FR2384542A1 - Procede de preparation d'un catalyseur au carbure de tungstene - Google Patents
Procede de preparation d'un catalyseur au carbure de tungsteneInfo
- Publication number
- FR2384542A1 FR2384542A1 FR7808785A FR7808785A FR2384542A1 FR 2384542 A1 FR2384542 A1 FR 2384542A1 FR 7808785 A FR7808785 A FR 7808785A FR 7808785 A FR7808785 A FR 7808785A FR 2384542 A1 FR2384542 A1 FR 2384542A1
- Authority
- FR
- France
- Prior art keywords
- preparing
- carbon
- carbide catalyst
- tungsten
- diffusion
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J27/00—Catalysts comprising the elements or compounds of halogens, sulfur, selenium, tellurium, phosphorus or nitrogen; Catalysts comprising carbon compounds
- B01J27/20—Carbon compounds
- B01J27/22—Carbides
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Catalysts (AREA)
- Carbon And Carbon Compounds (AREA)
- Inert Electrodes (AREA)
Abstract
L'invention concerne un procédé de préparation d'un catalyseur au carbure de tungstène par carburation d'oxyde de tungstène en utilisant un mélange de monoxyde de carbone et de dioxyde de carbone. La réduction de l'oxyde de tungstène se déroule plus lentement que la diffusion du carbone dans le tungstène ou dans le carbure de tungstène déjà formé et cette diffusion est plus rapide que la séparation du carbone de la phase gazeuse. Activité améliorée.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2713308A DE2713308C2 (de) | 1977-03-25 | 1977-03-25 | Verfahren zur Herstellung eines Wolframcarbidkatalysators |
Publications (1)
Publication Number | Publication Date |
---|---|
FR2384542A1 true FR2384542A1 (fr) | 1978-10-20 |
Family
ID=6004713
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR7808785A Withdrawn FR2384542A1 (fr) | 1977-03-25 | 1978-03-24 | Procede de preparation d'un catalyseur au carbure de tungstene |
Country Status (7)
Country | Link |
---|---|
US (1) | US4172808A (fr) |
JP (1) | JPS53119289A (fr) |
BE (1) | BE865249A (fr) |
DE (1) | DE2713308C2 (fr) |
FR (1) | FR2384542A1 (fr) |
GB (1) | GB1597196A (fr) |
NL (1) | NL7802301A (fr) |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB8708604D0 (en) * | 1987-04-10 | 1987-05-13 | Grieveson P | Making carbides of high-melting metals |
US4925746A (en) * | 1987-08-10 | 1990-05-15 | Zentralna La Boratoria Po Elektrochimicheski Iztochnici Na Tok | Device for recombing hydrogen and oxygen released in lead-acid storage batteries |
DE3814112A1 (de) * | 1987-08-13 | 1989-02-23 | Ts Lab Elektrochimitscheski Is | Vorrichtung zur rekombination von sich in bleiakkumulatoren ausscheidendem wasserstoff und sauerstoff |
CN1044798C (zh) * | 1995-09-29 | 1999-08-25 | 中国科学院固体物理研究所 | 尺寸可控纳米级碳化钨的制备方法 |
US5919428A (en) * | 1996-12-05 | 1999-07-06 | Nanodyne Incorporated | Method of forming tungsten carbide particles |
DE19852459A1 (de) | 1998-11-13 | 2000-05-18 | Starck H C Gmbh Co Kg | Verfahren zur Herstellung von Wolframkarbiden durch Gasphasenkarburierung |
US6623720B2 (en) | 2000-03-31 | 2003-09-23 | The Regents Of The University Of Michigan | Transition metal carbides, nitrides and borides, and their oxygen containing analogs useful as water gas shift catalysts |
US6524366B1 (en) | 2000-09-22 | 2003-02-25 | N.V. Union Miniere S.A. | Method of forming nanograin tungsten carbide and recycling tungsten carbide |
US20020172641A1 (en) * | 2001-03-26 | 2002-11-21 | N.V. Union Miniere S.A. | Method of using molybdenum carbide catalyst |
US7625542B2 (en) * | 2003-04-25 | 2009-12-01 | Inframat Corporation | Method for the production of metal carbides |
CN108907218B (zh) * | 2018-07-26 | 2021-11-19 | 江西理工大学 | Co-co2混合气氛还原氧化钨制备超细钨粉的方法 |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2755228A (en) * | 1952-02-25 | 1956-07-17 | Gulf Research Development Co | Hydroreforming employing carbide catalysts |
DE1916340A1 (de) * | 1969-03-29 | 1971-04-08 | Licentia Gmbh | Verfahren zur Herstellung eines Wolframcarbidkatalysators fuer Brennstoffzellen |
DE2149523A1 (de) * | 1971-10-04 | 1973-04-12 | Bosch Gmbh Robert | Katalysator fuer die ammoniaksynthese |
FR2198786A1 (fr) * | 1972-09-12 | 1974-04-05 | Siemens Ag | |
US3902917A (en) * | 1970-06-04 | 1975-09-02 | Bosch Gmbh Robert | Process for the production of tungsten carbide catalyst adapted for use in fuel cells |
DE2553373A1 (de) * | 1974-12-11 | 1976-06-16 | United Technologies Corp | Verfahren zur herstellung von wolframkarbid |
-
1977
- 1977-03-25 DE DE2713308A patent/DE2713308C2/de not_active Expired
-
1978
- 1978-03-01 JP JP2214778A patent/JPS53119289A/ja active Pending
- 1978-03-02 NL NL7802301A patent/NL7802301A/xx not_active Application Discontinuation
- 1978-03-09 GB GB9439/78A patent/GB1597196A/en not_active Expired
- 1978-03-17 US US05/887,530 patent/US4172808A/en not_active Expired - Lifetime
- 1978-03-23 BE BE186221A patent/BE865249A/fr not_active IP Right Cessation
- 1978-03-24 FR FR7808785A patent/FR2384542A1/fr not_active Withdrawn
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2755228A (en) * | 1952-02-25 | 1956-07-17 | Gulf Research Development Co | Hydroreforming employing carbide catalysts |
DE1916340A1 (de) * | 1969-03-29 | 1971-04-08 | Licentia Gmbh | Verfahren zur Herstellung eines Wolframcarbidkatalysators fuer Brennstoffzellen |
US3902917A (en) * | 1970-06-04 | 1975-09-02 | Bosch Gmbh Robert | Process for the production of tungsten carbide catalyst adapted for use in fuel cells |
DE2149523A1 (de) * | 1971-10-04 | 1973-04-12 | Bosch Gmbh Robert | Katalysator fuer die ammoniaksynthese |
FR2198786A1 (fr) * | 1972-09-12 | 1974-04-05 | Siemens Ag | |
DE2553373A1 (de) * | 1974-12-11 | 1976-06-16 | United Technologies Corp | Verfahren zur herstellung von wolframkarbid |
Also Published As
Publication number | Publication date |
---|---|
DE2713308B1 (de) | 1978-05-18 |
US4172808A (en) | 1979-10-30 |
DE2713308C2 (de) | 1979-04-19 |
NL7802301A (nl) | 1978-09-27 |
JPS53119289A (en) | 1978-10-18 |
BE865249A (fr) | 1978-07-17 |
GB1597196A (en) | 1981-09-03 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
ST | Notification of lapse |