange resin, thereby catalytically reacting isobutene with itself to form diisobutene, and (2) fractionating the resulting mixture comprising diisobutene and n-butene, (c) withdrawing said diisobutene from said distillation column reactor at a point below said feed zone, and (d) withdrawing n-butene from said distillation column reactor at a point above the feed zone.
Claim 6
Dependent Claim
19 words
The method according to claim 3 wherein said mixture is a C 4 stream additionally containing n-butane and isobutane.
Claim 7
Dependent Claim
25 words
The method according to claim 3 wherein the temperature of said column is the boiling point of the mixture under the pressure in said column.
Claim 8
Dependent Claim
25 words
The method according to claim 3 wherein said reacting and fractioning are carried out at a pressure in the range of 10 to 300 psig.
Claim 9
Dependent Claim
21 words
The method according to claim 3 wherein said feed zone is in the lower portion of said fixed bed of resin.
Claim 10
Independent Claim
89 words
A method of preparing diisobutene comprising: (a) feeding a C 4 hydrocarbon stream containing isobutene to a distillation column reactor into a feed zone, (b) concurrently in said distillation column reactor: (1) contacting said stream with a fixed bed acid cation exchange resin, thereby catalytically reacting isobutene with itself to form diisobutene, and (2) fractionating the resulting mixture of C 4 hydrocarbons and diisobutene in said fixed bed acidic cation exchange resin, and (c) withdrawing said diisobutene from said distillation column reactor at a point below said feed zone.
Claim 11
Independent Claim
89 words
A method of preparing diisobutene comprising: (a) feeding a C 4 hydrocarbon stream containing isobutene to a distillation column reactor into a feed zone, (b) concurrently in said distillation column reactor: (1) contacting said stream with a fixed bed acid cation exchange resin, thereby catalytically reacting isobutene with itself to form diisobutene, and (2) fractionating the resulting mixture of C 4 hydrocarbons and diisobutene in said fixed bed acidic cation exchange resin, and (c) withdrawing said diisobutene from said distillation column reactor at a point below said feed zone.
Claim 12
Independent Claim
79 words
A method for separating isobutene from a C 4 hydrocarbon stream comprising feeding a C 4 hydrocarbon stream containing isobutene to a distillation column reactor containing a fixed bed acid cation exchange resin, contacting said C 4 stream with said resin by distillation, thereby catalytically reacting isobutene with itself to form diisobutene, removing diisobutene from the column below said fixed bed and concurrently removing a C 4 concentrate greatly reduced in isobutene from the column above said fixed bed.
Claim 13
Independent Claim
79 words
A method for separating isobutene from a C 4 hydrocarbon stream comprising feeding a C 4 hydrocarbon stream containing isobutene to a distillation column reactor containing a fixed bed acid cation exchange resin, contacting said C 4 stream with said resin by distillation, thereby catalytically reacting isobutene with itself to form diisobutene, removing diisobutene from the column below said fixed bed and concurrently removing a C 4 concentrate greatly reduced in isobutene from the column above said fixed bed.
Claim 14
Dependent Claim
22 words
The method according to claim 9 wherein said C 4 stream contains n-butenes and said C 4 concentrate is a n-butene concentrate.
Claim 15
Independent Claim
120 words
A method for separating isoolefins from a mixture containing isoolefins and normal olefins comprising: (a) feeding a water saturated mixture containing an isoolefin and the corresponding normal olefin to a distillation column reactor into a feed zone, (b) concurrently in said distillation column reactor: (1) contacting said mixture with a fixed bed acidic cation exchange resin, thereby catalytically reacting the isoolefin with itself to form a dimer, and (2) fractionating the resulting mixture of dimer and normal olefin in said fixed bed acidic cation exchange resin, (c) withdrawing the dimer from the distillation column at a point below said feed zone, and (d) withdrawing the normal olefin from the distillation column at a point above the acidic cation exchange resin.
Claim 16
Independent Claim
120 words
A method for separating isoolefins from a mixture containing isoolefins and normal olefins comprising: (a) feeding a water saturated mixture containing an isoolefin and the corresponding normal olefin to a distillation column reactor into a feed zone, (b) concurrently in said distillation column reactor: (1) contacting said mixture with a fixed bed acidic cation exchange resin, thereby catalytically reacting the isoolefin with itself to form a dimer, and (2) fractionating the resulting mixture of dimer and normal olefin in said fixed bed acidic cation exchange resin, (c) withdrawing the dimer from the distillation column at a point below said feed zone, and (d) withdrawing the normal olefin from the distillation column at a point above the acidic cation exchange resin.
Claim 17
Independent Claim
91 words
A method of preparing diisobutene comprising: (a) feeding a water saturated C 4 hydrocarbon stream containing isobutene to a distillation column reactor into a feed zone, (b) concurrently in said distillation column reactor: (1) contacting said stream with a fixed bed acid cation exchange resin, thereby catalytically reacting isobutene with itself to form diisobutene, and (2) fractionating the resulting mixture of C 4 hydrocarbons and diisobutene in said fixed bed acidic cation exchange resin, and (c) withdrawing said diisobutene from said distillation column reactor at a point below said feed zone.
Claim 18
Independent Claim
91 words
A method of preparing diisobutene comprising: (a) feeding a water saturated C 4 hydrocarbon stream containing isobutene to a distillation column reactor into a feed zone, (b) concurrently in said distillation column reactor: (1) contacting said stream with a fixed bed acid cation exchange resin, thereby catalytically reacting isobutene with itself to form diisobutene, and (2) fractionating the resulting mixture of C 4 hydrocarbons and diisobutene in said fixed bed acidic cation exchange resin, and (c) withdrawing said diisobutene from said distillation column reactor at a point below said feed zone.
Claim 19
Independent Claim
120 words
A method for separating isoolefins from a mixture containing isoolefins and normal olefins comprising: (a) feeding a substantially anhydrous mixture containing an isoolefin and the corresponding normal olefin to a distillation column reactor into a feed zone, (b) concurrently in said distillation column reactor: (1) contacting said mixture with a fixed bed acidic cation exchange resin, thereby catalytically reacting the isoolefin with itself to form a dimer, and (2) fractionating the resulting mixture of dimer and normal olefin in said fixed bed acidic cation exchange resin, (c) withdrawing the dimer from the distillation column at a point below said feed zone, and (d) withdrawing the normal olefin from the distillation column at a point above the acidic cation exchange resin.
Claim 20
Independent Claim
120 words
A method for separating isoolefins from a mixture containing isoolefins and normal olefins comprising: (a) feeding a substantially anhydrous mixture containing an isoolefin and the corresponding normal olefin to a distillation column reactor into a feed zone, (b) concurrently in said distillation column reactor: (1) contacting said mixture with a fixed bed acidic cation exchange resin, thereby catalytically reacting the isoolefin with itself to form a dimer, and (2) fractionating the resulting mixture of dimer and normal olefin in said fixed bed acidic cation exchange resin, (c) withdrawing the dimer from the distillation column at a point below said feed zone, and (d) withdrawing the normal olefin from the distillation column at a point above the acidic cation exchange resin.
Claim 21
Independent Claim
91 words
A method of preparing diisobutene comprising: (a) feeding a substantially anhydrous C 4 hydrocarbon stream containing isobutene to a distillation column reactor into a feed zone, (b) concurrently in said distillation column reactor: (1) contacting said stream with a fixed bed acid cation exchange resin, thereby catalytically reacting isobutene with itself to form diisobutene, and (2) fractionating the resulting mixture of C 4 hydrocarbons and diisobutene in said fixed bed acidic cation exchange resin, and (c) withdrawing said diisobutene from said distillation column reactor at a point below said feed zone.
Claim 22
Independent Claim
91 words
A method of preparing diisobutene comprising: (a) feeding a substantially anhydrous C 4 hydrocarbon stream containing isobutene to a distillation column reactor into a feed zone, (b) concurrently in said distillation column reactor: (1) contacting said stream with a fixed bed acid cation exchange resin, thereby catalytically reacting isobutene with itself to form diisobutene, and (2) fractionating the resulting mixture of C 4 hydrocarbons and diisobutene in said fixed bed acidic cation exchange resin, and (c) withdrawing said diisobutene from said distillation column reactor at a point below said feed zone.
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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) | 1983-12-30 | 1984-06-30 | 1984-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-12-30 | 1988-06-30 | 1988-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-12-30 | 1992-06-30 | 1992-12-30 | $7700.00 | Window Closed / Lapsed |