Liquid methanol

Problem 2.17 Classify the following solvents (a) (CH3)2S=0, dimethyl sulfoxide (b) CCl4, carbon tetrachloride (c) C6H6, benzene (d) HCN(CH3)2 Dimethylformamide (e) CH3OH, methanol (/) liquid NH3. ... 

DegussaAG Tertiary amyl methyl ether (TAME) Amylene containing hydrocarbons/methanol Liquid-phase catalytic synthesis, high selectivity, energy efficient NA NA... 

Degussa AG Dimethyl terephthalate (DMT) p-Xylene, oxygen, methanol Liquid oxidation with homogeneous catalysis, mild-noncorrosive conditions 30 NA... 

FIGURE 3-26 Spectra of methanol liquid, dilute solution, and vapor. Dilute solution, 0.1 M in CCI4 or CS2. [From Stuart and Sutherland, J, Chem. Phys. 24, 561 (1956).]... 

LPG. See gas, liquified petroleum LPIE. See ion exchange, liquid-phase LPM. See methanol, low-pressure LPMEOH. See coal, -to-methanol, liquid-phase methanol LPST. See turbine, low-pressure steam LPT. See turbine, low-pressure LTFT. See Fischer-Tropsch (FT) synthesis, low-temperature... 

Supercritical fluid extraction using CO, with methanol liquid-liquid extraction of SFE eluate with n-hexane after complexation with DDTC Derivatisation by addition of propylmagnesium chloride Separation by CGC detection by MS (Lab. 04)... 

Sorv of Hydn enation. Catalytic hydrogenation is used extensively both in the laboratory and in industrial processes. In the laboratory it is used in chemical syntheses, as a basis for many analytical procedures, and as a research tool in the identification and determination of the structure of organic compounds. In industry, large quantities of hydrogen are consumed in the manufacture of ammonia, methanol, liquid fuels, oxygenated... 

The mixture in trap I is stirred for 3-4 hr at - 20 to - 30°, causing the excess bromine to react with the mercury. This process is continued until a pale yellow liquid remains. A highly pure product is obtained by fractional condensation by using traps at -30° (methanol/liquid N2), -78°, and - 196°. The pure BrNSFj (24.7 g, 0.15 mole 70%) is found in the trap at -78°. 

In contrast to the electrolyte membranes mentioned above, PSSA-PVDF membranes have high conductivities at low temperatures (25-90 °C), low methanol permeability rates, and have been successfully operated in low temperature direct methanol, liquid-feed fuel ceils. In the present study, the methanol permeability and ionic conductivity of PSSA-PVDF membranes have... 

Bis(trifluoroacetoxy)iodo]perfluoroalkanes are effective recyclable reagents for the oxidation of aliphatic and benzylic secondary alcohols 119 to ketones 120 in the presence of KBr in aqueous solution (Scheme 5.38) [103]. The reduced form of the reagent, the respective iodoperfluoroalkanes 118, can be efficiently isolated from the reaction mixture in 96-98% yield by adding three to five volumes of methanol and separating the resulting fluorous/methanolic liquid/liquid biphasic system. The recovered iodoperfluoroalkanes 118 can be reoxidized to reagents 116 and reused [103]. 

C, the amount of sodium carbonate is 4.0-5.5 % (pH should be kept at 6.5-7.5 during its addition), reaction time is 4.5-5.5 h, catalyst is tetrabutylam-monium bromide, the amount of catalyst is 0.5 %, the water and methanol liquid after nitromethane distillation is reused, the yield is 79.8 %, and the purity is >99.9 % (Table 4.7). 

Argyropoulos P, Scott K, Taama WM (2000) Hydrodynamic modeling of direct methanol liquid feed fuel cell stacks. J Appl Electrochem 30 899-913... 

A9. In the vapor-liquid equilibrium data for methanol-water, if the methanol vapor mole fraction is 0.60, what is the methanol liquid mole fraction ... 

It has been shown in recent years that definitive solvation numbers may be obtained for certain metal cations in water, methanol , liquid ammonia , N, N-dimethylformamide 2 and dimethyl sulphoxide by use of NMR-techniques. For the Mg+ in liquid ammonia the unexpected solvation number of 5 has been found . In methanol six solvent molecules were found associated, with each magnesium ion in the primary solvation sphere. Since only one Lorentzian signal was observed for bound ammonia, the exchange between non equivalent ammonias must be rapid. The most important factor in the formation of the pentaammoniated magnesium ion has been assumed to be rather strong ion pairing, which is known to occur in liquid ammonia . 

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