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US 4,057,442 AGranted
Method of disposal of pyrotechnic compositions
AssigneeThiokol Corporation
InventorsGraham C. Shaw, Emil A. Lawton, Leon L. Jones
Life of this patent
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Abstract
A method for safe, relatively air-pollution free disposal of pyrotechnic compositions is disclosed. High percentage recoveries of the inorganic oxidizer and metallic fuel are achieved, resulting in significant cost benefits, while using a minimum of energy.
Claims19
A process for the disposal of a solid pyrotechnic composition substantially comprising a solid polymeric binder containing discrete particles of inorganic oxidizer and metallic fuel dispersed therein;
- and allowing for the recovery of said inorganic oxidizer and metallic fuel which comprises:
- a. disrupting the matrix structure of said polymeric binder by treating said pyrotechnic composition with a swelling agent, or depolymerizing agent, substantially chemically unreactive with said inorganic oxidizer and said metallic fuel;
- b. separating the inorganic oxidizer and metallic fuel from the disrupted polymeric matrix of step a;
- c. contacting the inorganic oxidizer and metallic fuel from step b with a fluid selected from water, or a fluid having a density intermediate to that of the inorganic oxidizer and metallic fuel, and being substantially chemically unreactive therewith, to form a mixture which comprises, a solution of inorganic oxidizer and solid metallic fuel, or a layer of solid metallic fuel, a layer of said fluid of intermediate density and a layer of solid inorganic oxidizer;
- and
- d. separating said mixture of step c.
3 more elements
Dependencies are inferred from the claim text.