US4258215A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydroformylation process
Assignee: Eastman Chemical Co
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Filing: 1979-08-29
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Granted: 1981-03-24
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Expires: 1999-08-29
Abstract
Abstract An improved method for the preparation of aldehydes by the hydroformylation of an alpha-olefin, carbon monoxide and hydrogen in the presence of a rhodium complex catalyst at a pressure of about 1,000 psig and in the presence of from about 1% to about 10% of water.
Inventors
- 👤 John L. Dawes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 19:36
CPC Classifications
C; C07; C07C; C07C45/00; C07C45/49; C07C45/50
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
145 words
In a process for the hydroformylation of olefins to produce aldehydes which comprises contacting an alpha-olefin having up to about 20 carbon atoms with carbon monoxide and hydrogen in the presence of a catalytic quantity of a complex catalyst consisting essentially of rhodium in combination with carbon monoxide and a triorganophosphorus ligand selected from the group consisting of trialkylphosphines, tricycloalkylphosphines, triarylphosphites and triarylphosphines wherein there is present at least two moles of said ligand per mole of rhodium at a temperature of from about 90° C. to about 160° C. the improvement wherein the reactor feed is a two-phase system consisting of an aqueous phase and an organic phase comprising said alpha-olefin, complex catalyst and ligand and the reaction takes place at a pressure of from about 500 psig to about 3000 psig in the presence of from about 0.1 to about 10% of water.
Claim 2
Dependent Claim
145 words
In a process for the hydroformylation of olefins to produce aldehydes which comprises contacting an alpha-olefin having up to about 20 carbon atoms with carbon monoxide and hydrogen in the presence of a catalytic quantity of a complex catalyst consisting essentially of rhodium in combination with carbon monoxide and a triorganophosphorus ligand selected from the group consisting of trialkylphosphines, tricycloalkylphosphines, triarylphosphites and triarylphosphines wherein there is present at least two moles of said ligand per mole of rhodium at a temperature of from about 90° C. to about 160° C. the improvement wherein the reactor feed is a two-phase system consisting of an aqueous phase and an organic phase comprising said alpha-olefin, complex catalyst and ligand and the reaction takes place at a pressure of from about 500 psig to about 3000 psig in the presence of from about 0.1 to about 10% of water.
Claim 3
Dependent Claim
21 words
A process according to claim 1 wherein the temperature of the reaction is from about 100° C. to about 140° C.
Claim 4
Dependent Claim
17 words
A process of claim 1 wherein the pressure is from about 900 psig to about 1100 psig.
Claim 5
Dependent Claim
17 words
A process of claim 1 wherein the pressure is from about 750 psig to about 1500 psig.
Claim 6
Dependent Claim
34 words
A process of claim 1 wherein the catalyst is present in the extent of from about 1 part per million to about 1000 parts per million based on the rhodium content of the catalyst.
Claim 7
Dependent Claim
19 words
A process of claim 5 wherein the catalyst is present from about 10 to about 100 parts per million.
Claim 8
Dependent Claim
45 words
A process according to claim 1 wherein the effluent from the reactor is separated into a product stream and a catalyst containing stream which catalyst containing stream is subsequently regenerated by stripping with a hot gas at a temperature of less than about 160° C.
Claim 9
Dependent Claim
20 words
A process according to claim 7 wherein the stripping is accomplished at a temperature of less than about 110° C.
Claim 10
Dependent Claim
28 words
A process according to claim 7 wherein the stripping gas is selected from the group consisting of nitrogen, alpha-olefins, synthesis gas or gases recovered from the reactor effluent.
Claim 11
Dependent Claim
27 words
A process according to claim 9 wherein the stripped catalyst containing stream is adjusted to the desired rhodium concentration with an aldehyde and recycled to the reactor.
Claim 12
Dependent Claim
28 words
A process according to claim 8 wherein the stripping gas is selected from the group consisting of nitrogen, alpha-olefins, synthesis gas or gases recovered from the reactor effluent.
Claim 13
Dependent Claim
27 words
A process according to claim 11 wherein the stripped catalyst containing stream is adjusted to the desired rhodium concentration with an aldehyde and recycled to the reactor.
Claim 14
Dependent Claim
22 words
A process according to claim 9 wherein the stripping gas is selected from the group consisting of ethylene, propylene, butene-1, and isobutylene.
Claim 15
Dependent Claim
27 words
A process according to claim 13 wherein the stripped catalyst containing stream is adjusted to the desired rhodium concentration with an aldehyde and recycled to the reactor.
Claim 16
Dependent Claim
22 words
A process according to claim 11 wherein the stripping gas is selected from the group consisting of ethylene, propylene, butene-1, and isobutylene.
Claim 17
Dependent Claim
27 words
A process according to claim 15 wherein the stripped catalyst containing stream is adjusted to the desired rhodium concentration with an aldehyde and recycled to the reactor.
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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) | 1984-03-23 | 1984-09-22 | 1985-03-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-03-23 | 1988-09-22 | 1989-03-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-03-23 | 1992-09-22 | 1993-03-24 | $7700.00 | Window Closed / Lapsed |