Patent US2739086A successfully refreshed from Google Patents.
US2739086A
Expired / Lapsed
US
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Method and apparatus for hydrolyzing cellulosic materials
Assignee: Nickey Brothers Inc
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Filing: 1952-06-14
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Granted: 1956-03-20
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Expires: 1972-06-14
Abstract
No abstract record available.
Inventors
- 👤 Lewis C Wallace
- 👤 Reavis C Sproull
- 👤 Duane L Kenaga
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 18:07
CPC Classifications
C; C07; C07D; C07D307/00; C07D307/02; C07D307/34; C07D307/38; C07D307/40; C07D307/46; C07D307/48; B; B01; B01J; B01J3/00; B01J3/02; C13; C13K; C13K1/00; C13K1/02
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
104 words
THE METHOD OF PRODUCING FURFURAL AND HEXOSES FROM CELLULOSIC MATERIALS WHICH COMPRISES THE STEPS OF, CONTINUOUSLY BRINGING TOGETHER UNDER SUPERATMOSPHERIC PRESSURE PREACIDIFIED CELLULOSIC MATERIALS IN COUNTERCURRENT FLOW WITH A HOT GASEOUS MEDIUM WHEREBY FURFURAL IS PRODUCED CONTINUOUSLY, REMOVING THE FURFURAL CONTINUOUSLY AS IT IS PRODUCED ADJACENT THE POINT THE CELLULOSIC MATERIALS ARE INTRODUCED, THEN PASSING CONTINUOUSLY THE RESIDUAL CELLULOSIC MATERIALS IN COUNTERCURRENT FLOW WITH A HYDROLYZING ACID AND STEAM WHEREBY SOLUBLE HEXOSES ARE PRODUCED, REMOVING THE SOLUBLE HEXOSES CONTINUOUSLY ADJACENT THE POINT SAID HOT GASEOUS MEDIUM IS INTRODUCED, AND REMOVING THE LIGNIN SUBSTANTIALLY CONTINUOUSLY ADJACENT THE POINT SAID HYDROLYZING ACID AND STEAM ARE INTRODUCED.
Claim 2
Independent Claim
104 words
THE METHOD OF PRODUCING FURFURAL AND HEXOSES FROM CELLULOSIC MATERIALS WHICH COMPRISES THE STEPS OF, CONTINUOUSLY BRINGING TOGETHER UNDER SUPERATMOSPHERIC PRESSURE PREACIDIFIED CELLULOSIC MATERIALS IN COUNTERCURRENT FLOW WITH A HOT GASEOUS MEDIUM WHEREBY FURFURAL IS PRODUCED CONTINUOUSLY, REMOVING THE FURFURAL CONTINUOUSLY AS IT IS PRODUCED ADJACENT THE POINT THE CELLULOSIC MATERIALS ARE INTRODUCED, THEN PASSING CONTINUOUSLY THE RESIDUAL CELLULOSIC MATERIALS IN COUNTERCURRENT FLOW WITH A HYDROLYZING ACID AND STEAM WHEREBY SOLUBLE HEXOSES ARE PRODUCED, REMOVING THE SOLUBLE HEXOSES CONTINUOUSLY ADJACENT THE POINT SAID HOT GASEOUS MEDIUM IS INTRODUCED, AND REMOVING THE LIGNIN SUBSTANTIALLY CONTINUOUSLY ADJACENT THE POINT SAID HYDROLYZING ACID AND STEAM ARE INTRODUCED.
Claim 3
Dependent Claim
158 words
APPARATUS FOR TREATING CELLULOSIC MATERIALS COMPRISING A VERTICALLY EXTENDING REACTION CHAMBER HAVING DOWNWARDLY FLARING SIDE WALLS AT THE UPPER PORTION THEREOF, THE UPPER PORTION OF SAID SIDE WALLS FORMING AN UPRIGHT FRUSTOCONICAL TOP AND THE LOWER PORTION OF SAID SIDE WALLS FORMING AN INVERTED FRUSTO-CONICAL BOTTOM, A FRUSTO-CONICAL FILTER SCREEN SECURED TO THE INNER SURFACE OF THE SIDE WALLS AND SPACED FROM SAID UPPER PORTION DEFINING THEREBETWEEN A SECOND CHAMBER, A VAPOR OFF-TAKE CONDUIT COMMUNICATING WITH SAID SECOND CHAMBER, FEED MEANS TO INTRODUCE CELLULOSIC MATERIAL CONTINUOUSLY UNDER PRESSURE ADJACENT THE TOP OF THE REACTION CHAMBER, THERE BEING PASSAGEWAYS IN SAID SIDE WALLS INTERMEDIATE SAID FILTER SCREEN AND SAID FRUSTO-CONICAL BOTTOM FOR INTRODUCING STEAM INTO SAID REACTION CHAMBER, INLET PASSAGEWAYS ADJACENT THE BOTTOM OF SAID REACTION CHAMBER FOR INTRODUCING A HYDROLYZING ACID, THERE BEING OPENINGS IN SAID SIDE WALLS SUBJACENT THE FIRST MENTIONED PASSAGEWAYS FOR REMOVING SUGAR LIQUOR, AND LIGNIN DISCHARGE MEANS ADJACENT THE BOTTOM OF THE REACTION CHAMBER.
Claim 4
Dependent Claim
158 words
APPARATUS FOR TREATING CELLULOSIC MATERIALS COMPRISING A VERTICALLY EXTENDING REACTION CHAMBER HAVING DOWNWARDLY FLARING SIDE WALLS AT THE UPPER PORTION THEREOF, THE UPPER PORTION OF SAID SIDE WALLS FORMING AN UPRIGHT FRUSTOCONICAL TOP AND THE LOWER PORTION OF SAID SIDE WALLS FORMING AN INVERTED FRUSTO-CONICAL BOTTOM, A FRUSTO-CONICAL FILTER SCREEN SECURED TO THE INNER SURFACE OF THE SIDE WALLS AND SPACED FROM SAID UPPER PORTION DEFINING THEREBETWEEN A SECOND CHAMBER, A VAPOR OFF-TAKE CONDUIT COMMUNICATING WITH SAID SECOND CHAMBER, FEED MEANS TO INTRODUCE CELLULOSIC MATERIAL CONTINUOUSLY UNDER PRESSURE ADJACENT THE TOP OF THE REACTION CHAMBER, THERE BEING PASSAGEWAYS IN SAID SIDE WALLS INTERMEDIATE SAID FILTER SCREEN AND SAID FRUSTO-CONICAL BOTTOM FOR INTRODUCING STEAM INTO SAID REACTION CHAMBER, INLET PASSAGEWAYS ADJACENT THE BOTTOM OF SAID REACTION CHAMBER FOR INTRODUCING A HYDROLYZING ACID, THERE BEING OPENINGS IN SAID SIDE WALLS SUBJACENT THE FIRST MENTIONED PASSAGEWAYS FOR REMOVING SUGAR LIQUOR, AND LIGNIN DISCHARGE MEANS ADJACENT THE BOTTOM OF THE REACTION CHAMBER.
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) | 1959-03-20 | 1959-09-19 | 1960-03-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-03-20 | 1963-09-19 | 1964-03-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-03-20 | 1967-09-19 | 1968-03-20 | $7700.00 | Window Closed / Lapsed |