EP0441260A1
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EP
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Catalytic carbonylation process
Assignee: Millennium Petrochemicals Inc
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Filing: 1991-02-01
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Granted: —
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Expires: 2011-02-01
Abstract
Abstract A process is disclosed for the carbonylation of an organic compound selected from the group consisting of an olefin, an alcohol, an acid and an ester. In this process the organic compound is reacted with carbon monoxide in the presence of a Group VIII metal-containing catalyst. The liquid carbonylation product solution of this reaction is conveyed to a separation zone maintained at a lower total pressure than is the pressure in the reaction zone. Simultaneously with the conveyance of the liquid product solution to the separation zone is the introduction therein of a carbon monoxide-containing gaseous stream, the carbon monoxide therein contributing a partial pressure of up to 30 psia to the total pressure of said separation zone. A portion of the liquid carbonylation product solution is flashed and removed from the separation zone. The unflashed liquid carbonylation product solution is recycled into the reaction zone.
Inventors
- 👤 David W. Smith
- 👤 Ronnie M. Hanes
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-02 12:25
CPC Classifications
C; C07; C07B; C07B41/00; C07B41/06; C07C; C07C51/00; C07C51/10; C07C51/14; C07C51/12; C07C67/00; C07C67/36; C07C67/38
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
123 words
A carbonylation process comprising reacting an an olefin, an alkanol, an acid or an ester, with carbon monoxide in the presence of a Group VIII metal- containing catalyst in a reaction zone wherein a liquid carbonylation product solution is obtained; conveying said liquid carbonylation product solution to a separation zone, said separation zone maintained at a pressure lower than said pressure of said reaction zone; introducing a carbon monoxide-containing gaseous stream into said separation zone simultaneously with said conveyance therein of said liquid carbonylation product solution, said carbon monoxide gas providing a partial pressure of up to about 30 psia whereby a fraction of said carbonylation product solution is flashed off; and recycling said unflashed liquid carbonylation product solution to said reaction zone.
Claim 2
Dependent Claim
31 words
A process in accordance with Claim 1 wherein said carbon monoxide-containing gaseous stream introduced into said separation zone contributes a partial pressure of between about 2 psia and about 30 psia.
Claim 3
Dependent Claim
16 words
A process in accordance with Claim 1 or 2 wherein the olefin is a C₂-C₄ olefin.
Claim 4
Dependent Claim
13 words
A process in accordance with Claim 3 wherein said C₂-C₄ olefin is ethylene.
Claim 5
Dependent Claim
16 words
A process in accordance with Claim 1 or 2 wherein said alkanol is a C₁-C₄ alkanol.
Claim 6
Dependent Claim
13 words
A process in accordance with Claim 5 wherein said C₁-C₄ alkanol is methanol.
Claim 7
Dependent Claim
18 words
A process in accordance with Claim 1 or 2 wherein said ester is a C₁-C₄ alkyl C₂-C₆ alkanoate.
Claim 8
Dependent Claim
16 words
A process in accordance with Claim 7 wherein said C₁-C₄ alkyl C₂-C₆ alkanoate is methyl acetate.
Claim 9
Dependent Claim
28 words
A process in accordance with any of Claims 1 to 8 wherein Group VIII metal of said Group VIII metal-containing catalyst is rhodium, ruthenium, palladium, nickel and cobalt.
Claim 10
Dependent Claim
30 words
A process in accordance with any of Claims 1 to 9 wherein said carbonylation reaction zone is maintained at a pressure of between about 15 psia and about 1500 psia.
Claim 11
Dependent Claim
47 words
A process in accordance with any of Claims 1 to 10 wherein said temperature in said reaction zone is in the range of between about 50°C and about 500°C and said temperature in the separation zone is in the range of between about 100°C and about 150°C.
Claim 12
Dependent Claim
100 words
A process in accordance with Claim 11 wherein said reaction zone is maintained at a pressure in the range of between about 50 psia and about 1000 psia and at a temperature in the range of between about 75°C and about 275°C; and said separation zone is maintained at a total pressure in the range of between about 15 psia and about 60 psia, of which carbon monoxide in said carbon monoxide-containing gaseous stream provides a partial pressure of between about 4 psia and about 26 psia, and a temperature in the range of between about 120°C and about 140°C.
Claim 13
Dependent Claim
34 words
A process in accordance with any of Claims 1 to 12 wherein said carbon monoxide-containing gaseous stream is introduced into said liquid carbonylation product solution by bubbling said gaseous stream through said liquid stream.
Claim 14
Dependent Claim
168 words
A process according to Claim 1 wherein a C₁ to C₄ alkanol is reacted with carbon monoxide in the presence of rhodium-containing catalyst in a reaction zone maintained at a pressure in the range of between about 100 psia and about 750 psia and a temperature in the range of between about 75°C and about 275°C whereby a liquid carbonylation product solution is obtained; introducing said liquid carbonylation product solution simultaneously with a carbon monoxide-containing gaseous stream, which is bubbled into said liquid carbonylation product solution, into a separation zone maintained at a total pressure in the range of between about 15 psia and about 60 psia, of which said carbon monoxide in said carbon monoxide-containing gaseous stream provides a partial pressure of between about 2 psia and about 30 psia, and a temperature in the range of between about 100°C and about 150°C whereby a portion of said liquid carbonylation product solution is flashed off; and recycling said unflashed liquid carbonylation product solution to said reaction zone.
Claim 15
Dependent Claim
39 words
A process in accordance with Claim 14 wherein said rhodium-containing catalyst is selected from the group consisting of rhodium metal, rhodium oxide, a rhodium halide, a rhodium carbonyl complex, a rhodium carbonyl halide, an organorhodium compound and rhodium nitrate.
Claim 16
Dependent Claim
14 words
A process in accordance with Claim 15 wherein said rhodium-containing catalyst is rhodium iodide.
Claim 17
Dependent Claim
98 words
A process in accordance with any of Claims 14 to 16 wherein said reaction zone is maintained at a pressure in the range of between about 300 psia and about 500 psia and a temperature in the range of between about 160°C and about 200°C; and said separation zone is maintained at a total pressure in the range of between about 15 psia and about 45 psia, of which said carbon monoxide contributes a partial pressure of between about 4 psia and about 28 psia, and a temperature in the range of between about 120°C and about 140°C.
Claim 18
Dependent Claim
105 words
A process in accordance with Claim 17 wherein said pressure in said reaction zone is in the range of between about 380 psia and 420 psia and said temperature in said reaction zone is in the range of between about 180°C and about 190°C; said total pressure in said separation zone is in the range of between about 25 psia and about 40 psia, of which a pressure of between about 10 psia and about 26 psia is contributed by the partial pressure of said carbon monoxide, and said temperature in said separation zone is in the range of between about 125°C and about 135°C.
Claim 19
Dependent Claim
15 words
A process in accordance with Claim 17 or 18 wherein said C₁-C₄ alkanol is methanol.
Claim 20
Dependent Claim
34 words
A process in accordance with any of Claims 14 to 19 wherein said carbon monoxide-containing gaseous stream is a gaseous mixture comprising carbon monoxide present in a concentration of more than 50% by volume.
Claim 21
Dependent Claim
21 words
A process in accordance with any of Claims 14 to 20 wherein said carbon monoxide-containing gaseous stream is neat carbon monoxide.
Claim 22
Dependent Claim
18 words
A process in accordance with Claim 20 wherein said gaseous mixture includes carbon dioxide, methane, nitrogen and hydrogen.
Claim 23
Dependent Claim
19 words
A process according to any of Claims 17 to 22 wherein the liquid carbonylation product solution contains acetic acid.
References Cited (Backward Citations)
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