Conventional two-stage

CA 65, 15143(1966) [A process for drying AN prills (or of other granular materials) which permits reduced moisture content to as low as 0.1%, is described. Moisture content of not lower than 0.2 to 0.5% has been achieved by using conventional two-stage process. Details of method are given in patent]... 

The treated gas had to meet typical pipeline gas specifications, that is, less than 4 ppm vol. H2S and less than 2.0 vol.% CO2. The add gas liberated is sent to conventional two-stage Claus units followed by a Sulfreen tail gas treating unit. Figure 10.4 illustrates the original amine sweetening units process flow-scheme. There are two identical trains, each equipped with two high-pressure absorbers and two regenerators. 

Advances in the synthesis chemistry and technology allow the single-stage synthesis of DME from synthesis gas, which is also proven to be economically more favorable than the conventional two-stage routes. 

In contrast to the conventional two-stage technology of (7-21) and (7-22), the carbothermic approach to the reduction process (Gibson Weidman, 1963 Wilhelm Mac-Clusky, 1969) is the one-stage technology, which can be described by the only (but strongly endothermic) reaction ... 

Instrumentation for Capillary SFC-MS. The development of fused silica capillary colusms with stabilized stationary phases suitable for SFC presented the opportunity to eliminate the disadvantages of the molecular beam approach. The typical fluid flow rates for 50 ym i.d. columns are in the range of 1-2 1/min (as liquid) this range can be handled by conventional two stage mass spectrometers (as typically configured with chemical ionization capability) without the use of the liquid nitrogen cryo-pumps required for commercial direct liquid introduction LC-MS interfaces (35). 

The conventional two-stage spin and draw process, as shown in Figure 2.18, yields a fully drawn yam with a predominantly a structure. This process converts an undrawn yarn to a draw-textured yarn with a predominant a structure, improved dimensional stability, and dye-fading resistance. 

The lead plant in Nordenham used the conventional two-stage sinter machine-blast furnace process until the development of bath smelting technology in 19%. 

The poly(ether imide)s derived from ether-containing bis(ether anhydride)s (Scheme 2.8) or polyimides (Scheme 2.9) were prepared via a conventional two-stage procedure involving ring-opening polyaddition of the diamines (Tables... 

Conventional two-stage extruders can generally reduce the level of volatiles only a fraction of one percent. For example, for PP/xylene with an initial solvent concentration of 0.3 to 1.0%, the amount of solvent removed by single vent extrusion is about 50%. 

The volatiles are withdrawn through a rotary union at the rear of the screw. This venting was tested in practice on acrylic and was found to perform reliably for extensive periods of time. This process is also used for processing PET powder with conventional two-stage screws. This concept has also been applied to barrier screws. 

Scheme 10.2 Synthesis of poly(ether ester)s by conventional two-stage polycondensation.

FIGURE 3.9 Schematic diagram and simulated ion trajectories for aTOF mass spectrometer (a) with a conventional two-stage mirror, and (b) with the three-stage mirror designed by Short and Todd. (Reprinted with permission from reference 15). 

FIGURE 3.10 Time-of-flight mass spectra for Na ions as a function of m3/ m2 ratio for (a) conventional two-stage configuration, (b) optimal temporal focusing, and (c) overcompensation. (Reprinted with permission from reference 15). 

In the conventional two-stage process, the freshly spun subtow is first fed into cans and later processed on the fiber line. In the single-stage compact process, the freshly spun material is directly processed on the fiber line [56-58]. 

The incorporation of macroheterocyclic compounds and their derivatives in polymer structures leads to the obtaining of polymers with specific behavor upon complex formation [3,11,12]. Polyurethane-semicarbazides comprising crown ether sulfonyl derivatives in the main chain were obtained by a conventional two-stage method [13-16]. The structure of the repeat unit of the resulting crown ether-containing thermoplastic elastomers XXI can be represented as ... 

Polyurethane-semicarbazides and polyurethane-sulfosemicarbazides were obtained by the conventional two-stage synthesis [2] in the presence of a transition metal acetylacetonate the polymers obtained have the following structure... 

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