Organic colloidal dispersion of iron particles, method for preparing same and use thereof as fuel additive for internal combustion engines
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United States of America Patent
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Dec 2, 2008
Grant Date -
Feb 24, 2005
app pub date -
Dec 19, 2002
filing date -
Dec 21, 2001
priority date (Note) -
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Abstract
The colloidal dispersion of the invention is characterized in that it comprises an organic phase; particles of an iron compound in its amorphous form; and at least one amphiphilic agent. It is prepared by a process in which either an iron salt in the presence of an iron complexing agent or an iron complex is reacted with a base, maintaining the pH of the reaction medium at a value of at most 8 to obtain a precipitate, the iron complexing agent being selected from hydrosoluble carboxylic acids with a complexing constant K such that the pK is at least 3 and the iron complex being selected from the products of reacting iron salts with said acids; then the precipitate obtained or a suspension containing said precipitate is brought into contact with an organic phase in the presence of an amphiphilic agent to obtain the dispersion in an organic phase. The dispersion of the invention can be used as a combustion additive in liquid fuel or motor fuel.
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