Patent US3941066A successfully refreshed from Google Patents.
US3941066A
Expired / Lapsed
US
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Method for disposal of waste synthetic high polymer
Assignee: Kawasaki Motors Ltd
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Filing: 1972-03-03
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Granted: 1976-03-02
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Expires: 1992-03-03
Abstract
Abstract Waste synthetic high polymer, especially those containing polyvinyl chloride and the like chlorine-containing synthetic resins are heated at 200°-500°C to thereby form a hot molten bath of fusible materials contained in the waste resin mixture and the chlorine-containing resins are effectively decomposed in the molten bath kept at the temperature of 200°-500°C with the generation of hydrogen chloride gas which can be recovered as hydrochloric acid.
Inventors
- 👤 Hayami Itoh
- 👤 Mamoru Yamada
- 👤 Yasuo Nozaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 14:42
CPC Classifications
F; F23; F23G; F23G7/00; F23G7/12; C; C01; C01B; C01B7/00; C01B7/01; C01B7/03; C01B7/035; C10; C10B; C10B53/00; C10B53/07; Y; Y02; Y02P; Y02P20/00; Y02P20/141; Y02P20/143
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
106 words
A method for the disposal treatment of a waste synthetic high polymer at least part of which is fusible at temperatures below 500°C which comprises: a. heating said waste synthetic high polymer at a temperature of from 200° to 500°C to thereby melt said fusible portion thereof, b. decomposing the remainder of said waste synthetic high polymer in a hot molten bath formed of said melted fusible portion thereof at a temperature of from 200° to 500°C; and c. disposing of said hot molten bath, wherein at least a part of said hot molten bath is burned as fuel for heating the waste synthetic high polymer.
Claim 2
Independent Claim
106 words
A method for the disposal treatment of a waste synthetic high polymer at least part of which is fusible at temperatures below 500°C which comprises: a. heating said waste synthetic high polymer at a temperature of from 200° to 500°C to thereby melt said fusible portion thereof, b. decomposing the remainder of said waste synthetic high polymer in a hot molten bath formed of said melted fusible portion thereof at a temperature of from 200° to 500°C; and c. disposing of said hot molten bath, wherein at least a part of said hot molten bath is burned as fuel for heating the waste synthetic high polymer.
Claim 3
Dependent Claim
29 words
The method of claim 1, wherein the disposing of said hot molten bath containing said decomposed waste synthetic high polymer is by atomizing in a combustion chamber and burning.
References Cited (Backward Citations)
US2248512A
Cited
US2470361A
Cited
US3220798A
Cited
US3445192A
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US3303798A
Cited
US3441628A
Cited
US3589864A
Cited
US3716339A
Cited
US3572265A
Cited
US3832151A
Cited
US3750600A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-03-02 | 1979-09-01 | 1980-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-03-02 | 1983-09-01 | 1984-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-03-02 | 1987-09-01 | 1988-03-02 | $7700.00 | Window Closed / Lapsed |