Patent US4336240A successfully refreshed from Google Patents.
US4336240A
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Method of manufacturing hydrogen peroxide
Assignee: Air Products and Chemicals Inc
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Filing: 1981-04-22
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Granted: 1982-06-22
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Expires: 2001-04-22
Abstract
Abstract A process for producing hydrogen peroxide wherein a gaseous mixture comprising hydrogen and oxygen is contacted with a catalyst in the presence of water and an organic solvent wherein: (i) the organic solvent is immiscible with water and unreactive with hydrogen peroxide under the contacting conditions; (ii) the distribution coefficient for hydrogen peroxide between the water and the organic solvent is greater than 1; (iii) the catalyst is of the formula L 2 MX 2 wherein L is a ligand represented by the formula A R 1 R 2 R 3 wherein R 1 R 2 and R 3 are alkyl, cycloalkyl or aryl groups, hydrogen or halogen, A is a Group 5b element selected from the group consisting of nitrogen, phosphorous and arsenic, M is a Group 8 metal and X is halogen, said catalyst being soluble in said organic solvent and insoluble in water; and (iv) the gaseous mixture is non-ignitable under the process conditions characterized in that the organic solvent is selected from the group consisting of fluorocarbons, halofluorocarbons and mixtures thereof.
Inventors
- 👤 Fred Moseley
- 👤 Paul N. Dyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 14:33
CPC Classifications
C; C01; C01B; C01B15/00; C01B15/01; C01B15/029
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
177 words
A process for producing hydrogen peroxide wherein a gaseous mixture comprising hydrogen and oxygen is contacted with a catalyst in the presence of water and an organic solvent wherein: (i) the organic solvent is immiscible with water and unreactive with hydrogen peroxide under the contacting conditions; (ii) the distribution coefficient for hydrogen peroxide between the water and the organic solvent is greater than 1; (iii) the catalyst is of the formula L 2 MX 2 wherein L is a ligand represented by the formula A R 1 R 2 R 3 wherein R 1 R 2 and R 3 are alkyl, cycloalkyl or aryl groups, hydrogen or halogen, A is a Group 5b element selected from the group consisting of nitrogen, phosphorous and arsenic, M is a Group 8 metal and X is halogen, said catalyst being soluble in said organic solvent and insoluble in water; and (iv) the gaseous mixture is non-ignitable under the process conditions the improvement comprised in that the organic solvent is selected from the group consisting of fluorocarbons, halofluorocarbons and mixtures thereof.
Claim 2
Dependent Claim
177 words
A process for producing hydrogen peroxide wherein a gaseous mixture comprising hydrogen and oxygen is contacted with a catalyst in the presence of water and an organic solvent wherein: (i) the organic solvent is immiscible with water and unreactive with hydrogen peroxide under the contacting conditions; (ii) the distribution coefficient for hydrogen peroxide between the water and the organic solvent is greater than 1; (iii) the catalyst is of the formula L 2 MX 2 wherein L is a ligand represented by the formula A R 1 R 2 R 3 wherein R 1 R 2 and R 3 are alkyl, cycloalkyl or aryl groups, hydrogen or halogen, A is a Group 5b element selected from the group consisting of nitrogen, phosphorous and arsenic, M is a Group 8 metal and X is halogen, said catalyst being soluble in said organic solvent and insoluble in water; and (iv) the gaseous mixture is non-ignitable under the process conditions the improvement comprised in that the organic solvent is selected from the group consisting of fluorocarbons, halofluorocarbons and mixtures thereof.
Claim 3
Dependent Claim
24 words
A process according to claim 1, wherein the halofluorocarbon is fully substituted by halogens with at least 25% of the halogen atoms being fluorine.
Claim 4
Dependent Claim
22 words
A process according to claim 2, wherein the halofluorocarbon is selected from the group consisting of 1,1,2-trichlorotrifluoroethane, 1,2-dichlorotetrafluoroethane, 1,2-dibromotetrafluoroethane and mixtures thereof.
Claim 5
Dependent Claim
11 words
A process according to claim 1, wherein the fluorocarbon is perfluorinated.
Claim 6
Dependent Claim
26 words
A process according to claim 4, wherein the fluorocarbon is selected from the group consisting of perfluoroaliphatic ethers, perfluoroalkyl tertiary amines, perfluoropentane, perfluoro-1,3-dimethylcyclohexane and mixtures thereof.
Claim 7
Dependent Claim
24 words
A process according to claim 1, wherein the phase volume ratio of water to halofluorocarbon and/or perfluorocarbon is in the range 10:1 to 1:10.
Claim 8
Dependent Claim
16 words
A process according to claim 6, wherein said ratio is in the range 2:1 to 1:3.
Claim 9
Dependent Claim
13 words
A process according to claim 1, wherein the fluorocarbon and/or halofluorocarbon is aliphatic.
Claim 10
Dependent Claim
79 words
A process according to claim 1, wherein the organic solvent comprises a halofluorocarbon and an additive selected from the group consisting of: (i) 1 to 50,000 ppm by volume perfluorocarbon; (ii) polymeric halofluorocarbon of molecular weight greater than 300 g; (iii) up to 50 ppm by weight of a C 10 -C 30 straight chain hydrocarbon, hydrocarbon salt, carboxylic acid, ester of a carboxylic acid or salt of a carboxylic acid or a fluorinated equivalent thereof; and mixtures thereof.
Claim 11
Dependent Claim
26 words
A process according to claim 1, wherein the catalyst is selected from the group consisting of bis(tri(pentafluorophenyl)phosphine) palladium dichloride, bis(tricyclohexylphosphine) palladium dichloride and bis(triphenylarsine) palladium dichloride.
References Cited (Backward Citations)
US4128627A
Cited
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1985-06-21 | 1985-12-21 | 1986-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-06-21 | 1989-12-21 | 1990-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-06-21 | 1993-12-21 | 1994-06-22 | $7700.00 | Window Closed / Lapsed |