By F. Asinger (Auth.)
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Additional resources for Mono-Olefins. Chemistry and Technology
Example text
Table 88 gives a summary of the best figures at present available for the dissociation energies of C—Η and C—C bonds [9J. T A B L E 88. Latest Figures for Dissociation Energies AH°0 kcal/Mol Reaction CH 4 - > CH 3 + Η 101-102 CH 3 CH 2 CH - > CH 2 + Η - > CH - f Η -> C + Η 87? ] 1 2 3 - 1 2 4 ? \ The sum must be 2 1 0 - 1 1 80 > C 2H e - > C 2H 5 + Η C 2H 6 —> C 2H 4 -f- Η 97 \ j The sum must be 134 C 2H 4 - > C 2H 3 4" Η C 2H 3 - > C 2H 2 -f- Η ^39 } ^ e s um m u s e C 2H 2 —> C 2H - j - Η C 2H —> C 2 -f- H 132 ?
Analysis of the Synthesis Products obtained in the Slurry-phase Process (figures in % by weight) % in the fraction concerned Fraction Up to 50 °C 50-100° 100-150° 150-200° 200-250° 250-300° 300-350° Above 350° M4 % ol tne total oil 4 20 16 10 12 10 8 20 · Alcohols Olefins Paraffins 0 5 15 12 12 10 5 85 83 67 62 63 54 45 — 12 7 11 20 17 25 38 — — Esters and acids 3 5 7 6 8 11 12 — 50 MONO-OLEFINS, CHEMISTRY AND TECHNOLOGY Table 8 2 shows the percentage composition of the synthesis products of the American process using a fluidized catalyst (Hydrocol process), while Table 8 3 gives the content of olefins in narrow fractions with rising boiling ranges.
T A B L E 69. % Fraction Aromatics Olefins 0-0 10-2 29-0 361 40-3 590 56-9 45-0 23-8 171 C 5- 6 0 ° 60-95° 95-120° 120-150° 150-176° T A B L E 70. Distribution of the Olefins in a Gas-phase Cracked Gasoline Fraction 0 - 45° 4 5 - 64° 6 4 - 95° 95-125° 125-150° 150-180° Naphthenes and paraffins 41-0 32-9 26-0 40-1 42-6 T A B L E 71. % 24-0 33-2 43-2 35-7 29-9 29-8 Below 60° 6 0 - 95° 95-122° 122-150° 150-200° 53 33 29 29 25 The composition of each single fraction is extraordinarily complex, and the isolation of any individual higher olefin of industrial interest from a suitable cracked gasoline is almost impossible at the present time.