公开(公告)号：DE10238145A1

公开(公告)日：2003-11-27

申请号：DE10238145

申请日：2002-08-15

Applicant: BASF AG

Inventor： DIEHL VOLKER ,  SUTORIS HEINZ FRIEDRICH ,  BECKMANN STEFAN

IPC: B01D3/14 ,  B01D3/34 ,  C07C51/44 ,  C07C67/54 ,  C07C57/075 ,  C07C57/07 ,  C07C67/62 ,  C07C69/54

Abstract: A process for the working-up of mixtures containing (meth)acrylic acid and/or (meth)acrylic acid ester in a column for distillation, rectification and/or fractional condensation in the presence of a polymerization inhibitor and an oxygen containing gas comprises at least partial dosing in of the oxygen containing gas in the upper part of the column. An Independent claim is included for a separating device (I) comprising a column for distillation, rectification and/or fractional condensation having effective separating inserts, at least one condenser at the head of the column and at least 2 possible means for removing product streams, further comprising at least one having an external connection for dosing in of gas in the upper part of the column, that is star-shaped or ring-shaped or comprises a number of concentric rings that are regularly or irregularly arranged.

公开(公告)号：BR9915230A

公开(公告)日：2001-07-31

申请号：BR9915230

申请日：1999-11-05

Applicant: BASF AG

Inventor： AICHINGER HEINRICH ,  HERBST HOLGER ,  NESTLER GERHAR ,  SCHROEDER JUERGEN ,  BECKMANN STEFAN

IPC: C07C67/08 ,  C07C67/327 ,  C07C67/60 ,  C07C69/54

Abstract: In a process for esterifying (meth)acrylic acid with an alkanol in the presence of an esterification catalyst, in which unconverted starting compounds and (meth)acrylic ester to be formed are separated off by distillation and an oxyester-containing bottom product is formed, the bottom product is first separated off and then the oxyesters contained in it are cleaved in the presence of a relatively long-chain alkylbenzenesulfonic acid at elevated temperatures.

公开(公告)号：CA2283894A1

公开(公告)日：1998-12-30

申请号：CA2283894

申请日：1998-06-10

Applicant: BASF AG

Inventor： PLESNIVY THOMAS ,  BECK KARL ,  GEHRER EUGEN ,  REICHELT HELMUT ,  BECKMANN STEFAN ,  OPPER WALTER ,  FRIEDRICH KLAUS

IPC: B01J21/16 ,  B01J23/28 ,  B01J23/30 ,  B01J23/888 ,  B01J23/889 ,  C07C315/00 ,  C07C317/14

Abstract: The invention relates to a method for producing 4,4'-dihalogendiphenylsulfone by reacting halogenated benzene with 4-halogenphenylsulfonyl chloride in a liquid phase at high temperature, in the presence of a solid catalyst having acid centers. The method is characterized in that the reaction of 4halogenphenylsulfonyl chloride with formula (I), in which X is chlorine, bromine or fluorine, with chlorobenzene, bromobenzene, or fluorobenzene, is carried out in the presence of a catalyst which is selected from one of the following groups: K1) catalysts consisting of essentially stratified silicates not having Lewis acids and having proton-saturated negative layer loads, or containing these as a basic component; K2) catalysts consisting of zeolites in the acid H form, or containing these as a basic component; and K3) catalysts consisting of mixed oxides having acidic centres, or containing these as basic components. The mixed oxides consist of a combination of (a) titanium, circonium, hafnium, tin, iron or Cr(III) oxides on the one hand, and (b) vanadium, chromium(VI), molybdenum, wolfram or scandium oxides on the other hand; or the mixed oxides are sulfatized or phosphatized oxides of the group (a), and said mixed oxides are calcined after combination, at temperatures of 450 to 800 ~C.

公开(公告)号：AT170638T

公开(公告)日：1998-09-15

申请号：AT95924250

申请日：1995-06-16

Applicant: BASF AG

Inventor： BECKMANN STEFAN ,  ETZBACH KARL-HEINZ ,  SENS RUEDIGER

IPC: G02F1/35 ,  C07D277/42 ,  C09B23/00 ,  C09B23/01 ,  C09B23/04 ,  C09B23/06 ,  C09B69/10 ,  G02F1/355 ,  G02F1/361

Abstract: PCT No. PCT/EP95/02328 Sec. 371 Date Dec. 24, 1996 Sec. 102(e) Date Dec. 24, 1996 PCT Filed Jun. 16, 1995 PCT Pub. No. WO96/00409 PCT Pub. Date Jan. 4, 1996Naphthalene derivatives of the formula where the rings A and B may be benzofused, X is nitrogen or a radical of the formula CH or CH=CH-CH, Z is a heterocyclic radical or additionally, when x is CH=CH-CH, a 5- or 6-membered aromatic carbocyclic radical, and R1, R2 and R3 are hydrogen, C1-C4-alkyl or C5-C7-cycloalkyl, are useful in nonlinear optics.

公开(公告)号：AU5551898A

公开(公告)日：1998-06-22

申请号：AU5551898

申请日：1997-11-11

Applicant: BASF AG

Inventor： GRUND CLEMENS ,  REICHELT HELMUT ,  SCHMIDT ANDREAS JOHANN ,  WURTHNER FRANK ,  SENS RUDIGER ,  BECKMANN STEFAN

IPC: B41M5/385 ,  B41M5/388 ,  B41M5/39 ,  C07D401/06 ,  C09B23/00 ,  C09B23/10 ,  D06P1/16 ,  D06P5/00 ,  D06P5/13 ,  G03G9/09 ,  A61K7/13 ,  B41M5/38 ,  G03C7/12 ,  G03G9/08