# US 2013/0158324 A1 · Processes and Systems for Conversion of Alkyl Bromides to Higher Molecular Weight Hydrocarbons in Circulating Catalyst Reactor-Regenerator Systems > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2013/0158324 A1 - Document ID: US20130158324A1 - Status: Published application - Kind: A1 - Application number: 13/705,106 - Filed: 2012-12-04 - Published: 2013-06-20 - Earliest claimed: 2011-12-16 - Assignees: Marathon Gtf Technology, Ltd. - Inventors: John J. Waycuilis; Raphael Thomas; Patrick K. Moore - Web page: https://patentgrep.com/patent/US20130158324A1 ## CPC - C07C 1/321: {the hetero-atom being a non-metal atom} - C07C 1/30: by splitting-off the elements of hydrogen halide from a single molecule - C07C 2529/06: Crystalline aluminosilicate zeolites; Isomorphous compounds thereof - Y02P 20/584: Recycling of catalysts - C07C: ACYCLIC OR CARBOCYCLIC COMPOUNDS - Y02P: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS ## Abstract Process and system that include the conversion of alkyl bromides to higher molecular weight hydrocarbons in circulating catalyst reactor-regenerator systems. Alkyl bromides may be reacted over a catalyst in at least one conversion reactor to produce at least an effluent stream comprising higher molecular weight hydrocarbons and hydrogen bromide. A portion of the catalyst may be removed from the conversion reactor. The portion of the catalyst may be contacted with a stripping gas to displace hydrocarbons from the portion of the catalyst. The portion of the catalyst may be contacted a first inert gas. The portion of the catalyst may be contacted with oxygen to form a regenerated catalyst by removal of coke. The regenerated catalyst may be contacted with a second inert gas. At least a portion of the regenerated catalyst may be introduced into the conversion reactor. ## Claims ### Claim 1 A process comprising: reacting at least alkyl bromides over a catalyst in at least one conversion reactor to produce at least an effluent stream comprising higher molecular weight hydrocarbons and hydrogen bromide; removing a portion of the catalyst from the conversion reactor; contacting the portion of the catalyst with a stripping gas to displace hydrocarbons from the portion of the catalyst; contacting the portion of the catalyst with a first inert gas; contacting the portion the catalyst with oxygen to form a regenerated catalyst by removal of coke; contacting the regenerated catalyst with a second inert gas; and introducing at least a portion of the regenerated catalyst into the conversion reactor. ### Claim 2 (depends on 1) The process of claim 1 wherein the catalyst comprises a crystalline alumino-silicate framework, and wherein the higher molecular weight hydrocarbons comprise hydrocarbons having six or more carbon atoms and the alkyl bromides comprise bromomethane. ### Claim 3 (depends on 1) The process of claim 1 wherein the alkyl bromides have a ratio of mono-brominated alkanes to mono-brominated alkanes plus di-brominated alkanes of equal to or greater than about 0.9. ### Claim 4 (depends on 1) The process of claim 1 wherein the portion of the catalyst removed from the conversion reactor comprises coke in an amount of equal to or greater than about 10 weight %. ### Claim 5 (depends on 1) The process of claim 1 wherein the stripping gas comprises at least one alkane selected from the group consisting of methane, ethane, propane, and any combination thereof. ### Claim 6 (depends on 1) The process of claim 1 wherein the stripping gas comprises hydrogen. ### Claim 7 (depends on 1) The process of claim 1 wherein the regenerated catalyst comprises coke in an amount of about 2 weight % to about 10 weight %. ### Claim 8 (depends on 1) The process of claim 1 wherein the regenerated catalyst comprise coke in an amount of less than about 0.1 weight %. ### Claim 9 (depends on 1) The process of claim 1 further comprising combining the stripping gas comprising the displaced hydrocarbons with the effluent stream from the conversion reactor, wherein the displaced hydrocarbons comprise hydrocarbons comprising six or more carbon atoms. ### Claim 10 (depends on 1) The process of claim 1: wherein the stripping gas contacts the portion of the catalyst in an upper stripping stage; wherein the first inert gas contacts the portion of the catalyst in a lower stripping stage; and wherein a residence time of the catalyst in the upper stripping stage is greater than a residence time of the portion of the catalyst in the lower stripping stage. ### Claim 11 (depends on 1) The process of claim 1 wherein the contacting the portion the catalyst with oxygen is at a temperature of about 450° C. to about 650° C. ### Claim 12 (depends on 1) The process of claim 1 wherein the conversion reactor comprises a moving bed of the catalyst, the catalyst having a particle size of about 1 millimeter to about 10 millimeters, and wherein the regenerated catalyst is introduced at or near a top of the conversion reactor. ### Claim 13 (depends on 12) The process of claim 12 wherein the catalyst is arranged in the conversion reactor in an annular bed. ### Claim 14 (depends on 1) The process of claim 1 further comprising: cooling a slipstream of the effluent stream; separating a gas stream from the cooled effluent stream; combining the gas stream with the alkyl bromides; and introducing the gas stream and the alkyl bromides to the conversion reactor. ### Claim 15 (depends on 1) The process of claim 1 further comprising: removing hydrogen bromide from effluent stream; oxidizing the hydrogen bromide to produce elemental bromine and water; and reacting the elemental bromine with lower molecular alkanes to produce additional alkyl bromides that are introduced into the conversion reactor. ### Claim 16 (depends on 15) The process of claim 15 wherein the removing the hydrogen bromide comprises separating the effluent stream into at least a methane stream, an ethane stream, a hydrogen bromide stream, a butane stream, and a liquid product stream, the liquid product stream comprising hydrocarbons having four or more hydrocarbons. ### Claim 17 A process comprising: reacting at least bromomethane over a crystalline alumino-silicate catalyst in at least one conversion reactor to produce at least an effluent stream comprising higher molecular weight hydrocarbons and hydrogen bromide; introducing a portion of the catalyst from the conversion reactor into a two-stage stripping unit; introducing a stripping gas into an upper stage of the two-stage stripping unit to displace hydrocarbons from the portion of the catalyst, the hydrocarbons comprising hydrocarbons having six or more carbon atoms; introducing a first inert gas into a lower stage of the two-stage stripping unit to remove a quantity of the stripping gas from the portion of the catalyst; introducing the portion of the catalyst from the two-stage stripping unit into a regeneration reactor to form a regenerated catalyst, wherein the portion of the catalyst is contacted with an oxygen-containing stream for coke removal; and introducing at least a portion of the regenerated catalyst into the conversion reactor. ### Claim 18 (depends on 17) The process of claim 17 wherein the portion of the catalyst removed from the conversion reactor comprises coke in an amount of equal to or greater than about 10 weight %, and wherein the regenerated catalyst comprise coke in an amount of about 2 weight % to about 10 weight %. ### Claim 19 (depends on 17) The process of claim 17 further comprising: removing hydrogen bromide from the effluent stream in a hydrogen bromide removal unit; oxidizing the hydrogen bromide to produce elemental bromine and water; and reacting the elemental bromine with lower molecular alkanes to produce additional bromomethane that are introduced into the conversion reactor, the lower molecular alkanes comprising recycled methane and feed methane that was fed to the hydrogen bromide removal unit. ### Claim 20 A reactor system comprising: a conversion reactor configured for reaction of at least alkyl bromides over a catalyst to produce at least a stream comprising higher molecular weight hydrocarbons and hydrogen bromide; a two-stage stripping unit configured to receive a portion of the catalyst from the conversion reactor, the two-stage stripping unit comprising a first stripping stage configured for contact of the portion of the catalyst with a stripping gas, and a second stripping stage configured for contact of the portion of the catalyst with an inert gas; a regeneration reactor configured for oxidation of the portion of the catalyst from the two-stage stripping unit; and a second stripping unit configured for contact of the portion of the catalyst from the regeneration reactor with an inert gas.