公开(公告)号：CZ20011982A3

公开(公告)日：2002-01-16

申请号：CZ20011982

申请日：1999-12-07

Applicant: BASF AG

Inventor： SUTORIS HEINZ FRIEDRICH ,  WAGENBLAST GERHARD ,  SCHLIEPHAKE VOLKER ,  SCHRODER JURGEN ,  MULLER-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：DE59704610D1

公开(公告)日：2001-10-18

申请号：DE59704610

申请日：1997-06-19

Applicant: BASF AG

Inventor： SCHLIEPHAKE VOLKER ,  HAMMON ULRICH ,  PIES WOLFGANG ,  RAUH ULRICH

IPC: F23G7/06 ,  C07C51/42 ,  C07C57/04 ,  C07C57/07 ,  F23D17/00 ,  F23G5/00 ,  F23G7/04

Abstract: In a process for the disposal of low, mediun, and high-boiling secondary components formed during the preparation of (meth)acrylic acid the gaseous low-boiling secondary components are burned, whilst low-boiling and medium-boiling secondary components that are dissolved in water optionally together with high-boiling secondary components treated with solvent are added.

公开(公告)号：DE19946136A1

公开(公告)日：2001-03-29

申请号：DE19946136

申请日：1999-09-27

Applicant: BASF AG

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

IPC: C09K15/14 ,  C07B63/04 ,  C07C51/50 ,  C07C57/075 ,  C09K15/24 ,  C09K15/30 ,  C09K15/08 ,  C07D295/24 ,  C07C39/06 ,  C07C57/07

Abstract: Phosphorus-free inhibitor compositions containing (a) N-oxyl radical(s) and (b) a phenol, optionally substituted with up to three 1-4C alkyl, 2-4C alkenyl or 7-10C aralkyl groups. Phosphorus-free inhibitor compositions (I) containing (a) N-oxyl radical(s) and (b) a compound of formula (X). n = 0-3; R = 1-4C alkyl, 2-4C alkenyl or 7-10C aralkyl. Independent claims are also included for: (i) a method for stabilizing materials containing ethylenic double bond(s) against unwanted polymerisation by adding (I) to the material; (ii) a mixture containing an ethylenically unsaturated compound and an effective amount of (I) as polymerisation inhibitor.

公开(公告)号：CA2314875A1

公开(公告)日：2001-02-17

申请号：CA2314875

申请日：2000-08-03

Applicant: BASF AG

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

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

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：DE19926082A1

公开(公告)日：2000-12-14

申请号：DE19926082

申请日：1999-06-08

Applicant: BASF AG

Inventor： ECK BERND ,  HEILEK JOERG ,  BAUMANN DIETER ,  SCHLIEPHAKE VOLKER

IPC: C07C51/64 ,  C07C51/25 ,  C07C51/43 ,  C07C51/47 ,  C07C57/05 ,  C07C57/07

Abstract: The invention relates to a method of purifying and producing acrylic acid or methacrylic acid by crystallization. As a result of the crystallization, a crystallized product and a mother liquor is obtained and the crystallized product is washed at a temperature of 15 to 40 DEG C with a wash solution that contains the acid. The invention further relates to a method of producing acrylic acid or methacrylic acid that comprises the above-mentioned purification method.

公开(公告)号：AU2431000A

公开(公告)日：2000-06-26

申请号：AU2431000

申请日：1999-12-07

Applicant: BASF AG

Inventor： SUTORIS HEINZ FRIEDRICH ,  WAGENBLAST GERHARD ,  SCHLIEPHAKE VOLKER ,  SCHRODER JURGEN ,  MULLER-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：DE19856565A1

公开(公告)日：2000-06-15

申请号：DE19856565

申请日：1998-12-08

Applicant: BASF AG

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

IPC: C07C45/86 ,  C07B63/04 ,  C07C47/22 ,  C07C51/50 ,  C07C51/64 ,  C07C57/075 ,  C07C67/62 ,  C07C69/54 ,  C01B25/163 ,  C07C291/04 ,  C07D211/94 ,  C07F9/141

Abstract: A method for stabilizing chemical compounds containing at least one ethylenically unsaturated bond in order to prevent undesirable radical polymerization, whereby a nitroxyl radical and a chemical compound containing chemically bonded phosphorus are added to an unsaturated compound existing in the form of a pure substance or constituent in a mixture.

公开(公告)号：CZ20000898A3

公开(公告)日：2000-06-14

申请号：CZ20000898

申请日：1998-09-10

Applicant: BASF AG

Inventor： ECK BERND ,  MACHHAMMER OTTO ,  PROLL THEO ,  SCHLIEPHAKE VOLKER ,  THIEL JOACHIM ,  BROELLOS KLAUS

IPC: B01D5/00 ,  C07C51/44 ,  C07C57/07

CPC classification number: B01D5/003 ,  C07C51/44 ,  C07C57/04

公开(公告)号：DE19832962A1

公开(公告)日：2000-01-27

申请号：DE19832962

申请日：1998-07-22

Applicant: BASF AG

Inventor： ECK BERND ,  HEILEK JOERG ,  SCHLIEPHAKE VOLKER

IPC: C07C51/43 ,  C07C57/07

公开(公告)号：BR9710251A

公开(公告)日：1999-08-10

申请号：BR9710251

申请日：1997-07-09

Applicant: BASF AG

Inventor： ECK BERND ,  MACHHAMMER OTTO ,  PROLL THEO ,  SCHLIEPHAKE VOLKER ,  MULLER-ENGEL KLAUS JOACHIM

IPC: C07C57/04 ,  C07C51/21 ,  C07C51/43 ,  C07C57/05 ,  C07C57/07

Abstract: A process for preparing acrylic acid or methacrylic acid comprises(a) preparing a gaseous product mixture having essentially the composition of a reaction mixture of the catalytic gas phase oxidation of C3-/C4-alkanes, -alkenes, -alkanols and/or -alkanals and/or precursors thereof to form acrylic acid or methacrylic acid, characterized by(b) condensing said product mixture,(c) crystallizing acrylic acid or methacrylic acid from the solution obtained in step (b), and(d) removing the resulting crystals from the mother liquor.