Volatile solvent powder containing

Cordite MD, it may be noted, is a double base powder made with volatile solvent and containing a non-volatile, non-explosive non-solvent, namely mineral jelly, and is classified in class II a d,... 

Reactants and reagents can be conveniently loaded into the dry zeolite by adsorption. This can be accomplished by intimately mixing the solid or liquid reactant and the powdered zeolite, by absorption from the gas phase, or by diffusion in a solvent slurry containing the zeolite and dissolved reactant. The choice of solvent for the slurry method is critical. It must be volatile enough to be removable at a pressure and temperature that does not result in evacuation of the reactant or its decomposition. In addition, the reactant must have a greater affinity for the interior of the zeolite than for the slurry solvent itself. The lack of affinity for the interior of the zeolite is an acute problem for non-polar hydrocarbons that lack binding sites for the intrazeolitic cations. The use of fluorocarbons such as perfluorohexane as slurry solvents takes advantage of the fluorophobicity of many hydrocarbons and has alleviated this problem to some extent.29... 

Smokeless powders containing nitroglycerine are classified into two types those produced with the use of a volatile solvent and those produced without such a solvent. In both types nitrocellulose is in a completely colloidal form. 

Double base powders, i.e. nitroglycerine powders without a volatile solvent also include modem flashless powders containing nitroguanidine. 

Since the powder contains no volatile solvent it does not require long drying (cf. the manufacture of cordite). Drying lasts only a few hours and its purpose is solely to equalize the moisture content in the powder tubes. 

Cannon Powders). Single-base proplnts intended for use in cannons are solid compns contg as a major ingredient NC, fully gelatinized by a volatile solvent(such as eth-alc) with or vjb DNT, TNT or MNN which act as auxiliary gelatinizers and as flash reducers. As minor ingredients, these proplnts contain a stabilizer(such as DPhA) with or vfo a flash reducer(such as K sulfate)... 

Solvent recovery. The green powder contains a large amount of ether and alcohol which presents a twofold problem (1) the recovery of as much of the valuable volatile solvent as is economically feasible, and (2) the removal of the solvent to such an extent that the finished powder will not be disposed either to give off or to take up much volatile matter or moisture under changing atmospheric conditions. For the recovery of the solvent, the pow-... 

The process for the manufacture of ball-grain powder which Olsen and his co-workers have devised 26 combines nicely with Olsen s process for the quick stabilization of nitrocellulose to form a sequence of operations by which a finished powder may be produced more rapidly and more safely than by the usual process. It supplies a convenient means of making up a powder which contains non-volatile solvents throughout the mass of the grains or deterrent or accelerant coatings upon their surface. 

In addition to their use on highways and roofs, both hot poured and room temperature hardening bituminous compositions have been used as caulking materials and sealants in building construction. The classical agphalt/ashestos sealants contained volatile solvents and their resistance to solvents was increased by the incorporation of coal tar. These sealants have also been modified by the addition of elastomers, such as powdered rubber, and fillers, such as sawdust.12... 

Diffuse reflectance or DRIFTS (diffuse reflectance infrared Fourier-lransform spectroscopy) allows the sain)le to be analysed neat, ot diluted in a non-absorbing matrix (e.g. KCl or KBr at 1-5% w/w analyte). DRIFTS also may be used to obtain the spectrum of a solute in a volatile solvent by evaporating the solution onto KBr. When the IR radiation interacts with the powdered sample it will be absorbed, reflected and diffracted. The radiation which has been diffusely reflected contains vibrational information on the molecule. This technique allows non-destructive testing of neat materials and is suited to quantitative analysis, although care must be taken to ensure that a consistent particle size is used. 

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