公开(公告)号：BR0212483A

公开(公告)日：2004-08-24

申请号：BR0212483

申请日：2002-09-30

Applicant: BASF AG

Inventor： NESTLER GERHARD ,  SCHROEDER JUERGEN

IPC: B01J23/00 ,  B01J23/887 ,  B01J23/888 ,  B01J35/00 ,  C07C51/25

公开(公告)号：MX221394B

公开(公告)日：2004-07-12

申请号：MXPA01010787

申请日：2001-10-24

Applicant: BASF AG

Inventor： AICHINGER HEINRICH ,  NESTLER GERHARD ,  SCHROEDER JUERGEN

IPC: C08F2/01 ,  C08F2/02 ,  C08F2/38 ,  C08F2/42 ,  C08F20/00

Abstract: Free radical polymerizations immediately terminated by a process comprising the addition of an inhibitor solution which contains phenothiazine and at least 50% (w/w) N-alkylpyrrolidone to a system undergoing free radical polymerization, wherein the inhibitor solution also contains p-methoxyphenol (MEHQ).

公开(公告)号：DE10228859A1

公开(公告)日：2004-01-15

申请号：DE10228859

申请日：2002-06-27

Applicant: BASF AG

Inventor： DIEHL VOLKER ,  MARKOPOULOS DIMITRIOS ,  SCHROEDER JUERGEN ,  BLECHSCHMITT MICHAEL

IPC: F04D7/02 ,  F04D5/00 ,  F04D29/12 ,  F04D29/60

Abstract: A method of delivering a fluid containing at least one (meth)acrylic monomer by a pump in which a pump cavity and drive compartment are separated by a separator compartment filled with a baffler medium at elevated pressure and that is sealed with double-acting slide ring packings.

公开(公告)号：CA2488226A1

公开(公告)日：2003-12-18

申请号：CA2488226

申请日：2003-06-06

Applicant: BASF AG

Inventor： JAWOREK THOMAS ,  SCHROEDER JUERGEN ,  SCHWALM REINHOLD ,  FUNK RUEDIGER ,  RIEGEL ULRICH ,  WEISMANTEL MATTHIAS ,  POPP ANDREAS ,  DANIEL THOMAS

IPC: C08G65/332 ,  A61L15/60 ,  C07B61/00 ,  C07C67/08 ,  C07C69/54 ,  C08F290/06 ,  C08G65/26 ,  C08G65/28

Abstract: The invention relates to the novel (meth)acrylic esters of polyalkoxylated trimethylolpropane of formula (I) wherein AO independently represents EO, PO or BO, whereby EO represents O-CH2-CH2-, PO independently represents O-CH2- CH(CH3)- or O-CH(CH3)-CH2-, BO independently represents O-CH2-CH(CH2-CH3)- o r O-CH(CH2-CH3)-CH2-, p1 + p2 + p3 equals 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74 o r 75, and R1, R2, R3 independently represent H or CH3. The invention also relates to a simplified method for producing said esters and to the use of t he reaction mixtures thereby obtained.

公开(公告)号：DE10301902A1

公开(公告)日：2003-12-04

申请号：DE10301902

申请日：2003-01-17

Applicant: BASF AG

Inventor： SCHROEDER JUERGEN

IPC: C07C67/03 ,  C07C67/08 ,  C07C67/62 ,  C07C69/54

Abstract: Production of (meth)acrylate esters by esterifying (meth)acrylic acid or transesterifying a (meth)acrylate ester with an alcohol comprises (a) supplying the (meth)acrylic acid or (meth)acrylate ester at a rate of less than 250 g/hour per liter of reactor volume and/or (b) using a polymerization inhibitor in an amount of at least 0.2 mmole per kg alcohol per meq/kg peroxide number of the alcohol and/or (c) heat-treating the alcohol in the absence of water before (trans)esterification.

公开(公告)号：DE10217121A1

公开(公告)日：2003-10-30

申请号：DE10217121

申请日：2002-04-17

Applicant: BASF AG

Inventor： HAMMON ULRICH ,  SCHROEDER JUERGEN

IPC: C07C51/50 ,  C07C67/62 ,  C07C57/07 ,  C07C57/075

Abstract: In fractional condensation of a hot gas mixture containing acrylic acid and other condensable component(s) in a column in the presence of stabilizer(s) (I), the novelty is that (I) is added at least partly as melt (IA). Independent claims are also included for: (1) a melt (II) consisting of: (a) phenolic compound(s); (b) phenothiazine; and (c) optionally other stabilizer(s); and (2) method of separating a substance mixture containing polymerizable compound(s) by rectification in the presence of a stabilizer composition containing phenolic stabilizer(s), which is dosed into the rectification unit as melt.

公开(公告)号：DE10211290A1

公开(公告)日：2003-09-25

申请号：DE10211290

申请日：2002-03-14

Applicant: BASF AG

Inventor： HAMMON ULRICH ,  SCHROEDER JUERGEN ,  RISSEL STEFFEN

IPC: C07C51/44 ,  C07C51/48 ,  C07C57/04 ,  C07C67/54 ,  C07C253/34 ,  G01L7/00 ,  C07C255/08 ,  G01L19/00 ,  C07C57/07 ,  B01D3/14 ,  B01D3/40

Abstract: A process measures the pressure of a gas phase containing (meth)acrylic acid, the esters and/or nitrites thereof of a rectification and/or absorption column via open drillholes in the column wall and lines from the drillholes to the transducers by purging the lines with an oxygen-containing gas in the direction toward the open drillhole.

公开(公告)号：DE10235847A1

公开(公告)日：2003-08-28

申请号：DE10235847

申请日：2002-08-05

Applicant: BASF AG

Inventor： NESTLER GERHARD ,  SCHROEDER JUERGEN

IPC: C07C51/44 ,  C07C57/07

Abstract: A process to recover acrylic acid involves removal of high-boilers via a side exit in the column to prevent process-stopping polymer formation.

公开(公告)号：DE10163543A1

公开(公告)日：2003-07-31

申请号：DE10163543

申请日：2001-12-21

Applicant: BASF AG

Inventor： NESTLER GERHARD ,  SCHROEDER JUERGEN ,  WICKEL STEFAN

IPC: C07C57/075 ,  A61L15/60 ,  C07C69/54 ,  C08F2/44 ,  C08F20/06 ,  C08L33/02 ,  B01J20/22 ,  B01J13/00

Abstract: The present invention relates to novel tocopherol-containing superabsorbents, to a process for preparing them using tocopherol-containing acid-functional monomers, especially acrylic acid, and to their use for absorbing aqueous fluids.

公开(公告)号：DE10217326A1

公开(公告)日：2003-07-17

申请号：DE10217326

申请日：2002-04-18

Applicant: BASF AG

Inventor： HAMMON ULRICH ,  SCHROEDER JUERGEN

IPC: B08B7/00 ,  C07C51/25 ,  C07C57/05 ,  B01J19/00 ,  B08B5/00 ,  B08B9/00

Abstract: Cooling apparatus used between stages 1 and 2 in the catalytic gas phase oxidation of propene or isobutene to (meth)acrylic acid is cleaned by hot purging with oxygen-containing gas while increasing the oxygen content from 3-5 to 21 vol.% in such a way that the off-gas temperature is always at least 20 degrees C below the temperature limit for the material in the apparatus. A method for cleaning a cooling system with heat transfer surfaces as used in the production of (meth)acrylic acid by 2-stage catalytic gas-phase oxidation of propene or isobutene, i.e. for cooling the gas mixture from reaction zone 1 (production of (meth)acrolein) before it enters zone 2 (production of (meth)acrylic acid). This involves passing gas with a controllable oxygen content through the cooler with the heat transfer surfaces at a temperature of at least 380 degrees C, using an oxygen content which is increased from 3-5 vol.% to 21 vol.% during the cleaning process and regulated in such a way that the temperature of the off-gas from the cooler is always at least 20 degrees C below the maximum temperature allowed by the thermal stability of the material in the cooler.