Spray drying, detergents

Figure 15 Spray-dried detergent production (O) (from Ref. 13).

Spray-dried powders are formulated to give the best overall cleaning performance and flow characteristics at the lowest possible formulation costs. Typical spray-dried detergent formulations are shown in Table 36.6. Slurry preparation is considered to be the single most important factor in spray drying. Control of the raw material order of addition, slurry solids level, slurry temperature, viscosity, and aeration enable manufacturers to deliver the desired final product characteristics. The spray tower itself is simply a contained heat source that removes moisture at a uniform rate dependent upon the quality and the quantity of feed to the dryer. If feed variables are not controlled, variability in the... 

FIGURE 19.7 A typical manufacturing unit for spray dried detergent powders. 

FIGURE 19.8 Schematic drawing of a spray dried detergent nnit. 

FIGURE 19.9 Typical spray dried detergent particles. 

Spray dried detergent granules Surfactant agglomerates Bleaches and bleach activators Enzymes Buffers and fillers Speciality particles... 

The linear alkyl sulfonates can be neutralized with aqueous solutions of base such as NaOH, KOH, NH4OH, or alkanolamines. The sodium salts are used in the formulation process to produce spray-dried detergents... 

Antifoam granules essentially similar to reference [53]. Claims a mix of spray-dried detergent powder + antifoam granule + ethoxylated alcohol granule... 

Spray dried detergents Ethylene W. Germany 2,264,302 1973 Unilever N.V. 

Neutralization of sulfonic acid is similar in the case of either an oleum or a SO3 sulfonation process. The sulfonic acid can be neutralized with aqueous solutions of base that is, KOH, NH4OH, NaOH, or alkanola-mines. The sodium salts are used for formulating spray-dried detergents for household laundry consumption. Ammonium and alkanolamine neutralized salts generally are used in light duty liquid detergents. In general, neutralized salts from oleum sulfonation contain approximately 8 to 10 percent sodium sulfate, where as those from air/SO 3 sulfonation contain only 2 to 3 percent sodium sulfate. 

Spray-dried detergents are manufactured for use in locations where various legislative restrictions may limit phosphate use. Typical formulations are shown in Table 26.3. 

Uses Hydrolrope for liq and spray-dried detergent fomiulalions... 

Chem. Descrip. Potassium toluene sulfonate CAS 30526-22-8 EINECS/ELINCS 240-273-5 Uses Hydrolrope for liq and spray-dried detergent fomiulalions Properties Liq. 

Crodateric CYAP wetting agent, spray washes Cola Fax 3372 Cola Mine CDA Cola Mine CDDA Monamine AD-100 wetting agent, spray-dried detergents... 

Brandli, E. H., R. M. Kelley, Automated determination of alkyl aryl sulfonates in spray-dried detergents by UV absorption, 7. Am. Oil Chem. Soc., 1970,47, 200-202. 

---