Patent US3083077A successfully refreshed from Google Patents.
US3083077A
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Method for the recovery of sodium carbonate from alkali-containing spent cellulose liquors
Assignee: Billeruds AB
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Filing: 1960-05-26
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Granted: 1963-03-26
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Expires: 1980-05-26
Abstract
No abstract record available.
Inventors
- 👤 Bjorkman Anders Erik Gustaf
- 👤 Andersson Per Erik
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:28
CPC Classifications
D; D21; D21C; D21C11/00; D21C11/12; D21C11/125; Y; Y10; Y10S; Y10S423/00; Y10S423/03
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
172 words
A METHOD OF TREATING ALKALI-CONTAINING SPENT SULFITE LIQUOR FOR THE RECOVERY OF THE ALKALI METAL CONTENT THEREOF MAINLY AS ALKALI METAL CARBONATE CONTAINING NOT MORE THAN 3% OF IODINE CONSUMING SUBSTANCES AND SUITABLE FOR USE FOR THE PREPATION OF FRESH SULFITE COOKING LIQUOR WHICH COMPRISES INTRODUCING A STREAM OF HOT COMBUSTION GAS CONTAINING A LIMITED AMOUNT OF FREE OXYGEN INTO ONE END OF A REACTION CHAMBER, INTRODUCING SPENT CELLULOSE LIQUID IN A FINELY DIVIDED STATE INTO SAID STREAM OF HOT COMBUSTION GAS IN THE SAME END OF SAID REACTION CHAMBER, PASSING THE RESULTING MIXTURE THROUGH THE REACTION CHAMBER AND SEPARATING THE RESULTING SUSPENDED SOLIDS FROM THE GAS PHASE OF SAID MIXTURE, THE RESIDENCE TIME OF SAID PARTICLES IN SAID CHAMBER BEING LESS THAN 30 SECONDS, AND REGULATING THE RATIO OF HOT COMBUSTION GAS TO LIQUID, THE TEMPERATURE OF THE HOT COMBUSTION GAS, THE CONCENTRATION OF THE LIQUID AND THE PARTICLE SIZE OF SAID FINELY DIVIDED STATE OF THE LIQUOR SO THAT THE EQUALIZED TEMPERATURE IN THE REACTION CHANBER IS AT LEAST 500*C.
Claim 2
Independent Claim
172 words
A METHOD OF TREATING ALKALI-CONTAINING SPENT SULFITE LIQUOR FOR THE RECOVERY OF THE ALKALI METAL CONTENT THEREOF MAINLY AS ALKALI METAL CARBONATE CONTAINING NOT MORE THAN 3% OF IODINE CONSUMING SUBSTANCES AND SUITABLE FOR USE FOR THE PREPATION OF FRESH SULFITE COOKING LIQUOR WHICH COMPRISES INTRODUCING A STREAM OF HOT COMBUSTION GAS CONTAINING A LIMITED AMOUNT OF FREE OXYGEN INTO ONE END OF A REACTION CHAMBER, INTRODUCING SPENT CELLULOSE LIQUID IN A FINELY DIVIDED STATE INTO SAID STREAM OF HOT COMBUSTION GAS IN THE SAME END OF SAID REACTION CHAMBER, PASSING THE RESULTING MIXTURE THROUGH THE REACTION CHAMBER AND SEPARATING THE RESULTING SUSPENDED SOLIDS FROM THE GAS PHASE OF SAID MIXTURE, THE RESIDENCE TIME OF SAID PARTICLES IN SAID CHAMBER BEING LESS THAN 30 SECONDS, AND REGULATING THE RATIO OF HOT COMBUSTION GAS TO LIQUID, THE TEMPERATURE OF THE HOT COMBUSTION GAS, THE CONCENTRATION OF THE LIQUID AND THE PARTICLE SIZE OF SAID FINELY DIVIDED STATE OF THE LIQUOR SO THAT THE EQUALIZED TEMPERATURE IN THE REACTION CHANBER IS AT LEAST 500*C.
References Cited (Backward Citations)
US2261995A
Cited
US2535730A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-03-25 | 1966-09-24 | 1967-03-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-03-25 | 1970-09-24 | 1971-03-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-03-25 | 1974-09-24 | 1975-03-26 | $7700.00 | Window Closed / Lapsed |