Patent US3887537A successfully refreshed from Google Patents.
US3887537A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for recovering fatty acids and/or rosin acids
Assignee: JSR Corp
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Filing: 1974-09-06
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Granted: 1975-06-03
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Expires: 1994-09-06
Abstract
Abstract A process for recovering fatty acids and/or rosin acids which comprises the steps of saponifying a tall oil head and/or pitch, introducing the saponified material into a thin film evaporator equipped with a rake and having a clearance of not more than one millimeter between the blade tips and the surrounding tube wall, evaporating and removing the low-boiling matter including unsaponifiables by a treatment at a temperature not lower than the melting point of the resulting soaps, and thereafter decomposing the saponification products.
Inventors
- 👤 Tetsuya Harada
- 👤 Tsunemasa Yumoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 22:46
CPC Classifications
C; C11; C11B; C11B13/00; C11B13/005; C07; C07C; C07C51/00; C07C51/42; C07C51/43; C07C51/44; Y; Y02; Y02W; Y02W30/00; Y02W30/50; Y02W30/74
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
83 words
A process for recovering fatty acids and/or rosin acids which comprises the steps of saponifying a tall oil head and/or pitch, introducing the saponified material into a thin film evaporator equipped with a rake and having a clearance of not more than one millimeter between the blade tips and the surrounding tube wall, evaporating and removing the low-boiling matter including unsaponifiables by a treatment at a temperature not lower than the melting point of the resulting soaps, and thereafter decomposing the saponification products.
Claim 2
Dependent Claim
83 words
A process for recovering fatty acids and/or rosin acids which comprises the steps of saponifying a tall oil head and/or pitch, introducing the saponified material into a thin film evaporator equipped with a rake and having a clearance of not more than one millimeter between the blade tips and the surrounding tube wall, evaporating and removing the low-boiling matter including unsaponifiables by a treatment at a temperature not lower than the melting point of the resulting soaps, and thereafter decomposing the saponification products.
Claim 3
Dependent Claim
83 words
A PROCESS FOR RECOVERING FATTY ACIDS AND/OR ROSIN ACIDS WHICH COMPRISES THE STEPS OF SAPONIFYING A TALL OIL HEAD AND/OR PITCH, INTRODUCING THE SAPONIFIED MATERIAL INTO A THIN FILM EVAPORATOR EQUIPPED WITH A RAKE AND HAVING A CLEARANCE OF NOT MORE THAN ONE MILLIMETER BETWEEN THE BLADE TIPS AND THE SURROUNDING TUBE WALL, EVAPORATING AND REMOVING THE LOWBOILING MATTER INCLUDING UNSAPONIFIABLES BY A TREATMENT AT A TEMPERATURE NOT LOWER THAN THE MELTING POINT OF THE RESULTING SOAPS, AND THEREAFTER DECOMPOSING THE SAPONIFICATION PRODUCTS.
Claim 4
Dependent Claim
83 words
A PROCESS FOR RECOVERING FATTY ACIDS AND/OR ROSIN ACIDS WHICH COMPRISES THE STEPS OF SAPONIFYING A TALL OIL HEAD AND/OR PITCH, INTRODUCING THE SAPONIFIED MATERIAL INTO A THIN FILM EVAPORATOR EQUIPPED WITH A RAKE AND HAVING A CLEARANCE OF NOT MORE THAN ONE MILLIMETER BETWEEN THE BLADE TIPS AND THE SURROUNDING TUBE WALL, EVAPORATING AND REMOVING THE LOWBOILING MATTER INCLUDING UNSAPONIFIABLES BY A TREATMENT AT A TEMPERATURE NOT LOWER THAN THE MELTING POINT OF THE RESULTING SOAPS, AND THEREAFTER DECOMPOSING THE SAPONIFICATION PRODUCTS.
Claim 5
Dependent Claim
25 words
A process according to claim 1, wherein the rake type thin film evaporator has a blade tip-wall clearance of from substantially zero to 0.8 mm.
Claim 6
Dependent Claim
42 words
A process according to claim 1, wherein the soaps are treated in the rake type thin film evaporator under reduced pressure and at a temperature between the melting point of the soaps and a temperature higher than the melting point by 50*C.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-06-02 | 1978-12-02 | 1979-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-02 | 1982-12-02 | 1983-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-02 | 1986-12-02 | 1987-06-03 | $7700.00 | Window Closed / Lapsed |