US4128627A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Synthesis of hydrogen peroxide
Assignee: Air Products and Chemicals Inc
•
Filing: 1977-03-04
•
Granted: 1978-12-05
•
Expires: 1997-03-04
Abstract
Abstract Hydrogen peroxide is synthesized by reacting hydrogen and oxygen in a two phase mixture of water and an organic. The mixture contains a catalyst which is insoluble in water but dissolves in the organic. The hydrogen peroxide is extracted in the water. The catalyst is L 2 MX 2 where: L is a ligand containing a Group 5b element (preferably phosphorous); M is a Group 8 metal (preferably palladium); and X is a halogen (preferably chlorine).
Inventors
- 👤 Paul N. Dyer
- 👤 Fred Moseley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 08:15
CPC Classifications
C; C01; C01B; C01B15/00; C01B15/01; C01B15/029; B; B01; B01J; B01J31/00; B01J31/16; B01J31/18; B01J31/1895; B01J31/24; B01J31/2404; B01J2531/00; B01J2531/80; B01J2531/82; B01J2531/824
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
171 words
In a process for producing hydrogen peroxide wherein a gaseous mixture comprising hydrogen and oxygen are contacted with a catalyst in the presence of water and an organic solvent, the improvement for reducing the risk of danger to explosion in said process which comprises: employing an organic solvent which is immiscible with water and unreactive with hydrogen peroxide under the contacting conditions, and the distribution coefficient for hydrogen peroxide between water and said organic solvent is greater than one; employing a catalyst of the formula L 2 MX 2 wherein L is a ligand represented by the formula AR 1 R 2 R 3 wherein R 1 R 2 and R 3 are alkyl, cycloalkyl or aryl groups, hydrogen and halogen, and A is a Group 5b element selected from the group consisting of nitrogen, phosphorus and arsenic, M is Group 8 metal and X is halogen, said catalyst being soluble in said organic solvent and insoluble in water; and employing a gaseous mixture which is nonignitable under the process conditions.
Claim 2
Dependent Claim
171 words
In a process for producing hydrogen peroxide wherein a gaseous mixture comprising hydrogen and oxygen are contacted with a catalyst in the presence of water and an organic solvent, the improvement for reducing the risk of danger to explosion in said process which comprises: employing an organic solvent which is immiscible with water and unreactive with hydrogen peroxide under the contacting conditions, and the distribution coefficient for hydrogen peroxide between water and said organic solvent is greater than one; employing a catalyst of the formula L 2 MX 2 wherein L is a ligand represented by the formula AR 1 R 2 R 3 wherein R 1 R 2 and R 3 are alkyl, cycloalkyl or aryl groups, hydrogen and halogen, and A is a Group 5b element selected from the group consisting of nitrogen, phosphorus and arsenic, M is Group 8 metal and X is halogen, said catalyst being soluble in said organic solvent and insoluble in water; and employing a gaseous mixture which is nonignitable under the process conditions.
Claim 3
Dependent Claim
22 words
The method according to claim 1, wherein said ligand L is selected from the group consisting of tri(pentafluorophenyl) phosphine, tricyclohexylphosphine and triphenylarsine.
Claim 4
Dependent Claim
26 words
The method according to claim 1, wherein said catayst is selected from the group consisting of bis(tri(pentafluorophenyl)phosphine) palladium dichloride, bis(tricyclohexylphosphine) palladium dichloride and bis(triphenylarsine) palladium dichloride.
Claim 5
Dependent Claim
22 words
The process of claim 1 wherein said gaseous mixture comprises oxygen, hydrogen, and a gas which is inert under the reaction conditions.
Claim 6
Dependent Claim
10 words
The process of claim 4 wherein said gas is nitrogen.
Claim 7
Dependent Claim
13 words
The method according to claim 1, wherein said Group 8 metal is palladium.
Claim 8
Dependent Claim
11 words
The method according to claim 1, wherein said halogen is chlorine.
Claim 9
Dependent Claim
33 words
The process of claim 1 wherein said gaseous mixture consists of oxygen and hydrogen and the ratio of oxygen to hydrogen does not exceed four parts oxygen per 100 parts hydrogen by volume.
Claim 10
Dependent Claim
20 words
The process of claim 1 wherein said organic solvent is selected from the group consisting of toluene, chlorobenzene and dichlorobenzene.
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) | 1981-12-04 | 1982-06-05 | 1982-12-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-12-04 | 1986-06-05 | 1986-12-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-12-04 | 1990-06-05 | 1990-12-05 | $7700.00 | Window Closed / Lapsed |