Abstract: The specification discloses a method for the treatment of particulate material contaminated with polyhalogenated aromatic compounds (PHAs). The method includes vaporizing the PHAs from the material and dissolving the vaporized PHAs in a glycol-based solvent solution. The PHAs are then removed from the solution so that the glycol can be reused.

Abstract: A thermal treatment process employs an indirectly fired rotary kiln in which matrix material contaminated with organic substances such as dioxins, PCBs, PAHs, fuel oils, and the like is heated as the material is advanced through the kiln to cause components of the organics to be released as vapor. Purge gas of low oxygen content is conducted through the kiln at a relatively low velocity of from about 0.5 ft./sec. to about 10 ft./sec. to gently sweep the vaporized components of the organic substances from the kiln and to minimize the entrainment of solid particulates, and to produce an off gas mixture including the vaporized components. The off gas is conditioned after removal from the kiln to render it acceptable for discharge to the atmosphere. The oxygen concentration in the kiln is maintained at a sufficiently low level to substantially prevent combustion of the vaporized organic components in the kiln.

Abstract: A composite brazing material is described, composed of a layer (usually an ingot) of high manganese content aluminum alloy (3000 series alloy; the "core") and a layer of high silicon content aluminum alloy (4000 series alloy; the "cladding") with a layer of aluminum alloy having the following composition:______________________________________ silicon 6.8-8.2 wgt. % iron up to 0.8 wgt. % copper up to 0.25 wgt. % manganese up to 0.10 wgt. % zinc up to 0.20 wgt. % other elements up to 0.15 wgt. % aluminum balance ______________________________________disposed between the cladding and core layers and in contact with both. Subsequent hot rolling of the multi-layer composite produces a good bond between the core and the cladding through the intermediate layer. The resulting brazing material has the external properties of a simple two-layer composite of core and cladding without the intermediate layer.

Abstract: 1. A solid rocket propellant composition which consists essentially of from about:1. 30-60 weight per cent of a double base propellant2. 5-30 weight per cent of a finely divided metal fuel3. 5-30 weight per cent of an inorganic oxidizer4. 10-30 weight per cent of triaminoguanidinium azide.