Mixing segregation

FIG. 23 14 Comp arison of maximiim mixed, segregated, and ping flows, (a) Relative volumes as functions of variance or n, for several reaction orders, (h) Second-order reaction with n = 2 or 3. (c) Second-order, n = 2. (d) Second-order, n = 5. 

Calculated Molecular Weight Distributions. The calculated weight fraction distributions for the micro-mixed, segregated, and micro-mixed reactor with dead-polymer models for Runs 2, 5,... 

Chapter 16 Earliness of Mixing, Segregation, and RTD Thus Eq. 3 becomes... 

N. Sommier, P. Porion, P. Evesque, B. Leclerc, P. Tchoreloff, G. Couarraze, Magnetic resonance imaging investigation of the mixing-segregation process in a pharmaceutical blender, Int. J. Pharm. 222 (2001) 243-258. 

For a low-dose formulation, low concentration of micronized drug substance is mixed with larger particles of excipients to achieve an ordered mix. Although the ordered mix is more homogeneous and stable than a random mix, segregation may still occur in multiple ways 13... 

Quantitative analysis could readily be made in the light of idealized fluidization, to deal with the first two aspects of the mixing/segregation process (Kwauk, 1962,1963b). 

Q, Q2 exchange coefficient in particle mixing-segregation, dimensionless... 

Pretreatment involves analyzing and preparing the waste stream for treatment in the TDU. The key steps involved are analyzing the waste, soil mixing, segregating large particles, and dewatering. 

The statistical description of multiphase flow is developed based on the Boltzmann theory of gases [37, 121, 93, 11, 94, 58, 61]. The fundamental variable is the particle distribution function with an appropriate choice of internal coordinates relevant for the particular problem in question. Most of the multiphase flow modeling work performed so far has focused on isothermal, non-reactive mono-disperse mixtures. However, in chemical reactor engineering the industrial interest lies in multiphase systems that include multiple particle t3q)es and reactive flow mixtures, with their associated effects of mixing, segregation and heat transfer. 

Analysis of correlation length and density fluctuations in pure and solvent-modified SCFs, in particular around the mixture critical curve (P - PJ. Also measurement of the mean nuclei size and microscale mixing segregation (8). 

If the deviations are small then they can be described by the dispersion model (additional dispersive flow is is superimposed on the plug flow) or cell model (cascade of ideal stirred tanks). For larger deviations the calculation of nonideal reactors is generally difficult. A more simply treated special case occurs when the volume elements flowing through the reactor are macroscopically but not microscopically mixed (segregated flow). This case can be solved by the Hofmann-Schoenemann method (see below). 

In this contribution, we describe our recent experimental and theoretical findings on complex coacervate core micelles. We have investigated the co-assembly of several types of oppositely charged ionic-hydrophilic block copolymers into mixed micelles. In particular, we have focused on chain mixing/segregation in the micellar corona as a function of monomer type and (the ratio between the) chain length of the polymer blocks in the corona. Our aim has been to employ co-assembly in such systems as a route towards formation of reversible Janus micelles. These are micelles with a corona that exhibits two distinguishable sides (hemispheres in the case... 

Streaks and spots in clinker Nonhomogeneity of raw mix, segregation of dust in air ducts during transfer to silo or in kiln (Gille and others, 1965)... 

Planetary (pony pan) Open pan/pot Horizontal blending Dusty operation Cross-contamination problem Poor vertical mixing Segregation or nonmixing of components Difficult to validate... 

Naimer, NS, Chiba T, Nienow AW. Parameter estimation for a solids mixing/segregation model for gas fluidized beds. Chem Eng Sci 37 1047-1057, 1982. 

Rice RW, Brainnovich Jr JF. Mixing/segregation in two- and three-dimensional fluidized beds binary systems of equi-density spherical particles. AIChE J 32 7-16, 1986. 

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