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Title: Staged mold for encapsulating hazardous wastes

Abstract

A staged mold for stabilizing hazardous wastes for final disposal by molding an agglomerate of the hazardous wastes and encapsulating the agglomerate. Three stages are employed in the process. In the first stage, a first mold body is positioned on a first mold base, a mixture of the hazardous wastes and a thermosetting plastic is loaded into the mold, the mixture is mechanically compressed, heat is applied to cure the mixture to form a rigid agglomerate, and the first mold body is removed leaving the agglomerate sitting on the first mold base. In the second stage, a clamshell second mold body is positioned around the agglomerate and the first mold base, a powdered thermoplastic resin is poured on top of the agglomerate and in the gap between the sides of the agglomerate and the second mold body, the thermoplastic is compressed, heat is applied to melt the thermoplastic, and the plastic is cooled jacketing the agglomerate on the top and sides. In the third stage, the mold with the jacketed agglomerate is inverted, the first mold base is removed exposing the former bottom of the agglomerate, powdered thermoplastic is poured over the former bottom, the first mold base is replacedmore » to compress the thermoplastic, heat is applied to melt the new thermoplastic and the top part of the jacket on the sides, the plastic is cooled jacketing the bottom and fusing with the jacketing on the sides to complete the seamless encapsulation of the agglomerate.« less

Inventors:
 [1];  [2];  [3]
  1. (Los Angeles, CA)
  2. (Alhambra, CA)
  3. (Rolling Hills Estates, CA)
Issue Date:
Research Org.:
ENVIRONMENTAL POLYMERS INC
OSTI Identifier:
866646
Patent Number(s):
4756681
Assignee:
Environmental Protection Polymers, Inc. (Hawthorne, CA) OSTI
DOE Contract Number:  
AC03-83ER80103
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
staged; mold; encapsulating; hazardous; wastes; stabilizing; final; disposal; molding; agglomerate; stages; employed; process; stage; positioned; base; mixture; thermosetting; plastic; loaded; mechanically; compressed; heat; applied; cure; form; rigid; removed; leaving; sitting; clamshell; powdered; thermoplastic; resin; poured; top; gap; melt; cooled; jacketing; third; jacketed; inverted; exposing; former; bottom; replaced; compress; jacket; fusing; complete; seamless; encapsulation; removed leaving; staged mold; powdered thermoplastic; former bottom; cooled jacketing; thermoplastic resin; third stage; mold base; hazardous waste; hazardous wastes; removed exposing; rigid agglomerate; seamless encapsulation; thermosetting plastic; stabilizing hazardous; agglomerate sitting; mechanically compressed; final disposal; encapsulating hazardous; jacketed agglomerate; setting plastic; /425/264/588/976/

Citation Formats

Unger, Samuel L., Telles, Rodney W., and Lubowitz, Hyman R. Staged mold for encapsulating hazardous wastes. United States: N. p., 1988. Web.
Unger, Samuel L., Telles, Rodney W., & Lubowitz, Hyman R. Staged mold for encapsulating hazardous wastes. United States.
Unger, Samuel L., Telles, Rodney W., and Lubowitz, Hyman R. Fri . "Staged mold for encapsulating hazardous wastes". United States. https://www.osti.gov/servlets/purl/866646.
@article{osti_866646,
title = {Staged mold for encapsulating hazardous wastes},
author = {Unger, Samuel L. and Telles, Rodney W. and Lubowitz, Hyman R.},
abstractNote = {A staged mold for stabilizing hazardous wastes for final disposal by molding an agglomerate of the hazardous wastes and encapsulating the agglomerate. Three stages are employed in the process. In the first stage, a first mold body is positioned on a first mold base, a mixture of the hazardous wastes and a thermosetting plastic is loaded into the mold, the mixture is mechanically compressed, heat is applied to cure the mixture to form a rigid agglomerate, and the first mold body is removed leaving the agglomerate sitting on the first mold base. In the second stage, a clamshell second mold body is positioned around the agglomerate and the first mold base, a powdered thermoplastic resin is poured on top of the agglomerate and in the gap between the sides of the agglomerate and the second mold body, the thermoplastic is compressed, heat is applied to melt the thermoplastic, and the plastic is cooled jacketing the agglomerate on the top and sides. In the third stage, the mold with the jacketed agglomerate is inverted, the first mold base is removed exposing the former bottom of the agglomerate, powdered thermoplastic is poured over the former bottom, the first mold base is replaced to compress the thermoplastic, heat is applied to melt the new thermoplastic and the top part of the jacket on the sides, the plastic is cooled jacketing the bottom and fusing with the jacketing on the sides to complete the seamless encapsulation of the agglomerate.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1988},
month = {1}
}

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