Isocel

According to the vendor, the ISOCELL technology can provide in a frustum-shaped block of preselected size the complete isolation and removal of radioactive materials from in situ site conditions. The technology uses lifting and/or glazing to keep wastes contained inside the frozen blocks and to reduce dust and aerosol releases during lifting and mobilization processes. 

The vendor asserts that the advantages of the ISOCELL technology include ... 

The cost for the ISOCELL technology varies depending on site variables such as site size, wastes to be treated at the site, waste treatment method, transportation costs, disposal costs, and other general factors that may affect the costs. An appropriate cost for using the ISOCELL technology can only be determined on a site-by-site basis, considering all factors that affect cost (personal communication Ronald K. Krieg, RKK, Ltd., December 1996). 

The essential features of the Shell Isocel process (2)—the first to reach commercialization—are shown in Figure 3. In this process, the dried butane feed is vaporized and sent... 

The other vapor-phase butane isomerization process, developed cooperatively by the Anglo-Iranian Oil Co. and the Standard Oil Development Co., is somewhat similar to the Isocel process. In the AIOC-Jersey process (18), the reactor is initially filled with bauxite, and aluminum chloride is sublimed into the vaporized feed as necessary to maintain the desired catalyst activity. Upflow of vapor through the reactor is the customary arrangement. Since carry-over of aluminum chloride is not excessive at the usual rates of catalyst addition, about half of the commercial plants employing this process were not equipped with guard chambers. 

A programme of detailed decay-spectroscopic investigations in the region "northwest of 146Gd" is pursued in collaboration with P. Kleinheinz et al. (KFA Jiilich). These experiments, which also use the on-line separator ISOCELE at Orsay and ISOLDE at CERN, cannot be covered in this brief report. It may suffice to mention here the studies of protons and gamma... 

Figure 18. The Oxy plane of linear configurations (above) and the Oyz plane of isoceles configurations in the A-IA2A3 problem. The potential function is deeper for darker gray. The lines cross at the center and at the equilibrium points. The white dashed line is the reaction path, if there were no inertial or nondiagonal kinetic energy effects.

Schedletzky and Glaser, 1995, 1996). This simplified transfer function includes the special cases where = J23 = 0 (two-spin topology Hartmann and Hahn, 1962 Muller and Ernst, 1979 Braunschweiler and Ernst, 1983), (isoceles topology Listerud et al.,... 

The Isocel process developed by the Shell Oil Company was the first isomerization process to reach commercialization and started operation... 

Fiq. 12. Vapor-phase butane isomerization. Shell Isocel process. 

The other vapor-phase butane-isomerization process was developed cooperatively by the Anglo-Iranian Oil Company and the Standard Oil Development Company. It is similar to the Isocel process, but it turns the volatility of aluminum chloride from a liability into an asset. The first plant was put into operation in October, 1942. This process is described (18) by the simplified flow diagram shown in Figure 15. 

Ethylidynetrinickel cluster 1 (NiCp)3CCH3 was prepared for the first time from the reaction of nickelocene with methyllithium, in diethyl ether and THF. 1 sublimes at 60 °C (0.001 Torr), melts without decomposition at 158-160 °C, oxidizes easily in air but does not hydrolyze in water. The mass spectrum shows a parent peak at m/z 396 ( Ni). The C NMR of 1 established the presence of the ethylidyne carbon atom at S 289.3 (s). The molecular structure of 1 is shown on Fig. 1. The nickel framework is best described as an isoceles triangle. The C2 atom of the apical methylidyne group is tilted slightly towards the Ni 1 atom. 

FIGURE 5.2. Assembly of the orbital diauram for an isoceles triangular II3 (C2v) from those ofH2 + H. 

Coathanger die n. A sheet-, or film-extrusion die whose melt-distribution manifold has the obtuse-isoceles outline of a coathanger. This popular die design is said to yield uniform distribution of material across the full width of the extruded web, thus producing sheet of laterally more uniform thickness. Side-fed blow-molding dies and spiral-type dies for blown film may also be spoken as a coathanger dies. 

FIGURE 5,2. Assemtily of the orbital diagtam for an isoceles triangular H3 (Cjy) from those ofHj + H. 

Fig. 72. (C,jH2jNH3)jFe(0H)(S04)j CjH50H H,0 ( ), (C,jH NH3)2Fe(0H)(S04)3 - H,0 (x). FetOHISO, (a). Temperature dependence of l/xj . Full curves calculated for (/) dimer. (2) equilateral triangular (linear) trimer, (3) isoceles triangular trimer, (4) Fisher infinite chain [71C6].

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