US3556024A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of reducing halogen emissions from the incineration of halogen-containing plastics
Assignee: Dow Chemical Co
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Filing: 1969-06-27
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Granted: 1971-01-19
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Expires: 1989-06-27
Abstract
Abstract The present invention is a method for reducing the amount of halogen emitted during the incineration of halogen-containing plastics. The method involves applying an alkali to the plastic before it is burned. The method can reduce the emission of halogen by greater than 75 percent when properly employed.
Inventors
- 👤 William R Fuller
- 👤 Barrie H Bieder
- 👤 David C Morgan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 12:55
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/34; B01D53/46; B01D53/68; B01D53/70; C; C08; C08K; C08K3/00; C08K3/18; C08K3/20; C08K3/22; C10; C10L; C10L10/00; C10L10/02; C10L9/00; C10L9/10; F; F23; F23G; F23G5/00; F23G5/02; F23G7/00; F23G7/12
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
25 words
The method of claim 1 wherein the alkali is selected from the group consisting of alkali metal hydroxides, oxides, carbonates, carbonxylates, xanthates, sulfites and hydrosulfites.
Claim 2
Dependent Claim
26 words
The method of claim 1 wherein the alkali is selected from the group consisting of alkaline earth metal hydroxides, oxides, carbonates, carboxylates, xanthates, sulfites and hydrosulfites.
Claim 3
Dependent Claim
28 words
The method of claim 1 wherein the alkali is sodium hydroxide and it is applied to the plastic to be burned in the form of a water solution.
Claim 4
Dependent Claim
14 words
The method of claim 1 wherein the plastic is in admixture with waste paper.
Claim 5
Dependent Claim
21 words
The method of claim 4 wherein the sodium hydroxide is applied to the plastic in the form of a particulate solid.
Claim 6
Dependent Claim
15 words
The method of claim 6 wherein the size of the particles is approximately 200 mesh.
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) | 1974-01-18 | 1974-07-20 | 1975-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-18 | 1978-07-20 | 1979-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-18 | 1982-07-20 | 1983-01-19 | $7700.00 | Window Closed / Lapsed |