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Patent Agency Ranking
公开(公告)号：KR810001632B1
公开(公告)日：1981-10-27
申请号：KR780001604
申请日：1978-05-26
Applicant: BASF AG
Inventor： BENDER D , STOKBURGER D , WAGNER U , VOLKAMER K , SCHWENTKER H
IPC: C07C7/00
Abstract: Sepn. of a C4-hydrocarbon mixt. is done by a series of 2 extn. columns(3),(5) with selective solvent. The withdrawn ext. is compressed from 3.5-7 to 6.5-22 bars fed to a heat exchanger, countercurrently heated by recycled solvent, and expanded. The gaseous phase, contg. 40-70% hydrocarbons, of the ext. is recycled into the extn. column, and the liq. phase is again expanded and fed into a solvent stripping column.
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公开(公告)号：BR7803386A
公开(公告)日：1979-01-02
申请号：BR7803386
申请日：1978-05-26
Applicant: BASF AG
Inventor： WEITZ H , BENDER D , VOLKAMER K , STOCKBURGER D , WAGNER U , SCHWENTKER H , SCHNEIDER K
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：SE7806079L
公开(公告)日：1978-11-29
申请号：SE7806079
申请日：1978-05-26
Applicant: BASF AG
Inventor： STOCKBURGER D , VOLKAMER K , BENDER D , SCHNEIDER K-J , SCHWENTKER H , WAGNER U , WEITZ H-M
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：SE427457B
公开(公告)日：1983-04-11
申请号：SE7806079
申请日：1978-05-26
Applicant: BASF AG
Inventor： STOCKBURGER D , VOLKAMER K , BENDER D , SCHNEIDER K-J , SCHWENTKER H , WAGNER U , WEITZ H-M
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：SE7806079A
公开(公告)日：1978-11-29
申请号：SE7806079
申请日：1978-05-26
Applicant: BASF AG
Inventor： STOCKBURGER D , VOLKAMER K , BENDER D , SCHNEIDER K-J , SCHWENTKER H , WAGNER U , WEITZ H-M
CPC classification number: C07C7/08 , B01D3/40 , Y10S203/20
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