Conventional Mixing

An experimental shock gel process using supercritical CO2 was explored in the late 1990s by Nauflett and Farncomb in an effort to reduce solvent use, concomitant emissions of VOC and danger of fire [10]. 

Even though this process does overcome the use of highly flammable and neurotoxic -hexane, it did not prove cost efficient and was never realized at large scale (B.E. Douda, personal communication). 

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Considerable work has also been conducted to try to find thermoplastic elastomers that can be used to simplify processing by enabling dry blending and melt casting instead of the conventional mixing and curing process (see Elastomers, synthetic). 

In addition to the conventional mixed acids commonly used to produce DNT, a mixture of NO2 and H2SO4 (8), a mixture of NO2 and oxygen (9), and just HNO (10) can also be used. TerephthaUc acid and certain substituted aromatics are more amenable to nitrations using HNO, as compared to those using mixed acids. For compounds that are easily nitratable, acetic acid and acetic anhydride are sometimes added to nitric acid (qv). Acetyl nitrate, which is a nitrating agent, is produced as an intermediate as follows ... 

The equilibrium binding constant for this 1 1 association is Xu = ki/lLi. The Xu values were measured spectrophotometrically, and the rate constants were determined by the T-jump method (independently of the X,j values), except for substrate No. 6, which could be studied by a conventional mixing technique. Perhaps the most striking feature of these data is the great variability of the rate constants with structure compared with the relative insensitivity of the equilibrium constants. This can be accounted for if the substrate must undergo desolvation before it enters the ligand cavity and then is largely resolvated in the final inclusion complex. ... 

All other devices showed only the increasing part of such a dependence, i.e. the highest performance measured was obtained at the longest residence time [5], The best conversions with the interdigital micro and caterpillar mini mixers (-78 and -70%, respectively) still exceed considerably the performance of a conventional mixing tee (1 mm inner diameter). 

In the production of foundry sand concrete, conventional mixing, placing, and curing are easily referable. 

CZ-O is a conventional mixed oxide prepared by hydrolysis of Zr0(N03)2 with an aqueous ammonia solution in the presence of a fine ceria powder. CZ-R was obtained by a reducing treatment in CO at 1200°C while CZ-D was prepared by high-energy ball... 

This section deals briefly with classical methods based on conventional mixing of the sample and reagents such as the batch mode and low-pressure flow mixing methods, as well as the use of CL detection in continuous separation techniques such as liquid chromatography and capillary electrophoresis for comparison with the unconventional mixing mode. 

Halberg, N., Kristensen, E. S. and I. S. Kristen (1995). Nitrogen Turnover on Organic and Conventional Mixed Farms. Journal of Agricultural and Environmental Ethichs 8 (1) 30-51. 

Tyrann-M/E represents a new highly anisotropic class of microfiltration membrane with permeability and dirt holding characteristics which are superior to those of both noncellulosic and conventional mixed ester membranes and with flexibility and thermal stability which are significantly greater than those of conventional membranes. 

Mixed acid. The nitrating acid is a conventional mixed acid, and spent acid is added in such a quantity that the HN03 content is 26.5-27.5% HN03 and the water content 9.5-10.0%. This water content is below the limit which may cause incomplete nitration. The ratio spent add mixed acid is 1.6-1.75. 

Figures 2, 3 and 4 illustrate the differences between conventional mixed feed, staged and power-feed copolymers whose average composition is 50/50 ethyl acrylate/styrene. In the case of the staged polymerization, all the ethyl acrylate was fed first followed by the styrene. The power-feed copolymer was prepared with ethyl acrylate linearly increasing as a function of time, i.e., x = 1.0, = 0.

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