公开(公告)号：JP2000086565A

公开(公告)日：2000-03-28

申请号：JP23613599

申请日：1999-08-23

Applicant: BASF AG

Inventor： AQUILA WERNER DR ,  BOTZEM JOERG DR ,  BRUNNER MELANIE DR ,  FUCHS HARTWIG ,  KRAUSE WOLFGANG DR ,  PANDL KLAUS ,  SCHAEFER-LUEDERSSEN ULRICH DR

IPC: B01J23/50 ,  C07B61/00 ,  C07C45/37 ,  C07C45/39 ,  C07C45/51 ,  C07C49/175 ,  C07C49/403

Abstract: PROBLEM TO BE SOLVED: To produce a carbonyl compound in a high yield and high space time yield even on an industrial scale by oxidizing an alcohol with oxygen in the presence of a silver-coated catalyst, or silver crystal or copper one each having a specific particle diameter under conditions of specific residence time and a specific temperature. SOLUTION: When performing vapor phase oxidation of an alcohol of formula I [R1 and R2 are each an aliphatic group, an alicyclic one, an aromatic- aliphatic one, an alicyclic-aliphatic one respectively having 1-10 carbon atoms or a 3-10C (lower alkyl-substituted) alkylene; X is O or two of an alkoxy group of the formula OR3 (R3 is a 1-6C aliphatic group or the like)] [pref. a ketol (X=0) such as 3-hydroxy-2-butanone (i.e., acetoin) or the like] with oxygen (A) at 270-600 deg.C in the presence of a silver-coated catalyst comprising silver- metal wear resistant coating on the core of an inert support material, or (B) at 450-750 deg.C for

公开(公告)号：DE19838046A1

公开(公告)日：2000-02-24

申请号：DE19838046

申请日：1998-08-21

Applicant: BASF AG

Inventor： AQUILA WERNER ,  BOTZEM JOERG ,  BRUNNER MELANIE ,  FUCHS HARTWIG ,  KRAUSE WOLFGANG ,  PANDL KLAUS ,  SCHAEFER-LUEDERSSEN ULRICH

IPC: B01J23/50 ,  C07B61/00 ,  C07C45/37 ,  C07C45/39 ,  C07C45/51 ,  C07C49/175 ,  C07C49/403 ,  C07C49/12

公开(公告)号：DE19849380A1

公开(公告)日：2000-05-04

申请号：DE19849380

申请日：1998-10-27

Applicant: BASF AG

Inventor： DANZ ECKEHARD ,  PANDL KLAUS

IPC: C07C29/17 ,  C07C29/42 ,  C07C31/20 ,  C07C33/046 ,  C07C45/78 ,  C07C45/86 ,  C07C47/04 ,  C07C47/058 ,  C07C29/36

Abstract: Aqueous formaldehyde solutions with a pH value of 3.4-4.2, containing a) 10-75 wt.% formaldehyde and b) 0-5000 wt.ppm tetroxane.

公开(公告)号：DE59905949D1

公开(公告)日：2003-07-17

申请号：DE59905949

申请日：1999-10-14

Applicant: BASF AG

Inventor： DANZ ECKEHARD ,  PANDL KLAUS

IPC: C07C29/17 ,  C07C29/42 ,  C07C31/20 ,  C07C33/046 ,  C07C45/78 ,  C07C45/86 ,  C07C47/04 ,  C07C47/058

Abstract: The claimed invention relates to a process for preparing an aqueous formaldehyde solution comprising absorbing a formaldehyde-loaded gas stream, in an absorption zone, in an aqueous solution comprising from 0.000% to 0.01% by weight of a Bronsted base, based on the formaldehyde absorbed. The produced aqueous formaldehyde solution comprises: a) from 10 to 75% by weight of formaldehyde, b) from 0 to 500 ppm by weight of tetroxane, c) from 50 to 400 ppm by weight of formic acid, based on the formaldehyde absorbed, and d) from 0.2 to 5.0% by weight of methanol, based on the formaldehyde absorbed.