Process and apparatus for alkylating and hydrogenating a light cycle oil

Abstract

One exemplary embodiment can be a process for alkylating and hydrogenating a light cycle oil. The process can include passing the light cycle oil, one or more C2-C6 alkenes, and hydrogen through a reaction vessel containing an alkylation zone and a hydrogenation zone. Generally, the hydrogen is at least partially comprised from a hydrocarbon product stream from a fluid catalytic cracking zone.

1 . A process for alkylating and hydrogenating a light cycle oil comprising passing the light cycle oil, one or more C2-C6 alkenes, and hydrogen through a reaction vessel containing an alkylation zone and a hydrogenation zone wherein the hydrogen is at least partially comprised from a hydrocarbon product stream from a fluid catalytic cracking zone. 
     
     
         2 . The process according to  claim 1 , wherein the light cycle oil passes through the alkylation zone and then the hydrogenation zone. 
     
     
         3 . The process according to  claim 1 , further comprising passing the hydrocarbon product stream from the fluid catalytic cracking zone to a fractionation zone providing a light naphtha stream and the light cycle oil. 
     
     
         4 . The process according to  claim 3 , further comprising separating and compressing at least a portion of the light naphtha stream to provide the hydrogen to the reaction vessel. 
     
     
         5 . The process according to  claim 1 , wherein the alkylation zone contains a catalyst comprising a zeolite comprising at least one of a FAU zeolite, a beta zeolite, a ZSM-5 zeolite, an MWW zeolite, and an UZM-8 zeolite, and the hydrogenation zone contains a catalyst comprising a support and at least one element of group 5, group 6, or groups 8-10 of the periodic table. 
     
     
         6 . The process according to  claim 5 , wherein the at least one element of group 5 comprises vanadium, the at least one element of group 6 comprises at least one chromium, molybdenum, and tungsten; and the at least one element of groups 8-10 comprises at least one of nickel, palladium, and platinum. 
     
     
         7 . The process according to  claim 3 , further comprising separating a stream comprising hydrogen from the light naphtha stream provided to the reaction vessel. 
     
     
         8 . The process according to  claim 7 , wherein the hydrogen stream comprises ethene. 
     
     
         9 . The process according to  claim 1 , wherein the alkylation zone and the hydrogenation zone are, independently, at a temperature of about 100-about 400° C. and a pressure of about 700-about 2,900 kPa. 
     
     
         10 . The process according to  claim 7 , further comprising treating the hydrogen stream where the hydrogen stream comprises no more than about 50 ppm, by weight, hydrogen sulfide, no more than about 50 ppm, by weight, ammonia, and optionally no more than about 100 ppm, by weight, carbon monoxide, based on the weight of the hydrogen stream prior to being combined with the light cycle oil and one or more C2-C6 alkenes. 
     
     
         11 . An apparatus, comprising:
 A) a catalytic cracking zone for producing a hydrocarbon product stream;   B) a fractionation zone receiving the hydrocarbon product stream and providing a light naphtha stream and a light cycle oil stream;   C) a separation zone for separating a stream comprising hydrogen and ethene from the light naphtha stream;   D) a treatment zone adapted to receive the stream comprising hydrogen and ethene, and comprising a first removal zone for removing hydrogen sulfide, and a washing zone for removing ammonia; and   E) a reaction vessel for alkylating and hydrogenating the light cycle oil stream; wherein the reaction vessel receives a feed comprising hydrogen and one or more C2-C6 alkenes, and the light cycle oil stream wherein the light cycle oil and hydrogen are obtained from the hydrocarbon product stream.   
     
     
         12 . The apparatus according to  claim 11 , wherein the catalytic cracking zone further comprises a regeneration zone that communicates with the reaction vessel for regenerating catalyst. 
     
     
         13 . The apparatus according to  claim 11 , wherein the catalytic cracking zone comprises a fluid catalytic cracking zone.