Appeal No. 96-2884
Application No. 08/181,997
APPENDIX
Claims 1, 23 and 41 are illustrative and read as follows:
1. A method for producing iron carbide, comprising the steps of:
(a) first contacting a feed material comprising iron with a first gas comprising
hydrogen to produce a first product comprising metallic iron, wherein said first product
contains no more than about 35 percent by weight iron carbide; and
(b) second contacting said first product with a second gas to produce a second
product comprising iron carbide, wherein said second gas comprises (i) a first component
selected from the group consisting of carbon monoxide, carbon dioxide and mixtures thereof
to provide a carbon source to convert said first product into iron carbide; (ii) a second
component comprising hydrogen gas to inhibit the formation of free carbon in said second
product; and (iii) a third component comprising methane to inhibit the back conversion of
said iron carbide into metallic iron.
23. A method for converting iron oxide into iron carbide, comprising the steps
of:
(a) contacting in a first reaction zone an iron oxide-containing feed material
with a first gas comprising hydrogen gas to convert said iron oxide-containing feed material
into a metallic iron-containing product; and
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