“…Isomerization during olefin preparation by dehydration reactions has been reported frequently,1,-16 while many cases have been reported where little or no isomerization occurred. [17][18][19][20] Asinger16 found general isomerization of the double bond all along the carbon chain when dodecanol was dehydrated over alumina at 370-380°or with metaphosphoric acid. Isomerization was observed with alumina at temperatures as low as 250°where the dehydration reaction was incomplete.…”
“…Isomerization during olefin preparation by dehydration reactions has been reported frequently,1,-16 while many cases have been reported where little or no isomerization occurred. [17][18][19][20] Asinger16 found general isomerization of the double bond all along the carbon chain when dodecanol was dehydrated over alumina at 370-380°or with metaphosphoric acid. Isomerization was observed with alumina at temperatures as low as 250°where the dehydration reaction was incomplete.…”
“…of mercury), (2) 22-hour period at 302°C. and constant flow rate, (3) four feed rates at 302°C ., (4) four feed rates at 318 °C., (5) four feed rates at 339°C ., (6) four feed rates at 358°C ., (7) two feed rates at 339°C ., (8) two feed rates at 318°C ., and (9) two feed rates at 302°C. Each condition of temperature and feed rate was maintained for 4 hours.…”
T h e results obtained on dehydrating 1-dodecanol at varying feed rates 0% er alumina at pressures of 40,160, and 320 mm. of mercury absolute and temperatures of 302', 318 ', 339 O, and 358" C. are reported. Higher temperatures
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