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    143.
    发明专利
    未知

    公开(公告)号：AT333927T

    公开(公告)日：2006-08-15

    申请号：AT01110116

    申请日：2001-05-03

    Applicant: BASF AG

    Inventor： RUST HARALD ,  KAIBEL GERD

    IPC: B01D3/14

    Abstract: Separating wall column comprises an upper column region (6), a feed part (7), a removal part (8) and a lower column region (9) as segments. The feed part and the removal part are separated from each other by a separating wall (10) fixed in the column. The separating wall is partially formed from an elastic material and has a low over-dimension with respect to its width. The wall is fixed in the column so that it exerts an elastic force on the inner casing of the column. Preferred Features: The separating wall is completely formed from an elastic material and is present as a one piece strip. The wall is made from PTFE or a corrosion resistant chromium-nickel high grade steel. The side edges of the wall have an angle of 20-60 degrees . The wall has a thickness of 0.05-1, preferably 0.1-0.3 mm.

    144.
    发明专利
    未知

    公开(公告)号：DE50206307D1

    公开(公告)日：2006-05-18

    申请号：DE50206307

    申请日：2002-01-08

    Applicant: BASF AG

    Inventor： GALL MARTIN ,  KAIBEL GERD ,  KRUG THOMAS ,  RUST HARALD ,  STEIN FRANK

    IPC: C07C29/80 ,  C07D309/30 ,  B01D3/14 ,  C07C31/20 ,  C07D315/00

    Abstract: A process for working up by distillation the crude products obtained in the process according to DE-A 196 07 954 and containing 1,6-hexanediol (HDO), 1,5-pentanediol (PDO) or caprolactone (CLO) in order to obtain the corresponding pure products, the working-up by distillation being carried out in each case in a dividing wall column (TK) in which a dividing wall (T) is arranged in the longitudinal direction of the column with formation of an upper common column region ( 1 ), a lower common column region ( 6 ), a feed section ( 2, 4 ) having a rectification section ( 2 ) and stripping section ( 4 ), and a take-off section ( 3, 5 ) having a stripping section ( 3 ) and rectification section ( 5 ), with feeding of the respective crude product HDO, PLO or CLO in the middle region of the feed section ( 2, 4 ) and removal of the high boiler fraction (C) from the bottom of the column, of the low boiler fraction (A) via the top of the column and of the medium boiler fraction (B) from the middle region of the take-off section ( 3, 5 ), or in thermally coupled columns.

    148.
    发明专利
    未知

    公开(公告)号：DE50102763D1

    公开(公告)日：2004-08-05

    申请号：DE50102763

    申请日：2001-09-19

    Applicant: BASF AG

    Inventor： KAIBEL GERD ,  OOST CARSTEN ,  STROEZEL MANFRED ,  MEYER GERALD ,  TRUEBENBACH PETER ,  SARTOR KARL-HEINZ ,  HENERS JUERGEN

    IPC: B01D3/14 ,  B01D3/32 ,  B01D3/42 ,  C07B63/00 ,  C10G7/00 ,  C10G7/02 ,  C10G7/12

    Abstract: A process is proposed for the separation of C 5+ cuts by distillation into a low-boiler (A), a medium-boiler (B) and a high-boiler fraction (C) in one or more dividing-wall columns (TK), in which a dividing wall (T) is arranged in the longitudinal direction of the column with formation of an upper, common column region ( 1 ), a lower, common column region ( 6 ), a feed part ( 2, 4 ) with rectifying section ( 2 ) and stripping section ( 4 ), and a withdrawal part ( 3, 5 ) with rectifying section ( 5 ) and stripping section ( 3 ), with feed of the C 5+ cut (A, B, C) into the central region of the feed part ( 2, 4 ), discharge of the high-boiler fraction (C) from the bottom of the column, discharge of the low-boiler fraction (A) via the top of the column, and discharge of the medium-boiler fraction (B) from the central region of the withdrawal part ( 3, 5 ), wherein the dividing ratio of the liquid reflux at the upper end of the dividing wall (T) is set in such a way that the proportion of high-boiling key components in the liquid reflux over the stripping section ( 3 ) of the withdrawal part at the upper end of the dividing wall (T) is from 10 to 80%, preferably from 30 to 50%, of the limit value allowed in the medium-boiler fraction (B), and wherein the heating power in the evaporator at the bottom of the dividing-wall column (TK) is set in such a way that the concentration of the low-boiling key components in the liquid at the lower end of the dividing wall (T) is from 10 to 80%, preferably from 30 to 50%, of the limit value allowed in the medium-boiler fraction (B).

    149.
    发明专利
    未知

    公开(公告)号：DE10231890B4

    公开(公告)日：2004-07-01

    申请号：DE10231890

    申请日：2002-07-12

    Applicant: BASF AG

    Inventor： KAIBEL GERD ,  MERGER MARTIN ,  DOMSCHKE THOMAS ,  DECKERT PETRA ,  SAUER FRIEDRICH

    IPC: C07D307/62 ,  C07C59/215

    Abstract: The invention relates to a method for the separation of ascorbic acid from a mixture containing ascorbic acid and 2-keto-L-gulonic acid in a polar, preferably aqueous solvent, by means of liquid/liquid extraction using an amide. The method preferably also comprises steps for the back-extraction of the ascorbic acid, recycling of the extraction solvent and/or the back extraction solvent and for isolation of the ascorbic acid from the back extraction solvent. The invention further relates to a method for the production of ascorbic acid from KGA and isolation of the ascorbic acid so produced.

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