公开(公告)号：DE59503910D1

公开(公告)日：1998-11-19

申请号：DE59503910

申请日：1995-07-04

Applicant: DEGUSSA

Inventor： BRAND REINHOLD DR ,  FREUND ANDREAS DR ,  LANG JUTTA DR ,  LEHMANN THOMAS DR ,  OHMER JOHANNES DR ,  TACKE THOMAS DR ,  HEINZ GERHARD ,  SCHWARZ ROBERT

IPC: B01J23/89 ,  B01J37/03 ,  H01M4/92

Abstract: A ternary platinum alloy catalyst on a conductive carbon carrier for use in fuel cells is disclosed. For the production of the catalyst, nitrate salts are used as precursors of the alloy components and all alloy components are deposited concurrently on the carbon carrier. This method of procedure yields ageing-stable catalysts with high oxygen mass activity.

公开(公告)号：DE4443701C1

公开(公告)日：1996-08-29

申请号：DE4443701

申请日：1994-12-08

Applicant: DEGUSSA

Inventor： FREUND ANDREAS DR ,  PANSTER PETER DR

IPC: B01J23/38 ,  B01J23/40 ,  B01J23/42 ,  B01J35/00 ,  B01J35/02 ,  B01J35/10 ,  B01J37/00 ,  B01J37/02 ,  C07F15/00 ,  H01M4/90 ,  H01M4/92 ,  C07B35/02 ,  C07B35/04 ,  H01M4/96

Abstract: A shell catalyst (I) contains (A) one or more metals of Gp. VIII and/or IB on (B) a powder or formed support, these metals being in finely divided form within a shell ≤ 1200 (pref. not more than 100) nm thick, with crystallite sizes of ≤ 10 (pref.

公开(公告)号：BR9400041A

公开(公告)日：1994-07-26

申请号：BR9400041

申请日：1994-01-06

Applicant: DEGUSSA

Inventor： BANKMANN MARTIN DR ,  BRAND REINHOLD DR ,  FREUND ANDREAS DR ,  TRACKE THOMAS DR

IPC: B01J23/40 ,  B01J37/02 ,  C07C1/207 ,  C07C1/22 ,  C07C17/00 ,  C07C29/141 ,  C07C33/20 ,  C07C33/46 ,  C07C41/01 ,  C07C43/164 ,  C07C43/17 ,  C07C51/347 ,  C07C51/367 ,  C07C51/487 ,  C07C51/377 ,  C07C27/04 ,  C07C65/03 ,  C07C63/04 ,  C07C63/06 ,  C07C43/20

Abstract: The invention relates to a process for the selective catalytic hydrogenation of the carbonyl group of aromatic aldehydes of the formula in which X can be a carboxyl group, a methyl group or halogen, to give the corresponding alcohols and methyl compounds. The catalytic hydrogenation is carried out with the addition of a solvent, if appropriate in the presence of organic acids, on a shaped supported catalyst containing a metal from the platinum group on a titanium oxide support in the presence of hydrogen at partial pressure of hydrogen of 5 to 50 bar and temperatures of from 100 to 300@C.

公开(公告)号：DE4300297A1

公开(公告)日：1994-07-21

申请号：DE4300297

申请日：1993-01-08

Applicant: DEGUSSA

Inventor： BANKMANN MARTIN DR ,  BRAND REINHOLD DR ,  FREUND ANDREAS DR ,  TACKE THOMAS DR

IPC: B01J23/40 ,  B01J37/02 ,  C07C1/207 ,  C07C1/22 ,  C07C17/00 ,  C07C29/141 ,  C07C33/20 ,  C07C33/46 ,  C07C41/01 ,  C07C43/164 ,  C07C43/17 ,  C07C51/347 ,  C07C51/367 ,  C07C51/487 ,  C07B41/02 ,  C07B41/04

Abstract: The invention relates to a process for the selective catalytic hydrogenation of the carbonyl group of aromatic aldehydes of the formula in which X can be a carboxyl group, a methyl group or halogen, to give the corresponding alcohols and methyl compounds. The catalytic hydrogenation is carried out with the addition of a solvent, if appropriate in the presence of organic acids, on a shaped supported catalyst containing a metal from the platinum group on a titanium oxide support in the presence of hydrogen at partial pressure of hydrogen of 5 to 50 bar and temperatures of from 100 to 300@C.

公开(公告)号：ES2168244T3

公开(公告)日：2002-06-16

申请号：ES00111604

申请日：2000-05-31

Applicant: DEGUSSA

Inventor： OSTGARD DANIEL DR ,  FREUND ANDREAS DR ,  REHREN CLAUS DR ,  BERWEILER MONIKA ,  STEPHANI GUNTHER DR

IPC: B01J35/02 ,  B01J25/00 ,  B01J25/02 ,  B01J37/00 ,  C07B61/00 ,  C07C209/36 ,  C07C211/46

Abstract: A fixed bed catalyst of the Raney-type is produced from metal alloying fibers and/or flakes formed according to a crucible metal extraction process, and then tabletting, and pressing into mats and/or filling into cartridges.

公开(公告)号：DK1068896T3

公开(公告)日：2002-04-02

申请号：DK00111604

申请日：2000-05-31

Applicant: DEGUSSA

Inventor： OSTGARD DANIEL DR ,  FREUND ANDREAS DR ,  REHREN CLAUS DR ,  BERWEILER MONIKA ,  STEPHANI GUENTHER DR

IPC: B01J35/02 ,  B01J25/00 ,  B01J25/02 ,  B01J37/00 ,  C07B61/00 ,  C07C209/36 ,  C07C211/46

Abstract: A fixed bed catalyst of the Raney-type is produced from metal alloying fibers and/or flakes formed according to a crucible metal extraction process, and then tabletting, and pressing into mats and/or filling into cartridges.

公开(公告)号：DK0743092T3

公开(公告)日：2000-03-27

申请号：DK96106596

申请日：1996-04-26

Applicant: DEGUSSA

Inventor： FREUND ANDREAS DR ,  LEHMANN THOMAS DR ,  STARZ KARL-ANTON DR ,  HEINZ GERHARD ,  SCHWARZ ROBERT

IPC: C01B3/40 ,  B01J23/42 ,  B01J23/56 ,  B01J23/89 ,  B01J27/22 ,  C22C5/04 ,  H01M4/88 ,  H01M4/92 ,  H01M8/02

Abstract: Pt-Al alloy catalyst on a conducting carbon carrier is claimed, in which the atomic ratio of Pt to Al is 80-60: 20-40 and the alloy particles are present on the carbon carrier in carbided form with the structure of the Pt-Al carbide (Pt3AlC0.5). Prodn. of the catalyst is also claimed.

公开(公告)号：AT183946T

公开(公告)日：1999-09-15

申请号：AT96106596

申请日：1996-04-26

Applicant: DEGUSSA

Inventor： FREUND ANDREAS DR ,  LEHMANN THOMAS DR ,  STARZ KARL-ANTON DR ,  HEINZ GERHARD ,  SCHWARZ ROBERT

IPC: C01B3/40 ,  B01J23/42 ,  B01J23/56 ,  B01J23/89 ,  B01J27/22 ,  C22C5/04 ,  H01M4/88 ,  H01M4/92 ,  H01M8/02

Abstract: Pt-Al alloy catalyst on a conducting carbon carrier is claimed, in which the atomic ratio of Pt to Al is 80-60: 20-40 and the alloy particles are present on the carbon carrier in carbided form with the structure of the Pt-Al carbide (Pt3AlC0.5). Prodn. of the catalyst is also claimed.

公开(公告)号：DE19629372A1

公开(公告)日：1998-01-22

申请号：DE19629372

申请日：1996-07-20

Applicant: DEGUSSA

Inventor： HAAS THOMAS DR ,  MEIER MARTIN DR ,  BROSMER CHRISTOPH DR ,  ARNTZ DIETRICH DR ,  FREUND ANDREAS DR

IPC: C07C51/235 ,  C07C55/08 ,  C07C51/21

Abstract: In the preparation of malonic acid (I) or its salts by catalytic oxidation of a starting material (II) with 3 carbon (C) atoms with (gas) containing oxygen (O2) in the presence of a platinum-group noble metal catalyst in aqueous phase at pH \- 6 and isolation of (I) or its salts, (II) is 3-hydroxypropionaldehyde (IIA) or 3-hydroxypropionic acid (IIB) and the amount of catalyst used corresponds to

公开(公告)号：DE19629371A1

公开(公告)日：1998-01-22

申请号：DE19629371

申请日：1996-07-20

Applicant: DEGUSSA

Inventor： HAAS THOMAS DR ,  BROSMER CHRISTOPH DR ,  MEIER MARTIN DR ,  ARNTZ DIETRICH DR ,  FREUND ANDREAS DR

IPC: B01J23/40 ,  B01J23/42 ,  B01J23/44 ,  C07B61/00 ,  C07C51/235 ,  C07C59/01

Abstract: The preparation of 3-hydroxypropionic acid (I) or its salts comprises by catalytic oxidation of 3-hydroxypropionaldehyde (II) with oxygen or oxygen-containing gas in the presence of a platinum-group noble metal M as catalyst in aqueous phase and isolation of (I) or its salts. The amount of M is 10 wt.% with respect to (II).