US3844726A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for manufacturing granules containing sodium chlorite in a fluidized bed drier
Assignee: Solvay SA
•
Filing: 1972-04-12
•
Granted: 1974-10-29
•
Expires: 1992-04-12
Abstract
Abstract A process for the manufacture of granules containing sodium chlorite from an aqueous medium containing sodium chlorite, including the steps of passing the medium into a fluidized bed drier for evaporating water from the medium, and maintaining in the drier a constant presence of seeds smaller than the required granules.
Inventors
- 👤 J Denaeyer
- 👤 W Kegelart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:11
CPC Classifications
C; C01; C01B; C01B11/00; C01B11/08; C01B11/10; B; B01; B01J; B01J8/00; B01J8/0015; B01J8/002; F; F26; F26B; F26B3/00; F26B3/02; F26B3/06; F26B3/08
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
92 words
A PROCESS FOR THE MANUFACTURE OF GRANULES CONTAINING SODIUM CHLORITE FROM AN AQUEOUS LIQUID MEDIUM CONTAINING SODIUM CHLORITE, COMPRISING THE STEPS OF EVAPORATING WATER FROM SAID MEDIUM BY PASSING SAID MEDIUM INTO A FLUIDIZED BED DRIER CONTAINING A FLUIDIZED BED OF PARTICLES FLUIDIZED WITH A CARRIER GAS HAVING A TEMPERATURE AT THE BASE OF THE FLURIDIZED BED OF FROM 120*C TO LESS THAN 180*C, WHILE MAINTAINING IN SAID FLURIDIZED BED A CONSTANT PRESENCE OF SEEDS, SMALLER IN SIZE THAN THE REQUIRED GRANULES AND MAINTAINING THE TEMPERATURE IN THE FLUIDIZED BED BELOW 80*C.
Claim 2
Dependent Claim
92 words
A PROCESS FOR THE MANUFACTURE OF GRANULES CONTAINING SODIUM CHLORITE FROM AN AQUEOUS LIQUID MEDIUM CONTAINING SODIUM CHLORITE, COMPRISING THE STEPS OF EVAPORATING WATER FROM SAID MEDIUM BY PASSING SAID MEDIUM INTO A FLUIDIZED BED DRIER CONTAINING A FLUIDIZED BED OF PARTICLES FLUIDIZED WITH A CARRIER GAS HAVING A TEMPERATURE AT THE BASE OF THE FLURIDIZED BED OF FROM 120*C TO LESS THAN 180*C, WHILE MAINTAINING IN SAID FLURIDIZED BED A CONSTANT PRESENCE OF SEEDS, SMALLER IN SIZE THAN THE REQUIRED GRANULES AND MAINTAINING THE TEMPERATURE IN THE FLUIDIZED BED BELOW 80*C.
Claim 3
Dependent Claim
23 words
A process as claimed in claim 1 wherein the step of maintaining includes introducing the seeds into the drier from an external source.
Claim 4
Dependent Claim
29 words
A process as claimed in claim 1 wherein the step of maintaining includes forming the seeds in situ in the drier by mechanically comminuting granules in the fluidized bed.
Claim 5
Dependent Claim
29 words
A process as claimed in claim 1 wherein the step of maintaining includes forming the seeds in the drier by dessicating individual droplets obtained by atomizing the aqueous medium.
Claim 6
Dependent Claim
29 words
A process as claimed in claim 3 wherein the step of maintaining includes gas jet feeding the aqueous medium into the bed for mechanically comminuting granules in the bed.
Claim 7
Dependent Claim
33 words
A process as claimed in claim 1 wherein the step of maintaining includes moving a scraper on the base of the drier for preventing compaction of the particles present in the fluidized bed.
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) | 1977-10-28 | 1978-04-29 | 1978-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-28 | 1982-04-29 | 1982-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-28 | 1986-04-29 | 1986-10-29 | $7700.00 | Window Closed / Lapsed |