Patent DE449985C successfully refreshed from Google Patents.
Patent US4284514A successfully refreshed from Google Patents.
US4284514A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Treatment of hazardous waste
Assignee: STABLEX USA Inc WILMINGTON DE A CORP OF DE
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Filing: 1979-12-20
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Granted: 1981-08-18
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Expires: 1999-12-20
Abstract
Abstract In a process for pretreating hazardous waste prior to solidification the waste is received in containers (10). The containers are deposited in a large vessel containing a chemical pretreatment media (9) and subjected to an agitating process in the vessel whereby the containers are ruptured and their contents deposited in the media. Neutralization, precipitation and chemical modification processes are envisaged in the container. After pretreatment the liquid is removed for ultimate solidification.
Inventors
- 👤 David R. Wright
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 11:50
CPC Classifications
C; C02; C02F; C02F11/00; C02F11/008; Y; Y10; Y10S; Y10S210/00; Y10S210/902; Y10S210/903; Y10S210/904; Y10S210/911; Y10S210/912; Y10S210/913; Y10S241/00; Y10S241/38
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
100 words
A process for pretreating hazardous waste received in containers at a waste disposal plant prior to solidification, such method comprising placing the containers unopened in a vessel containing a liquid pretreatment media which neutralizes, precipitates or chemically modifies said hazardous waste, submitting the containers in the vessel to an agitating process which ruptures the containers thereby depositing the hazardous waste into the vessel to be acted upon by the pretreatment media thoroughly mixing said hazardous waste and pretreatment media to form a treated liquid and reduce said containers to particles, and removing said treated liquid from said vessel for solidification.
Claim 2
Dependent Claim
100 words
A process for pretreating hazardous waste received in containers at a waste disposal plant prior to solidification, such method comprising placing the containers unopened in a vessel containing a liquid pretreatment media which neutralizes, precipitates or chemically modifies said hazardous waste, submitting the containers in the vessel to an agitating process which ruptures the containers thereby depositing the hazardous waste into the vessel to be acted upon by the pretreatment media thoroughly mixing said hazardous waste and pretreatment media to form a treated liquid and reduce said containers to particles, and removing said treated liquid from said vessel for solidification.
Claim 3
Dependent Claim
35 words
A method as claimed in claim 1 wherein the agitating process is carried out in the vessel by members depending from arms rotatably driven by an upstanding shaft in the central part of the receptacle.
Claim 4
Dependent Claim
17 words
A method as claimed in claim 1 or 2 wherein the pretreatment media is a neutralising media.
Claim 5
Dependent Claim
22 words
The method of claim 3 wherein at least two pretreatment media are successively added to carry out more than one pretreatment step.
Claim 6
Dependent Claim
40 words
A method as claimed in either claim 1 or claim 2 wherein the hazardous waste comprises a soluble hazardous component and the pretreatment media comprises a substance which reacts with the soluble component to precipitate it as an insoluble component.
Claim 7
Dependent Claim
22 words
The method of claim 5 wherein at least two pretreatment media are successively added to carry out more than one pretreatment step.
Claim 8
Dependent Claim
31 words
A method as claimed in either claim 1 or claim 2 wherein the media comprises a chemically modifying agent and the waste in the containers requires chemical modification prior to solidification.
Claim 9
Dependent Claim
22 words
The method of claim 7 wherein at least two pretreatment media are successively added to carry out more than one pretreatment step.
Claim 10
Dependent Claim
27 words
A method as claimed in claim 7 wherein the waste contains a cyanide and the media is an oxidising agent to convert the cyanide to a cyanate.
Claim 11
Dependent Claim
22 words
The method of claim 9 wherein at least two pretreatment media are successively added to carry out more than one pretreatment step.
Claim 12
Dependent Claim
26 words
A method as claimed in claim 1 or 2, wherein at least two pretreatment media are successively added to carry out more than one pretreatment step.
Claim 13
Dependent Claim
21 words
A method as claimed in claim 1 or 2 wherein the pretreatment media is, or is derived from, a hazardous waste.
Claim 14
Dependent Claim
125 words
In a process for disposing of a hazardous waste material by a solidification process which converts said waste material into a harmless synthetic rock, the improved process for handling closed containers in which the said hazardous waste material is confined while avoiding contact with the hazardous waste material comprising placing the closed containers in a vessel which contains a liquid pretreatment media which neutralizes, precipitates or chemically modifies said hazardous waste material and reduces it hazardous characteristics, agitating the said liquid pretreatment media to move the containers in the liquid pretreatment media and rupture the containers thoroughly mixing said hazardous waste and pretreatment media to form a treated liquid and reduce said containers to particles, and removing said treated liquid from said vessel for solidification.
Claim 15
Dependent Claim
125 words
In a process for disposing of a hazardous waste material by a solidification process which converts said waste material into a harmless synthetic rock, the improved process for handling closed containers in which the said hazardous waste material is confined while avoiding contact with the hazardous waste material comprising placing the closed containers in a vessel which contains a liquid pretreatment media which neutralizes, precipitates or chemically modifies said hazardous waste material and reduces it hazardous characteristics, agitating the said liquid pretreatment media to move the containers in the liquid pretreatment media and rupture the containers thoroughly mixing said hazardous waste and pretreatment media to form a treated liquid and reduce said containers to particles, and removing said treated liquid from said vessel for solidification.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-08-17 | 1985-02-16 | 1985-08-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-08-17 | 1989-02-16 | 1989-08-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-08-17 | 1993-02-16 | 1993-08-18 | $7700.00 | Window Closed / Lapsed |