C - Chemistry – Metallurgy – 01 – G
Patent
C - Chemistry, Metallurgy
01
G
C01G 45/02 (2006.01)
Patent
CA 2543645
A process for the treatment of a light cracked naphtha is disclosed wherein the light cracked naphtha is first subjected to thioetherification and fractionation into two boiling fractions. The lower boiling fraction is removed as overheads for later recombination with the product and the higher boiling fraction is combined with a heavy cracked naphtha and subjected to simultaneous hydrodesulfurization and fractionation to separate the higher boiling fraction from the heavy cracked naphtha which is recycled. The recycled heavy cracked naphtha is eventually desulfurized and hydrogenated to produce a clean solvent which washes the catalyst and extends catalyst life.
L'invention concerne un procédé de traitement de naphta léger de craquage lequel est d'abord soumis à la thioéthérification et au fractionnement pour obtenir deux fractions d'ébullition. La fraction d'ébullition inférieure est extraite comme distillat de tête pour être recombinée ultérieurement avec le produit, la fraction supérieure étant combinée avec un naphta lourd de craquage et soumise à des opérations simultanées d'hydrodésulfuration et de fractionnement pour séparer la fraction d'ébullition supérieure du naphta lourd de craquage, lequel est soumis au recyclage. Le naphta lourd de craquage recyclé est éventuellement désulfuré et hydrogéné pour obtenir un solvant propre qui lave le catalyseur et prolonge la durée de vie du catalyseur.
Podrebarac Gary G.
Shorey Scott W.
Som Manoj
Catalytic Distillation Technologies
Ogilvy Renault Llp/s.e.n.c.r.l.,s.r.l.
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