Union Carbide Corporation

Clifford M Detz

John Bernard Lightstone

George Barvinchak

An oriented graphite layer is formed on a metallic substrate by providing a coating of particulate carbon thereon, heating the coated substrate in a non-reactive atmosphere to a temperature of between 800.degree. and 1350.degree. C. for saturational diffusion of carbon into the substrate and cooling to a temperature below about 200.degree. C., thereby providing a precipitated oriented graphite film at the surface of the substrate. The substrate may be formed by covering a copper or copper alloy member with a continuous layer of nickel, cobalt, nickel alloy or cobalt alloy. In another embodiment, the substrate with an attached graphite coating is spirally bonded onto a copper tube for use in the field of condensation heat transfer.

Oriented graphite layer and formation

A process for the removal of pyrite from coal wherein an aqueous slurry containing finely-divided coal particles is subjected to the action of iron and sulfur oxidizing microorganisms selected from the Thiobacillus ferrooxidans group in a concentration range of between about 3.times.10.sup.10 and 1.times.10.sup.12 cells per gram of pyrite present in the coal slurry.

Microbial desulfurization of coal

A method for stabilizing acetylene against explosive decomposition comprising mixing together with the acetylene a chemical free radical scavenging agent chosen from the group consisting of nitric oxide, hydrogen chloride, hydrogen bromine, hydrogen iodide and vinyl bromine as well as mixtures thereof.

Growing community of inventors

White Plains, NY, United States of America

Clifford M Detz