公开(公告)号：CZ33597A3

公开(公告)日：1997-09-17

申请号：CZ33597

申请日：1997-02-05

Applicant: BASF AG

Inventor： IFFLAND GABRIELE ,  DAMS ALBRECHT ,  WECK ALEXANDER ,  AICHINGER HEINRICH ,  HERBST HOLGER ,  NESTLER GERHARD ,  EXNER HERBERT

IPC: B01J27/02 ,  B01J31/02 ,  C07B41/12 ,  C07B61/00 ,  C07C67/08 ,  C07C67/54 ,  C07C69/54

公开(公告)号：ID16044A

公开(公告)日：1997-08-28

申请号：ID970559

申请日：1997-02-24

Applicant: BASF AG

Inventor： MACHHAMMER OTTO ,  DAMS ALBRECHT ,  ECK BERND ,  PROLL THEO

IPC: C07C57/04 ,  C07C51/43 ,  C07C57/05 ,  C07C57/07

Abstract: A process for purifying (meth)acrylic acid by phase separation techniques comprises the following steps: (a) a mixture containing (meth)acrylic acid is separated into distinct phases in the presence of an organic solvent, with the composition of the (meth)acrylic acid-rich phase remaining essentially unchanged, and this acid-rich phase is separated; (b) the remaining phase from step (a) is separated into indistinct phases; and (c) one of the phases from step (b) is returned to step (a). Also claimed is preparation of (meth)acrylic acid. Preferably in step (c) the acid-rich phase is returned to step (a). 1-100 (100) wt.% of the phase remaining from step (a) is used in step (b). Pure end product is added to steps (a) and (b). Step (a) involves crystallisation, freezing or sublimation, preferably static and/or dynamic crystallisation, and most preferably a combined static and dynamic crystallisation in which the residue from the dynamic crystallisation is added to the static crystallisation step and the crystallised product from the static crystallisation is returned to the dynamic crystallisation.

公开(公告)号：ID15885A

公开(公告)日：1997-08-14

申请号：ID970346

申请日：1997-02-05

Applicant: BASF AG

Inventor： DAMS ALBRECHT ,  AICHINGER HEINRICH ,  HERBST HOLGER ,  NESTLER GERHARD ,  EXNER HERBERT ,  IFFLAND GABRIELE ,  WECK ALEXANDER

IPC: B01J27/02 ,  B01J31/02 ,  C07B41/12 ,  C07B61/00 ,  C07C67/08 ,  C07C67/54 ,  C07C69/54

公开(公告)号：DE19604252A1

公开(公告)日：1997-08-07

申请号：DE19604252

申请日：1996-02-06

Applicant: BASF AG

Inventor： DAMS ALBRECHT ,  AICHINGER HEINRICH ,  HERBST HOLGER ,  NESTLER GERHARD ,  EXNER HERBERT ,  IFFLAND GABRIELE ,  WECK ALEXANDER

IPC: B01J27/02 ,  B01J31/02 ,  C07B41/12 ,  C07B61/00 ,  C07C67/08 ,  C07C67/54 ,  C07C69/54

公开(公告)号：AU2003294955A1

公开(公告)日：2004-08-10

申请号：AU2003294955

申请日：2003-12-24

Applicant: BASF AG

Inventor： DAMS ALBRECHT ,  THIEL JOACHIM ,  VANDENMERSCH HUGUES ,  SCHRODER JURGEN

IPC: C07C45/78 ,  C07C45/81 ,  C07C45/82 ,  C07C51/44 ,  C07C67/54 ,  C07C57/04 ,  C07C47/22 ,  C07C69/54

Abstract: In a thermal separating process between at least one gaseous and at least one liquid stream, of which at least one comprises (meth)acrylic monomers, in a separating column containing sieve trays as separating internals, at least some of the sieve trays are operated above an entrainment fraction of 10% by weight.

公开(公告)号：DE10300816A1

公开(公告)日：2004-07-22

申请号：DE10300816

申请日：2003-01-10

Applicant: BASF AG

Inventor： THIEL JOACHIM ,  VANDENMERSCH HUGUES ,  SCHROEDER JUERGEN ,  DAMS ALBRECHT

IPC: C07C45/78 ,  C07C45/81 ,  C07C45/82 ,  C07C51/44 ,  C07C67/54 ,  B01D3/14 ,  C07B63/00 ,  C07C57/075

Abstract: In a thermal separating process between at least one gaseous and at least one liquid stream, of which at least one comprises (meth)acrylic monomers, in a separating column containing sieve trays as separating internals, at least some of the sieve trays are operated above an entrainment fraction of 10% by weight.

公开(公告)号：DE10300499A1

公开(公告)日：2003-10-23

申请号：DE10300499

申请日：2003-01-08

Applicant: BASF AG

Inventor： THIEL JOACHIM ,  DAMS ALBRECHT ,  SCHROEDER JUERGEN

IPC: B01D3/14 ,  B01D5/00 ,  C07C45/81 ,  C07C45/82 ,  C07C51/43 ,  C07C51/44 ,  C07C67/54 ,  C07C57/07 ,  B01D3/00 ,  C07B63/00 ,  C07C45/90

Abstract: A process for the distillative separation of (meth)acrylic monomer containing liquids in a distillation column comprises direct cooling to form a condensate in a condensation chamber such that the direct cooling of the liquid is carried out in at least two separate spray zones arranged in series. A process for the distillative separation of (meth)acrylic monomer containing liquids in a distillation column (I) from the head of which (meth)acrylic monomer containing liquor is removed and directly cooled to form a condensate whereby the condensation chamber at the head of the column is separated from the region containing effective separating components of the distillation column by only one tray and is characterized in that the direct cooling of the liquid is carried out in at least two separate spray zones arranged in series by spraying of super cooled polymerization inhibitor containing head condensate whereby the temperature of the sprayed super cooled head condensate reduces from spray zone to spray zone. An Independent claim is included for the distillation column (I) comprising at least one tray and a spray condenser having at least two spray zones.

公开(公告)号：DE10127939A1

公开(公告)日：2002-05-29

申请号：DE10127939

申请日：2001-06-08

Applicant: BASF AG

Inventor： GEISENDOERFER MATTHIAS ,  DAMS ALBRECHT ,  NESTLER GERHARD

IPC: C07B61/00 ,  C07C67/54 ,  C07C213/06 ,  C07C213/10 ,  C07C219/08 ,  C07D211/94 ,  C07C219/02 ,  C07C27/00 ,  C07B41/12 ,  C07D227/12 ,  C07D295/04

Abstract: The invention relates to a method for producing (meth)acrylic acid esters IV by means of transesterification of a (meth)acrylic acid ester I with an alcohol R OH comprising at least one more carbon atom than the alcohol constituents (R O-) in the (meth)acrylic acid ester I to be subjected to transesterification, in the presence of a catalyst or a catalyst mixture. Either essentially the (meth)acrylic acid ester I is separated and then the catalyst used is separated by distillation (catalyst separation), or the catalyst used is separated by distillation first (catalyst separation), and then essentially the (meth)acrylic acid ester I is separated, from the reaction product of the transesterification. Constituents from the mixture obtained, which have a lower boiling point than the (meth)acrylic acid ester IV, are essentially separated by distillation (separation of constituents at low boiling point), and the (meth)acrylic acid ester IV is then purified by distillation (purification by distillation).

公开(公告)号：DE59704617D1

公开(公告)日：2001-10-18

申请号：DE59704617

申请日：1997-11-21

Applicant: BASF AG

Inventor： AICHINGER HEINRICH ,  FRIED MICHAEL ,  NESTLER GERHARD ,  DAMS ALBRECHT

IPC: C07C67/08 ,  C07C67/58 ,  C07C69/54

Abstract: A process is described for preparing (meth)acrylic esters by reacting (meth)acrylic acid with C4-C12-alkanols in the presence of sulfuric acid or a mono-C4-C12-alkyl sulfate as catalyst, where the catalyst is regenerated by extraction with water from the reaction mixture and the aqueous catalyst solution is recycled back to the esterification, the concentration of unreacted alkanol in the reaction mixture to be extracted being not more than 5% by weight, based on the reaction mixture to be extracted.

公开(公告)号：DE59704499D1

公开(公告)日：2001-10-11

申请号：DE59704499

申请日：1997-02-04

Applicant: BASF AG

Inventor： DAMS ALBRECHT ,  HERBST HOLGER ,  AICHINGER HEINRICH ,  NESTLER GERHARD ,  EXNER HERBERT

IPC: B01J27/02 ,  B01J31/02 ,  C07B41/12 ,  C07B61/00 ,  C07C67/08 ,  C07C67/54 ,  C07C69/54