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Agglomeration agitation

The thin dispersion rapidly thickens into a gelled matrix and coagulates into a water-repellent agglomeration that doats on the aqueous medium as the mechanical agitation is continued. The agglomeration is dried gentiy shearing must be avoided. [Pg.350]

Four principal mechanisms are used to bring fine particles together into larger agglomerates agglomeration by tumbling and other agitation... [Pg.111]

Suspension Polymerization. Suspension polymerization is carried out in small droplets of monomer suspended in water. The monomer is first finely dispersed in water by vigorous agitation. Suspension stabiUzers act to minimize coalescence of droplets by forming a coating at the monomer—water interface. The hydrophobic—hydrophilic properties of the suspension stabiLizers ate key to resin properties and grain agglomeration (89). [Pg.502]

A successful variation of oil agglomeration was used for removal and dewatering of soot from a 1—3% soflds suspension consisting of <5 — fim particles in refinery process waters (Fig. 8). Heavy oil was added to the dilute slurry and intensely agitated in a multistage mixer. The soot agglomerated with the oil to form 3—5 mm pellets that were easily screened from the water (95). The pellets contained only 5—10% water. The process was modified to recover very fine clean coal, and it produced highly uniform, hard, spherical pellets 1—2 mm in diameter. [Pg.24]

Butyl slurry at 25—35 wt % mbber continuously overflows from the reactor through a transferline to an agitated flash dmm operating at 140—160 kPa (1.4—1.6 atm) and 55—70°C. Steam and hot water are mixed with the slurry in a nozzle as it enters the dmm to vaporize methyl chloride and unreacted monomers that pass overhead to a recovery system. The vapor stream is compressed, dried over alumina, and fractionated to yield a recycle stream of methyl chloride and isobutylene. Pure methyl chloride is recovered for the coinitiator (AlCl ) preparation. In the flash dmm, the polymer agglomerates as a coarse cmmb in water. Metal stearate, eg, aluminum, calcium, or zinc stearate, is added to control the cmmb size. Other additives, such as antioxidants, can also be introduced at this point. The polymer cmmb at 8—12 wt % in water flows from the flash dmm to a stripping vessel operated under high vacuum to... [Pg.482]

Mechanical interlocking of particles may occur during the agitation or compression of, for example, fibrous particles, but it is probably only a minor contributor to agglomerate strength in most cases. [Pg.1878]

FIG. 20-71 Classification of agglomeration processes by agitation intensity and compaction pressure. Relative density is with respect to primary particle density and equals (1 — e) where e is the solid volume fraction. Reprinted from Granulation and Coating Technologies for High-Value-Added Industties, Ennis and Litster (1996) with permission of E G Associates. All rights reserved. [Pg.1884]

Pai+icle size enlargement equipment can be classified into several groups, with advantages, disadvantages, and applications summarized in Table 20-36. Comparisons of bed-agitation intensity, compaction pressures, and product bulk density for selected agglomeration processes are highlighted above in Fig. 20-71. [Pg.1891]

Diffusion filtration is another contributor to the process of sand filtration. Diffusion in this case is that of Brownian motion obtained by thermal agitation forces. This compliments the mechanism in sand filtration. Diffusion increases the contact probability between the particles themselves as well as between the latter and the filter mass. This effect occurs both in water in motion and in stagnant water, and is quite important in the mechanisms of agglomeration of particles (e.g., flocculation). [Pg.252]


See other pages where Agglomeration agitation is mentioned: [Pg.10]    [Pg.20]    [Pg.513]    [Pg.525]    [Pg.171]    [Pg.112]    [Pg.112]    [Pg.112]    [Pg.112]    [Pg.114]    [Pg.114]    [Pg.121]    [Pg.122]    [Pg.165]    [Pg.276]    [Pg.274]    [Pg.255]    [Pg.347]    [Pg.538]    [Pg.24]    [Pg.146]    [Pg.1213]    [Pg.1643]    [Pg.1768]    [Pg.1874]    [Pg.1875]    [Pg.1875]    [Pg.1877]    [Pg.1878]    [Pg.1882]    [Pg.1888]    [Pg.1894]    [Pg.1895]    [Pg.1899]    [Pg.404]    [Pg.222]    [Pg.63]    [Pg.155]    [Pg.160]    [Pg.174]    [Pg.178]    [Pg.188]   


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Agglomerate Agglomeration

Agglomeration

Agglomerator

Agglomerization

Agitation

Agitators

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