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公开(公告)号：CA1151217A
公开(公告)日：1983-08-02
申请号：CA355097
申请日：1980-06-30
Applicant: BASF AG
Inventor： VOLKAMER KLAUS , LINDNER ALFRED , MERGER FRANZ , WAGNER ULRICH , BRUNNER ERWIN , SANDROCK GERHARD , STROHMEYER MAX
Abstract: A process for conjointly preparing methyl tert.-butyl ether and obtaining isobutene from an isobutene-containing C4-hydrocarbon mixture, wherein a) 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, b) 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 and c) thereafter the C3- or C4-alkyl tert.-butyl ether is decomposed at r.. 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：NO145433C
公开(公告)日：1982-03-24
申请号：NO761220
申请日：1976-04-08
Applicant: BASF AG
Inventor： WEITZ HANS-MARTIN , WAGNER ULRICH , VOLKAMER KLAUS , SCHUBERT ECKART , BANDERMANN FRIEDHELM
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公开(公告)号：CA1110573A
公开(公告)日：1981-10-13
申请号：CA303668
申请日：1978-05-18
Applicant: BASF AG
Inventor： STOCKBURGER DIETER , VOLKAMER KLAUS , BENDER DETLEF , SCHNEIDER KLAUS-JUERGEN , SCHWENTKER HARALD , WAGNER ULRICH , WEITZ HANS-MARTIN
Abstract: A process for separating, by means of a selective solvent, a mixture of C4-hydrocarbons which contains some hydrocarbons which are more soluble in the selective solvent and some which are less soluble therein and recovering the selective solvent in a solvent recovery zone, which process comprises: separating the hydrocarbon mixture, in an extractive distillation zone, into a top product which contains the less soluble hydrocarbons and an extract which contains the more soluble hydrocarbons and the selective solvent, bringing the extract taken off the extractive distillation zone to a higher pressure than the pressure in the extractive distillation zone, heating the extract which is under this higher pressure in a heat exchange zone, by indirect heat exchange with the selective solvent obtained as the bottom product from the solvent recovery zone, subjecting the heated extract to a flash evaporation and letting down the heated extract, in the flash evaporation, to a pressure which is at least equal to the pressure in the extractive distillation zone and is higher than the pressure in the solvent recovery zone, recycling the vapor component of the extract obtained from the flash evaporation to the extractive distillation zone whilst the liquid phase remaining after the flash evaporation is fed to the solvent recovery zone, separating the liquid phase obtained from the flash evaporation in the solvent recovery zone into a product containing the hydrocarbons and, as the bottom product, the selective solvent which has been freed from the hydrocarbons, recycling the resulting selective solvent via the heat exchange zone to the extractive distillation zone, and recycling the product which is obtained from the solvent recovery zone and contains the hydrocarbons partially or, where appropriate,completely to the extractive distillation zone, after increasing the pressure in a compression zone.
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公开(公告)号：CA1091897A
公开(公告)日：1980-12-23
申请号：CA272392
申请日：1977-02-21
Applicant: BASF AG
Inventor： KUESSNER KLAUS , IRNICH RUDOLF , SCHARPENBERG HANS-GEORG , VOLKAMER KLAUS
Abstract: Acid constituents, eg. H2S and CO2 or their mixtures, are removed from industrial gases or natural gases by means of a washing agent which contains the unsymmetrical methyl isopropyl ethers of polyethylene glycols. The washing can be carried out with simultaneous drying of the gas , especially in the case of natural gases, since the anhydrous ethers are able to absorb water.
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公开(公告)号：RO75221A
公开(公告)日：1980-11-30
申请号：RO9416878
申请日：1978-05-25
Applicant: BASF AG
Inventor： STOCKBURGER DICTER , VOLKAMER KLAUS , BENDER DETLEF , SCHNEIDER KLAUS J , SCHSENTKAR HARALD , WAGNER ULRICH , HEITZ HANS M
Abstract: A process for separating, by means of a selective solvent, a mixture of C4-hydrocarbons which contains some hydrocarbons which are more soluble in the selective solvent and some which are less soluble therein, in which process the hydrocarbon mixture is separated, in an extractive distillation zone, into a top product which contains the less soluble hydrocarbons and an extract which contains the more soluble hydrocarbons and the selective solvent, the extract, taken off as the bottom product, is subjected to a flash evaporation and the resulting vapor component of the extract is recycled to the extractive distillation zone while the liquid phase remaining after the flash evaporation is fed to a solvent recovery zone, in which the liquid phase obtained from the flash evaporation is separated into a product containing the hydrocarbons and, as the bottom product, the selective solvent which has been freed from the hydrocarbons, the resulting selective solvent is recycled to the extractive distillation zone and the product which is obtained from the solvent recovery zone and contains the hydrocarbons is partially or completely recycled to the extractive distillation zone, after increasing the pressure in a compression zone, in which process the extract taken off the extractive distillation zone is brought, prior to the flash evaporation to a higher pressure than the pressure in the extractive distillation zone and thereafter the extract which is under this higher pressure is heated, in a heat exchange zone, by indirect heat exchange with the selective solvent obtained as the bottom product from the solvent recovery zone, and the heated extract is subsequently let down, in the flash evaporation, to a pressure which is at least equal to the pressure in the extractive distillation zone and is higher than the pressure in the solvent recovery zone.
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Patent Agency Ranking
公开(公告)号：NO781842L
公开(公告)日：1978-11-29
申请号：NO781842
申请日：1978-05-26
Applicant: BASF AG
Inventor： STOCKBURGER DIETER , VOLKAMER KLAUS , BENDER DETLEF , SCHNEIDER KLAUS-JUERGEN , SCHWENTKER HARALD , WAGNER ULRICH , WEITZ HANS-MARTIN
Abstract: A process for separating, by means of a selective solvent, a mixture of C4-hydrocarbons which contains some hydrocarbons which are more soluble in the selective solvent and some which are less soluble therein, in which process the hydrocarbon mixture is separated, in an extractive distillation zone, into a top product which contains the less soluble hydrocarbons and an extract which contains the more soluble hydrocarbons and the selective solvent, the extract, taken off as the bottom product, is subjected to a flash evaporation and the resulting vapor component of the extract is recycled to the extractive distillation zone while the liquid phase remaining after the flash evaporation is fed to a solvent recovery zone, in which the liquid phase obtained from the flash evaporation is separated into a product containing the hydrocarbons and, as the bottom product, the selective solvent which has been freed from the hydrocarbons, the resulting selective solvent is recycled to the extractive distillation zone and the product which is obtained from the solvent recovery zone and contains the hydrocarbons is partially or completely recycled to the extractive distillation zone, after increasing the pressure in a compression zone, in which process the extract taken off the extractive distillation zone is brought, prior to the flash evaporation to a higher pressure than the pressure in the extractive distillation zone and thereafter the extract which is under this higher pressure is heated, in a heat exchange zone, by indirect heat exchange with the selective solvent obtained as the bottom product from the solvent recovery zone, and the heated extract is subsequently let down, in the flash evaporation, to a pressure which is at least equal to the pressure in the extractive distillation zone and is higher than the pressure in the solvent recovery zone.
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公开(公告)号：NO781842A
公开(公告)日：1978-11-29
申请号：NO781842
申请日：1978-05-26
Applicant: BASF AG
Inventor： STOCKBURGER DIETER , VOLKAMER KLAUS , BENDER DETLEF , SCHNEIDER KLAUS-JUERGEN , SCHWENTKER HARALD , WAGNER ULRICH , WEITZ HANS-MARTIN
CPC classification number: C07C7/08 , B01D3/40 , Y10S203/20
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公开(公告)号：NO163172C
公开(公告)日：1990-04-18
申请号：NO850923
申请日：1985-03-08
Applicant: BASF AG
Inventor： WERNER ECKHART , VOLKAMER KLAUS , HEFNER WERNER , WAGNER ULRICH
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公开(公告)号：NO160178C
公开(公告)日：1989-03-22
申请号：NO854706
申请日：1985-11-25
Applicant: BASF AG
Inventor： WAGNER ECKHART , VOLKAMER KLAUS , HEFNER WERNER , WAGNER ULRICH , SCHUBERT FRANZ
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公开(公告)号：NO155444C
公开(公告)日：1987-04-01
申请号：NO821058
申请日：1982-03-30
Applicant: BASF AG
Inventor： WAGNER ECKHART , WAGNER ULRICH , VOLKAMER KLAUS , VODRAZKA WOLFGANG
Abstract: A process for removing condensable aliphatic hydrocarbons and acidic gases such as H2S, CO2 and COS from natural gas containing these, wherein the natural gas is initially treated with polyethylene glycol dialkyl ethers, as the solvent, in a first absorption stage to effect absorption of the condensable aliphatic hydrocarbons; the natural gas drawn off from the first absorption stage is then treated with polyethylene glycol dialkyl ethers, as the solvent, under superatmospheric pressure in a second absorption stage, the acidic gases being completely or partly absorbed; the solvent charged with the condensable aliphatic hydrocarbons which is obtained from the first absorption stage is treated with water in an extraction stage, to form a hydrocarbon phase containing the condensable aliphatic hydrocarbons and an aqueous dialkyl ether phase, and the hydrocarbon phase is separated from the aqueous dialkyl ether phase. The solvent charged with acid gases which is obtained from the second absorption stage is regenerated by expansion and/or stripping in a regeneration stage and the regenerated solvent is recycled to the absorption.
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