Ultrasonic stirring

The ruthenium complex is moderately soluble in methanol. Ultrasonic stirring is employed for complete solution. 

Acyclic tricarbonyl(diene)iron complexes may be prepared by reaction of a 1,3-diene with (1), (2), or (3) either thermally, photochemically, or under the influence of ultrasonic stirring (Scheme 62). Ligand transfer species, such as (benzylideneacetone)Fe(CO)3, (l-aza-1,3-diene)Fe(CO)3, or bis( -cyclooctene)Fe(CO)3 are also useful for the complexation of dienes nnder mUd reaction conditions. The thermal reaction of nnconjugated dienes with (1) generally results in double bond migration... 

The earliest use of a small ultrasonic probe to prepare slurries from coal fly ash directly in the autosampler cups was reported by van Loenen and Weers [13]. They found ultrasonic stirring not to ensure slurry homogeneity during the time required for the autosampler to withdraw each sample aliquot unless the analyte was completely leached. 

Monometallic Pd(5 wt.%)jC and Bi(5 wt.%)IC catalysts the selected carboxylate precursor of palladium or bismuth (see above) was dispersed in the presence of 7.2 g of the activated carbon in 250 ml n-heptane under ultrasonic stirring for 30 min. The hydrocarbon was evaporated very slowly at room temperature under vacuum and the precursor deposited on the support was subsequently decomposed upon heating under nitrogen at 773 K during 18h. 

In any case it is often necessary to apply ultrasonic stirring to destroy agglomerates and to disperse powders optimally prior to and even during the slurry analyses. 

Add a diluted PTFE emulsion to the above mixture, followed by thorough ultrasonic stirring to form a catalyst ink ... 

SEM analysis of the AlCeOs nanoparticles (Aldrich, 99%) showed them to have diameters varying from a few nanometres (<25 nm) to 300 nm. They were added to a hexamethyldisiloxane (HMDSO > 98% grade) solution, purchased from Aldrich. The concentration of nanoparticles was calculated in weight percent. The solutions were homogenised by ultrasonic stirring at room temperature for 30 min. 

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