US4022820A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solidification and crystallization of materials
Assignee: Monsanto Co
•
Filing: 1974-11-12
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Granted: 1977-05-10
•
Expires: 1994-11-12
Abstract
Abstract Liquid materials which are difficult to crystallize and which may be subject to supercooling are solidified and crystallized by contacting the liquid material with an agitated, fluidized bed of solid particles of the same material. The bed of solid particles is agitated by means of a mechanical agitator and a current of fluidizing and cooling gas which enters the bottom portion of the bed vertically but is baffled toward the periphery of the bed.
Inventors
- 👤 Anders A. Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 08:29
CPC Classifications
B; B01; B01D; B01D9/00; B01D9/0004; B01D9/0009; B01D9/0036
Claims Analysis
Total Claims: 33
Claim 1
Independent Claim
115 words
Process for solidifying and crystallizing liquid material which comprises a. feeding liquid material into solidification and crystallization means; whereby b. said material contacts an agitated, fluidized bed of solid particles of said material; thereby c. dispersing said liquid material within said bed while removing heat of crystallization from said liquid material; thereby d. causing said fluidized particles to become coated with said dispersed liquid material; e. providing a continually replenished bed of fluidized particles by the action of shearing forces within said bed; and f. allowing the level of said bed to rise as new particles are formed; and g. collecting solidified, crystallized product by allowing coated particles to overflow said solidification and crystallization chamber.
Claim 2
Dependent Claim
115 words
Process for solidifying and crystallizing liquid material which comprises a. feeding liquid material into solidification and crystallization means; whereby b. said material contacts an agitated, fluidized bed of solid particles of said material; thereby c. dispersing said liquid material within said bed while removing heat of crystallization from said liquid material; thereby d. causing said fluidized particles to become coated with said dispersed liquid material; e. providing a continually replenished bed of fluidized particles by the action of shearing forces within said bed; and f. allowing the level of said bed to rise as new particles are formed; and g. collecting solidified, crystallized product by allowing coated particles to overflow said solidification and crystallization chamber.
Claim 3
Dependent Claim
13 words
Process of claim 1 wherein said material is an ester of dicarboxylic acid.
Claim 4
Dependent Claim
11 words
Process of claim 2 wherein said acid is an aromatic acid.
Claim 5
Dependent Claim
10 words
Process of claim 2 wherein said acid is phthalic acid.
Claim 6
Dependent Claim
11 words
Process of claim 2 wherein said ester is a dicycloalkyl ester.
Claim 7
Dependent Claim
11 words
Process of claim 2 wherein said ester is a diaryl ester.
Claim 8
Dependent Claim
10 words
Process of claim 5 wherein said ester is dicyclohexyl phthalate.
Claim 9
Dependent Claim
10 words
Process of claim 6 wherein said ester is diphenyl phthalate.
Claim 10
Dependent Claim
11 words
Process of claim 1 wherein said material is a thermoplastic polymer.
Claim 11
Dependent Claim
10 words
Process of claim 9 wherein said polymer is a polyolefin.
Claim 12
Dependent Claim
9 words
Process of claim 10 wherein said polyolefin is polyethylene.
Claim 13
Dependent Claim
34 words
Process of claim 1 wherein said fluidization is accomplished and heat of crystallization of said liquid material is removed by contacting said material with a fluidizing gas having a temperature lower than said material.
Claim 14
Dependent Claim
26 words
Process of claim 12 wherein said material is contacted with said gas at the periphery of said bed, said gas being vertically directed through said bed.
Claim 15
Dependent Claim
9 words
Process of claim 12 wherein said gas is air.
Claim 16
Dependent Claim
11 words
Process of claim 12 wherein said gas is an inert gas.
Claim 17
Dependent Claim
9 words
Process of claim 15 wherein said gas is nitrogen.
Claim 18
Dependent Claim
10 words
Process of claim 16 wherein said gas is carbon dioxide.
Claim 19
Dependent Claim
16 words
Process of claim 12 wherein the initial temperature of said gas is ambient temperature or below.
Claim 20
Dependent Claim
20 words
Process of claim 18 wherein the maximum temperature rise of said gas is from 4° C. to about 19° C.
Claim 21
Dependent Claim
18 words
Process of claim 19 wherein said maximum temperature rise is from about 7° C. to about 15° C.
Claim 22
Dependent Claim
18 words
Process of claim 2 wherein said maximum temperature rise is from about 10° C. to about 130° C.
Claim 23
Dependent Claim
20 words
Process of claim 12 wherein said gas is removed from said solidification and crystallization means after reaching said maximum temperature.
Claim 24
Dependent Claim
17 words
Process of claim 22 wherein said gas is cooled and reintroduced to said solidification and crystallization means.
Claim 25
Dependent Claim
22 words
Process of claim 12 wherein said liquid material is concurrently contacted with an inert heat transfer agent having a high vapor pressure.
Claim 26
Dependent Claim
9 words
Process of claim 24 wherein said agent is water.
Claim 27
Dependent Claim
11 words
Process of claim 24 wherein said agent is solid carbon dioxide.
Claim 28
Dependent Claim
11 words
Process of claim 24 wherein said agent is liquid carbon dioxide.
Claim 29
Dependent Claim
10 words
Process of claim 24 wherein said agent is liquid nitrogen.
Claim 30
Dependent Claim
11 words
Process of claim 24 wherein said agent is a fluorinated hydrocarbon.
Claim 31
Dependent Claim
11 words
Process of claim 24 wherein said agent is an organic solvent.
Claim 32
Dependent Claim
22 words
Process of claim 12 wherein the average flow rate of said gas is from about 48 to about 90 meters per minute.
Claim 33
Dependent Claim
18 words
Process of claim 31 wherein said flow rate is from about 55 to about 65 meters per minute.
References Cited (Backward Citations)
US3251428A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-05-09 | 1980-11-08 | 1981-05-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-05-09 | 1984-11-08 | 1985-05-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-05-09 | 1988-11-08 | 1989-05-10 | $7700.00 | Window Closed / Lapsed |