# US 2021/0340468 A1 · Azeotropic compositions comprising dimethyl carbonate and perfluoroalkene ethers > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2021/0340468 A1 - Document ID: US20210340468A1 - Status: Published application - Kind: A1 - Application number: 17/273,375 - Filed: 2019-09-11 - Published: 2021-11-04 - Earliest claimed: 2018-09-11 - Assignees: The Chemours Company Fc, LLC - Applicants: The Chemours Company Fc, LLC - Inventors: HARRISON K. MUSYIMI - Web page: https://patentgrep.com/patent/US20210340468A1 ## CPC - C11D 7/5077: {Mixtures of only oxygen-containing solvents} - C11D 7/5086: {the oxygen-containing solvents being different from alcohols, e.g. mixtures of water and ethers} - C11D 3/43: Solvents - C11D 7/30: Halogenated hydrocarbons - C11D 7/509: {Mixtures of hydrocarbons and oxygen-containing solvents} - C23G 5/032: containing oxygen-containing compounds - C11D 3/24: containing halogen {(C11D3/162, C11D3/164, C11D3/166, C11D3/168 take precedence)} - C11D 3/245: {containing fluorine} - C11D 2111/22: Electronic devices, e.g. PCBs or semiconductors - C11D: DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL - C23G: CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS ## Abstract The present application provides azeotrope or azeotrope-like compositions comprising dimethyl carbonate and a perfluoroheptene ether or a perfluoropentene ether, wherein the perfluoroheptene ether or perfluoropentene ether is present in the composition in an amount effective to form an azeotrope composition or azeotrope-like composition with the dimethyl carbonate. Methods of using the composition provided herein in cleaning and carrier fluid applications are also provided. ## Claims ### Claim 1 A composition, comprising: i) dimethyl carbonate; and ii) a compound selected from methoxy perfluoroheptene and methoxy perfluoropentene; wherein the methoxy perfluoroheptene or methoxy perfluoropentene is present in the composition in an amount effective to form an azeotrope composition or azeotrope-like composition with the dimethyl carbonate. ### Claim 2 (depends on 1) The composition of claim 1, wherein the composition comprises dimethyl carbonate and methoxy perfluoroheptene, wherein the methoxy perfluoroheptene is present in the composition in an amount effective to form an azeotrope composition or azeotrope-like composition with the dimethyl carbonate. ### Claim 3 (depends on 2) The composition of claim 2, wherein the methoxy perfluoroheptene comprises a mixture of (E)-4-methoxy-perfluorohept-3-ene, (E)-3-methoxy-perfluorohept-3-ene, (E)-5-methoxy-perfluorohept-3-ene, (E)-4-methoxy-perfluorohept-2-ene, (Z)-3-methoxy-perfluorohept-3-ene, and (Z)-4-methoxy-perfluorohept-3-ene. ### Claim 4 (depends on 3) The composition of claim 3, wherein the composition comprises from about 80 to about 40 weight percent dimethyl carbonate and from about 20 to about 60 weight percent methoxy perfluoroheptene. ### Claim 5 (canceled) ### Claim 6 (canceled) ### Claim 7 (depends on 3) The composition of claim 3, wherein the composition consists essentially of from about from about 80 to about 40 weight percent dimethyl carbonate and from about 20 to about 60 weight percent methoxy perfluoroheptene. ### Claim 8 (depends on 3) The composition of claim 3, wherein the composition consists essentially of about 50 weight percent dimethyl carbonate and about 50 weight percent methoxy perfluoroheptene. ### Claim 9 (depends on 8) The composition of claim 8, wherein the composition is an azeotrope composition having a boiling point of about 85° C. to about 86° C. at a pressure of about 101 kPa. ### Claim 10 (canceled) ### Claim 11 (depends on 3) The composition of claim 3, further comprising 1,1,2,2,3,3,4-heptafluorocyclopentane, wherein the methoxy perfluoroheptene and 1,1,2,2,3,3,4-heptafluorocyclopentane are each present in the composition in amounts effective to form an azeotrope composition or azeotrope-like composition with the dimethyl carbonate ### Claim 12 (depends on 11) The composition of claim 11, wherein the composition comprises from about 22 to about 35 weight percent dimethyl carbonate, from about 22 to about 35 weight percent methoxy perfluoroheptene and from about 30 to about 52 weight percent 1,1,2,2,3,3,4-heptafluorocyclopentane. ### Claim 13 (canceled) ### Claim 14 (canceled) ### Claim 15 (depends on 11) The composition of claim 11, wherein the composition consists essentially of dimethyl carbonate, methoxy perfluoroheptene, and from about 30 to about 52 weight percent methoxy perfluoroheptene. ### Claim 16 (depends on 11) The composition of claim 11, wherein the composition consists essentially of from about 22 to about 35 weight percent dimethyl carbonate, from about 22 to about 35 weight percent methoxy perfluoroheptene, and from about 30 to about 52 weight percent 1,1,2,2,3,3,4-heptafluorocyclopentane. ### Claim 17 (depends on 11) The composition of claim 11, wherein the composition consists essentially of about 40 weight percent 1,1,2,2,3,3,4-heptafluorocyclopentane, about 30 weight percent dimethyl carbonate, and about 30 weight percent methoxy perfluoroheptene. ### Claim 18 (depends on 17) The composition of claim 17, wherein the composition is an azeotrope composition having a boiling point of about 88° C. at a pressure of about 101 kPa. ### Claim 19 (canceled) ### Claim 20 (depends on 1) The composition of claim 1, wherein the composition comprises dimethyl carbonate and methoxy perfluoropentene, wherein the methoxy perfluoropentene is present in the composition in an amount effective to form an azeotrope composition or azeotrope-like composition with the dimethyl carbonate. ### Claim 21 (depends on 20) The composition of claim 20, wherein the methoxy perfluoropentene comprises a mixture of (E)-2-methoxy-perfluoropent-2-ene, (E)-4-methoxy-perfluoropent-2-ene, (Z)-2-methoxy-perfluoropent-2-ene, (Z)-4-methoxy-perfluoropent-2-ene, (E)-3-methoxy-perfluoropent-2-ene, and (Z)-3-methoxy-perfluoropent-2-ene. ### Claim 22 (depends on 20) The composition of claim 20, wherein the composition comprises from about 0.1 to about 12 weight percent dimethyl carbonate and from about 99.9 to about 88 weight percent methoxy perfluoropentene. ### Claim 23 (canceled) ### Claim 24 (canceled) ### Claim 25 (depends on 20) The composition of claim 20, wherein the composition consists essentially of from about from about 0.1 to about 12 weight percent dimethyl carbonate and from about 99.9 to about 88 weight percent methoxy perfluoropentene. ### Claim 26 (depends on 20) The composition of claim 20, wherein the composition consists essentially of about 8 weight percent dimethyl carbonate and about 92 weight percent methoxy perfluoropentene. ### Claim 27 (depends on 20) The composition of claim 20, wherein the composition is an azeotrope composition having a boiling point of about 74° C. at a pressure of about 101 kPa. ### Claim 28 (canceled) ### Claim 29 (canceled) ### Claim 30 (canceled) ### Claim 31 (canceled) ### Claim 32 (canceled) ### Claim 33 (canceled) ### Claim 34 (canceled) ### Claim 35 (canceled) ### Claim 36 (canceled) ### Claim 37 (depends on 1) A process for dissolving a solute, comprising contacting and mixing said solute with a sufficient quantity of the composition of claim 1. ### Claim 38 (depends on 1) A process of cleaning a surface, comprising contacting the composition claim 1 with said surface. ### Claim 39 (depends on 1) A process for removing at least a portion of water from the surface of a wetted substrate, comprising contacting the substrate with the composition of claim 1, and then removing the substrate from contact with the composition. ### Claim 40 (depends on 39) The process of claim 39, wherein composition further comprises at least one surfactant suitable for dewatering or drying the substrate.