PREPARATION OF FINE AMMONIUM PERCHLORATE CRYSTALS BY A"SALTING OUT"PROCESS
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The precipitation of ammonium perchlorate (AP) from methanol solutions of AP by a salting out method has been studied. The organic solvents studied as precipitants were: chloroform, ether, isobutyl alcohol and methylene chloride. The characteristics of the precipitated AP crystals were investigated by means of scanning electron micrograph, X-ray diffraction, differential scanning calorimetry and thermogravimetric analysis. When ether, chloroform and methylene chloride were the precipitants, the product crystals had a particle size less than 5 <I>μ</I>m. On the other hand, the crystals obtained with isobutyl alcohol as the precipitant had a orthorhombic shape and the mean crystal size was larger than 10 <I>μ</I>m. Diffraction angles for AP crystals obtained with isobutyl alcohol as the precipitant coincided with those obtained with other precipitants used in this work, though the intensity in the X-ray diffraction changed.
- JOURNAL OF CHEMICAL ENGINEERING OF JAPAN
JOURNAL OF CHEMICAL ENGINEERING OF JAPAN 28(4), 429-433, 1995-08
The Society of Chemical Engineers, Japan