초록 ▼

An adsorption arrangement in combination with a catalytic hydrocarbon conversion process suspends non-hydrocarbon materials that act to enhance the operation of the conversion zone by using an adsorption zone arrangement to keep the compounds in recirculation about the reaction zone and integrates t

An adsorption arrangement in combination with a catalytic hydrocarbon conversion process suspends non-hydrocarbon materials that act to enhance the operation of the conversion zone by using an adsorption zone arrangement to keep the compounds in recirculation about the reaction zone and integrates the adsorption zone arrangement with a chiller to increase the recovery of C.sub.4 hydrocarbons. The process of this invention is particularly useful for the isomerization of hydrocarbons wherein the adsorption zone arrangement operates to maintain chloride compounds in the reaction zone and to prevent contamination of product streams with the chloride compounds while increasing the recovery of C.sub.4 hydrocarbons. This invention can be used in combination with traditional adsorptive methods of removing contaminant from feedstreams that enter reaction zones.

대표청구항 ▼

[ We claim:] [8.] A process for the isomerization of a hydrocarbon stream containing C.sub.4 hydrocarbons with a chloride promoted catalyst, said process comprising:(a) contacting a first stream comprising C.sub.4 hydrocarbons with a chloride promoted catalyst in an isomerization reaction zone at is

[ We claim:] [8.] A process for the isomerization of a hydrocarbon stream containing C.sub.4 hydrocarbons with a chloride promoted catalyst, said process comprising:(a) contacting a first stream comprising C.sub.4 hydrocarbons with a chloride promoted catalyst in an isomerization reaction zone at isomerization conditions to convert normal hydrocarbons to branched hydrocarbons and produce an isomerization zone effluent stream comprising C.sub.3 and C.sub.4 hydrocarbons and a chloride compound;(b) separating said isomerization zone effluent stream into a liquid phase and into a gaseous phase containing C.sub.3 hydrocarbon, C.sub.4 hydrocarbon and a chloride compound;(c) passing a gaseous input stream comprising at least a portion of said gaseous phase to an adsorption zone containing an adsorbent having adsorption capacity for the adsorption of said chloride compound and contacting said gaseous input stream with said adsorbent at adsorption conditions, adsorbing said chloride compound on said adsorbent and producing a gaseous effluent stream having a reduced concentration of said chloride compound relative to said gaseous input stream and an adsorbent containing said chloride compound;(d) chilling at least a portion of said gaseous effluent stream by indirect heat exchange to a temperature of -20.degree. to 40.degree. F. with at least a portion of a refrigerant stream to produce a chilled gaseous effluent stream;(e) separating at least a portion of said chilled gaseous effluent into a light gas stream comprising C.sub.3 hydrocarbons and a separator bottoms stream comprising C.sub.4 hydrocarbons;(f) compressing said refrigerant stream and indirectly contacting the compressed refrigerant with a desorption stream comprising C.sub.4 hydrocarbons to cool said compressed refrigerant and heat said desorption stream and at least partially vaporizing the desorption stream;(g) contacting said adsorbent containing said chloride compounds at desorption conditions with at least a portion of the heated desorption stream to desorb chloride compounds from said adsorbent and to produce an additive stream comprising said chloride compounds; and,(h) passing at least a portion of said additive stream to said isomerization reaction zone.