Water-repellent reduced iron ore

Claim 2

A process for rendering chemically active iron surfaces passive and water repellent which comprises partially passivating the iron surface at a temperature of about 600*-1,300* F. such that at least about 0.5 percent oxygen is present on the surface of the iron in the form of iron oxide, then contacting the partially passivated iron surface with a liquid mixture comprising (i) a polymerizable silicone selected from the group consisting of oil soluble and water soluble silicones, the silicone being present in an amount ranging from about 0.5 to about 3 weight percent, based on total liquid, (ii) a polymerizable hydrocarbon olefin mixture having an average carbon number ranging from about C20 to about C60 and having about 2 to 15 weight percent, based on olefin, or polyenes, the olefin being present in an amount ranging from about 10 to about 50 weight percent, and (iii) a hydrophobic organic compound selected from the group consisting of C6-C20 alcohols, aldehydes, esters, carboxylic acids, and mixtures of at least two of the foregoing, polymerizing both the silicone and the olefin and reacting the hydrophobic compound with the partially passivated iron surface, and forming a discontinuous, hydrophobic film on the surface of the iron, thereby rendering the iron surface passive and water repellent.

Claim 3

A process for rendering reduced iron ore passive and water repellent which comprises contacting the iron surface with a liquid mixture consisting essentially of a hydrophobic organic compound, a polymerizable olefin mixture and from about 0.5 weight percent to about 3 weight percent of a polymerizable silicone, said hydrophobic organic compound being selected from the group consisting of alcohols, aldehydes, carboxylic acids, esters and mixtures of at least two of the foregoing, said polymerizable olefin mixture having an average carbon number in the range of about C20-C60 and containing at least about 2 percent polyenes based on total weight of olefins, and said polymerizable silicone being selected from the group consisting of oil soluble and water soluble silicones; and exposing the contacted iron surface to conditions sufficient to cause polymerization of the olefin mixture and silicone and reaction of the hydrophobic compound with the surface of the iron thereby forming a discontinuous hydrophobic deposit on the surface of the iron which renders the surface water repellent passive.

Claim 4

A process for rendering a chemically active iron surface passive to back oxidation and water repellent by forming a film thereon which is substantially impervious to moisture which comprises contacting the surface of the iron with a liquid mixture containing about 0.5 to about 3 weight percent of a polymerizable silicone, a polymerizable liquid olefin mixture, and a hydrophobic organic compound, said polymerizable silicone being selected from the group consisting of oil soluble and water soluble silicones, said polymerizable liquid olefin mixture having an average carbon number ranging from about C20 to about C60 and containing about 2 to 15 weight percent polyenes based on total olefin, and said hydrophobic organic compound being selected from the group consisting of alcohols, aldehydes, esters, carboxylic acids and mixtures of at least two of the foregoing; reacting the hydrophobic compound with the surface of the iron and polymerizing the silicone and olefin on the surface of the iron, and forming a film on the surface of the metal, thereby rendering the chemically active iron surface passive at water repellent.

Claim 5

A process for rendering a chemically active iron surface passive to back oxidation and water repellent by forming a film thereon which is substantially impervious to moisture which comprises contacting the surface of the iron with a liquid mixture containing about 0.5- 3 weight percent of a polymerizable silicone selected from the group consisting of oil soluble and water soluble silicones and a hydrophobic organic compound selected from the group consisting of alcohol, aldehydes, esters, carboxylic acids and mixtures of at least two of the foregoing, reacting the hydrophobic compound with the surface of the iron and polymerizing the silicone, and forming a film on the surface of the metal, thereby rendering the chemically active iron surface passive and water repellent.

Claim 6

The process of claim 6 wherein the chemically active iron surface is partially passivated prior to contacting with the liquid mixture such that the surface contains a small amount of oxygen in the form of iron oxide.

Claim 7

The process of claim 6 wherEin the temperature of the metal surface at the time of contacting ranges from about 300* to 700* F. and the temperature of the liquid mixture at the time of contacting ranges from about 80* to 200* F.

Claim 8

The process of claim 6 wherein the hydrophobic compound has a carbon number ranging from about 6 to 20.

Claim 9

The process of claim 6 wherein the hydrophobic compound is decyl alcohol.

Claim 10

The process of claim 6 wherein the hydrophobic compound comprises the oxo bottoms fraction from the oxonation of olefins.

Claim 11

The process of claim 6 wherein the silicone is represented by the generic formula wherein R may be the same or different and is selected from the group consisting of hydrogen and monovalent hydrocarbyl radicals, and M is a Group I metal of the Periodic Chart of the Elements.

Claim 12

An article of manufacture comprising reduced iron metal particles coated with about 0.5 to about 5 weight percent, based on iron, or hydrophobic film comprising polymerized silicone, a hydrophobic compound and polymerized product of an olefin mixture, said polymerized silicone ranging from about 0.5 to about 3 weight percent, based on the coating, said hydrophobic compound being selected from the group consisting of alcohols, aldehydes, esters, carboxylic acids, and mixtures of at least two of the foregoing, and said polymerized product of an olefin mixture having an average carbon number ranging from about C20 to about C60 and containing at least 2 weight percent, based on olefin, of polyenes.

Claim 13

An article of manufacture comprising reduced iron metal particles coated with about 0.05 to about 5 weight percent, based on iron, of hydrophobic film comprising polymerized silicone and a hydrophobic compound selected from the group consisting of alcohols, aldehydes, esters, carboxylic acids, and mixtures of at least two of the foregoing, said polymerized silicone ranging from about 0.5 to about 3 weight percent based on the coating.

Claim 14

The article of claim 14 wherein the iron particles are in a compacted form.