公开(公告)号：FR2552426A1

公开(公告)日：1985-03-29

申请号：FR8414519

申请日：1984-09-21

Applicant: BASF AG

Inventor： WICKENHAEUSER GERHARD ,  HEIDA BERND ,  GRAF FRITZ ,  HUPFER LEOPOLD

IPC: C07C59/153 ,  C07C51/00 ,  C07C51/48 ,  C07C67/00

Abstract: Aqueous glyoxylic acid solutions, essentially free of other acids, are recovered from aqueous solutions which still contain other acids, by a method in which the aqueous solution is mixed with an organic nitrogen compound at as high as 50 DEG C., the phases are separated, and the glyoxylic acid is extracted from the organic phase with water, at a higher temperature.

公开(公告)号：CA2549063C

公开(公告)日：2012-08-21

申请号：CA2549063

申请日：2005-02-04

Applicant: BASF AG

Inventor： HEIDA BERND

IPC: C07C7/08 ,  C07C11/167

Abstract: The invention relates to a method for obtaining raw-1,3-butadiene by extractive distillation with a selective solvent from a C4-fraction, containing C4-acetylenes as secondary components, in a partition column (TK) with a bottom evaporator (V1) inside of which a partition (T) is arranged in longitudinal direction of the column while forming a first partial area (A), a second partial area (B) and a lower shared column area (C), and to which an extractive wash column (K) is connected upstream therefrom. The invention is characterized in that the supply of energy into the partition column (TK) via the bottom evaporator (V1) is controlled in such a manner that a bottom flow (17) is drawn out from the partition column (TK), this bottom flow containing solvent loaded with C4-acetylenes whose proportion of 1,3-butadiene is limited in order to render the loss of 1,3-butadiene economically acceptable. The invention is also characterized in that the bottom flow (17) is fed to an acetylene degassing device (AG) and, inside this acetylene degassing device (AG), the C4-acetylenes are stripped out via the top and purified solvent is obtained in the form of a bottom flow (27).

公开(公告)号：AU2004259076B2

公开(公告)日：2011-02-24

申请号：AU2004259076

申请日：2004-07-22

Applicant: BASF AG

Inventor： HEIDA BERND

IPC: C07C7/08

Abstract: A process for fractionating a crude C4 fraction comprising butanes, butenes, 1,3-butadiene and small amounts of other hydrocarbons including C4-acetylenes, by extractive distillation using a selective solvent, wherein the crude C4 fraction (1) is fed into the middle region of a first extractive distillation column (K I) and the selective solvent (2) is fed into the column at a point above that at which the crude C4 fraction (1) is introduced and a gaseous side stream (3) which comprises the C4-acetylenes together with predominantly the selective solvent and in which the concentration of the C4-acetylenes is below the spontaneous decomposition limit is taken off from the first extractive distillation column (K I) at a point below the feed point for the crude C4 fraction (1) and an overhead stream (5) comprising the components which are less soluble than the C4-acetylenes in the selective solvent is taken off from the top of the first extractive distillation column, is proposed.

公开(公告)号：PL206533B1

公开(公告)日：2010-08-31

申请号：PL37366303

申请日：2003-07-23

Applicant: BASF AG

Inventor： HILL THOMAS ,  KINDLER KLAUS ,  HEIDA BERND

IPC: C07C7/08 ,  C07C11/167

公开(公告)号：AT384030T

公开(公告)日：2008-02-15

申请号：AT03771072

申请日：2003-07-23

Applicant: BASF AG

Inventor： HILL THOMAS ,  KINDLER KLAUS ,  HEIDA BERND

IPC: C07C7/08 ,  C07C11/167

Abstract: Sudstituted the abstract with a new abstract as follows: The invention relates to a continuous process for separation a mixture of hydrocarbons which has beenobtained by extractive distillation of C 4 fraction useing a selective solvent and the hydrocarbons from the fraction C 4 which are more readily soluble in the selective solvent than are the butanes and the butenes. The mixture is fed into a first distillation column in which it is separated into a steam which is taken off at the top and comprises 1,3-butadiene, propyne, possibly further low boilers and possibly water and a bottom stream comprising 1,3-butadiene, 1,2-butadiene, acetylenes and possibly further high boilers, with the proportion of 1,3-butadiene in the bottom stream from the distillatin column being regulated in such a way that it is at least sufficiently high to dilute the acetylenes to outside the range in which there is a risk of spontaneous decomposition. The stream taken off from the top of the first distillation column is fed to a second distillation column and is separated into a steam which is taken off at the top and comprises propyne, possibly further low boilers and possibly water and a bottom stream comprising pure 1,3-butadiene in the second distillation column.

公开(公告)号：PL377468A1

公开(公告)日：2006-02-06

申请号：PL37746803

申请日：2003-12-11

Applicant: BASF AG

Inventor： HEIDA BERND

IPC: B01D3/40 ,  C07C7/08

公开(公告)号：AU2005210003A1

公开(公告)日：2005-08-18

申请号：AU2005210003

申请日：2005-02-04

Applicant: BASF AG

Inventor： HEIDA BERND

IPC: C07C7/08

Abstract: 1,3-butadiene is obtained by extractive distillation with a selective solvent from a C4 cut comprising C4 acetylenes as secondary components in a dividing wall column having a bottom evaporator, in which a dividing wall is disposed in the longitudinal direction of the column to form a first subregion, a second subregion and a lower combined column region. The column is disposed upstream of an extractive wash column. The energy input into the dividing wall column via the bottom evaporator is controlled in such a way that a bottom stream containing solvent, C4 acetylenes and 1,3-butadiene restricted such that the loss of 1,3-butadiene is economically acceptable, is drawn off and fed to an acetylenes outgasser where the C4 acetylenes are stripped out overhead and purified solvent is obtained as the bottom stream.

公开(公告)号：BR0312894A

公开(公告)日：2005-06-14

申请号：BR0312894

申请日：2003-07-23

Applicant: BASF AG

Inventor： HILL THOMAS ,  KINDLER KLAUS ,  HEIDA BERND

IPC: C07C7/08 ,  C07C11/167

Abstract: Sudstituted the abstract with a new abstract as follows: The invention relates to a continuous process for separation a mixture of hydrocarbons which has beenobtained by extractive distillation of C 4 fraction useing a selective solvent and the hydrocarbons from the fraction C 4 which are more readily soluble in the selective solvent than are the butanes and the butenes. The mixture is fed into a first distillation column in which it is separated into a steam which is taken off at the top and comprises 1,3-butadiene, propyne, possibly further low boilers and possibly water and a bottom stream comprising 1,3-butadiene, 1,2-butadiene, acetylenes and possibly further high boilers, with the proportion of 1,3-butadiene in the bottom stream from the distillatin column being regulated in such a way that it is at least sufficiently high to dilute the acetylenes to outside the range in which there is a risk of spontaneous decomposition. The stream taken off from the top of the first distillation column is fed to a second distillation column and is separated into a steam which is taken off at the top and comprises propyne, possibly further low boilers and possibly water and a bottom stream comprising pure 1,3-butadiene in the second distillation column.

公开(公告)号：MXPA05000491A

公开(公告)日：2005-03-23

申请号：MXPA05000491

申请日：2003-07-22

Applicant: BASF AG

Inventor： HEIDA BERND

IPC: B01D3/40 ,  C07C5/22 ,  C07C7/08

Abstract: En un proceso continuo para fraccionar una fraccion (C4) de C4 mediante destilacion extractiva usando un solvente (LM) selectivo en una columna (EDK) de destilacion extractiva, se propone que se instale una pared divisoria (TW) en la direccion longitudinal en la columna (EDK) de destilacion extractiva para formar una primera (A) region, una segunda region (B) y una region (C) combinada inferior de la columna y una corriente (C4H8) superior que comprende los butanos se saca desde la primera region (A), una corriente (C4H8) superior que comprende los butenos se saca desde la segunda region (B) y una corriente (C4H8) que comprende los hidrocarburos de la fraccion de C4 los cuales son mas solubles en el solvente (LM) selectivo de lo que son los butanos y los butenos se sacan desde la region (C) combinada inferior de la columna.

公开(公告)号：DE10333756A1

公开(公告)日：2005-02-17

申请号：DE10333756

申请日：2003-07-24

Applicant: BASF AG

Inventor： HEIDA BERND

IPC: C07C7/08 ,  C07C11/16 ,  C07C11/22

Abstract: A process for fractionating a crude C4 fraction comprising butanes, butenes, 1,3-butadiene and small amounts of other hydrocarbons including C4-acetylenes, by extractive distillation using a selective solvent, wherein the crude C4 fraction (1) is fed into the middle region of a first extractive distillation column (K I) and the selective solvent (2) is fed into the column at a point above that at which the crude C4 fraction (1) is introduced and a gaseous side stream (3) which comprises the C4-acetylenes together with predominantly the selective solvent and in which the concentration of the C4-acetylenes is below the spontaneous decomposition limit is taken off from the first extractive distillation column (K I) at a point below the feed point for the crude C4 fraction (1) and an overhead stream (5) comprising the components which are less soluble than the C4-acetylenes in the selective solvent is taken off from the top of the first extractive distillation column, is proposed.