公开(公告)号：DE19523271A1

公开(公告)日：1997-01-02

申请号：DE19523271

申请日：1995-06-27

Applicant: HOECHST AG

Inventor： ABEL ROLAND DR ,  NICOLAU IOAN DR

IPC: B01J23/60 ,  B01J23/656 ,  C07C67/055 ,  C07C69/15 ,  B01J31/32 ,  B01J31/12 ,  B01J31/04 ,  C07C67/00

Abstract: Vinyl acetate is prepd. in the gas phase from ethylene, acetic acid and O-2 or a gas contg. O2, on a supported catalyst contg. Pd and/or a cpd., Cd, an alkali metal cpd., and a Re cpd. and/or a Zr cpd.

公开(公告)号：DE19613791A1

公开(公告)日：1997-10-09

申请号：DE19613791

申请日：1996-04-04

Applicant: HOECHST AG

Inventor： ABEL ROLAND DR ,  NICOLAU IOAN DR ,  HOPF ERICH ,  KIEMEL RAINER DR

IPC: B01J23/58 ,  B01J23/52 ,  B01J23/66 ,  C07C67/055 ,  C07C69/01 ,  C07C69/15

Abstract: The invention relates to a process for the preparation of vinyl acetate in a gaseous phase from ethylene, acetic acid and oxygen or gases containing oxygen while simultaneously forming low levels of high-boiling agents on a catalyst which contains palladium and/ or the compounds thereof, gold and/or the compounds thereof and alkali metal compounds on a carrier. The process is characterised in that the catalyst also contains boron or boron compounds.

公开(公告)号：BR9202328A

公开(公告)日：1993-01-19

申请号：BR9202328

申请日：1992-06-19

Applicant: HOECHST AG

Inventor： WIRTZ PETER ,  WOERNER KARL-FRED DR ,  WUNDER FRIEDRICH DR ,  EICHLER KLAUS DR ,  ROSCHER GUENTER DR ,  NICOLAU IOAN DR

IPC: B01J23/44 ,  B01J23/06 ,  B01J23/48 ,  B01J23/52 ,  B01J23/58 ,  B01J23/60 ,  B01J23/66 ,  B01J23/89 ,  B01J35/10 ,  B01J37/00 ,  B01J37/02 ,  C07B61/00 ,  C07C67/05 ,  C07C67/055 ,  C07C69/15 ,  C07C69/75

Abstract: Prodn. of catalysts (I) involves (a) washing the ignited support particles with an acid which does not react with silica or alumina, until no more binder cations are washed out, (b) impregnating with Pd and Au or Cd, (c) contacting with a soln. of a base until there is no further change in the thickness of the noble metal layer produced on the particle surface and (d) impregnating with an alkali cpd. Catalyst contains Pd and/or Pd cpds. and alkali cpds., together with Cd cpds. and/or Au or Au cpds., on particles of a SiO2 or SiO2/Al2O3 substrate which is obtd. by pressing with the binder aid consisting of Li, Mg, Al, Zn, Fe and/or Mn 2-26C carboxylate(s), and igniting for 0.25-5 hrs. at 500-900 deg. C in oxgyen-contg. gas, to give a prod. with surface area 50-250 m2/g, pore vol. 0.4-1.2 ml/g and particle size 1-15mm, in which 5-20 vol. % of the pores have radius = 200-3000 Angstrom and 50-90 vol. % have radius = 70-100 Angstrom. Acid in (a) is pref. HCl, H2SO4, H3PO4 or HNO3, pref. HCl, the base in (c) is an alkali hydroxide, and a potassium cpd. is used in stage (d). Pref. (I) is obtd. by mixing glass microspheres (silica/alumina; at least 95 wt. % silica; obtd. by flame hydrolysis) with 10-20C Mg or Al carboxylate, pressing and igniting as above to give 5-7mm pellets, washing for 10-14 hours, with 10-20% HCl, drying impregnating with a soln. of PdCl2 and AuCl3 or Cd salt (chloride, nitrate etc.), precipitating with NaOH soln., impregnating with KOAc and drying; vinyl acetate prodn. is carried out at 120-200 deg. C and 1-20 bar, using a gas mixt. contg. not above 10 vol. % oxygen.

公开(公告)号：CZ9201903A3

公开(公告)日：1993-01-13

申请号：CS190392

申请日：1992-06-19

Applicant: HOECHST AG

Inventor： WIRTZ PETER DR ,  WORNER KARL-FRED DR ,  WUNDER FRIEDRICH DR ,  EICHLER KLAUS DR ,  ROSCHER GUNTER DR ,  NICOLAU IOAN DR

IPC: B01J23/44 ,  B01J23/06 ,  B01J23/48 ,  B01J23/52 ,  B01J23/58 ,  B01J23/60 ,  B01J23/66 ,  B01J23/89 ,  B01J35/10 ,  B01J37/00 ,  B01J37/02 ,  C07B61/00 ,  C07C67/05 ,  C07C67/055 ,  C07C69/15 ,  B01J23/54

CPC classification number: B01J37/0205 ,  B01J23/58 ,  B01J23/60 ,  C07C67/055 ,  C07C69/01 ,  C07C69/15

公开(公告)号：CZ190392A3

公开(公告)日：1993-01-13

申请号：CS190392

申请日：1992-06-19

Applicant: HOECHST AG

Inventor： WIRTZ PETER DR ,  WORNER KARL-FRED DR ,  WUNDER FRIEDRICH DR ,  EICHLER KLAUS DR ,  ROSCHER GUNTER DR ,  NICOLAU IOAN DR

IPC: B01J23/44 ,  B01J23/06 ,  B01J23/48 ,  B01J23/52 ,  B01J23/58 ,  B01J23/60 ,  B01J23/66 ,  B01J23/89 ,  B01J35/10 ,  B01J37/00 ,  B01J37/02 ,  C07B61/00 ,  C07C67/05 ,  C07C67/055 ,  C07C69/15 ,  B01J23/54

Abstract: Prodn. of catalysts (I) involves (a) washing the ignited support particles with an acid which does not react with silica or alumina, until no more binder cations are washed out, (b) impregnating with Pd and Au or Cd, (c) contacting with a soln. of a base until there is no further change in the thickness of the noble metal layer produced on the particle surface and (d) impregnating with an alkali cpd. Catalyst contains Pd and/or Pd cpds. and alkali cpds., together with Cd cpds. and/or Au or Au cpds., on particles of a SiO2 or SiO2/Al2O3 substrate which is obtd. by pressing with the binder aid consisting of Li, Mg, Al, Zn, Fe and/or Mn 2-26C carboxylate(s), and igniting for 0.25-5 hrs. at 500-900 deg. C in oxgyen-contg. gas, to give a prod. with surface area 50-250 m2/g, pore vol. 0.4-1.2 ml/g and particle size 1-15mm, in which 5-20 vol. % of the pores have radius = 200-3000 Angstrom and 50-90 vol. % have radius = 70-100 Angstrom. Acid in (a) is pref. HCl, H2SO4, H3PO4 or HNO3, pref. HCl, the base in (c) is an alkali hydroxide, and a potassium cpd. is used in stage (d). Pref. (I) is obtd. by mixing glass microspheres (silica/alumina; at least 95 wt. % silica; obtd. by flame hydrolysis) with 10-20C Mg or Al carboxylate, pressing and igniting as above to give 5-7mm pellets, washing for 10-14 hours, with 10-20% HCl, drying impregnating with a soln. of PdCl2 and AuCl3 or Cd salt (chloride, nitrate etc.), precipitating with NaOH soln., impregnating with KOAc and drying; vinyl acetate prodn. is carried out at 120-200 deg. C and 1-20 bar, using a gas mixt. contg. not above 10 vol. % oxygen.