公开(公告)号：CA2293577A1

公开(公告)日：1998-12-23

申请号：CA2293577

申请日：1998-06-04

Applicant: BASF AG

Inventor： DUPUIS JACQUES ,  MITULLA KONRAD ,  KALIBA CLAUS ,  SUTORIS HEINZ FRIEDRICH

IPC: C07B63/04 ,  C07C7/20 ,  C07C15/46 ,  C09K15/20 ,  C09K15/30 ,  C09K15/32

Abstract: The invention relates to a mixture of substances containing one or several compounds with vinyl groups as constituent (A) and a stabilizer (B) as another constituent containing one or several easily volatile nitroxyl compounds as constituent (b1), one or several non-easily volatile nitroxyl compounds as constituent (b2), optionally one or several aromatic nitro compounds as constituent (b3) and optionally one or several iron compounds as constituent (b4). The invention also relates to stabilizers (B) containing constituents (b1) and (b2), (b1) and (b2) and (b3), (b1) and (b2) and (b4), in addition to (b1), (b2), (b3) and (b4). The invention further relates to a method for inhibiting premature polymerization of compounds with vinyl groups during the cleaning thereof or distillation by adding a stabilizer (B), or by adding the constituents of stabilizer (B) as individual substances or in at least two groups of constituents.

公开(公告)号：CA2314875C

公开(公告)日：2007-06-19

申请号：CA2314875

申请日：2000-08-03

Applicant: BASF AG

Inventor： JAWOREK THOMAS ,  SUTORIS HEINZ FRIEDRICH ,  WAGENBLAST GERHARD ,  SCHRODER JURGEN ,  SCHLIEPHAKE VOLKER ,  KELLER HARALD

IPC: C09K15/08 ,  C09K15/32 ,  C07B63/04 ,  C07C7/20 ,  C07C51/50 ,  C07C67/62 ,  C09K15/02 ,  C09K15/04 ,  C09K15/20 ,  C09K15/24 ,  C09K15/30

Abstract: An inhibitor mixture containing, as components, a) at least one nitroxyl radical (derivative), b) at least one phenol (derivative) and c) at least one chemic al compound which contains at least one phosphorus atom which has the oxidation state +3 is preferably used for stabilizing compounds capable of free radical polymerization.

公开(公告)号：ES2216902T3

公开(公告)日：2004-11-01

申请号：ES00938781

申请日：2000-06-09

Applicant: BASF AG

Inventor： SUTORIS HEINZ FRIEDRICH ,  MITULLA KONRAD

IPC: B01J19/00 ,  C07B63/04 ,  C07C7/05 ,  C07C7/20 ,  C07C15/46 ,  C08F2/38 ,  C08F2/40 ,  C08F12/00

Abstract: A process for preventing undesired polymerization is conducted by maintaining an effective concentration of a stabilizer which comprises N-oxyl radicals in a mixture containing ethylenically unsaturated compounds, wherein(i) an electronic signal which correlates with the concentration of the N-oxyl radicals in the mixture is obtained periodically or continuously,(ii) the electronic signal is compared with a reference value, and(iii) addition of a stabilizer to the mixture is controlled according to the comparison (ii).The signal is preferably obtained by ESR measurement. The process permits efficient use of the stabilizer.

公开(公告)号：DE10223618A1

公开(公告)日：2003-12-11

申请号：DE10223618

申请日：2002-05-27

Applicant: BASF AG

Inventor： HOEFER FRANK ,  HAREMZA SYLKE ,  WAGENBLAST GERHARD ,  SCHLIEPHAKE VOLKER ,  JAEGER ULRICH ,  SCHROEDER JUERGEN ,  KELLER HARALD ,  SUTORIS HEINZ FRIEDRICH

IPC: C07C51/50 ,  C07C67/62 ,  C07C57/075 ,  C07C231/22 ,  C09K15/00 ,  C09K15/02 ,  C09K15/08 ,  C09K15/30

Abstract: A process for the stabilization of (meth)acrylic acids, (meth)acrylic acid esters and (meth)acrylamide against polymerization comprises use of a stabilizer mixture comprising at least one cerium salt, a further stabilizer compound and an oxygen containing gas. A process for the stabilization of (meth)acrylic acids, (meth)acrylic acid esters and (meth)acrylamide against polymerization comprises use of a stabilizer mixture (I) comprising: (A) at least one cerium salt; (B) a further stabilizer compound; (C) an oxygen containing gas such that cerium acetate and phenothiazine and at least one phenolic compound in the presence of an oxygen containing gas are not simultaneously added to a process for the production of acrylic acid. An Independent claim is included for the stabilizer mixture (I), optionally containing a solvent.

公开(公告)号：AT249407T

公开(公告)日：2003-09-15

申请号：AT00916873

申请日：2000-02-25

Applicant: BASF AG

Inventor： MITULLA KONRAD ,  SUTORIS HEINZ FRIEDRICH

IPC: B01D3/32 ,  C07B63/04 ,  C07C7/05 ,  C07C7/20 ,  C07C15/46

Abstract: The invention relates to a method for the continuous recovery of styrene from a mixture containing same, by distillation of the mixture in a cascade of n distillation columns. According to said method, (i) an inflow containing a stabilizer system is fed into the first column and/or is placed into at least one of the distillation columns positioned upstream of the nth distillation column, whereby said stabilizer system comprises N-oxyl radicals; (ii) in the bottom of the nth distillation column a high-boiling fraction containing the stabilizer system and boiling at a higher temperature than styrene is concentrated; (iii) a partial flow of the high-boiling fraction is recycled and placed into at least one distillation column positioned upstream of the nth distillation column; and (iv) the remainder of the high-boiling fraction is withdrawn from the process.

公开(公告)号：AU2002346923A1

公开(公告)日：2003-05-06

申请号：AU2002346923

申请日：2002-10-16

Applicant: BASF AG

Inventor： WAGENBLAST GERHARD ,  HOFER FRANK ,  SCHRODER JURGEN ,  SCHLIEPHAKE VOLKER ,  HAREMZA SYLKE ,  KELLER HARALD ,  SUTORIS HEINZ FRIEDRICH ,  JAGER ULRICH

IPC: C07C51/50 ,  C07C67/62 ,  C07C57/04 ,  C07C57/075 ,  C07C69/54

公开(公告)号：AU8969801A

公开(公告)日：2002-02-05

申请号：AU8969801

申请日：2001-07-19

Applicant: BASF AG

Inventor： JENTZSCH AXEL ,  SUTORIS HEINZ FRIEDRICH ,  WAGENBLAST GERHARD ,  HAREMZA SYLKE

IPC: A61K8/00 ,  A61K8/04 ,  A61K8/14 ,  A61K8/23 ,  A61K8/30 ,  A61K8/44 ,  A61K8/46 ,  A61K8/49 ,  A61K8/55 ,  A61K8/58 ,  A61Q1/00 ,  A61Q1/02 ,  A61Q3/00 ,  A61Q5/00 ,  A61Q5/06 ,  A61Q5/12 ,  A61Q15/00 ,  A61Q17/00 ,  A61Q17/04 ,  A61Q19/00 ,  A61Q19/08 ,  A61Q19/10 ,  A61K7/48

Abstract: Cosmetic or dermatological preparations for avoiding or reducing skin damage by peroxides or hydroperoxides formed as a result of endogenous or exogenous factors, with a content of a) at least one antioxidant effective as O- or C-free radical scavenger and b) at least one organic or inorganic skin-compatible compound which reduces peroxides or hydroperoxides to the corresponding alcohols without the formation of active free-radical subsequent stages, where this compound is chosen such that, at body temperature, it reacts significantly more rapidly than sulfur-containing compounds intrinsic to the skin.

公开(公告)号：BR9916088A

公开(公告)日：2001-09-04

申请号：BR9916088

申请日：1999-12-07

Applicant: BASF AG

Inventor： SUTORIS HEINZ FRIEDRICH ,  WAGENBLAST GERHARD ,  SCHLIEPHAKE VOLKER ,  SCHROEDER JUERGEN ,  MUELLER-ENGEL KLAUS JOACHIM ,  KELLER HARALD ,  JAWOREK THOMAS

IPC: C07C45/86 ,  C07B63/04 ,  C07C47/22 ,  C07C51/50 ,  C07C51/64 ,  C07C57/075 ,  C07C67/62 ,  C07C69/54 ,  C07C51/00

公开(公告)号：AU4237501A

公开(公告)日：2001-08-27

申请号：AU4237501

申请日：2001-02-08

Applicant: BASELL POLYOLEFINE GMBH ,  BASF AG

Inventor： MAHLING FRANK-OLAF ,  DECKERS ANDREAS ,  LITTMANN DIETER ,  SUTORIS HEINZ FRIEDRICH ,  EVERTZ KASPAR

IPC: C08F2/01 ,  C08F2/38 ,  C08F2/40 ,  C08F10/00 ,  C08F110/02 ,  C08F297/08 ,  C08F210/02 ,  C08F10/02 ,  B01D3/00

Abstract: In a process for the polymerization or copolymerization of ethylenically unsaturated monomers in the presence of polymerization initiators which decompose to form free radicals in a continuously operated polymerization apparatus comprising a fresh gas feed line, a precompressor, a postcompressor, a reactor, a pressure maintenance valve, a high-pressure circuit having a high-pressure product separator and a high-pressure circulation gas return line, a product valve and a low-pressure circuit having a low-pressure product separator and a low-pressure circulation gas return line, nitrogen monoxide or oxygen is introduced as inhibitor into the high-pressure circuit, into the low-pressure circuit and/or the precompressor.

公开(公告)号：DE19926758A1

公开(公告)日：2000-12-14

申请号：DE19926758

申请日：1999-06-11

Applicant: BASF AG

Inventor： SUTORIS HEINZ FRIEDRICH ,  MITULLA KONRAD

IPC: B01J19/00 ,  C07B63/04 ,  C07C7/05 ,  C07C7/20 ,  C07C15/46 ,  C08F2/38 ,  C08F2/40 ,  C08F12/00 ,  C09K15/20 ,  C09K15/30 ,  B01D3/42 ,  B01D3/34

Abstract: The invention relates to a method for preventing undesired polymerisation in a mixture of substances containing ethylenically unsaturated compounds, by maintaining an active concentration of a stabiliser system which contains N-oxyl radicals. According to said method, (i) an electronic signal is obtained periodically or continuously which is in correlation with the concentration of the N-oxyl radicals (ii) the electronic signal is compared with a default value and (iii) the addition of the stabiliser system is controlled, in accordance with this comparison. The signal is preferably obtained by an ESR measurement. The method permits the effective use of the stabiliser system.