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公开(公告)号：DE2802199A1
公开(公告)日：1979-07-26
申请号：DE2802199
申请日：1978-01-19
Applicant: BASF AG
Inventor： BRUNNER ERWIN DIPL PHYS DR , SCHUBERT ECKART DIPL CHEM DR , LINDNER ALFRED DIPL CHEM DR , MERGER FRANZ DIPL CHEM DR , VOLKAMER KLAUS DIPL CHEM DR , STROHMEYER MAX DIPL CHEM DR , SANDROCK GERHARD DIPL CHEM DR
Abstract: Isobutene is extracted from 4C hyrocarbon mixts. by reaction with isobutanol in presence of an acid condensing agent, sepn. of the tert. ether formed and decomposition at elevated temp. in presence of an acid catalyst. Used for treatment of 4C fractions from ethylene plants or butane/butene dehydrogenation plants to obtain isobutene-free raffinates for prodn. of sec. butanol, MEK, butene-1, octenene or maleic anhydride. No previous extn. of butadiene from the 4C fraction is required. The isobutanol forms no azeotrope with the 4C hydocarbons (as occurs by use of methanol), so that sepn. of the ether by simple fractionation gives an almost alcohol-free 4C raffinate without water-washing, contg. 50 (20) esp. =5 ppm isobutanol. Isobutene is obtd. in high purity and yield.
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公开(公告)号：DE3049213A1
公开(公告)日：1982-07-29
申请号：DE3049213
申请日：1980-12-27
Applicant: BASF AG
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公开(公告)号：DE2823983A1
公开(公告)日：1979-12-06
申请号：DE2823983
申请日：1978-06-01
Applicant: BASF AG
Abstract: A process for isolating 1,3-butadiene by means of a selective solvent from a C4-hydrocarbon mixture which contains 1,3-butadiene, propyne, hydrocarbons which are more soluble than 1,3-butadiene in the selective solvent and hydrocarbons which are less soluble than 1,3-butadiene in the selective solvent, wherein the C4-hydrocarbon mixture is separated, using one or more extractive distillation zones, into a distillate containing the less soluble hydrocarbons, a stream of 1,3-butadiene and a stream containing the more soluble hydrocarbons, and the propyne is separated off either by distillation of the C4-hydrocarbon mixture in a distillation zone upstream of the extractive distillation zone or zones or by distillation of the stream of 1,3-butadiene, obtained from the extractive distillation zone or zones, in a downstream distillation zone, giving a stream of hydrocarbons containing propyne and 1,3-butadiene, which stream is fed to an additional distillation zone, while at the same time a second stream of liquid or gaseous hydrocarbons is fed to the additional distillation zone, and the bottom product from the additional distillation zone is recycled to the extractive distillation.
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Patent Agency Ranking
公开(公告)号：DE2908426A1
公开(公告)日：1980-09-25
申请号：DE2908426
申请日：1979-03-05
Applicant: BASF AG
Inventor： LINDNER ALFRED DIPL CHEM DR , MERGER FRANZ DIPL CHEM DR , VOLKAMER KLAUS DIPL CHEM DR , WAGNER ULRICH DR , BRUNNER ERWIN DR , SANDROCK GERHARD DIPL CHEM DR , STROHMEYER MAX DIPL CHEM DR
IPC: C07C1/00 , C07C7/148 , C07C11/09 , C07C41/01 , C07C41/06 , C07C41/44 , C07C43/04 , C07C67/00 , C07C11/08 , C07C7/01
Abstract: A process for isolating isobutene from C4-hydrocarbon mixtures containing isobutene by reacting the mixture with a primary alcohol in the presence of an acid condensing agent, to form the tertiary ether, separating off the unconverted hydrocarbons and decomposing the tertiary ether in the presence of an acid catalyst at an elevated temperature, wherein a primary C3- or C4-alcohol is used and the temperature at which the reaction mixture leaves the etherification stage, in which the tertiary ether is formed, is lower than the mean temperature in the etherification stage.
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公开(公告)号：DE2840124A1
公开(公告)日：1980-03-27
申请号：DE2840124
申请日：1978-09-15
Applicant: BASF AG
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公开(公告)号：DE2928510A1
公开(公告)日：1981-01-29
申请号：DE2928510
申请日：1979-07-14
Applicant: BASF AG
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公开(公告)号：DE2928509A1
公开(公告)日：1981-01-29
申请号：DE2928509
申请日：1979-07-14
Applicant: BASF AG
Inventor： VOLKAMER KLAUS DIPL CHEM DR , LINDNER ALFRED DIPL CHEM DR , MERGER FRANZ DIPL CHEM DR , WAGNER ULRICH DIPL PHYS DR , BRUNNER ERWIN DIPL PHYS DR , SANDROCK GERHARD DIPL CHEM DR , STROHMEYER MAX DIPL CHEM DR
IPC: C07C41/05 , C07C1/00 , C07C7/148 , C07C11/09 , C07C41/00 , C07C41/06 , C07C43/04 , C07C67/00 , C07C11/08
Abstract: A process for conjointly preparing methyl tert.-butyl ether and obtaining isobutene from an isobutene-containing C4-hydrocarbon mixture. In the process the C4-hydrocarbon mixture is reacted, in one or more etherification stages, with methanol and a primary C3- or C4-alcohol in the presence of an acid condensing agent, the resulting reaction mixture or mixtures are then separated into a fraction containing the unconverted hydrocarbons, the methyl tert.-butyl ether and a fraction containing the C3- or C4-alkyl tert.-butyl ether. Thereafter, the C3- or C4-alkyl tert.-butyl ether is decomposed at an elevated temperature, in the presence of an acid catalyst, into isobutene and primary C3- or C4-alcohol.
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公开(公告)号：DE2802198A1
公开(公告)日：1979-07-26
申请号：DE2802198
申请日：1978-01-19
Applicant: BASF AG
Inventor： BRUNNER ERWIN DIPL PHYS DR , SCHUBERT ECKART DIPL CHEM DR , LINDNER ALFRED DIPL CHEM DR , MERGER FRANZ DIPL CHEM DR , VOLKAMER KLAUS DIPL CHEM DR , STROHMEYER MAX DIPL CHEM DR , SANDROCK GERHARD DIPL CHEM DR
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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