Spray drying INDEX

Methenamine Spray-dried lactose Fracture Index... 

Table IV gives the Attrition Indexes for the commercial and experimental samples. These values are reported for microspheres that were spray dried before the viscosity of the slurry exceeded 100 cP. The data show, again, that sol age and particle size of the CP alumina affect attrition. Sol age also seems to reduce the influence of the CP-2 as a binder. The Reference (4) has an AI of about 3 which is comparable to the index for CP-2(4). The important point here is that the alumina particles can be incorporated into a standard FCC formula to change catalytic activity without a detrimental effect on attrition resistance.

A patent owned by E.I. du Pont (Crank and Kerr, 1999) described procedures for preparing isoflavone-rich soy protein products with desirable flavor and functionality. A low-stachyose soybean variety was dehulled, flaked (0.25-0.6 mm), defatted by hexane and desolventized by vacuum to yield a 90 PDI (protein dispersibility index) of soymeal. A water extraction at 80°C was carried out for 6-10 min, and it was then cooled to 40-45°C by adding more water. The extract after centrifugation was neutralized and spray-dried. The product contained 2.5 mg/g isoflavone. 

There are several other methods that a flavor house may use to determine moisture content. They include microwave or infrared ovens (may be used in a spray drying operation for rapid analysis for process control) and refractive index (liquid... 

The attrition of the composite FCC particles was measured using the Davison Attrition Test. Higher values of the index indicate weaker particles that attrit easier. A series of catalysts were prepared by spray drying the USY zeolites with one of the two sols and the attrition of the composite was measured. The results are shown in Figure 4. 

Uses Defoamer for solv.-based coatings, fast drying industrial and decorative finishes based on alkyd resins, air-drying acrylic, vinyl, and chlorinated polymers, airless spray coatings Properties Colorless clear Iiq. dens. 0.94-0.96 g/cm (20 c) flash pt. 42 C ref. index 1.445-1.455 Use Level 0.1-1.0% (on total formulation)... 

The principal of the dry photocopier is illustrated in Fig. 22.4. A cylinder is covered with a material such as arsenic selenide, which is photoconductive because of trapped carriers of charge (see Index if necessary). In the dark, a high voltage is used to spray electrons onto the cylinder, and they stay there in the form of a static electricity charge, because the material is an insulator in the dark (see the first diagram in the figure). 

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