Monomethyl paraffin adsorptive separation process

C - Chemistry – Metallurgy – 10 – G

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C10G 25/08 (2006.01) C07C 7/13 (2006.01)

Patent

CA 2462997

The amount of the adsorbent needed to recover a set quantity of monomethyl branched C10 - C15 paraffins from a mixture comprising normal paraffins and other nonnormal hydrocarbons such as di-isoparaffins, di-isoolefins, naphthenes and aromatics by simulated moving bed adsorptive separation is reduced by adjusting three operating factors: percentage recovery of the paraffin, operating temperature and cycle time. This reduces the capital cost of the process. The recovered monomethyl hydrocarbons may be used to form a monomethyl branched alkylaromatic hydrocarbon useful as a detergent precursor.

Pour réduire la quantité d'adsorbant requis pour récupérer une quantité déterminée de paraffines monométhyliques ramifiées C¿10? - C¿15? dans un mélange comprenant des paraffines normales et d'autres hydrocarbures non normaux, tels que des di-isoparaffines, des di-isooléfines, des naphtènes et des aromates au moyen de procédés de séparation par adsorption à lit mobile simulé, on règle trois facteurs de fonctionnement : le pourcentage de récupération de la paraffine, la température de fonctionnement et la durée totale du cycle. On réduit ainsi le coût en capital du procédé. Les hydrocarbures monométhyliques récupérés peuvent servir à former un hydrocarbure alkylaromatique ramifié monométhylique convenant comme précurseur de détergent.

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