公开(公告)号：GB2289282A

公开(公告)日：1995-11-15

申请号：GB9508655

申请日：1995-04-28

Applicant: BASF AG

Inventor： TREMMEL GREGOR ,  VAES GUIDO ,  ENGLERT KURT ,  UHR HERMANN

IPC: C07C7/05 ,  C07C7/20 ,  C07C15/46

Abstract: In the distillation of styrene in at least one distillation column in the presence of a nitrophenol capable of inhibiting polymerization, the nitrophenol which is added to the feed flowing to the column and which accumulates in the residues at the bottom of the column is recovered by reaction of the residues with ammonia to form the ammonium nitrophenolate, and the nitrophenol is recycled to the column feed in the form of the ammonium nitrophenolate. The contents of the base of the column may be treated with gaseous ammonia and the precipitated ammonium nitrophenolate separated and added, in solid form, to the feed flowing to the column.

公开(公告)号：DE4237740A1

公开(公告)日：1994-05-11

申请号：DE4237740

申请日：1992-11-09

Applicant: BASF AG

Inventor： POEPEL WOLFGANG JUERGEN DR ,  TREMMEL GREGOR ,  BUECHELE WOLFGANG DR ,  DEIMLING AXEL DR ,  PETERSEN HERMANN DR

IPC: B01J23/78 ,  B01J23/85 ,  B01J23/92 ,  B01J23/94 ,  B01J37/00 ,  B01J38/00 ,  B01J38/68 ,  C07C5/32 ,  C07C5/333

Abstract: Proposed is a method of producing catalysts containing iron, potassium and cerium from spent catalysts of this type used in the dehydrogenation of hydrocarbons (i.e. a regeneration method). The method calls for the spent catalyst to be ground and optionally cleaned, and the original catalytic action to be produced again by adjustment of the composition and restoring the external form, an effective quantity of potassium being added to the ground material together with a quantity of cerium such that the total amount of cerium is greater than that originally present.

公开(公告)号：DE3009632A1

公开(公告)日：1981-09-24

申请号：DE3009632

申请日：1980-03-13

Applicant: BASF AG

Inventor： HEIMLICH GUENTHER DIPL CHEM DR ,  TREMMEL GREGOR ,  LIEB MANFRED DIPL ING ,  LAUSBERG DIETRICH DIPL CHEM DR

IPC: C07C2/66 ,  C07C2/68 ,  C07C7/00 ,  C07C7/148 ,  C07C15/073

公开(公告)号：BG101836A

公开(公告)日：1998-09-30

申请号：BG10183697

申请日：1997-08-15

Applicant: BASF AG

Inventor： KOCH ANDREAS ,  AUMULLER ALEXANDER ,  MITULLA KONRAD ,  TREMMEL GREGOR ,  HERBST HOLGER

IPC: C07D211/58 ,  C07B63/04 ,  C07D211/94 ,  C07F9/59 ,  C09K15/22 ,  C09K15/30

Abstract: The 4-acylaminopiperidine-N-oxyls assist in the stabilizationof the organic substances against the injurious effects of freeradicals, in particular in the distillation ofradical-polymerization monomers such as styrene. They have theformulaA1B1where A1 means hydrogen or organic radical, and B1 means radicalwith the formulawhere R1, R2, R3 & R4 mean C1-C4 alkyl, and both R1 & R2, as wellas R3 & R4 can be bound in a 5- or 6-atom ring, R5 meaning H orC1-C4 alkyl, and R6 being hydrogen or C1-C18 alkyl.15 claims

公开(公告)号：BR9607652A

公开(公告)日：1998-06-16

申请号：BR9607652

申请日：1996-03-15

Applicant: BASF AG

Inventor： KOCH ANDREAS ,  TREMMEL GREGOR ,  MITULLA KONRAD ,  AUMULLER ALEXANDER ,  HERBST HOLGER

IPC: C07D211/58 ,  C07B63/04 ,  C07D211/94 ,  C07F9/59 ,  C09K15/22 ,  C09K15/30

Abstract: PCT No. PCT/EP96/01122 Sec. 371 Date Sep. 22, 1997 Sec. 102(e) Date Sep. 22, 1997 PCT Filed Mar. 15, 1996 PCT Pub. No. WO96/29311 PCT Pub. Date Sep. 26, 19964-Acylaminopiperidine N-oxides IaA1B1(Ia)where A1 is hydrogen or an organic radical and B1 is a radical IIa where R1-R4 are each C1-C4-alkyl and R1 and R2, on the one hand, and R3 and R4, on the other hand, may furthermore be bonded to form a 5-membered or 6-membered ring, R5 is H or C114 C4-alkyl and R6 is H or C1-C18-alkyl, are used for stabilizing organic materials against the harmful effect of free radicals, particularly in the distillation of monomers which undergo free radical polymerization, especially styrene.

公开(公告)号：SK108497A3

公开(公告)日：1998-03-04

申请号：SK108497

申请日：1996-03-15

Applicant: BASF AG

Inventor： KOCH ANDREAS ,  AUMULLER ALEXANDER ,  MITULLA KONRAD ,  TREMMEL GREGOR ,  HERBST HOLGER

IPC: C07D211/58 ,  C07B63/04 ,  C07D211/94 ,  C07F9/59 ,  C09K15/22 ,  C09K15/30

Abstract: PCT No. PCT/EP96/01122 Sec. 371 Date Sep. 22, 1997 Sec. 102(e) Date Sep. 22, 1997 PCT Filed Mar. 15, 1996 PCT Pub. No. WO96/29311 PCT Pub. Date Sep. 26, 19964-Acylaminopiperidine N-oxides IaA1B1(Ia)where A1 is hydrogen or an organic radical and B1 is a radical IIa where R1-R4 are each C1-C4-alkyl and R1 and R2, on the one hand, and R3 and R4, on the other hand, may furthermore be bonded to form a 5-membered or 6-membered ring, R5 is H or C114 C4-alkyl and R6 is H or C1-C18-alkyl, are used for stabilizing organic materials against the harmful effect of free radicals, particularly in the distillation of monomers which undergo free radical polymerization, especially styrene.

公开(公告)号：CZ9702743A3

公开(公告)日：1998-01-14

申请号：CZ274397

申请日：1996-03-15

Applicant: BASF AG

Inventor： KOCH ANDREAS DR ,  AUMULLER ALEXANDER DR ,  MITULLA KONRAD DR ,  TREMMEL GREGOR ,  HERBST HOLGER DR

IPC: C07D211/58 ,  C07B63/04 ,  C07D211/94 ,  C07F9/59 ,  C09K15/22 ,  C09K15/30

CPC classification number: C09K15/30 ,  C07B63/04 ,  C07D211/94 ,  C07F9/598

公开(公告)号：CZ274397A3

公开(公告)日：1998-01-14

申请号：CZ274397

申请日：1996-03-15

Applicant: BASF AG

Inventor： KOCH ANDREAS DR ,  AUMULLER ALEXANDER DR ,  MITULLA KONRAD DR ,  TREMMEL GREGOR ,  HERBST HOLGER DR

IPC: C07D211/58 ,  C07B63/04 ,  C07D211/94 ,  C07F9/59 ,  C09K15/22 ,  C09K15/30

Abstract: PCT No. PCT/EP96/01122 Sec. 371 Date Sep. 22, 1997 Sec. 102(e) Date Sep. 22, 1997 PCT Filed Mar. 15, 1996 PCT Pub. No. WO96/29311 PCT Pub. Date Sep. 26, 19964-Acylaminopiperidine N-oxides IaA1B1(Ia)where A1 is hydrogen or an organic radical and B1 is a radical IIa where R1-R4 are each C1-C4-alkyl and R1 and R2, on the one hand, and R3 and R4, on the other hand, may furthermore be bonded to form a 5-membered or 6-membered ring, R5 is H or C114 C4-alkyl and R6 is H or C1-C18-alkyl, are used for stabilizing organic materials against the harmful effect of free radicals, particularly in the distillation of monomers which undergo free radical polymerization, especially styrene.

公开(公告)号：NO974336L

公开(公告)日：1997-09-19

申请号：NO974336

申请日：1997-09-19

Applicant: BASF AG

Inventor： KOCH ANDREAS ,  AUMUELLER ALEXANDER ,  MITULLA KONRAD ,  TREMMEL GREGOR ,  HERBST HOLGER

IPC: C07D211/58 ,  C07B63/04 ,  C07D211/94 ,  C07F9/59 ,  C09K15/22 ,  C09K15/30

Abstract: PCT No. PCT/EP96/01122 Sec. 371 Date Sep. 22, 1997 Sec. 102(e) Date Sep. 22, 1997 PCT Filed Mar. 15, 1996 PCT Pub. No. WO96/29311 PCT Pub. Date Sep. 26, 19964-Acylaminopiperidine N-oxides IaA1B1(Ia)where A1 is hydrogen or an organic radical and B1 is a radical IIa where R1-R4 are each C1-C4-alkyl and R1 and R2, on the one hand, and R3 and R4, on the other hand, may furthermore be bonded to form a 5-membered or 6-membered ring, R5 is H or C114 C4-alkyl and R6 is H or C1-C18-alkyl, are used for stabilizing organic materials against the harmful effect of free radicals, particularly in the distillation of monomers which undergo free radical polymerization, especially styrene.

公开(公告)号：NO974336A

公开(公告)日：1997-09-19

申请号：NO974336

申请日：1997-09-19

Applicant: BASF AG

Inventor： KOCH ANDREAS ,  AUMUELLER ALEXANDER ,  MITULLA KONRAD ,  TREMMEL GREGOR ,  HERBST HOLGER

IPC: C07D211/58 ,  C07B63/04 ,  C07D211/94 ,  C07F9/59 ,  C09K15/22 ,  C09K15/30

CPC classification number: C09K15/30 ,  C07B63/04 ,  C07D211/94 ,  C07F9/598