公开(公告)号：DE10063175A1

公开(公告)日：2002-06-20

申请号：DE10063175

申请日：2000-12-18

Applicant: BASF AG

Inventor： MARTIN FRIEDRICH-GEORG ,  NESTLER GERHARD ,  SCHROEDER JUERGEN

IPC: C07C67/08 ,  C07C69/54 ,  C08F120/10

Abstract: The invention relates to a method for producing (meth)acrylic acid esters by transesterification of the (meth)acrylic acid with a higher alkanol in the presence of an acid catalyst, at least one polymerization inhibitor and one organic solvent that forms an azeotropic mixture with water. The reaction mixture is heated to the boiling point of the mixture in a reactor that comprises a distillation unit with a column and a condenser. The content of the reactor is recirculated via an external evaporator and heated to the boiling point, and the azeotropic mixture is distilled off. The organic solvent forms a reflux and at least a part of the solvent reflux is recirculated between the reactor and the evaporator. The inventive method allows for the production of higher (meth)acrylic acid esters in a reactor with a circulation evaporator without using copper salts as the polymerization inhibitors.

公开(公告)号：DE10127941A1

公开(公告)日：2002-05-29

申请号：DE10127941

申请日：2001-06-08

Applicant: BASF AG

Inventor： NESTLER GERHARD ,  RAUH ULRICH ,  SCHROEDER JUERGEN

IPC: C07B61/00 ,  C07C67/54 ,  C07C213/06 ,  C07C213/10 ,  C07C219/08 ,  C07C219/02 ,  C07C27/00 ,  C07B41/12 ,  C07D227/12 ,  C07D295/24

Abstract: Production of a higher (meth)acrylate ester (I) by transesterifying a lower (meth)acrylate ester (II) with a higher alcohol (R OH) in the presence of a stabilizer and a catalyst comprises separating the by-product lower alcohol (R OH) and at least partly recycling it to the production of (II).

公开(公告)号：BR0010033A

公开(公告)日：2002-01-15

申请号：BR0010033

申请日：2000-04-27

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：BR9915223A

公开(公告)日：2001-07-24

申请号：BR9915223

申请日：1999-11-05

Applicant: BASF AG

Inventor： AICHINGER HEINRICH ,  HERBST HOLGER ,  NESTLER GERHARD ,  SCHROEDER JUERGEN

IPC: C07C67/08 ,  C07C67/60 ,  C07C69/54 ,  C07C67/62

Abstract: A method for continuous production of (meth)acrylic alkyl esters by reacting (meth)acrylic acid with alkanols containing 1-8 C-atoms, whereby raw (meth)acrylic acid containing acetic acid is used as a starting compound and the alkyl acetate that is formed as a by-product is evacuated in an appropriate area.

公开(公告)号：DE19915116A1

公开(公告)日：2000-10-19

申请号：DE19915116

申请日：1999-04-01

Applicant: BASF AG

Inventor： KELLER HARALD ,  JAWOREK THOMAS ,  SCHLIEPHAKE VOLKER ,  SCHROEDER JUERGEN ,  SUTORIS HEINZ FRIEDRICH ,  WAGENBLAST GERHARD

IPC: B01J19/02 ,  B05D3/10 ,  B05D7/16 ,  C09D179/02 ,  B65D25/14 ,  B65D90/04 ,  C09D125/04 ,  C09D131/02

Abstract: An object with a protective surface coating containing a crosslinked polyamine. An Independent claim is also included for a method for the production of a protective coating, involving (a) preparation of an object with a sufficiently clean surface, (b) application of polyamine to the surface, (c) treatment with a polyamine-crosslinking medium and (d) partial or complete removal of the crosslinker from the surface.

公开(公告)号：DE10013828A1

公开(公告)日：2000-10-05

申请号：DE10013828

申请日：2000-03-21

Applicant: BASF AG

Inventor： SUTORIS HEINZ-FRIEDRICH ,  WAGENBLAST GERHARD ,  SCHROEDER JUERGEN ,  KELLER HARALD ,  RAHM RAINER ,  DECKER JUERGEN ,  JAWOREK THOMAS ,  SCHIEPHAKE VOLKER

IPC: B01J19/02 ,  C09D179/02 ,  C09D179/08 ,  B01D3/00 ,  B05D7/16 ,  C09D201/02

Abstract: A device in the form of technical process apparatus or a container with a metallic surface containing iron and/or molybdenum and/or vanadium and/or titanium and/or chromium and/or nickel and/or cobalt, has at least part of the surface treated with a polymeric complex-former (I). An Independent claim is also included for a method for the treatment of metallic surfaces by preparing a clean metallic surface and treating this with (I).

公开(公告)号：MXPA00002230A

公开(公告)日：2000-10-01

申请号：MXPA00002230

申请日：2000-03-03

Applicant: BASF AG

Inventor： AICHINGER HEINRICH ,  HERBST HOLGER ,  NESTLER GERHARD ,  SCHROEDER JUERGEN

IPC: B08B3/08 ,  C07C67/03 ,  C07C67/04 ,  C07C67/08 ,  C07C67/48 ,  C07C69/54 ,  C11D7/06 ,  C11D11/00

Abstract: Plant parts which are used for the production or processing of (meth)acrylic esters are cleaned by(a) emptying the plant parts,(b) flushing the plant parts with aqueous 5 to 50% strength by weight alkali metal hydroxide solution,(c) removing the alkali metal hydroxide solution from the plant parts,(d) if required, washing the plant parts with water and(e) if required, drying the plant parts.

公开(公告)号：DE19851984A1

公开(公告)日：2000-05-18

申请号：DE19851984

申请日：1998-11-11

Applicant: BASF AG

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

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

Abstract: A method for esterifying (meth)acrylic acid with an alkanol in the presence of an esterification catalyst, whereby non-reacted starting compounds and the (meth)acrylic acid ester that is to be formed are separated by means of distillation and a bottom product containing an oxyester is created. The bottom product is separated and then the oxyesters contained therein are re-separated in the presence of a longer chained alkylbenzene sulfonic acid at a high temperature.

公开(公告)号：DE19838783A1

公开(公告)日：2000-03-02

申请号：DE19838783

申请日：1998-08-26

Applicant: BASF AG

Inventor： MACHHAMMER OTTO ,  HAUPT SUSANNE ,  SCHLIEPHAKE VOLKER ,  SCHROEDER JUERGEN

IPC: C07C51/44 ,  C07C57/07

Abstract: A process for the continuous recovery of (meth)acrylic acid from a liquid starting mixture containing (meth)acrylic acid, a high-boiling organic solvent and low boilers, medium boilers and high boilers is proposed, the mixture being separated into a first part-stream (a), which, in addition to (meth)acrylic acid, contains the low boilers and a part each of the medium boilers and high boilers, and a second part-stream (b), which contains the predominant part of the (meth)acrylic acid and is completely or virtually completely free of low boilers, and the (meth)acrylic acid being recovered from the part-stream (b).

公开(公告)号：AT383327T

公开(公告)日：2008-01-15

申请号：AT03711978

申请日：2003-03-12

Applicant: BASF AG

Inventor： HAMMON ULRICH ,  SCHROEDER JUERGEN ,  RISSEL STEFFEN

IPC: C07C51/44 ,  G01L7/00 ,  B01D3/00 ,  B01D3/32 ,  C07C51/48 ,  C07C57/04 ,  C07C57/07 ,  C07C67/54 ,  C07C69/54 ,  C07C253/34 ,  C07C255/08 ,  G01L19/00

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.