Tungsten → Oxotungsten

HRID 1445317Notes

Reaction equation

HRID 1445317 reaction equation
[W:1].[OH2:2].O.O.O.[Ti:6].[NH4+].[O-:8][V:9](=O)=O>O>[O-2:8].[Ti+4:6].[O-2:2].[W:1]=[O:2].[O-2:8].[O-2:8].[O-2:8].[O-2:8].[O-2:8].[V+5:9].[V+5:9]

Participants

7

Reactant 3

HCID 23964TungstenHCID 516859Ammonium metavanadateHCID 1140074520338-08-3

Product 3

HCID 139486OxotungstenHCID 162651Titanium oxide (Ti3O)HCID 178419084HCID 178419084, compound

Reagents, catalysts & solvents 1

HCID 962WaterSolvent

Procedure

A predetermined amount of an aqueous solution of ammonium paratungstate was added to metatitanic acid, and the mixture was calcined. An aqueous solution of ammonium metavanadate was added to the calcination product, and proper amounts of a molding adjuvant and water were added, followed by kneading the mixture. The kneading product was extruded into a lattice form (width 150 mm, height 150 mm, length 885 mm, pitch size 7 mm) by an extruder. The extrudate was dried (120° C.) and calcined (550° C.) to obtain a honeycomb-shaped denitrification catalyst (composition: 75 wt. % titanium oxide, 10 wt. % tungsten oxide, 0.5 wt. % vanadium pentoxide, and 14.5 wt. % remainder).

Workup

  1. additionwere added
  2. customThe extrudate was dried (120° C.)
  3. custom(550° C.)

Sources & evidence

ORD record
ord-4679b67583984893b1eb5bd3e8c34ae1
Source dataset
uspto-grants-2010_02
Patent number
US07666808B2

Reaction notes

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