Ethane nonreactivity

In another study, the [MoOJ+ (x = 1-3) ions have been reacted with methane, ethane, benzene, and toluene (184). Only [Mo03]+ reacted with methane producing [Mo03H]+. This study confirmed the earlier nonreactivity of [MoO]+ and [Mo02]+. The reaction of [Mo03]+ with ethane was also different producing three products. 

Tetrabromobisphenol A is used in epoxy resins especially for glass fiber reinforced used in printed circuit board. Nonreactive compounds such as tetrabromophatalate ester, bis(tribromophenoxy) ethane, and decabromodiphenyl ether are also used. The use of synergists, such as antimony oxide, reduces the quantity of brominated flame retardant necessary but decreases the electrical properties required. 

It was shown that in KEP-2 solutions in equimolar mixtures of PPG and PTMG containing 7.5 x 10 and 1.5 x lO surfactant mole fractions the presence of surfactant does not influence the OH group band. At other siufactant concentrations the normal reduction of the band maximum to less than 3460-3480 cm is observed. In addition, at these surfactant contents the band at 3590cm disappears, i.e., the spectral profile contoiu changes. The 3590 cm band characterizes intramolecular hydrogen bonding in five-element cycles, which are nonreactive in uncatalyzed reactions of m-ethane formation. A similar influence of KEP-2 is observed in pure PPG. 

In the short term the choice of ethanol instead of methanol is obvious as bioethanol is available on a large scale today while there is hardly any production of biomethanol. Another advantage is that the composition of the crude ethylene flow from the reactor is much simpler than that obtained by dehydration of methanol. Mainly it contains water and ethylene with some nonreacted ethanol and minor traces of other substances. Consequently, there is no need for distillation equipment leading to a lower investment. Table 6.1 gives the composition of the crude ethylene stream from the reactor and the composition after water washing, compression and cooling as stated in Table II in the Braskem patent [29], The ethylene to be sent for flnal purification is approximately 99.4%, with ethane (0.15%) and butene-1 (0.27%) as the most abundant by-products. 

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