US4117066A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Novel process for the complete isolation and rapid drying of solids from suspensions
Assignee: BASF Corp
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Filing: 1977-01-31
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Granted: 1978-09-26
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Expires: 1997-01-31
Abstract
Abstract A novel process for the complete isolation and rapid drying of a solid, or mixtures of solids, from a suspension, is described in that there is added to the aqueous or organic suspension containing said solid an additional liquid, or a mixture of such liquids, which is a solvent for the solid contained in the suspension, and which liquid is insoluble, or soluble to only a limited extent, in the suspension liquid, in such a way that a multiphase system is formed; and the mixture is maintained in a state of intense turbulence until agglomerates of the solid are formed; and this is then seperated from the multiphase system and optionally dried.
Inventors
- 👤 Hans Mollet
- 👤 Roland Haberli
- 👤 Alberto Rabassa
- 👤 Fridolin Babler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 21:09
CPC Classifications
B; B01; B01J; B01J2/00; B01D; B01D12/00
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
120 words
A process for the agglomeration of solid suspended particles in a multiphase system comprising: a. forming a suspension of the solid particles in a first liquid; b. gradually adding to said suspension at room temperature, a second liquid which is soluble to the extent of up to about 20% in the first liquid at 20° C and in which second liquid the solid substance is partially soluble, in an agglomerating amount such that a multiphase system is formed and said solid substance is partially dissolved by said second liquid; c. simultaneously agitating said multiphase system by intense turbulence until agglomerates of said solid particles are formed; d. separating said agglomerates from the multiphase system; and e. drying the separated agglomerates.
Claim 2
Dependent Claim
120 words
A process for the agglomeration of solid suspended particles in a multiphase system comprising: a. forming a suspension of the solid particles in a first liquid; b. gradually adding to said suspension at room temperature, a second liquid which is soluble to the extent of up to about 20% in the first liquid at 20° C and in which second liquid the solid substance is partially soluble, in an agglomerating amount such that a multiphase system is formed and said solid substance is partially dissolved by said second liquid; c. simultaneously agitating said multiphase system by intense turbulence until agglomerates of said solid particles are formed; d. separating said agglomerates from the multiphase system; and e. drying the separated agglomerates.
Claim 3
Dependent Claim
40 words
The process according to claim 1, wherein said solid particles are selected from the group consisting of dyestuffs, organic pigments, optical brighteners, textile auxiliaries, pharmaceuticals, pest-control agents, antimicrobics, bacteriostatics, detergents, paper auxiliaries, photochemicals, leather chemicals, plastics, polymers and plastic additives.
Claim 4
Dependent Claim
17 words
The process according to claim 1, wherein the agglomerates are separated from the multiphase system by filtration.
Claim 5
Dependent Claim
17 words
The process according to claim 1, wherein the agglomerates are separated from the multiphase system by decantation.
Claim 6
Dependent Claim
13 words
The process according to claim 1, wherein the agglomerates are separated by flotation.
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) | 1981-09-25 | 1982-03-27 | 1982-09-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-09-25 | 1986-03-27 | 1986-09-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-09-25 | 1990-03-27 | 1990-09-26 | $7700.00 | Window Closed / Lapsed |