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Binary ferrihydrite catalysts

Patent ·
OSTI ID:870718
 [1];  [1];  [1]
  1. Lexington, KY
+ Show Author Affiliations
A method of preparing a catalyst precursor comprises dissolving an iron salt and a salt of an oxoanion forming agent, in water so that a solution of the iron salt and oxoanion forming agent salt has a ratio of oxoanion/Fe of between 0.0001:1 to 0.5:1. Next is increasing the pH of the solution to 10 by adding a strong base followed by collecting of precipitate having a binary ferrihydrite structure. A binary ferrihydrite catalyst precursor is also prepared by dissolving an iron salt in water. The solution is brought to a pH of substantially 10 to obtain ferrihydrite precipitate. The precipitate is then filtered and washed with distilled water and subsequently admixed with a hydroxy carboxylic acid solution. The admixture is mixed/agitated and the binary ferrihydrite precipitate is then filtered and recovered.
Research Organization:
Consortium for Fossil Fuel Liquefaction Science, Lexington, KY (United States)
DOE Contract Number:
FC22-90PC90029
Assignee:
University of Kentucky Research Foundation (Lexington, KY)
Patent Number(s):
US 5580839
OSTI ID:
870718
Country of Publication:
United States
Language:
English

References (5)

Influence of Silicon and Phosphorus on Structural and Magnetic Properties of Synthetic Goethite and Related Oxides journal January 1988
Binary iron oxide catalysts for direct coal liquefaction journal January 1994
Organic Acid Treatment of Ferrihydrite Catalyst for Improved Coal Liquefaction journal September 1994
Finely dispersed iron, iron-molybdenum, and sulfated iron oxides as catalysts for coprocessing reactions journal September 1991
The Influence of [Fe(II)], [Si], and pH on the formation of lepidocrocite and ferrihydrite during oxidation of aqueous FeCl 2 solutions journal September 1976

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Related Subjects

/502/
0001
10
acid
acid solution
adding
admixed
admixture
agent
agitated
base
binary
brought
carboxylic
carboxylic acid
catalyst
catalyst precursor
catalysts
collecting
comprises
comprises dissolving
dissolving
distilled
distilled water
ferrihydrite
filtered
followed
forming
forming agent
hydroxy
hydroxy carboxylic
increasing
iron
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method
mixed
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oxoanion
oxoanion forming
ph
precipitate
precursor
prepared
preparing
ratio
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salt
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strong
strong base
structure
subsequently
substantially
washed
water