Patent US3789114A successfully refreshed from Google Patents.
US3789114A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the production of hydrogen peroxide by the anthraquinone process
Assignee: DEUTSCHE GOLD SILBER SCHEIDEANSTALT DT
•
Filing: 1972-01-27
•
Granted: 1974-01-29
•
Expires: 1992-01-27
Abstract
Abstract Hydrogen peroxide is produced by the anthraquinone process employing a stabile 1, 3, 5-triazine as the solvent for the reaction carrier.
Inventors
- 👤 G Giesselmann
- 👤 G Schreyer
- 👤 W Weigert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 05:17
CPC Classifications
C; C01; C01B; C01B15/00; C01B15/01; C01B15/022; C01B15/023
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
13 words
The process according to claim 1, wherein the triazine is the sole solvent.
Claim 2
Dependent Claim
16 words
The process according to claim 1, including another solvent for said anthraquinone or the hydrogenated anthraquinone.
Claim 3
Dependent Claim
19 words
The process according to claim 1, wherein R1 and R2 are alkyl groups of one to two carbon atoms.
Claim 4
Dependent Claim
20 words
The process according to claim 4, wherein R1 and R2 are both methyl and R3 and R4 are both ethyl.
Claim 5
Dependent Claim
45 words
The process according to claim 1, wherein another quinone or hydroquinone solvent is included having a density of below 0.98 at 20* C., said other solvent being present in an amount sufficient to lower the density of the solution to below 0.98 at 20* C.
Claim 6
Dependent Claim
20 words
The process according to claim 6, wherein R1, R2, R3 and R4 are alkyls of one to two carbon atoms.
Claim 7
Dependent Claim
34 words
The process according to claim 6, wherein said other solvent is a polyalkyl benzene, t-butyl benzene, a tertiary phosphate ester, a secondary phosphonate ester, a higher alcohol, a ketone or a carboxylic acid ester.
Claim 8
Dependent Claim
49 words
The process according to claim 8, wherein the other solvent is a mixture of polyalkylbenzenes, t-butyl benzene, t-butyl toluene, trimethyl benzene, a trialkyl phosphate, a dialkyl phosphonate, diisobutyl carbinol, diisobutyl ketone or methyl cyclohexyl acetate and R1, R2, R3 and R4 are alkyls of one to two carbon atoms.
Claim 9
Dependent Claim
14 words
The process according to claim 1, wherein an antioxidant is added to the solution.
Claim 10
Dependent Claim
13 words
The process according to claim 10, wherein the antioxidant is a phenolic antioxidant.
Claim 11
Dependent Claim
44 words
The process according to claim 11, wherein R1, R2, R3, and R4 are alkyls of one to two carbon atoms and the antioxidant is present in an amount of 0.1 to 1 percent of the solution and is a sterically hindered phenol or naphthol.
Claim 12
Dependent Claim
15 words
The process according to claim 12, wherein the antioxidant is 2,6-di-t-butyl phenol or 2,6-di-t-butyl-4-methyl phenol.
Claim 13
Dependent Claim
31 words
A composition consisting essentially of an alkyl substituted anthraquinone or alkyl substituted hydrogenated anthraquinone in a solvent comprising at least 15 percent by volume of a liquid triazine of the formula
Claim 14
Dependent Claim
20 words
A composition according to claim 14, wherein R1, R2, R3 and R4 are alkyls of one to two carbon atoms.
Claim 15
Dependent Claim
14 words
The composition according to claim 14, wherein the triazine is the sole solvent present.
Claim 16
Dependent Claim
20 words
The composition according to claim 15, wherein R1 and R2 are both methyl and R3 and R4 are both ethyl.
Claim 17
Dependent Claim
49 words
The composition according to claim 15, comprising the presence of an additional solvent for the anthraquinone or anthrahydroquinone, said additional solvent having a density below 0.98 at 20* C. and being present in an amount sufficient to lower the density of the solution to below 0.98 at 20* C.
Claim 18
Dependent Claim
21 words
The composition according to claim 18, wherein there is present a phenolic antioxidant in an amount sufficient to stabilize the triazine.
Claim 19
Dependent Claim
46 words
In a process for the production of hydrogen peroxide by the anthraquinone process in which a substituted anthraquinone thraquinone as the reaction carrier dissolved in a solvent is alternately reduced and oxidized, the improvement comprising employing as the solvent a stable, liquid triazine having the formula
Claim 20
Dependent Claim
31 words
A composition consisting essentially of an alkyl substituted anthraquinone or alkyl substituted hydrogenated anthraquinone in a solvent comprising at least 15 percent by volume of a liquid triazine of the formula
Claim 21
Dependent Claim
31 words
The composition according to claim 21 wherein R1, R2, R3 and R4 are alkyls of one to two carbon atoms and the solvent has a density below 0.98 at 20* 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) | 1977-01-28 | 1977-07-30 | 1978-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-28 | 1981-07-30 | 1982-01-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-28 | 1985-07-30 | 1986-01-29 | $7700.00 | Window Closed / Lapsed |