Aluminum doping reaction with

GLC results confirmed the presence of very slightly depressed levels of NPA after distillation in experiments 1-3 (Table 2). Analysis of experiment 4 by GLC was complicated, however, due to the hexanes introduced with TEA, which is used as a 25% solution in hexanes. The column used in the GLC analysis was the non-polar DC-200 (15%) on a Chromosorb P solid support. The more polar n-propyl alcohol elutes just prior to the elution of the non-polar (but lower boiling) hexane peak. The "hexane peak" is actually two peaks, probably corresponding to two structural isomers. The only problem with peak overlap occurs with the hexane peaks and an impurity intrinsic to Rohm and Haas MMA, possibly a reaction by product from the acetone-cyanohydrin process (ACH). Chromatogram (A) of Figure 3 shows the 1% NPA doped MMA prior to reaction with tri n-octyl aluminum (TOA). The peaks of interest are the air... 

The catalytic system used in the Pacol process is either platinum or platinum/ rhenium-doped aluminum oxide which is partially poisoned with tin or sulfur and alkalinized with an alkali base. The latter modification of the catalyst system hinders the formation of large quantities of diolefins and aromatics. The activities of the UOP in the area of catalyst development led to the documentation of 29 patents between 1970 and 1987 (Table 6). Contact DeH-5, used between 1970 and 1982, already produced good results. The reaction product consisted of about 90% /z-monoolefins. On account of the not inconsiderable content of byproducts (4% diolefins and 3% aromatics) and the relatively short lifetime, the economics of the contact had to be improved. Each diolefin molecule binds in the alkylation two benzene molecules to form di-phenylalkanes or rearranges with the benzene to indane and tetralin derivatives the aromatics, formed during the dehydrogenation, also rearrange to form undesirable byproducts. 

Looking for new anodic reactions, we first tried silicon/aluminum-alloys and silicon, doped with traces of different metals. However, the easily oxidizable components again formed metal salts, whereas the silicon remained unchanged. 

Molten Carbonate Fuel Cell The electrolyte in the MCFC is a mixture of lithium/potassium or lithium/sodium carbonates, retained in a ceramic matrix of lithium aluminate. The carbonate salts melt at about 773 K (932°F), allowing the cell to be operated in the 873 to 973 K (1112 to 1292°F) range. Platinum is no longer needed as an electrocatalyst because the reactions are fast at these temperatures. The anode in MCFCs is porous nickel metal with a few percent of chromium or aluminum to improve the mechanical properties. The cathode material is hthium-doped nickel oxide. 

The products of the reactions of silanetriols with gallium [41] and indium alkyls [42] are very similar to those obtained from aluminum alkyls described above. The interest in Ga containing siloxanes stems from the known catalytic activity of Ga-doped zeolites in the dehydrogenation reactions of alkanes. The reactions of silanetriols 15 and 16 with GaMej or InMes in refluxing hexane/1,4-dioxane lead to the cubic Ga/In siloxanes [RSi03M-THF]4 (M = Ga 38, 39 In 40, 41), respectively. In the resulting products, the Ga and In centers are coordinated to a dioxane solvent molecule These compounds have a very similar structure to that of aluminosiloxanes 30-33 shown in Scheme 7. 

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