# US 2014/0197109 A1 · Process for removing one or more disulfide compounds > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0197109 A1 - Document ID: US20140197109A1 - Status: Published application - Kind: A1 - Application number: 13/741,771 - Filed: 2013-01-15 - Published: 2014-07-17 - Earliest claimed: 2013-01-15 - Assignees: Uop LLC - Applicants: Uop, LLC - Inventors: Luigi Laricchia; Daniel K. Aiken - Web page: https://patentgrep.com/patent/US20140197109A1 ## CPC - B01D 17/045: {with coalescers} - C10G 19/08: Recovery of used refining agents - C10G 2300/202: Heteroatoms content, i.e. S, N, O, P - B01D: SEPARATION (separating solids from solids by wet methods B03B, B03D; by pneumatic jigs or tables B03B; by other dry methods B07; magnetic or electrostatic separation of solid materials from solid materials or fluids, separation by high-voltage electric fields B03C; centrifuges, vortex apparatus B04; presses per se for squeezing-out liquid from liquid-containing material B30B9/02; treatment of water C02F, e.g. softening by ion-exchange C02F1/42; {arrangements of air intake cleaners in gas turbine plants F02C7/05} ; arrangements or mounting of filters in air-conditioning, air-humidification or ventilation F24F13/28) - C10G: CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION (cracking to hydrogen or synthesis gas C01B; cracking or pyrolysis of hydrocarbon gases to individual hydrocarbons or mixtures thereof of definite or specified constitution C07C; cracking to cokes C10B); RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES ## Abstract One exemplary embodiment can be a process for removing one or more disulfide compounds from a caustic stream. The process may include passing the caustic stream, previously contacted with a hydrocarbon stream for removing one or more thiol compounds, through a vessel containing a coalescing element to remove the one or more disulfide compounds downstream of a three-phase separator and a thiol oxidation zone. ## Claims ### Claim 1 A process for removing one or more disulfide compounds from a caustic stream, comprising: passing the caustic stream, previously contacted with a hydrocarbon stream for removing one or more thiol compounds, through a vessel containing a coalescing element to remove the one or more disulfide compounds downstream of a three-phase separator and a thiol oxidation zone. ### Claim 2 (depends on 1) The process according to claim 1, wherein the coalescing element comprises a mesh. ### Claim 3 (depends on 2) The process according to claim 2, wherein the mesh comprises a stainless steel. ### Claim 4 (depends on 2) The process according to claim 2, wherein the mesh comprises a coating. ### Claim 5 (depends on 4) The process according to claim 4, wherein the mesh has a thickness of about 0.3—about 0.6 meter as measured by the direction of fluid flow. ### Claim 6 (depends on 1) The process according to claim 1, further comprising obtaining a disulfide stream from the vessel. ### Claim 7 (depends on 6) The process according to claim 6, further comprising passing the disulfide stream upstream of the thiol oxidation zone. ### Claim 8 (depends on 6) The process according to claim 6, further comprising recycling at least a portion of the disulfide stream to the vessel. ### Claim 9 (depends on 1) The process according to claim 1, further comprising providing an oxidized caustic stream from the thiol oxidation zone to the three-phase separator. ### Claim 10 (depends on 9) The process according to claim 9, further comprising obtaining a gas stream from a stack of the three-phase separator. ### Claim 11 (depends on 9) The process according to claim 9, further comprising obtaining a separated caustic stream from the three-phase separator. ### Claim 12 (depends on 11) The process according to claim 11, further comprising combining a wash oil stream with the separated caustic stream and providing the combined stream to the vessel. ### Claim 13 A process for removing one or more disulfide compounds from a caustic stream, comprising: A) obtaining the caustic stream containing one or more thiol compounds from an extraction zone; B) passing the caustic stream to a thiol oxidation zone; C) obtaining an oxidized caustic stream and sending the stream to a three-phase separator; D) passing a separated caustic stream from the three-phase separator to a vessel containing a coalescing element to remove the one or more disulfide compounds; E) obtaining a disulfide stream from the vessel; and F) recycling the disulfide stream upstream of the thiol oxidation zone. ### Claim 14 (depends on 13) The process according to claim 13, wherein the coalescing element comprises a coated mesh. ### Claim 15 (depends on 14) The process according to claim 14, wherein the mesh comprises a coated stainless steel. ### Claim 16 (depends on 14) The process according to claim 14, wherein the coated mesh has a thickness of about 0.3—about 0.6 meter as measured by the direction of fluid flow. ### Claim 17 A process for removing one or more disulfide compounds from a caustic stream, comprising: A) obtaining the caustic stream containing one or more thiol compounds from an extraction zone; B) passing the caustic stream to a thiol oxidation zone; C) obtaining an oxidized caustic stream and sending the stream to a three-phase separator; D) passing a separated caustic stream from the three-phase separator to a vessel containing a coalescing element to remove the one or more disulfide compounds; E) obtaining a disulfide stream from the vessel; and F) recycling at least a portion of the disulfide stream to the vessel. ### Claim 18 (depends on 17) The process according to claim 17, wherein the coalescing element comprises a coated mesh. ### Claim 19 (depends on 18) The process according to claim 18, wherein the coated mesh comprises a coated stainless steel mesh. ### Claim 20 (depends on 18) The process according to claim 18, wherein the mesh has a thickness of about 0.3—about 0.6 meter as measured by the direction of fluid flow.