# US 2014/0194659 A1 · Staged propylene production process > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0194659 A1 - Document ID: US20140194659A1 - Status: Published application - Kind: A1 - Application number: 13/738,631 - Filed: 2013-01-10 - Published: 2014-07-10 - Earliest claimed: 2013-01-10 - Assignees: Equistar Chemicals, LP; Lyondell Chemical Technology, L.P. - Inventors: Allen David Hood, JR.; Robert S. Bridges - Web page: https://patentgrep.com/patent/US20140194659A1 ## CPC - C07C 4/06: Catalytic processes {(C07C4/025 takes precedence)} - C07C 6/04: at a carbon-to-carbon double bond - C07C: ACYCLIC OR CARBOCYCLIC COMPOUNDS ## Abstract Processes for forming propylene are described herein. The processes generally include reacting a metathesis feed stream including butene with ethylene in the presence of a first metathesis catalyst via a first metathesis reaction to form a first metathesis product stream including propylene, ethylene, butene, and C5+ olefins; separating at least a portion of the propylene and ethylene from the first metathesis product stream to form a first overhead stream and to form a first de-propenized bottoms stream including butene and C5+ olefins; reacting at least a portion of the first de-propenized bottoms stream with ethylene in the presence of a second metathesis catalyst via a second metathesis reaction to form a second metathesis product stream including propylene, ethylene, butene, and C5+ olefins; and separating at least a portion of the propylene and ethylene from the second metathesis product stream to form a second overhead stream; and recovering propylene from the first overhead stream, the second overhead stream or combinations thereof. ## Claims ### Claim 1 A process for forming propylene comprising: reacting a metathesis feed stream comprising butene with ethylene in the presence of a first metathesis catalyst via a first metathesis reaction to form a first metathesis product stream comprising propylene, ethylene, butene, and C5+ olefins, wherein the first metathesis reaction takes place at an first ethylene:butene ratio of from 0.3:1 to 3:1; separating at least a portion of the propylene and ethylene from the first metathesis product stream to form a first overhead stream and to form a first de-propenized bottoms stream comprising butene and C5+ olefins; reacting at least a portion of the first de-propenized bottoms stream with ethylene in the presence of a second metathesis catalyst via a second metathesis reaction to form a second metathesis product stream comprising propylene, ethylene, butene, and C5+ olefins, wherein the second metathesis reaction takes place at an second ethylene:butene ratio of from 2.0:1 to 10:1; and separating at least a portion of the propylene and ethylene from the second metathesis product stream to form a second overhead stream; and recovering propylene from the first overhead stream, the second overhead stream or combinations thereof. ### Claim 2 (depends on 1) The process of claim 1 further, wherein the first overhead stream comprises propylene and ethylene and the second overhead stream comprises propylene and ethylene. ### Claim 3 (depends on 1) The process of claim 1 further comprising: separating at least a portion of the first overhead stream to form an ethylene stream and a propylene stream. ### Claim 4 (depends on 1) The process of claim 1 further comprising: separating at least a portion of the second overhead stream to form an ethylene stream and a propylene stream. ### Claim 5 (depends on 1) The process of claim 1 further comprising: separating at least a portion of the first overhead stream and at least a portion of the second overhead stream to form an ethylene stream and a propylene stream. ### Claim 6 (depends on 5) The process of claim 5 further comprising recycling at least a portion of the ethylene stream to the first metathesis reaction, the second metathesis reaction or a combination thereof. ### Claim 7 (depends on 1) The process of claim 1, wherein the metathesis feed stream further comprises Raffinate-2. ### Claim 8 (depends on 1) The process of claim 1, wherein the first metathesis reaction, the second metathesis reaction or a combination thereof further comprises reacting the corresponding metathesis feed stream with ethylene in the presence of an isomerization catalyst. ### Claim 9 (depends on 8) The process of claim 8, wherein the isomerization catalyst comprises magnesium oxide. ### Claim 10 (depends on 1) The process of claim 1, wherein ethylene is introduced to the first metathesis reaction and the second metathesis reaction at rates sufficient to provide a lower ethylene:butene ratio contacting the first metathesis catalyst than the ethylene:butene ratio contacting the second metathesis catalyst. ### Claim 11 (depends on 1) The process of claim 1, wherein the first metathesis reaction takes place at an first ethylene:butene ratio of from 0.5:1 to 2.5:1. ### Claim 12 (depends on 11) The process of claim 11, wherein the second metathesis reaction takes place at an second ethylene:butene ratio of from 3.75:1 to 6.75:1. ### Claim 13 (depends on 1) The process of claim 1, wherein the process exhibits a total butene conversion of at least 85%. ### Claim 14 (depends on 1) The process of claim 1, wherein the first metathesis catalyst and the second metathesis catalyst comprise a transition metal oxide. ### Claim 15 (depends on 1) The process of claim 1, wherein the first metathesis catalyst and second metathesis catalyst comprise the same material. ### Claim 16 (depends on 1) The process of claim 1, wherein separating at least a portion of the propylene and ethylene from the second metathesis product forms a second de-propenized bottoms stream comprising butene and C5+ olefins. ### Claim 17 (canceled)