# US 7,745,674 B2 · Alkylation slurry reactor > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 7,745,674 B2 - Document ID: US7745674B2 - Status: Granted - Kind: B2 - Application number: 12/195,016 - Filed: 2008-08-20 - Published: 2010-02-25 - Granted: 2010-06-29 - Earliest claimed: 2008-08-20 - Assignees: Catalytic Distillation Technologies - Inventors: Christopher C. Boyer; Lawrence A. Smith, Jr. - Web page: https://patentgrep.com/patent/US7745674B2 ## CPC - C07C 2/66: Catalytic processes - B01J 8/087: {Heating or cooling the reactor} - B01J 8/20: with liquid as a fluidising medium - C07C 6/126: {of more than one hydrocarbon} - B01J 29/7007: {Zeolite Beta} - B01J 2208/00353: Non-cryogenic fluids - B01J 2219/00006: Large-scale industrial plants - C07C 2521/06: Silicon, titanium, zirconium or hafnium; Oxides or hydroxides thereof - C07C 2523/30: Tungsten - C07C 2527/053: Sulfates or other compounds comprising the anion (SnO3n+1)2- - C07C 2529/08: of the faujasite type, e.g. type X or Y - C07C 2529/18: of the mordenite type - C07C 2529/40: of the pentasil type, e.g. types ZSM-5, ZSM-8 or ZSM-11 - C07C 2529/70: of types characterised by their specific structure not provided for in groups C07C2529/08 - C07C2529/65 - C07C 2529/89: Silicates, aluminosilicates or borosilicates of titanium, zirconium or hafnium - Y02P 20/52: using catalysts, e.g. selective catalysts - Y02P 20/582: Recycling of unreacted starting or intermediate materials - C07C: ACYCLIC OR CARBOCYCLIC COMPOUNDS - B01J: CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS - Y02P: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS ## Abstract A process for alkylation of benzene, including: feeding benzene, a polyalkylate, and a catalyst to a reactor comprising a first and a second reaction zone; reacting the benzene and the polyalkylate in the first reaction zone under transalkylation conditions to form a monoalkylate product; feeding a C2-C4 olefin to the reactor intermediate the first and second reaction zones; reacting benzene and the C2-C4 olefin in the second reaction zone under alkylation conditions to form additional monoalkylate product; recovering an effluent from the reactor, wherein the effluent comprises benzene, the monoalkylate product, any unreacted C2-C4 olefins, heavy hydrocarbons, and the catalyst; separating the catalyst from the effluent; separating the benzene from the monoalkylate product and the heavy hydrocarbons within the liquid effluent; separating the monoalkylate product from the heavy hydrocarbons within the liquid effluent; and recovering the monoalkylate product. ## Claims ### Claim 1 A process for alkylation of benzene, comprising: feeding benzene, a polyalkylate, and a catalyst to a reactor comprising a first and a second reaction zone; reacting the benzene and the polyalkylate in the first reaction zone under transalkylation conditions to form a monoalkylate product; feeding a C2-C4 olefin to the reactor intermediate the first and second reaction zones; reacting benzene and the C2-C4 olefin in the second reaction zone under alkylation conditions to form additional monoalkylate product; recovering an effluent from the reactor, wherein the effluent comprises benzene, the monoalkylate product, any unreacted C2-C4 olefins, heavy hydrocarbons, and the catalyst; separating the catalyst from the effluent; separating the benzene from the monoalkylate product and the heavy hydrocarbons within the liquid effluent; separating the monoalkylate product from the heavy hydrocarbons within the liquid effluent; recovering the monoalkylate product. ### Claim 2 (depends on 1) The process according to claim 1, further comprising recovering at least a portion of heat of reaction in a heat transfer medium to control a temperature of at least one of the first reaction zone and the second reaction zone. ### Claim 3 (depends on 2) The process according to claim 2, wherein the reactor further comprises a pre-heat section, the process further comprising pre-heating at least one of benzene and the polyalkylate in the pre-heat section prior to the first reaction zone. ### Claim 4 (depends on 1) The process according to claim 1, further comprising recycling at least a portion of the recovered catalyst to the first reaction zone. ### Claim 5 (depends on 1) The process according to claim 1, wherein the catalyst comprises solid zeolite particles. ### Claim 6 (depends on 4) The process according to claim 4, further comprising at least one of adding fresh catalyst to the first reaction zone and purging spent catalyst from the recycle. ### Claim 7 (depends on 1) The process according to claim 1, wherein the heavy hydrocarbons in the effluent comprise polyalkylate and flux oil. ### Claim 8 (depends on 7) The process according to claim 7, further comprising separating the polyalkylate from the heavy hydrocarbons. ### Claim 9 (depends on 8) The process according to claim 8, further comprising recycling the polyalkylate to the reactor as the polyalkylate feed. ### Claim 10 (depends on 1) The process according to claim 1, further comprising recycling at least a portion of the benzene separated from the monoalkylate to the reactor. ### Claim 11 (depends on 1) The process according to claim 1, wherein the C2-C4 olefin is propylene. ### Claim 12 (depends on 1) The process according to claim 1, wherein the monoalkylate product comprises at least one of cumene, ethylbenzene, and butyl benzene. ### Claim 13 (depends on 1) The process according to claim 1, further comprising feeding additional C2-C4 olefin to the reactor within the second reaction zone.