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公开(公告)号：BR7500922A
公开(公告)日：1975-12-02
申请号：BR7500922
申请日：1975-02-14
Applicant: BASF AG
Inventor： RAUCH K , KIEFER H , HOHENSCHUTZ H , HESSE D , STROHMEYER M
Abstract: Formic acid is isolated from mixtures containing formic acid, methyl formate, methanol and water by fractional distillation, the mixture being fed into the upper half of the distillation column and 5 to 15 theoretical plates being maintained above the feed point and 10 to 25 theoretical plates below the feed point. The formic acid is withdrawn at the bottom end of the column as an azeotrope with water, the azeotrope being in the liquid state or preferably in the vapor state.
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公开(公告)号：BR7900293A
公开(公告)日：1979-08-14
申请号：BR7900293
申请日：1979-01-16
Applicant: BASF AG
Inventor： BRUNNER E , STROHMEYER M , LINDNER A , SCHUBERT E , MERGER F , SANDROCK G , VOLKAMER K
IPC: B01J31/00 , C07B61/00 , C07C1/00 , C07C7/148 , C07C11/09 , C07C41/36 , C07C41/42 , C07C67/00 , C07C11/08 , C07C7/01
Abstract: A process for obtaining isobutene from a C4-hydrocarbon mixture containing isobutene, by reacting the mixture with a primary alcohol in the presence of an acid condensing agent and decomposing the resulting tertiary ether in the presence of an acid catalyst at an elevated temperature, wherein a primary C3- or C4-alcohol is used.
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Patent Agency Ranking
公开(公告)号：DK54275A
公开(公告)日：1975-10-13
申请号：DK54275
申请日：1975-02-14
Applicant: BASF AG
Inventor： RAUCH K , KIEFER H , HESSE D , STROHMEYER M , HOHENSCHUTZ H
Abstract: Formic acid is isolated from mixtures containing formic acid, methyl formate, methanol and water by fractional distillation, the mixture being fed into the upper half of the distillation column and 5 to 15 theoretical plates being maintained above the feed point and 10 to 25 theoretical plates below the feed point. The formic acid is withdrawn at the bottom end of the column as an azeotrope with water, the azeotrope being in the liquid state or preferably in the vapor state.
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公开(公告)号：SE7500972L
公开(公告)日：1975-08-04
申请号：SE7500972
申请日：1975-01-29
Applicant: BASF AG
Inventor： STROHMEYER M , WALZ H , APPL M , MOELL H , KERBER H , HOHENSCHUTZ H
Abstract: The formation of an emulsion when working up reaction mixtures containing butyraldehydes and cobalt is avoided by a treatment with gases containing molecular oxygen in an aqueous acid medium at an elevated temperature, at least twice the amount of molecular oxygen stoichiometrically required for the oxidation of the cobalt being used per gram atom of cobalt present in the oxoreaction mixture.
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公开(公告)号：SE7501571L
公开(公告)日：1975-08-18
申请号：SE7501571
申请日：1975-02-12
Applicant: BASF AG
Inventor： RAUCH K , KIEFER H , HESSE D , STROHMEYER M , HOHENSCHUTZ H
Abstract: Formic acid is isolated from mixtures containing formic acid, methyl formate, methanol and water by fractional distillation, the mixture being fed into the upper half of the distillation column and 5 to 15 theoretical plates being maintained above the feed point and 10 to 25 theoretical plates below the feed point. The formic acid is withdrawn at the bottom end of the column as an azeotrope with water, the azeotrope being in the liquid state or preferably in the vapor state.
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公开(公告)号：NO750461L
公开(公告)日：1975-08-18
申请号：NO750461
申请日：1975-02-12
Applicant: BASF AG
Inventor： RAUCH K , KIEFER H , HESSE D , STROHMEYER M , HOHENSCHUTZ H
Abstract: Formic acid is isolated from mixtures containing formic acid, methyl formate, methanol and water by fractional distillation, the mixture being fed into the upper half of the distillation column and 5 to 15 theoretical plates being maintained above the feed point and 10 to 25 theoretical plates below the feed point. The formic acid is withdrawn at the bottom end of the column as an azeotrope with water, the azeotrope being in the liquid state or preferably in the vapor state.
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