Semi-batch precipitations

Wachi and Jones (1991b) used a gas-liquid flat interface reactor as a semi-batch precipitation cell for the experimental measurement of calcium carbonate precipitation, as shown in Figure 8.15. 

Yagi, H., 1988. Semi-batch precipitation accompanying gas-liquid precipitation. Chemical Engineering Communications, 65, 109-119. 

Phillips, R., S. Rohani, and J. Baldgya (1999). Micromixing in a single-feed semi-batch precipitation process. AIChE J. 45, 82-92. 

Figure 6.9 Effect of feed configuration—see Figure 6.8—on supersaturation profile in semi-batch precipitation of BaS04 (after Baldyga et al. 1995). Configuration I—after 1/3 feed added configuration II—for initial period of feeding.

Semi-Batch Precipitator. Assuming constant feed rate and no outflow, in addition to the assumptions made for the MSMPR precipitator, the PBE for a semi-batch precipitator is as follows (Kim and Tarbell 1991)... 

Finally, we touch upon selected practical aspects of typical precipitation operations, using continuous MSMPR and tubular precipitators, and a semi-batch precipitator as illustrative examples. 

The aim of this work is to study the semi-batch precipitation of the polymer poly (2,6-dimethyl-1,4-phenylene ether) from a solution in toluene, using high-pressure CO2 as an anti-solvent. The influence of the process conditions on the degree of crystallinity, and the particle size and size distribution has been determined. 

Zauner, R. and Jones, A.G. (2000b) Scale-up of continuous and semi-batch precipitation processes. Industrial and Engineering Chemistry Research, 39, 2392-2403. 

EE Wubbolts, C Kersch, V RosmaUen. Semi-batch precipitation of acetaminophen from ethanol with liquid carbon dioxide at a constant pressnre. In M PerruL P Subra, eds. Proceedings of the 5th Meeting on Snpercritical Fluids, Nice, France, 1998, Vol. 1. International Society for the Advancement of Supercritical Fluids, pp. 249— 256. 

Schlomach J, Kind M (2(X)4) Investigations on the semi-batch precipitation of silica. 

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