Method of recovering powered aluminum from aluminum-polymer mixt

Details Method of recovering powered aluminum from aluminum-polymer mixt Method of recovering powered aluminum from aluminum-polymer mixt

1985-12-04

1988-01-12

Lechert, Jr., Stephen J.

Explosive and thermic compositions or charges

Processes of making

75 68C, 149124, D03D 2300

Patent

active

047189550

ABSTRACT:
Solid composite propellants for rocket motors normally consist of an oxidizer and and aluminum powder cured in a polymeric binder system. The oxidizer, ammonium perchlorate, can be readily removed by suitable solvents leaving a residue consisting primarily of aluminum and polymer. The aluminum and polymer are separated by a process that is based upon the differential oxidation of the polymer leaving the aluminum in its original powder form. Aluminum metal forms, on exposure to air, an extremely tough inert aluminum oxide coating. Because of this, aluminum is extremely resistant to further oxidation even at temperatures up to its melting point at 660.degree. C. Most organic compounds, including polymers, are oxidized to carbon dioxide at much lower temperatures (400.degree.-600.degree. C.). Due to this difference in reactivity, it is possible to remove the polymer from the aluminum as carbon dioxide leaving the aluminum residue.

REFERENCES:
patent: 3165397 (1965-01-01), Lobo
patent: 3867296 (1975-02-01), Hunt
patent: 4548651 (1985-10-01), Ramsey

Affiliated with

Also associated with

Rating

Method of recovering powered aluminum from aluminum-polymer mixt does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method of recovering powered aluminum from aluminum-polymer mixt, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of recovering powered aluminum from aluminum-polymer mixt will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-919824