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US4055512A
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Catalyst for producing cycloolefin and method for making the same
Assignee: Mitsubishi Chemical Corp
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Filing: 1976-07-01
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Granted: 1977-10-25
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Expires: 1996-07-01
Abstract
Abstract A catalyst for producing a cyclomonoolefin by hydrogenating an aromatic hydrocarbon of the formula: <IMAGE> wherein R1, R2 and R3 are the same or different and each represents hydrogen or C1-C3 alkyl at 100 DEG -200 DEG C under a hydrogen pressure of 5-100 atm. in an aqueous medium having a pH of 2-7 is prepared by (1) immersing a carrier into an aqueous solution containing at least one cation selected from the group consisting of sodium, potassium, magnesium, calcium, barium, zinc, manganese and iron to obtain a treated carrier, (2) supporting at least one metal selected from the group consisting of ruthenium and rhodium on said treated carrier, and (3) immersing the carrier impregnated with at least one metal selected from the group consisting of ruthenium and rhodium into an aqueous solution containing at least one cation selected from the group consisting of sodium, potassium, magnesium, calcium, barium, zinc manganese and iron.
Inventors
- 👤 Yoichi Kageyama
- 👤 Yozo Kato
- 👤 Hisao Kosugi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 20:34
CPC Classifications
B; B01; B01J; B01J37/00; B01J37/22; B01J37/24; B01J23/00; B01J23/38; B01J23/54; B01J23/56; B01J23/70; B01J23/89; C; C07; C07C; C07C5/00; C07C5/02; C07C5/10; C07C5/11; C07C2523/00; C07C2523/02; C07C2523/04; C07C2523/06; C07C2523/16; C07C2523/32; C07C2523/34; C07C2523/38; C07C2523/40; C07C2523/46; C07C2523/70; C07C2523/74; C07C2523/745; C07C2601/00; C07C2601/12; C07C2601/16
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
70 words
A catalyst for producing a cyclomonoolefin by hydrogenating an aromatic hydrocarbon of the formula: ##STR4##wherein R 1 , R 2 and R 3 are the same or different and each represents hydrogen or a C 1 - C 3 alkyl, at 100° - 200° C under a hydrogen pressure of 5 - 100 atm in an aqueous medium having a pH of 2 - 7, prepared by a process comprising:
Claim 2
Dependent Claim
70 words
A catalyst for producing a cyclomonoolefin by hydrogenating an aromatic hydrocarbon of the formula: ##STR4##wherein R 1 , R 2 and R 3 are the same or different and each represents hydrogen or a C 1 - C 3 alkyl, at 100° - 200° C under a hydrogen pressure of 5 - 100 atm in an aqueous medium having a pH of 2 - 7, prepared by a process comprising:
Claim 3
Dependent Claim
156 words
immersing a carrier into a first aqueous solution containing at least one salt whose cationic component is selected from the group consisting of sodium, potassium, magnesium, calcium, barium, zinc, manganese and iron thereby obtaining a treated carrier containing said salt and separating said salt impregnated carrier from said first aqueous solution; 2. supporting at least one ruthenium or rhodium compound on said treated carrier and reducing said compound such that ruthenium or rhodium is reduced to the metallic state; and 3. immersing the carrier supporting at least one metal selected from the group consisting of rhodium and ruthenium into a second aqueous solution containing at least one salt whose cationic component is selected from the group consisting of sodium, potassium, magnesium, calcium, barium, zinc, manganese and iron thereby obtaining a ruthenium or rhodium supported carrier which is impregnated with said salts of steps (1) and (3) and separating the resultant catalyst from said second aqueous solution.
Claim 4
Dependent Claim
156 words
immersing a carrier into a first aqueous solution containing at least one salt whose cationic component is selected from the group consisting of sodium, potassium, magnesium, calcium, barium, zinc, manganese and iron thereby obtaining a treated carrier containing said salt and separating said salt impregnated carrier from said first aqueous solution; 2. supporting at least one ruthenium or rhodium compound on said treated carrier and reducing said compound such that ruthenium or rhodium is reduced to the metallic state; and 3. immersing the carrier supporting at least one metal selected from the group consisting of rhodium and ruthenium into a second aqueous solution containing at least one salt whose cationic component is selected from the group consisting of sodium, potassium, magnesium, calcium, barium, zinc, manganese and iron thereby obtaining a ruthenium or rhodium supported carrier which is impregnated with said salts of steps (1) and (3) and separating the resultant catalyst from said second aqueous solution.
Claim 5
Dependent Claim
21 words
The catalyst of claim 1, wherein said carrier is selected from the group consisting of zeolite, silica, silica-alumina, alumina and kieselgahr.
Claim 6
Dependent Claim
20 words
The catalyst of claim 1, wherein the concentration of said cation in said aqueous solution is 0.01 - 10 mole/liter.
Claim 7
Dependent Claim
13 words
The catalyst of claim 1, wherein said carrier is treated with manganese chloride.
Claim 8
Independent Claim
73 words
A method for preparing a catalyst for hydrogenating an aromatic hydrocarbon having the formula ##STR5##wherein R 1 , R 2 and R 3 are the same or different and each represents hydrogen or a C 1 - C 3 alkyl group under hydrogen pressure of 5 - 100 atmospheres at a temperature of 100° - 200° C in an aqueous medium having a pH of 2 - 7 to a cyclomonoolefin, which comprises:
Claim 9
Independent Claim
73 words
A method for preparing a catalyst for hydrogenating an aromatic hydrocarbon having the formula ##STR5##wherein R 1 , R 2 and R 3 are the same or different and each represents hydrogen or a C 1 - C 3 alkyl group under hydrogen pressure of 5 - 100 atmospheres at a temperature of 100° - 200° C in an aqueous medium having a pH of 2 - 7 to a cyclomonoolefin, which comprises:
Claim 10
Dependent Claim
156 words
immersing a carrier into a first aqueous solution containing at least one salt whose cationic component is selected from the group consisting of sodium, potassium, magnesium, calcium, barium, zinc, manganese and iron thereby obtaining a treated carrier containing said salt and thereafter separating said salt impregnated carrier from said first aqueous solution; 2. supporting at least one ruthenium or rhodium compound on said treated carrier and reducing said compound such that ruthenium or rhodium is reduced to the metallic state; 3. immersing the carrier supporting at least one metal selected from the group consisting of ruthenium and rhodium into a second aqueous solution containing at least one salt whose cationic component is selected from the group consisting of sodium, potassium, magnesium, calcium, barium, zinc, manganese and iron thereby obtaining a ruthenium and/or rhodium supported carrier which is impregnated with said salts of steps (1) and (3) and separating the resultant catalyst from said second aqueous solution.
Claim 11
Dependent Claim
156 words
immersing a carrier into a first aqueous solution containing at least one salt whose cationic component is selected from the group consisting of sodium, potassium, magnesium, calcium, barium, zinc, manganese and iron thereby obtaining a treated carrier containing said salt and thereafter separating said salt impregnated carrier from said first aqueous solution; 2. supporting at least one ruthenium or rhodium compound on said treated carrier and reducing said compound such that ruthenium or rhodium is reduced to the metallic state; 3. immersing the carrier supporting at least one metal selected from the group consisting of ruthenium and rhodium into a second aqueous solution containing at least one salt whose cationic component is selected from the group consisting of sodium, potassium, magnesium, calcium, barium, zinc, manganese and iron thereby obtaining a ruthenium and/or rhodium supported carrier which is impregnated with said salts of steps (1) and (3) and separating the resultant catalyst from said second aqueous solution.
Claim 12
Dependent Claim
18 words
The method of claim 5, wherein said cation is present in said aqueous solution as a chloride salt.
Claim 13
Dependent Claim
20 words
The method of claim 5, wherein said treated carrier is prepared by immersion in an aqueous solution containing manganese chloride.
Claim 14
Dependent Claim
20 words
The method of claim 5, wherein the concentration of said cation in said aqueous medium is 0.01 - 10 mole/liter.
Claim 15
Dependent Claim
21 words
The process of claim 5, wherein said carrier is selected from the group consisting of zeolite, silica, silica-alumina, alumina and kieselgohr.
Claim 16
Dependent Claim
14 words
The method of claim 5, wherein said aromatic hydrocarbon is benzene, toluene or xylene.
Claim 17
Dependent Claim
25 words
The method of claim 5, wherein said carrier is immersed in an aqueous solution containing said cation at a temperature of 20° - 250° C.
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) | 1980-10-24 | 1981-04-25 | 1981-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-10-24 | 1985-04-25 | 1985-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-10-24 | 1989-04-25 | 1989-10-25 | $7700.00 | Window Closed / Lapsed |