Nitric Acid → Lanthanum sesquioxide

HRID 394414

Reaction equation

HRID 394414 reaction equation
[O:1](Cl)Cl.[Zr:4].[OH-:5].[Zr+4].[OH-].[OH-].[OH-].[N+]([O-])(O)=[O:11].[Ce:14].[La:15]>>[O-2:1].[Zr+4:4].[O-2:11].[O-2:5].[Ce+3:14].[O-2:1].[O-2:1].[Ce+3:14].[O-2:1].[La+3:15].[O-2:1].[O-2:1].[La+3:15]

Participants

8

Reactant 5

HCID 944Nitric AcidHCID 23926LanthanumHCID 23974CeriumHCID 84465Zirconium hydroxide (Zr(OH)4), (T-4)-2×HCID 71304769Chloro hypochlorite;zirconium

Product 3

HCID 150906Lanthanum sesquioxideHCID 6452892Zirconium oxideHCID 9905479Cerium oxide

Procedure

A zirconium-cerium-lanthanum composite oxide (Powder A1) was obtained by hydrolyzing a zirconium oxychloride solution thereby obtaining zirconium hydroxide, adding an aqueous nitric acid solution of cerium and lanthanum to the zirconium hydroxide and mixing them together, neutralizing the resultant mixture by addition of an alkali, washing, drying at 120° C. for two hours and calcining at 700° C. for one hour the product of neutralization, with the relevant components used in amounts calculated to form a weight ratio of 40 g of zirconium oxide, 20 g of cerium oxide, and 15 g of lanthanum oxide.

Workup

  1. additionmixing them together
  2. additionby addition of an alkali,
  3. washwashing
  4. customdrying at 120° C. for two hours

Sources & evidence

ORD record
ord-83c72e353ec04bd482eb10dab9a2277c
Source dataset
uspto-grants-2003_08
Patent number
US06602479B2

Linked notes

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