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公开(公告)号：NO801034L
公开(公告)日：1980-10-13
申请号：NO801034
申请日：1980-04-10
Applicant: BASF AG
Inventor： WOLF DIETER , SCHMIDT RUDOLF , BLOCK ULRICH , SCHOENMAKERS HARTMUT , BOTT KASPAR , KAIBEL GERD
IPC: C07C27/02 , C07C53/02 , C07C51/00 , C07C51/09 , C07C51/42 , C07C51/44 , C07C51/48 , C07C67/00 , C07C
Abstract: Anhydrous or substantially anhydrous formic acid is obtained by hydrolysis of methyl formate, in a process wherein (a) methyl formate is hydrolyzed, (b) the methanol and excess methyl formate are distilled from the hydrolysis mixture obtained, (c) the bottom product of distillation (b), consisting of formic acid and water, is extracted, in a liquid-liquid extraction, with an extractant which in the main takes up the formic acid, (d) the resulting extract phase, consisting of formic acid, the extractant and a part of the water, is subjected to distillation, (e) the top product obtained from this distillation and consisting of all or part of the water introduced into the distillation, and part of the formic acid, is recycled, as vapor, into the lower part of the distillation column of stage (b), (f) the bottom product of distillation stage (d), consisting of the extractant, with or without part of the water, and the greater part of the formic acid, is separated by distillation into anhydrous or substantially anhydrous formic acid and the extractant, and (g) the extractant leaving stage (f) is recycled to the process.
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公开(公告)号：DE502004003404D1
公开(公告)日：2007-05-16
申请号：DE502004003404
申请日：2004-04-05
Applicant: BASF AG
Inventor： PESCHEL WERNER , SCHOENMAKERS HARTMUT , ALTHAUS KLAUS , KIRCHNER TANJA , STAATZ HARTMUT
IPC: C07C231/24 , C07C233/05
Abstract: The invention relates to a process for distillatively purifying crude dimethylacetamide (crude DMAc) comprising DMAc, low boilers and high boilers 5 by removing the low boilers and the high boilers to obtain pure DMAc in one of the column configurations listed hereinbelow: (I) a main column (MC) with sidestream column (SC) or (II) a dividing wall column (DWC), which operating at least the main column (MC) in column configuration (I) and the dividing wall column (DWC) in column configuration (II) at a top pressure in the range from 0.5 to 1.8 bar absolute.
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公开(公告)号：DE10336555A1
公开(公告)日：2005-02-24
申请号：DE10336555
申请日：2003-08-05
Applicant: BASF AG
Inventor： BESTE YORK ALEXANDER , SCHOENMAKERS HARTMUT , ARLT WOLFGANG , SEILER MATTHIAS , JORK CARSTEN
Abstract: An extraction-rectification process produces a low-volatile sump fraction and ionic fluid, in a reaction in which the ionic fraction is used as an entrainer. The sump fraction is discharged to an evaporator stage operated at a pressure of less than 500 mbar, thereby separating most of the low-volatile fraction from the ionic fluid. The low-volatile content in the ionic fluid falls to less than 5% wt. Alternatively, the discharging sump fraction is surrendered to a stripper where it is exposed to an inert gas or super-heated steam at ambient pressure or less than 900 mbar. The ionic fluid is surrendered to a further stripper where it is exposed to an inert gas or super-heated steam at ambient pressure or less than 500 mbar. The inert gas is dry air. The ionic fluid yield is returned to the extraction-rectification column. An independent claim is included for a process to separate mixtures of polar and non-polar substances that form azeotropes, or have a narrow boiling point range.
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公开(公告)号：DE19933850A1
公开(公告)日：2001-01-25
申请号：DE19933850
申请日：1999-07-23
Applicant: BASF AG
Inventor： RIECHERS HARTMUT , HOEHN ARTHUR , SIMON JOACHIM , ORTMUND LANG , SCHOENMAKERS HARTMUT , RAULS MATTHIAS , CLAERBOUT KOEN
IPC: C07D487/08 , C07C209/84 , C07C209/86 , C07C211/10
Abstract: Preparation of a solution of pure triethylenediamine (TEDA) comprises vaporizing TEDA and passing the TEDA vapor into a liquid solvent. An Independent claim is also included for the preparation of pure TEDA by preparing the solution as above and crystallizing TEDA from this solution.
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公开(公告)号：NO152371C
公开(公告)日：1985-09-18
申请号：NO801034
申请日：1980-04-10
Applicant: BASF AG
Inventor： WOLF DIETER , SCHMIDT RUDOLF , BLOCK ULRICH , SCHOENMAKERS HARTMUT , BOTT KASPAR , KAIBEL GERD
Abstract: Anhydrous or substantially anhydrous formic acid is obtained by hydrolysis of methyl formate, in a process wherein (a) methyl formate is hydrolyzed, (b) the methanol and excess methyl formate are distilled from the hydrolysis mixture obtained, (c) the bottom product of distillation (b), consisting of formic acid and water, is extracted, in a liquid-liquid extraction, with an extractant which in the main takes up the formic acid, (d) the resulting extract phase, consisting of formic acid, the extractant and a part of the water, is subjected to distillation, (e) the top product obtained from this distillation and consisting of all or part of the water introduced into the distillation, and part of the formic acid, is recycled, as vapor, into the lower part of the distillation column of stage (b), (f) the bottom product of distillation stage (d), consisting of the extractant, with or without part of the water, and the greater part of the formic acid, is separated by distillation into anhydrous or substantially anhydrous formic acid and the extractant, and (g) the extractant leaving stage (f) is recycled to the process.
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Patent Agency Ranking
公开(公告)号：CA1135282A
公开(公告)日：1982-11-09
申请号：CA348294
申请日：1980-03-24
Applicant: BASF AG
Inventor： WOLF DIETER , SCHMIDT RUDOLF , BLOCK ULRICH , SCHOENMAKERS HARTMUT , BOTT KASPAR , KAIBEL GERD
Abstract: of the disclosure: Anhydrous or substantially anhydrous formic acid is obtained by hydrolysis of methyl formate, in a process wherein a) methyl formate is hydrolyzed, b) the methanol and excess methyl formate are distilled from the hydrolysis mixture obtained, c) the bottom product of distillation (b), consisting of formic acid and water, is extracted, in a liquid-liquid extraction, with an extractant which in the main takes up the formic acid, d) the resulting extract phase, consisting of formic acid, the extractant and a part of the water, is subjected to distillation, e) the top product obtained from this distillation and consisting of all or part of the water introduced into the distillation, and part of the formic acid, is recycled, as vapor, into the lower part of the distillation column of stage (b), f) the bottom product of distillation stage (d), consisting of the extractant, with or without part of the water, and the greater part of the formic acid, is separated by distillation into anhydrous or substantially anhydrous formic acid and the extractant, and e) the extractant leaving stage (f) is recycled to the process.
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公开(公告)号：AU5729680A
公开(公告)日：1980-10-16
申请号：AU5729680
申请日：1980-04-10
Applicant: BASF AG
Inventor： WOLF DIETER , SCHOENMAKERS HARTMUT , BOTT KASPAR , KAIBEL GERD , SCHMIDT RUDOLF , BLOCK ULRICH
Abstract: Anhydrous or substantially anhydrous formic acid is obtained by hydrolysis of methyl formate, in a process wherein (a) methyl formate is hydrolyzed, (b) the methanol and excess methyl formate are distilled from the hydrolysis mixture obtained, (c) the bottom product of distillation (b), consisting of formic acid and water, is extracted, in a liquid-liquid extraction, with an extractant which in the main takes up the formic acid, (d) the resulting extract phase, consisting of formic acid, the extractant and a part of the water, is subjected to distillation, (e) the top product obtained from this distillation and consisting of all or part of the water introduced into the distillation, and part of the formic acid, is recycled, as vapor, into the lower part of the distillation column of stage (b), (f) the bottom product of distillation stage (d), consisting of the extractant, with or without part of the water, and the greater part of the formic acid, is separated by distillation into anhydrous or substantially anhydrous formic acid and the extractant, and (g) the extractant leaving stage (f) is recycled to the process.
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公开(公告)号：DE102004056672A1
公开(公告)日：2006-06-01
申请号：DE102004056672
申请日：2004-11-24
Applicant: BASF AG
Inventor： BESTE YORK ALEXANDER , EGGERSMANN MARKUS , SCHOENMAKERS HARTMUT
Abstract: Processes for chemical reaction and separation in a column comprising, (a) providing one or more reactants to a column; and (b) carrying out at least partially superimposed reactive distillation and extractive distillation on the one or more reactants in the column to form a reaction product mixture comprising at least two components and separate at least one of the components; wherein an ionic liquid is present in the column.
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公开(公告)号：DE10336556A1
公开(公告)日：2005-03-10
申请号：DE10336556
申请日：2003-08-05
Applicant: BASF AG
Inventor： BESTE YORK ALEXANDER , SCHOENMAKERS HARTMUT
Abstract: A process for separating azeotropic or close-boiling mixtures by means of an extractive rectification in which an ionic liquid is used as entrainer, wherein a high boiling bottom product is taken off from the column in vapor form via a side offtake.
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公开(公告)号：DE19962455A1
公开(公告)日：2001-06-28
申请号：DE19962455
申请日：1999-12-22
Applicant: BASF AG
Inventor： RIECHERS HARTMUT , HOEHN ARTHUR , SIMON JOACHIM , LANG ORTMUND , SCHOENMAKERS HARTMUT , RAULS MATTHIAS , CLAERBOUT KOEN
IPC: C07D487/08
Abstract: Preparation of a solution of pure triethylenediamine (TEDA) comprises vaporizing TEDA and passing the TEDA vapor into a liquid solvent. An Independent claim is also included for the preparation of pure TEDA by preparing the solution as above and crystallizing TEDA from this solution.
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