US3079304A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of processing a celluloselignin complex
Assignee: Individual
•
Filing: 1961-04-07
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Granted: 1963-02-26
•
Expires: 1981-04-07
Abstract
No abstract record available.
Inventors
- 👤 Alfred M Thomsen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 10:18
CPC Classifications
C; C13; C13K; C13K1/00; C13K1/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
221 words
THE METHOD OF PROCESSING A CELLULOSE-LIGNIN COMPLEX WHICH COMPRISES; MILLING SAID COMPLEX WITH A DILUTE FORM OF SULPHURIC ACID TO FORM A SLURRY; HEATING SAID SLURRY IN CONTINUOUS FLOW TO A TEMPERATURE CORRESPONDING TO A GAGE PRESSURE OF BETWEEN 100 AND 150 P.S.I. FOR AN APPROXIATE 15 MINUTES; SEPARATING THE SUGAR SOLUTION THUS FORMED FROM THE SOLID RESIDUE; RE-CYCLING A PORTION OF SAID SOLID RESIDUE TO THE MILLING STEP TO UNDERGO ONCE MORE THE MILLING AND HEATING OPERATION; CONVERTING THE REMAINDER OF SAID RESIDUE INTO A MIXTURE OF NITROGEN, CARBON DIOXIDE, HYDROGEN, ACETIC ACID VAPOR AND TARRY IMPURITIES, BY THE CONTROLLED ADDITION TO THE GASIFYING SOLIDS OF STEAM, AIR AND OXYGEN, THE ADDITION OF AIR AND OXYGEN, RELATIVE TO AN ANOTHER, BEING SUCH THAT THE GAS SHALL HAVE THREE TIMES AS MUCH HYDROGEN AS NITROGEN, BY VOLUME, THE TEMPERATURE DURING GASIFICATION BEING MAINTAINED AT APPROXIMATELY 1100*F.; PURIFYING THE GAS THUS FORMED FROM ACETIC ACID AND TARRY IMPURITIES BY WASHING WITH A WATER SOLUTION OF SODIUM CARBONATE; FURTHER PURIFYING SaID GAS BY THE REMOVAL OF THE RESIDENT CARBON DIOXIDE, AND RESERVING SAID SEPARATED CARBON DIOXIDE FOR LATER USE; THE RESIDUAL GAS NOW BEING A SUITABLE GAS FOR AMMONIA SYNTHESIS WITH A HYDROGEN: NITROGEN RATIO OF 3-1; CONVERTING SAID SYNTHESIS GAS INTO AMMONIA; COMMUNGLING SAID AMMONIA WITH THE RESERVED CARBON DIOXIDE IN CONVENTIONAL
Claim 2
Independent Claim
221 words
THE METHOD OF PROCESSING A CELLULOSE-LIGNIN COMPLEX WHICH COMPRISES; MILLING SAID COMPLEX WITH A DILUTE FORM OF SULPHURIC ACID TO FORM A SLURRY; HEATING SAID SLURRY IN CONTINUOUS FLOW TO A TEMPERATURE CORRESPONDING TO A GAGE PRESSURE OF BETWEEN 100 AND 150 P.S.I. FOR AN APPROXIATE 15 MINUTES; SEPARATING THE SUGAR SOLUTION THUS FORMED FROM THE SOLID RESIDUE; RE-CYCLING A PORTION OF SAID SOLID RESIDUE TO THE MILLING STEP TO UNDERGO ONCE MORE THE MILLING AND HEATING OPERATION; CONVERTING THE REMAINDER OF SAID RESIDUE INTO A MIXTURE OF NITROGEN, CARBON DIOXIDE, HYDROGEN, ACETIC ACID VAPOR AND TARRY IMPURITIES, BY THE CONTROLLED ADDITION TO THE GASIFYING SOLIDS OF STEAM, AIR AND OXYGEN, THE ADDITION OF AIR AND OXYGEN, RELATIVE TO AN ANOTHER, BEING SUCH THAT THE GAS SHALL HAVE THREE TIMES AS MUCH HYDROGEN AS NITROGEN, BY VOLUME, THE TEMPERATURE DURING GASIFICATION BEING MAINTAINED AT APPROXIMATELY 1100*F.; PURIFYING THE GAS THUS FORMED FROM ACETIC ACID AND TARRY IMPURITIES BY WASHING WITH A WATER SOLUTION OF SODIUM CARBONATE; FURTHER PURIFYING SaID GAS BY THE REMOVAL OF THE RESIDENT CARBON DIOXIDE, AND RESERVING SAID SEPARATED CARBON DIOXIDE FOR LATER USE; THE RESIDUAL GAS NOW BEING A SUITABLE GAS FOR AMMONIA SYNTHESIS WITH A HYDROGEN: NITROGEN RATIO OF 3-1; CONVERTING SAID SYNTHESIS GAS INTO AMMONIA; COMMUNGLING SAID AMMONIA WITH THE RESERVED CARBON DIOXIDE IN CONVENTIONAL
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) | 1966-02-25 | 1966-08-27 | 1967-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-02-25 | 1970-08-27 | 1971-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-02-25 | 1974-08-27 | 1975-02-26 | $7700.00 | Window Closed / Lapsed |