Title:
METHOD FOR PRODUCING A CATALYZER FOR CONVERTING SO¿2? INTO SO¿3?
Document Type and Number:
WIPO Patent Application WO/2001/036098
Kind Code:
A1
Abstract:
The invention relates to the production of catalyzers for converting SO¿2? into SO¿3? using worked-out vanadium catalyzers. The method consists of leaching active components in pulp, their separation from a solid sediment by filtration, the treatment of the filtrate and the sediment, its mixing with the active components of the filtrate the introduction of components of a fresh contact mass, and drying and forming. The aim is to increase the utilisation of the worked-out catalyzer while maintaining its high performance characteristics . To this end the sediment is treated after filtration with an alkali solution with a mole ratio SiO¿2?(K¿2?O+Na¿2?O)-V¿2?O¿5? of 2.5 to 29.8, with a subsequent co-precipitation of SiO¿2? and V¿2?O¿5? with the help of the filtrate or sulphuric acid. V¿2?O¿5? can be precipitated from the filtrate with the help of the alkali and then used for mixing with the active components. In the degree of extraction of SiO¿2? is equal to 1.0, the worked-out vanadium catalyzer can be used without being crushed.
Inventors:
MANAEVA LUBOV (RU)
MALKIMAN VENIAMIN (RU)
MALKIMAN VENIAMIN (RU)
Application Number:
PCT/RU1999/000424
Publication Date:
May 25, 2001
Filing Date:
November 09, 1999
Export Citation:
Assignee:
MANAEVA LUBOV (RU)
MALKIMAN VENIAMIN (RU)
MALKIMAN VENIAMIN (RU)
International Classes:
B01J23/22; (IPC1-7): B01J37/04; B01J23/22
Foreign References:
| SU55615A1 | 1938-11-30 | |||
| SU72708A1 | 1947-11-30 | |||
| GB1526873A | 1978-10-04 | |||
| EP0450680A2 | 1991-10-09 | |||
| US5108976A | 1992-04-28 | |||
| US5215953A | 1993-06-01 |
Attorney, Agent or Firm:
Stakhrovskaya, Tatiyana Evgenievna (RU)
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