Effect of Stirring

PloB, R. and Mersmann, A., 1989. A New Model of the Effect of Stirring Intensity on the Rate of Secondary Nucleation. Chemical Engineering Technology, 12, 137-146. 

Fig. 1.63 Effect of stirring rate on the aluminium-mild steel couple in 1 - 0 n NaCl at 25°C. Equal areas (20 cm ) of aluminium and steel coupled together for 24 h (after Pryor and...

Extraction rates of zinc (II) and nickel (II) with ethyldithizone, butyldithizone, or hexyldithizone in an organic phase (chloroform, CCI4, w-heptane, or benzene) showed a first-order dependence on the ligand and metal ion concentration and an inverse-first-order dependence on the proton concentration. The results were explained by chelate formation in the interfacial region [59]. The effects of stirring on the distribution equili-... 

FIG. 9 Extraction rate profiles of the ion-association extraction of Fe(II) with phen and its dimethyl (DMP) and diphenyl (DPP) derivatives into chloroform in the presence of 0.1 M NaC104. Effect of stirring (4700 rpm) indicates the interfacial adsorption of the complexes. 

For the gas-lift, side-by-side diffusion cell system (Hidalgo et al., 1991) in which the effects of stirring on the ABLs in the donor and receiver chambers are equivalent,... 

Table 1 Effect of stirring rate on the initial rate of hydrogen uptake (mmoles H2/mmole Rh/min) in the hydrogenation of 1-hexeneover AHC-Wilk.

Figure 1 Effect of stirring speed on the rate of hydrogenation of DMIT over AHC-2. 5000 TON each reaction, ee s = 95-97%. Reactions run at 50° and 50 psig.

It is clearly connected with the effect of stirring and the presence of a nucleation regulator [15]. It is also related to the microwave power. It has been shown that the effect is eliminated when the experiments are performed on well-stirred mixtures [16, 17] using low microwave power. It could be essentially a consequence of the absence of stirring, i. e. in closed vessels inside a domestic microwave oven. 

Effect of Stirring. The rather small effect of tube flow and slow stirring on the specific resistance results in Figure 5 was unexpected and has been checked by a series of trials in which a kaolin suspension was subjected to various periods of slow stirring, following polymer addition and rapid mixing. 

Fig. 26.2 Effect of stirring time on the adsorption of lead Cp 2. 50 pg/mL, amount of resin 0.5 g, pH 4...

Hanif, N., Anderson, M.W., Alfredsson, V., and Terasaki, 0. (2000) The effect of stirring on the synthesis of intergrowths of zeolite Y polymorphs. Phys. Chem. Chem. Phys., 1, 3349-3357. 

A. Kouchi, A. Tsuchiyama, and I. Sunagawa, Effect of stirring on crystallization kinetics of basalt texture and element partitioning, Contrib. Mineral. Petrol, 93,1986,429-38... 

Table 2—Effect of stirring rate on nifedipine microsphere content and size...

Kirst, E. 1980A. Lipolytic process in milk and milk products. Review of literature and study of effects of stirring and pumping on milk fat. Die Nahrung 24, 569-576. (German). 

Lawrence, A. J. 1959. Syneresis of rennet curd. Part II. Effect of stirring and of the volume of whey. Aust. J. Dairy Technol. 14, 169-172. 

Madden and Damerell carried out their study in a 1.5-liter vessel of stainless steel internally coated with Teflon to prevent wetting by the aqueous dispersed phase. This reactor was stirred by means of a turbine and equipped with wall baffles. They investigated the effect of stirring rate (corresponding with a power input from 0.25 to 2 hp./m.8) and the effect of dispersed phase fraction from 0.0014 to 0.011. The interaction rate co< they found varied from 0.04 to 0.5 sec.-1 (see Fig. 25). 

Also, the effect of stirring on pH fluctuation should be checked for pH stat determinations. 

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