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Machine translation
1. (WO1988006917) ACTIVITY STABILIZATION AND REACTIVATION OF HETEROPOLYACID CATALYSTS
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/1988/006917    International Application No.:    PCT/DE1988/000144
Publication Date: 22.09.1988 International Filing Date: 15.03.1988
IPC:
B01J 27/188 (2006.01), B01J 27/198 (2006.01), B01J 27/199 (2006.01), B01J 27/28 (2006.01), B01J 38/68 (2006.01), C07C 51/377 (2006.01)
Applicants: RÖHM GMBH [DE/DE]; Kirschenallee, D-6100 Darmstadt (DE) (For All Designated States Except US).
LANGERBEINS, Klaus [DE/DE]; (DE) (For US Only).
JELITTE, Rüdiger [DE/DE]; (DE) (For US Only).
RUPPERT, Wolfgang [DE/DE]; (DE) (For US Only).
EMIG, Gerhard [DE/DE]; (DE) (For US Only).
WATZENBERGER, Otto [DE/DE]; (DE) (For US Only)
Inventors: LANGERBEINS, Klaus; (DE).
JELITTE, Rüdiger; (DE).
RUPPERT, Wolfgang; (DE).
EMIG, Gerhard; (DE).
WATZENBERGER, Otto; (DE)
Priority Data:
P 37 08 627.8 17.03.1987 DE
P 38 07 364.1 07.03.1988 DE
P 38 07 363.3 07.03.1988 DE
Title (EN) ACTIVITY STABILIZATION AND REACTIVATION OF HETEROPOLYACID CATALYSTS
(FR) STABILISATION DE L'ACTIVITE ET REACTIVATION D'HETEROPOLYACIDES CATALYSEURS
Abstract: front page image
(EN)Activity stabilization and/or reactivation of molybdo-heteropolyacid catalysts during oxidization in gaseous phases, such as the oxyhydrogenation of isobutyric acid or its lower esters to methacrylic acid or its lower esters, by means of oxidizing treatment of the catalyst, compounds of catalyst component parts being added to a gas containing oxygen at a temperature in the region of between 200 and 400°C. Said methods of activation may be carried out during the catalytic reaction in the gaseous phases, particularly during oxyhydrogenation, for example, as well as intermittently with said reaction, and may also be carried out with partial spatial separation between the two reactions.
(FR)On stabilise l'activité et/ou on réactive par oxydation des molybdo-hétéropolyacides catalyseurs lors de l'oxydation de phases gazeuses telles que l'oxydodéshydrogénation d'acide isobutyrique ou de ses esters inférieurs qui les convertit en acide méthacrylique ou en ses esters inférieurs. On ajoute aux composés d'éléments catalyseurs un gaz contenant de l'oxygène dans une plage de températures comprise entre 200 et 400°C. On peut mettre en ÷uvre ces mesures d'activation pendant la réaction de catalyse des phases gazeuses, en particulier l'oxydodéshydrogénation, en alternance avec celle-ci et le cas échéant en partie spatialement séparées l'une de l'autre.
Designated States: DE, GB, JP, NL, US.
Publication Language: German (DE)
Filing Language: German (DE)