Catalyst for decomposing n2o, its use, and process for its...

B - Operations – Transporting – 01 – J

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

B01J 23/78 (2006.01) B01D 53/86 (2006.01)

Patent

CA 2399466

A process is described for the decomposition of N2O during nitric acid production by bringing the N2O-containg waste gas leaving the absorption column into contact with a catalyst which comprises at least one oxidic cobalt compound and at least one oxidic magnesium compound, under conditions which permit conversion of N2O to gaseous nitrogen and oxygen. The content of oxidic cobalt compounds is in the range from 0.1 to 50% by weight and the content of oxidic magnesium compounds is in the range from 50 to 99.9% by weight, based in each case on the total weight of the catalyst, and at least 30% of the Co atoms present in the catalyst are present in the trivalent state. The preparation of the catalyst involves dry mixing of the oxidic cobalt compounds and the oxidic magnesium compounds or of appropriate precursors which are converted into the oxidic compounds by heat treatment, and compacting the mix, with exclusion of water, so that the resultant catalyst has the desired envelope density.

La présente invention concerne un procédé de dégradation du N2O lors de la production d'acide nitrique par mise en contact des gaz d'échappement à base de N2O s'échappant de la colonne d'absorption, avec un catalyseur. Ledit catalyseur comprend au moins un composé cobalt oxydique et au moins un composé magnésium oxydique choisis parmi les composées de ce type qui permettent une transformation de N2O en azote et oxygène gazeux. La teneur en composés cobalt oxydiques vaut de 0,1 à 50 % en poids et la teneur en composés magnésium oxydiques vaut de 50 à 99,9 % en poids, ces pourcentages se basant chacun sur la masse totale du catalyseur. Au moins 30 % des atomes de cobalt contenu dans le catalyseur se trouvent à l'état trivalent. La préparation du catalyseur fait intervenir le mélange à sec des composés cobalt oxydiques et des composés magnésium oxydiques ou de leurs précurseurs respectifs qui se transforment en composés oxydiques par recuit, et la compression du mélange réalisée en même temps que l'expulsion d'eau, de sorte que le catalyseur obtenu présente la densité volumique souhaitée.

LandOfFree

Say what you really think

Search LandOfFree.com for Canadian inventors and patents. Rate them and share your experience with other people.

Rating

Catalyst for decomposing n2o, its use, and process for its... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Catalyst for decomposing n2o, its use, and process for its..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Catalyst for decomposing n2o, its use, and process for its... will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFCA-PAI-O-1763947

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.