Process for producing a catalyst for reducing nitrogen oxides in

Catalyst – solid sorbent – or support therefor: product or process – Catalyst or precursor therefor – Metal – metal oxide or metal hydroxide

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

423239, B01J 2106, B01J 2322, B01J 2328

Patent

active

050455168

ABSTRACT:
A catalyst for reducing the nitrogen oxides in flue gases by a reducing agent and a catalytically active composition is described. The catalyst increases resistance to catalyst poisons such as arsenic trioxide. The composition contains 60-90% by weight of titanium, 10-30% by weight of molybdenum, and 0-10% by weight of vanadium, as their respective oxides. A very pure titanium dioxide having less than 500 ppm of calcium and less than 100 ppm of iron, and being 60% in the anastase modification. It has a mean particle size of 10 to 100 nm, a mean pore radius of 10 to 30 nm and a BET surface of 10 to 80 m.sup.2 per gram. The catalyst is prepared by wet-grinding a suspension of the titanium dioxide with the vanadium pentoxide and molybdenum trioxide mill in stated proportions. The suspension is then dried, and precalcined for several hours at 450.degree. to 550.degree. C. The precalcined material is comminuted to smaller than 180 .mu.m. The pulverized material is then mixed with water and coated on to metal substrate, dried and then calcined for several hours at 450.degree. to 550.degree. C.

REFERENCES:
patent: 3614809 (1971-10-01), Hayes et al.
patent: 3632709 (1972-01-01), Hayes et al.
patent: 4085193 (1978-04-01), Nakajima et al.
patent: 4466947 (1984-08-01), Imanari et al.
patent: 4891348 (1990-01-01), Imanari et al.

LandOfFree

Say what you really think

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

Rating

Process for producing a catalyst for reducing nitrogen oxides in does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Process for producing a catalyst for reducing nitrogen oxides in, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for producing a catalyst for reducing nitrogen oxides in will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-1009293

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