Process for producing catalysts and impregnating solutions and c

Details Process for producing catalysts and impregnating solutions and c Process for producing catalysts and impregnating solutions and c

1991-03-22

1992-05-26

Shine, W. J.

Catalyst, solid sorbent, or support therefor: product or process

Catalyst or precursor therefor

Sulfur or compound containing same

423535, B01J 2322, B01J 27055

Patent

active

051167980

ABSTRACT:
A catalyst which contains vanadium oxide and alkali compounds and serves to oxidize SO.sub.2 to SO.sub.3 is produced in that prefabricated carrier bodies are impregnated with impregnating solutions which contain vanadium and alkalis, the impregnated carrier bodies are thermally treated at elevated temperature and this is followed by an activation under oxidizing conditions at a temperature from 750.degree. C. to 1000.degree. C. In the production of the impregnating solutions, fine-grained V.sub.2 O.sub.5 is dissolved in an acid aqueous medium with addition of a reducing agent and a reduction to form VO.sup.2+ is effected, acid and reducing agent are used in approximately stoichiometric amounts for the dissolution and reduction of V.sub.2 O.sub.5. The alkalis are used in the form of salts. The solution is adjusted to contain SO.sub.4 in an amount which is sufficient to combine the entire amount of the alkalis in neutral sulfates during the drying and activation.

REFERENCES:
patent: 4126578 (1978-11-01), Sherif
patent: 4184980 (1980-01-01), Sherif et al.
patent: 4193894 (1980-03-01), Villadsen
patent: 4431573 (1984-02-01), Fennemann et al.
patent: 4539309 (1985-09-01), Meissner et al.
patent: 4680281 (1987-07-01), Fennemann
patent: 4766104 (1988-08-01), Fennemann

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