US4225530A
Expired / Lapsed
US
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Rhodium catalyst regeneration by carbon monoxide treatment
Assignee: Union Carbide Corp
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Filing: 1978-12-11
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Granted: 1980-09-30
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Expires: 1998-12-11
Abstract
Abstract This invention relates to the continuous production of alkane polyols by the reaction of hydrogen and CO in a homogeneous liquid phase mixture containing a rhodium carbonyl complex catalyst, the mole ratio of H2/CO in the reactant gas being above about 0.1, wherein the improvement comprises periodically lowering the H2/CO mole ratio in the reactant gas to about 0.1 or less and thereafter increasing the H2/CO mole ratio to about its former value.
Inventors
- 👤 Robert W. Beisner
- 👤 Stephen C. Winans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 16:13
CPC Classifications
B; B01; B01J; B01J31/00; B01J31/40; B01J31/4015; B01J31/4023; B01J31/4038; B01J31/4046; B01J31/16; B01J31/20; B01J31/4092; C; C07; C07C; C07C29/00; C07C29/15; C07C29/151; C07C29/1512; B01J2231/00; B01J2231/60; B01J2231/64; B01J2231/641; B01J2231/648; B01J2531/00; B01J2531/80; B01J2531/82; B01J2531/822; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/52; Y02P20/584
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
78 words
In a process for continuously producing alkane polyols by the reaction of hydrogen and carbon monoxide in a homogeneous liquid phase mixture containing a rhodium carbonyl complex catalyst, the mole ratio of H 2 /CO in the reactant gas being above about 0.1, the improvement which comprises periodically lowering the H 2 /CO mole ratio in the reactant gas to about 0.1 or less and thereafter increasing the H 2 /CO mole ratio to about its former value.
Claim 2
Dependent Claim
78 words
In a process for continuously producing alkane polyols by the reaction of hydrogen and carbon monoxide in a homogeneous liquid phase mixture containing a rhodium carbonyl complex catalyst, the mole ratio of H 2 /CO in the reactant gas being above about 0.1, the improvement which comprises periodically lowering the H 2 /CO mole ratio in the reactant gas to about 0.1 or less and thereafter increasing the H 2 /CO mole ratio to about its former value.
Claim 3
Dependent Claim
33 words
The process of claim 1 wherein in said improvement the H 2 /CO mole ratio in the reactant gas is lowered sufficiently below 0.1 such that the gas consists essentially of carbon monoxide.
Claim 4
Dependent Claim
28 words
The process of claim 1 wherein the reaction temperature of hydrogen and carbon monoxide in the liquid phase mixture is from about 100° C. to about 375° C.
References Cited (Backward Citations)
US3833634A
Cited
US4131640A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-09-30 | 1984-03-31 | 1984-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-09-30 | 1988-03-31 | 1988-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-09-30 | 1992-03-31 | 1992-09-30 | $7700.00 | Window Closed / Lapsed |