METHOD OF RECOVERING POWERED ALUMINUM FROM ALUMINUM-POLYMER MIXTURES
Assignee
MORTON THIOKOL, INC., 110 NORTH WACKER DRIVE, CHICAGO, ILLINOIS, 60606, A CORP OF DELAWARE
Filed
Dec 4, 1985
Granted
Jan 12, 1988
Location
BRIGHAM CITY UT US
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 DEG C. Most organic compounds, including polymers, are oxidized to carbon dioxide at much lower temperatures (400 DEG -600 DEG C.). Due to this difference in reactivity, it is possible to remove the polymer from the aluminum as carbon dioxide leaving the aluminum residue.
Source: Google Patents
35 USC §181 Secrecy Order
Imposed
May 19, 1986
Rescinded
Jul 23, 1987
Duration
1 year, 2 months
Inventor
- 1RALPH C. RAISOR
Record Details
- Patent number
- US 4718955
- Application
- 06804551
- Aerospace match
- Yes
- Dataset source
- 35 USC §181 SO records
Browse by Assignee
MORTON THIOKOL, INC., 110 NORTH WACKER DRIVE, CHICAGO, ILLINOIS, 60606, A CORP OF DELAWAREMore from this assignee
METHOD AND APPARATUS FOR REMOVING SOLID PROPELLANT FROM ROCKET MOTOR CASES
MORTON THIOKOL, INC., 110 NORTH WACKER DRIVE, CHICAGO, ILLINOIS, 60606, A CORP OF DELAWARE
TAPE WRAPPED, FABRIC REINFORCED, FLEX BEARING
MORTON THIOKOL, INC., 110 NORTH WACKER DRIVE, CHICAGO, ILLINOIS, 60606, A CORP OF DELAWARE
Related by domain
GAS TURBINE ENGINE COMBUSTOR HAVING TRAPPED DUAL VORTEX CAVITY
General Electric
SOLID ROCKET PROPELLANT
GAS TURBINE ENGINE FAN (U)
General Electric
TURNING VANE ARRANGEMENT FOR IR SUPPRESSORS
SIKORSKY AIRCRAFT CORPORATION
MODULAR ROCKET BOOSTED PENETRATING WARHEAD
LOCKHEED MARTIN CORP.
INTEGRAL SOLID BOOSTER AND HYBRID THRUST SUSTAINING SYSTEM AND PROJECTILE INCORPORATING THE SAME
ENVIRONMENTAL AEROSCIENCE CORPORATION