公开(公告)号：CA1142554A

公开(公告)日：1983-03-08

申请号：CA355096

申请日：1980-06-30

Applicant: BASF AG

Inventor： BRUNNER ERWIN ,  SCHUBERT ECKART ,  LINDNER ALFRED ,  MERGER FRANZ ,  VOLKAMER KLAUS ,  SANDROCK GERHARD ,  STROHMEYER MAX

IPC: C07C1/00 ,  C07C7/148 ,  C07C11/09 ,  C07C41/06 ,  C07C67/00

Abstract: The present invention is concerned with a process for obtaining isobutene from a C4-hydrocarbon mixture containing isobutene, which comprises the steps for reacting the mixture continuously with a primary C3-or C4-alcohol in the presence of an ion exchanger in its acid form as a condensing agent to form the corresponding C3- or C4-alkyl tert-butyl ether by feeding the primary C3- or C4-alcohol and the C4hydrocarbon mixture with or without prior mixing, to an etherification reaction zone which contains the ion exchanger, while maintaining the exit temperature of the reaction mixture from the etherification reaction zone at from 25 to 65.degree.C and the quotient of the volume of the etherification reaction zone and the throughput of the C4-hydrocarbon mixture and the primary C3- or C4-alcohol at from 0.01 to 5 hours; distilling the reaction mixture obtained from the etherification reaction zone in a first distillation zone, taking off as the top product without water washing a C4-hydrocarbon mixture comprising the unconverted hydrocarbons and not more than 1,000 ppm by weight of the primary C3- or C4-alcohol and taking off as the bottom product the resulting C3- or C4alkyl tert-butyl ether, which may contain therein primary C3- or C4-alcohol which may have been added in excess; feeding the bottom product to a second reaction zone, containing an acid catalyst, in which the C3- or C4-alkyl tert-butyl ether is decomposed at an elevated temperature to give isobutene and primary C3- and C4-alcohol; feeding the mixture of isobutene and primary C3- and C4-alcohol produced in the decomposition step to a second distillation zone, taking off as the top product without a water wash isobutene containing not more than 500 ppm by weight of primary C3-or C4alcohol and taking off as the bottom product the remaining primary C3- or C4-alcohol produced in step (c); and recycling the primary C3- or C4-alcohol which is the bottom product of step (d) to the etherification reaction zone.

公开(公告)号：AU3861778A

公开(公告)日：1980-02-07

申请号：AU3861778

申请日：1978-08-03

Applicant: BASF AG

Inventor： STOCKBURGER DIETER ,  VOLKAMER KLAUS ,  BENDER DETLEF ,  SCHNEIDER KLAUS-JUERGEN ,  SCHWENTKER HARALD ,  WAGNER ULRICH ,  WEITZ HANS-MARTIN

IPC: C07C7/08 ,  C07C11/16

公开(公告)号：NO161039C

公开(公告)日：1989-06-28

申请号：NO840862

申请日：1984-03-07

Applicant: BASF AG

Inventor： WAGNER ECKHART ,  VOLKAMER KLAUS ,  HEFNER WERNER ,  WAGNER ULRICH

IPC: C10L3/10 ,  B01D53/14 ,  B01D53/34 ,  C07C7/11 ,  C10K1/14

Abstract: CO2 and/or H2S are removed from gases which contain CO2 and/or H2S by means of an aqueous absorption liquid containing an alkanolamine, by a process wherein the said gas is treated, in an absorption stage, at from 40 DEG to 100 DEG C., with an aqueous absorption liquid containing from 20 to 70% by weight of methyldiethanolamine, the treated gas is taken off at the top of the absorption stage, the aqueous absorption liquid laden with CO2 and/or H2S is taken off at the bottom of this stage and is regenerated by being let down in two or more flash stages, and the final flash stage is operated under reduced pressure and the regenerated absorption liquid is recycled to the absorption stage.

公开(公告)号：CA1251473A

公开(公告)日：1989-03-21

申请号：CA487567

申请日：1985-07-26

Applicant: BASF AG

Inventor： HOELDERICH WOLFGANG ,  LINDNER ALFRED ,  MROSS WOLF D ,  STROHMEYER MAX ,  VOLKAMER KLAUS

IPC: C07C1/00 ,  C07C5/25 ,  C07C7/04 ,  C07C11/08 ,  C07C67/00

Abstract: But-2-enes are obtained from C4-hydrocarbon mixtures which contain but-1-ene and may or may not contain but-2-enes by catalytic isomerization of the but-1-ene to but-2-enes in an isomerization zone at elevated temperatures by a process in which the isomerization is carried out in combination with a distillative separation zone, the said hydrocarbon mixture being fed to the isomerization zone and/or distillative separation zone, the isomerization mixture obtained from the isomerization zone is passed into the distillative separation zone, a but-1-ene-containing fraction is removed above the lower third of the distillative separation zone and passed into the isomerization zone, and the but-2-enes or a fraction containing these are or is removed in the lower third of the distillative separation zone.

公开(公告)号：CA1222529A

公开(公告)日：1987-06-02

申请号：CA457292

申请日：1984-06-22

Applicant: BASF AG

Inventor： HOELDERICH WOLFGANG ,  LINDNER ALFRED ,  MROSS WOLF D ,  SCHWARZMANN MATTHIAS ,  VOLKAMER KLAUS ,  WAGNER ULRICH

IPC: B01J29/00 ,  B01J29/04 ,  C07B61/00 ,  C07C1/00 ,  C07C5/22 ,  C07C5/25 ,  C07C11/02 ,  C07C67/00 ,  C07C5/23 ,  C07C11/08

Abstract: The invention relates to a process for the valence isomerization of an olefin in the presence of a catalyst at elevated temperatures, wherein the said isomerization is carried out in the presence of a pentasil-type zeolite as the catalyst. It is possible with this process to achieve better times-on-stream and selectivities of the catalyst than can be obtained with the conventional processes.

公开(公告)号：CA1220757A

公开(公告)日：1987-04-21

申请号：CA470880

申请日：1984-12-21

Applicant: BASF AG

Inventor： LINDNER ALFRED ,  VOLKAMER KLAUS ,  HOFFMANN HERWIG ,  SANDROCK GERHARD

IPC: C07C1/00 ,  C07C7/04 ,  C07C7/08 ,  C07C9/10 ,  C07C11/08 ,  C07C67/00

Abstract: A C4-hydrocarbon mixture which contains hydrocarbons which are more readily soluble in the selective solvent and those which are more sparingly soluble in the said solvent is separated with the aid of a selective solvent by a process in which the C4-hydrocarbon mixture is separated, in an extractive distillation zone, into a top product (distillate), which contains the more sparingly soluble hydrocarbons, and an extract containing the more readily soluble hydrocarbons and the selective solvent, the extract taken off as the bottom product is fed to a solvent recovery zone, in which the extract is separated into a product containing the hydrocarbons, and the selective solvent which has been partially or completely freed from the hydrocarbons, and the concentration, based on the C4-hydrocarbon/selective solvent mixture formed in the extractive distillation zone, of the selective solvent in the said zone falls below 75% by weight on one or more trays or, in the case of packed extractive distillation columns, at one or more points within the packing.

公开(公告)号：ZA852332B

公开(公告)日：1985-12-24

申请号：ZA852332

申请日：1985-03-28

Applicant: BASF AG

Inventor： VOLKAMER KLAUS ,  HEFNER WERNER ,  WAGNER ECKHART ,  WAGNER ULRICH

IPC: C10L3/10 ,  B01D53/14 ,  B01D53/40 ,  B01D53/77 ,  C10K1/14 ,  B01D ,  B01J ,  C01B ,  C10K ,  C10L

公开(公告)号：AU4050285A

公开(公告)日：1985-10-03

申请号：AU4050285

申请日：1985-03-28

Applicant: BASF AG

Inventor： VOLKAMER KLAUS ,  HEFNER WERNER ,  WAGNER ECKHART ,  WAGNER ULRICH

IPC: B01D53/14

Abstract: 1. A process for removing CO2 and/or H2 S from a gas containing CO2 and/or H2 S by washing the gas with an aqueous alkanolamine-containing absorption liquid and subsequently regenerating the latter, wherein the aqueous absorption liquid used contains from 3 to 60% by weight of methyldiethanolamine and from 1 to 50% by weight of monoethanolamine, processes with two absorption stages arranged in series, in which regeneration of the laden absorption liquid is carried out using two flash stages and a stripping zone, to the extent they utilize an absorption liquid containing from 0.05 to 1 mole of monoethanolamine per litre, being excluded.

公开(公告)号：PT80177A

公开(公告)日：1985-04-01

申请号：PT8017785

申请日：1985-03-27

Applicant: BASF AG

Inventor： VOLKAMER KLAUS ,  HEFNER WERNER ,  WAGNER ECKHART ,  WAGNER ULRICH

IPC: B01D53/14 ,  B01D47/00

Abstract: 1. A process for removing CO2 and/or H2 S from a gas containing CO2 and/or H2 S by washing the gas with an aqueous alkanolamine-containing absorption liquid and subsequently regenerating the latter, wherein the aqueous absorption liquid used contains from 3 to 60% by weight of methyldiethanolamine and from 1 to 50% by weight of monoethanolamine, processes with two absorption stages arranged in series, in which regeneration of the laden absorption liquid is carried out using two flash stages and a stripping zone, to the extent they utilize an absorption liquid containing from 0.05 to 1 mole of monoethanolamine per litre, being excluded.

公开(公告)号：CA1178789A

公开(公告)日：1984-12-04

申请号：CA398578

申请日：1982-03-17

Applicant: BASF AG

Inventor： WAGNER ECKHART ,  WAGNER ULRICH ,  VOLKAMER KLAUS ,  VODRAZKA WOLFGANG

IPC: B01D53/14 ,  C07C7/11 ,  C07C9/04 ,  C10G5/04

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.