| Patent application number | Description | Published |
|---|
| 20110083846 | PROCESS FOR TERTIARY MINERAL OIL PRODUCTION USING SURFACTANT MIXTURES - A process for mineral oil production, especially Winsor type III microemulsion flooding, in which an aqueous surfactant formulation which comprises at least one nonionic surfactant having 8 to 30 ethoxy units, which has a polydispersity of from 1.01 to 1.12, and at least one further surfactant is forced through injection wells into a mineral oil deposit and crude oil is removed from the deposit through production wells. | 04-14-2011 |
| 20110083847 | PROCESS FOR TERTIARY MINERAL OIL PRODUCTION USING SURFACTANT MIXTURES - A process for mineral oil production, especially Winsor type III microemulsion flooding, in which an aqueous surfactant formulation which comprises at least one alkylpolyalkoxysulfate comprising propoxy groups, and at least one further surfactant differing therefrom is used, is forced through injection wells into a mineral oil deposit and crude oil is removed from the deposit through production wells. The alkylpolyalkoxysulfate comprising propoxy groups is prepared in this case by sulfating an alkoxylated alcohol, the alkoxylated alcohol being prepared by alkoxylating an alcohol using double metal cyanide catalysts or double hydroxide clays. | 04-14-2011 |
| 20110083848 | PROCESS FOR MINERAL OIL PRODUCTION USING SURFACTANT MIXTURES - A process for mineral oil production especially Winsor type III microemulsion flooding, in which an aqueous surfactant formulation which comprises at least one nonionic surfactant having 11 to 40 ethoxy units and a hydrophobic radical having 8 to 32 carbon atoms and at least one further surfactant differing therefrom is forced through injection wells into a mineral oil deposit and crude oil is removed from the deposit through production wells. | 04-14-2011 |
| 20110220353 | USE OF SURFACTANT MIXTURES OF POLYCARBOXYLATES FOR MICROEMULSION FLOODING - The present invention relates to processes for tertiary mineral oil production with the aid of a surfactant mixture and to the use of a surfactant mixture for tertiary mineral oil production by means of Winsor type III microemulsion flooding, by injecting a surfactant mixture through at least one aqueous injection borehole into a mineral oil deposit, and withdrawing crude oil from the deposit through at least one production borehole, wherein the surfactant mixture, for the purpose of lowering the interfacial tension between oil and water to <0.1 mN/m, comprises at least the following components: (a) one or more polycarboxylate(s) comprising at least 50 mol % of acrylic acid units and/or methacrylic acid units and/or maleic acid units and/or itaconic acid units or salts thereof, and (b) one or more anionic and/or nonionic surfactant(s). | 09-15-2011 |
| 20110220364 | PROCESS FOR MINERAL OIL PRODUCTION USING CATIONIC SURFACTANTS HAVING A HYDROPHOBIC BLOCK WITH A CHAIN LENGTH OF 6 TO 10 CARBON ATOMS - The invention relates to a process for mineral oil production by means of Winsor type III microemulsion flooding, in which an aqueous surfactant formulation comprising at least one ionic surfactant of the general formula R | 09-15-2011 |
| 20110220365 | PROCESS FOR PRODUCING MINERAL OIL USING SURFACTANTS BASED ON C16C18-CONTAINING ALKYL PROPOXY SURFACTANTS - The invention relates to a process for mineral oil production by means of Winsor Type III microemulsion flooding, in which an aqueous surfactant formulation comprising at least one ionic surfactant of the general formula R | 09-15-2011 |
| 20110220366 | PROCESS FOR EXTRACTING MINERAL OIL USING SURFACTANTS BASED ON BUTYLENE OXIDE-CONTAINING ALKYL ALKOXYLATES - The invention relates to a process for mineral oil extraction by means of Winsor Type III microemulsion flooding, in which an aqueous surfactant formulation comprising at least one ionic surfactant of the general formula R | 09-15-2011 |
| 20110259583 | PROCESS FOR EXTRACTING MINERAL OIL USING SURFACTANTS, ESPECIALLY BASED ON C35 SECONDARY ALCOHOL-CONTAINING ALKYL ALKOXYLATES - The present invention relates to a process for mineral oil extraction by means of Winsor Type III microemulsion flooding, in which an aqueous surfactant formulation comprising at least one ionic surfactant of the general formula (R | 10-27-2011 |
| 20110263467 | PROCESS FOR PRODUCING MINERAL OIL USING SURFACTANTS BASED ON A MIXTURE OF C32 GUERBET-, C34 GUERBET-, C36 GUERBET-CONTAINING ALKYL ALKOXYLATES - The present invention relates to a process for mineral oil extraction by means of Winsor type III microemulsion flooding, in which an aqueous surfactant formulation comprising at least three ionic surfactants which are different with regard to the alkyl moiety (R | 10-27-2011 |
