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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：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：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：DE2923012A1
公开(公告)日：1980-12-18
申请号：DE2923012
申请日：1979-06-07
Applicant: BASF AG
Abstract: A process for simultaneously removing water and hydrogen sulfide from gases containing both of these by treating the gases, in an absorption zone under superatmospheric pressure, with polyethylene glycol dialkyl ethers as a solvent, stripping the hydrogen sulfide from the loaded solvent, obtained from the absorption zone, in a desorption zone, removing the water, taken up in the absorption zone, from the solvent and recycling the regenerated solvent to the absorption zone, wherein the solvent additionally contains from 0.01 to 20% by weight, based on the solvent mixture, of an alcohol or ether boiling in the range from 50 DEG to 140 DEG C.
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公开(公告)号：DE2724365A1
公开(公告)日：1978-11-30
申请号：DE2724365
申请日：1977-05-28
Applicant: BASF AG
Inventor： STOCKBURGER DIETER DIPL ING DR , VOLKAMER KLAUS DIPL CHEM DR , BENDER DETLEF DIPL ING DR , SCHNEIDER KLAUS-JUERGEN DIPL I , SCHWENTKER HARALD DIPL CHEM DR , WAGNER ULRICH DIPL PHYS DR , WEITZ HANS-MARTIN DIPL CHEM DR
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：DE3112661A1
公开(公告)日：1982-10-14
申请号：DE3112661
申请日：1981-03-31
Applicant: BASF AG
Inventor： WAGNER ECKHART DIPL CHEM DR , WAGNER ULRICH DIPL PHYS DR , VOLKAMER KLAUS DIPL CHEM DR , VODRAZKA WOLFGANG DIPL CHEM DR
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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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：DE2634785A1
公开(公告)日：1978-02-09
申请号：DE2634785
申请日：1976-08-03
Applicant: BASF AG
Inventor： SCHUMACHER VOLKER DIPL CHEM DR , MAGNUSSEN PETER DIPL CHEM DR , WAGNER ULRICH DIPL PHYS DR
Abstract: A reaction column contains intermediate sieve plates whose spacing is less than twice the column dia. and whose total hole area is 10-40% of the column cross-section. Specifically, bubbling type gas-liquid reaction column is subdivided internally by sieve plates which are arranged in a demountable module for easy replacement. Each plate is of double construction so that by relative rotation of the two parts the available hole opening may be adjusted to suit the characteristics of the reacting system. The individual hole dia. is pref. >10mm, and the holes are circular; in a 400 mm i/d column the plate spacing is >=200 mm. Used for continuous chemical reaction between counter-flowing gas and liq. or slurry streams, in columns of dia. >400 mm. Reduces back-mixing effect without the complexity of column packing and without the need for reaction systems in cascade.
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