US4277632A
Expired / Lapsed
US
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Process for the production of alkylene glycols
Assignee: Nippon Shokubai Co Ltd
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Filing: 1979-09-19
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Granted: 1981-07-07
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Expires: 1999-09-19
Abstract
Abstract A process for the production of alkylene glycols, which comprises causing a corresponding alkylene oxide to react with water in the presence of a catalyst of at least one member selected from the group consisting of molybdenum and tungsten.
Inventors
- 👤 Toshihiko Kumazawa
- 👤 Takeshi Yamamoto
- 👤 Hiroshi Odanaka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 11:36
CPC Classifications
C; C07; C07C; C07C29/00; C07C29/09; C07C29/10; C07C29/103; C07C29/106; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/52
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
117 words
A process for the production of substituted or unsubstituted ethylene glycols, which comprises causing a corresponding ethylene oxide of the formula ##STR3## wherein R 1 , R 2 , R 3 , and R 4 each denote a hydrogen atom, an alkyl group having 1 to 3 carbon atoms, an aryl group having 6 carbon atoms, an alkenyl group having 2 or 3 carbon atoms or a cycloalkyl group having 3 to 6 carbon atoms to react with water in the presence of a catalyst of at least one member selected from the group consisting of metallic molybdenum, metallic tungsten, molybdenum compounds and tungstic acid and the salts thereof in an atmosphere of nitrogen or carbon dioxide.
Claim 2
Dependent Claim
117 words
A process for the production of substituted or unsubstituted ethylene glycols, which comprises causing a corresponding ethylene oxide of the formula ##STR3## wherein R 1 , R 2 , R 3 , and R 4 each denote a hydrogen atom, an alkyl group having 1 to 3 carbon atoms, an aryl group having 6 carbon atoms, an alkenyl group having 2 or 3 carbon atoms or a cycloalkyl group having 3 to 6 carbon atoms to react with water in the presence of a catalyst of at least one member selected from the group consisting of metallic molybdenum, metallic tungsten, molybdenum compounds and tungstic acid and the salts thereof in an atmosphere of nitrogen or carbon dioxide.
Claim 3
Dependent Claim
24 words
A process according to claim 1, wherein the amount of the catalyst is not less than 0.01% by weight based on the ethylene oxide.
Claim 4
Dependent Claim
28 words
A process according to claim 2, wherein the amount of the catalyst is in the range of from 0.1 to 100% by weight based on the ethylene oxide.
Claim 5
Dependent Claim
28 words
A process according to claim 3, wherein the amount of the catalyst is in the range of from 1 to 20% by weight based on the ethylene oxide.
Claim 6
Dependent Claim
24 words
A process according to claim 1, wherein the reaction is carried out at a temperature in the range of from 20° to 250° C.
Claim 7
Dependent Claim
24 words
A process according to claim 5, wherein the reaction is carried out at a temperature in the range of from 50° to 200° C.
Claim 8
Dependent Claim
27 words
A process according to claim 1, wherein the alkylene oxide is one member selected from the group consisting of ethylene oxides having 2 to 4 carbon atoms.
Claim 9
Dependent Claim
12 words
A process according to claim 1, therein the catalyst is metallic molybdenum.
Claim 10
Dependent Claim
13 words
A process according to claim 1, wherein the catalyst is a molybdenum compound.
Claim 11
Dependent Claim
17 words
A process according to claim 9, wherein the molybdenum compound is molybdic acid or a salt thereof.
Claim 12
Dependent Claim
17 words
A process according to claim 10, wherein the salt of molybdic acid is an alkali metal salt.
Claim 13
Dependent Claim
12 words
A process according to claim 1, wherein the catalyst is metallic tungsten.
Claim 14
Dependent Claim
16 words
A process according to claim 7 wherein the ethylene oxide is ethylene oxide or propylene oxide.
Claim 15
Dependent Claim
16 words
A process according to claim 1, wherein the catalyst is tungstic acid or a salt thereof.
Claim 16
Dependent Claim
17 words
A process according to claim 14, wherein the salt of tungstic acid is an alkali metal salt.
Claim 17
Dependent Claim
22 words
A process according to claim 1, wherein the amount of water is 1 to 30 mols per mol of the ethylene oxide.
Claim 18
Dependent Claim
22 words
A process according to claim 16, wherein the amount of water is 1 to 20 mols per mol of the ethylene oxide.
Claim 19
Dependent Claim
18 words
A process according to claim 1, wherein the reaction is carried out in the presence of carbon dioxide.
Claim 20
Dependent Claim
23 words
A process according to claim 18, wherein the amount of carbon dioxide is 0.00001 to 1 mol per mol of the ethylene oxide.
Claim 21
Dependent Claim
23 words
A process according to claim 19, wherein the amount of carbon dioxide is 0.001 to 1 mol per mol of the ethylene oxide.
Claim 22
Dependent Claim
22 words
A process according to claim 18, wherein the amount of water is 1.01 to 5 mols per mol of the ethylene oxide.
Claim 23
Dependent Claim
22 words
A process according to claim 1, wherein the reactant solution has a pH value in the range of from 5 to 10.
Claim 24
Dependent Claim
22 words
A process according to claim 22, wherein the amount of water is 1.01 to 5 mols per mol of the alkylene oxide.
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) | 1984-07-06 | 1985-01-05 | 1985-07-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-07-06 | 1989-01-05 | 1989-07-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-07-06 | 1993-01-05 | 1993-07-07 | $7700.00 | Window Closed / Lapsed |