Patent US3929920A successfully refreshed from Google Patents.
US3929920A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for continuous fluorination of carbon
Assignee: Daikin Industries Ltd
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Filing: 1974-05-30
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Granted: 1975-12-30
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Expires: 1994-05-30
Abstract
Abstract A reactor suitable for continuous fluorination of carbon materials having a plurality of trays and a wiper provided over the each tray which serves as both means for leveling the carbon material on the tray and means for wiping off the carbon material on the tray to another tray positioned just downward, and a process for continuous fluorination of carbon materials by employing the reactor. By employing the reactor, the production capacity per bed area of reactor is widely increased and the reaction heat is readily eliminated to avoid the degradation or combustion of polycarbonmonofluoride.
Inventors
- 👤 Tetsuya Komo
- 👤 Satoshi Mizobata
- 👤 Rokuo Ukaji
- 👤 Tutomu Kamihigoshi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:22
CPC Classifications
C; C01; C01B; C01B32/00; C01B32/10
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
183 words
A PROCESS FOR THE CONTINUOUS FLUORINATION OF CARBON MATERIALS IN A VERTICAL REACTOR, SAID REACTOR HAVING A TOP AND BOTTOM COVER, FEED AND EXHAUST PORTS IN THE TOP COVER AND FEED AND EXHAUST PORTS IN THE BOTTOM PORTION OF THE REACTOR AND A PLURALITY OF HORIZONTAL TRAYS VETICALLY SPACED ALONG THE INTERNAL SURFACE OF THE REACTOR, WHICH COMPRISES THE STEPS OF: A. INTRODUCING CONTINUOUSLY A CARBON MATERIAL BEING SELECTED FROM THE GROUP CONSISTING OF CARBON BLACK, COKE, PITCH COKE, CHARCOAL, ARTIFICIAL GRAPHITE AND NATURAL GRAPHITE, B. DISTRIBUTING THE CARBON MATERIAL ONTO EACH OF THE TRAYS AND FORMING A THIN LAYER THEREON, C. INTRODUCING A FLUORINE GAS OR A MIXTURE OF FLUORINE GAS AND DILUENT CONTINUOUSLY INTO THE BOTTOM PART OF THE REACTOR, D. REACTING THE CARBON MATERIAL ON EACH OF THE TRAYS WITH THE GAS AT ELEVATED TEMPERATURE IN THE RANGE FROM 250* TO 600*C, E. TRANSFERRING THE CARBON MATERIAL SIMULATANEOUSLY FROM EACH OF THE TRAYS TO THE TRAY BELOW WHILE CONTINUING THE REACTION, AND F. REMOVING THE FLUORINEATED CARBON MATERIAL CONTINUOUSLY THROUGH AN EXHAUST PORT IN THE BOTTOM PORTION OF THE REACTOR.
Claim 2
Dependent Claim
183 words
A PROCESS FOR THE CONTINUOUS FLUORINATION OF CARBON MATERIALS IN A VERTICAL REACTOR, SAID REACTOR HAVING A TOP AND BOTTOM COVER, FEED AND EXHAUST PORTS IN THE TOP COVER AND FEED AND EXHAUST PORTS IN THE BOTTOM PORTION OF THE REACTOR AND A PLURALITY OF HORIZONTAL TRAYS VETICALLY SPACED ALONG THE INTERNAL SURFACE OF THE REACTOR, WHICH COMPRISES THE STEPS OF: A. INTRODUCING CONTINUOUSLY A CARBON MATERIAL BEING SELECTED FROM THE GROUP CONSISTING OF CARBON BLACK, COKE, PITCH COKE, CHARCOAL, ARTIFICIAL GRAPHITE AND NATURAL GRAPHITE, B. DISTRIBUTING THE CARBON MATERIAL ONTO EACH OF THE TRAYS AND FORMING A THIN LAYER THEREON, C. INTRODUCING A FLUORINE GAS OR A MIXTURE OF FLUORINE GAS AND DILUENT CONTINUOUSLY INTO THE BOTTOM PART OF THE REACTOR, D. REACTING THE CARBON MATERIAL ON EACH OF THE TRAYS WITH THE GAS AT ELEVATED TEMPERATURE IN THE RANGE FROM 250* TO 600*C, E. TRANSFERRING THE CARBON MATERIAL SIMULATANEOUSLY FROM EACH OF THE TRAYS TO THE TRAY BELOW WHILE CONTINUING THE REACTION, AND F. REMOVING THE FLUORINEATED CARBON MATERIAL CONTINUOUSLY THROUGH AN EXHAUST PORT IN THE BOTTOM PORTION OF THE REACTOR.
Claim 3
Dependent Claim
14 words
The process of claim 1, wherein said fluorination temperature is from 300* to 500*C.
Claim 4
Dependent Claim
23 words
The process of claim 1, wherein said fluorination is carried out under a partial pressure of said fluorine gas from 0.01 to 0.5.
Claim 5
Dependent Claim
14 words
The process of claim 3, wherein said partial pressure is from 0.1 to 0.4.
Claim 6
Dependent Claim
23 words
The process of claim 1, wherein said gas mixture of fluorine gas and diluent has a flow rate from 1 to 50 cm./sec.
Claim 7
Dependent Claim
18 words
The process of claim 1, wherein the carbon material on each tray is leveled into a proper thickness.
Claim 8
Dependent Claim
14 words
The process of claim 6, wherein said thickness is from 1 to 20 mm.
Claim 9
Dependent Claim
14 words
The process of claim 6, wherein said thickness is from 1 to 5 mm.
Claim 10
Dependent Claim
25 words
The process of claim 1, wherein said carbon material is a powdery carbon having an average particle size of not more than 50 Mu .
Claim 11
Dependent Claim
27 words
The process of claim 1, wherein said diluent is selected from the group consisting of nitrogen, air, perfluorocarbon of C1 to C8, neon, helium and carbon dioxide.
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) | 1978-12-29 | 1979-06-30 | 1979-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-29 | 1983-06-30 | 1983-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-29 | 1987-06-30 | 1987-12-30 | $7700.00 | Window Closed / Lapsed |