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公开(公告)号：AU528657B2
公开(公告)日：1983-05-05
申请号：AU5729680
申请日：1980-04-10
Applicant: BASF AG
Inventor： WOLF DIETER , BOTT KASPAR , KAIBEL GERD , SCHMIDT RUDOLF , BLOCK ULRICH , SCHOENMAKERS HARTMUT
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：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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Patent Agency Ranking
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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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：NO152371B
公开(公告)日：1985-06-10
申请号：NO801034
申请日：1980-04-10
Applicant: BASF AG
Inventor： WOLF DIETER , SCHMIDT RUDOLF , BLOCK ULRICH , SCHOENMAKERS HARTMUT , BORR 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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公开(公告)号：NO801034A
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
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