公开(公告)号：DE3306907A1

公开(公告)日：1984-08-30

申请号：DE3306907

申请日：1983-02-26

Applicant: BASF AG

Inventor： BAER KARL DR ,  BASSLER PETER DR ,  DUEMBGEN GERD DR ,  FOUQUET GERD DR ,  KRABETZ RICHARD DR ,  MERGER FRANZ DR ,  NEES FRIEDBERT DR

IPC: C07C69/54 ,  B01J23/00 ,  B01J23/06 ,  B01J23/62 ,  C07B61/00 ,  C07C67/39

Abstract: Catalysts for the preparation of carboxylates from an aldehyde and an alkanol in the presence of oxygen, which contain palladium and lead as active components, these being present on a carrier containing zinc oxide, and the palladium being applied as a palladium salt in a solution containing hydrochloric acid and then being liberated by reduction, and whose carrier consists solely of zinc oxide, are particularly active and selective.

公开(公告)号：DE3161337D1

公开(公告)日：1983-12-15

申请号：DE3161337

申请日：1981-01-24

Applicant: BASF AG

Inventor： MERGER FRANZ DR ,  FOUQUET GERD DR

IPC: B01J27/00 ,  C07B61/00 ,  C07C67/343 ,  C07C69/54

Abstract: Methyl methacrylate is prepared by reacting methyl propionate and methanol at 200 DEG -550 DEG C. over a catalyst mixture which has a condensing action and is capable of dehydrogenating methanol to formaldehyde.

公开(公告)号：DE2706076A1

公开(公告)日：1978-08-24

申请号：DE2706076

申请日：1977-02-12

Applicant: BASF AG

Inventor： FOUQUET GERD DR ,  MERGER FRANZ DR ,  PLATZ ROLF DR ,  BAER KARL DR

IPC: C07C51/353 ,  C07C69/54 ,  B01J31/04 ,  C07C51/00 ,  C07C57/04 ,  C07C67/24

Abstract: Methacrylic acid and methyl methacrylate CH2 = C(CH3)-COOR' (where R1 is H or Me) are made by reacting propionic acid or methyl propionate CH3-CH2-COOR' with formaldehyde dimethylacetal CH3-O-CH2-O-CH3 (I) for 0.1-100 seconds. Reactions is in the presence of (i) 0-0.5 moles water per mol (I) and (ii) a catalyst comprising phosphates and/or silicates of Mg, Ca, Al, Zr, Th or Ti, opt. with the addn. of oxides of Zr, Al, Th and/or Ti and/or boric acid and/or urea. Catalyst is opt. modified by alkali(ne earth) carboxylates or cpds. forming these under the prevailing conditions, pref. with alkali propionate, KOH or LiOH. Process proceeds with high space-time yield and high selectivity to the prodn. of the desired prod. No additional diluent is required and the post treatment for recovery of the prod. is simple and economical in expenditure of energy. The unconverted (I) is easily recycled to the reaction.