US4008306A
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Method of recovering manganese values from a mixture obtained by catalytically oxidizing a paraffin with gaseous oxygen
Assignee: Ajinomoto Co Inc
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Filing: 1975-06-05
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Granted: 1977-02-15
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Expires: 1995-06-05
Abstract
Abstract When paraffins having a chain of 10 - 40 carbon atoms are reacted with gaseous oxygen in the presence of a manganese bearing catalyst, manganese is present in the oxidation mixture partly as a solute in the liquid mixture, and partly as a sludge. When the oxidation mixture is extracted with a dilute mineral acid, practically the entire manganese values present in the mixture are found in the aqueous extract which is free of significant amounts of organic matter. When a more concentrated aqueous acid is used in the extraction, practically the entire manganese values present are converted to a precipitate which is readily recovered and may be dissolved in water for further processing.
Inventors
- 👤 Takashi Yamashita
- 👤 Tadashi Takeshiro
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 01:23
CPC Classifications
C; C07; C07C; C07C51/00; C07C51/42; C07C51/16; C07C51/21; C07C51/215; C07C51/487
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
109 words
A method of recovering manganese values from a liquid oxidation mixture obtained by oxidizing a paraffin having 10 to 40 carbon atoms with gaseous oxygen in the presence of a manganese-bearing catalyst, said mixture essentially consisting of an organic liquid phase containing mono-basic fatty acid produced by said oxidation, unsaponifiable matter, and a portion of said manganese values as a solute, which method comprises: (a) contacting said organic liquid phase with aqueous sulfuric acid until said manganese values accumulate substantially completely in a phase distinct from said organic liquid phase; (b) separating said organic liquid phase and said distinct phase; and (c) recovering manganese values from said distinct phase.
Claim 2
Independent Claim
109 words
A method of recovering manganese values from a liquid oxidation mixture obtained by oxidizing a paraffin having 10 to 40 carbon atoms with gaseous oxygen in the presence of a manganese-bearing catalyst, said mixture essentially consisting of an organic liquid phase containing mono-basic fatty acid produced by said oxidation, unsaponifiable matter, and a portion of said manganese values as a solute, which method comprises: (a) contacting said organic liquid phase with aqueous sulfuric acid until said manganese values accumulate substantially completely in a phase distinct from said organic liquid phase; (b) separating said organic liquid phase and said distinct phase; and (c) recovering manganese values from said distinct phase.
Claim 3
Dependent Claim
57 words
A method as set forth in claim 1, wherein said aqueous sulfuric acid is at least 0.05-normal but not more than 5-normal, said aqueous sulfuric acid being contacted with said oxidation mixture in an amount stoichiometrically equivalent to 0.5 to 5 times the amount of metal in said oxidation mixture, said distinct phase being an aqueous liquid.
Claim 4
Dependent Claim
36 words
A method as set forth in claim 2, wherein said aqueous sulfuric acid is 0.1 to 3-normal, and said amount is stoichiometrically equivalent to 1.0 to 2.5 times the amount of metal in said oxidation mixture.
Claim 5
Dependent Claim
52 words
A method as set forth in claim 1, wherein said aqueous sulfuric acid is 5-normal to 36-normal sulfuric acid, said aqueous sulfuric acid being contacted with said oxidation mixture in an amount stoichiometrically equivalent to 1.0 to 3 times the amount of metal in said oxidation mixture, said distinct phase being solid.
Claim 6
Dependent Claim
33 words
A method as set forth in claim 4, wherein said aqueous sulfuric acid is 10-normal to 20-normal, and said amount is stoichiometrically equivalent to 1.5 to 2.5 times the amount of said metal.
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) | 1980-02-15 | 1980-08-16 | 1981-02-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-02-15 | 1984-08-16 | 1985-02-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-02-15 | 1988-08-16 | 1989-02-15 | $7700.00 | Window Closed / Lapsed |