Tungsten → Oxotungsten

HRID 1783272Notes

Reaction equation

HRID 1783272 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-b2e51af4dd694c7f9c69ddbeed8ea654
Source dataset
uspto-grants-2009_03
Patent number
US07501106B2

Reaction notes

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