AN propellant

Some AN propellent compns developed in the USA since WW II are classified and cannot be described in this work... 

The Table on next page lists some recently developed US AN propellants which are not classified... 

Tecante and Choplin [542] investigated a stirrer arrangement consisting of an propeller mixer and a helical ribbon stirrer in a laboratory tank (D = 210 mm d = H = 185 mm D/d = 1.14). Aqueous solutions of CMC, xanthan and polyacrylamide were used as material systems. The evaluation proceeded according to equation (4.32). The following sorption characteristics were obtained ... 

Phenyl-1,2-propanedione (Aldrich, 99%) was hydrogenated in a pressurized reactor (Parr 4560, V=300 cm ) in the absence of external and internal mass transfer limitation (verified experimentally). The reactor was equipped with an propeller type stirrer (four blades, propeller diameter 35 mm) operating at stirring rate of 1950 rpm. The hydrogen (AGA, 99.999%) pressure was 6.5 bar and teii ierature was 15 - 35°C. Pt/Al203 (Strem Chemicals, 78-1660) was used as a catalyst. The catalyst mass and liquid volume were 0.15 g and 150 cm, respectively The metal content was 5 wt.%, BET specific surface area 95 m / g, the mean metal particle size 8.3 nm (XRD), dispersion 40% (H2 chemisorption), the mean catalyst particle size 18.2 pm (Malvern). Catalysts were activated under hydrogen flow (100 cm / min) for 2 h at 400°C prior to the reaction. 

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