Patent ID: 7067097

Claim:
A process of producing a diamond substance with a first inner nozzle and a second outer nozzle, comprising the steps of: (a) forming a first mixture comprised of oxygen gas and a hydrocarbon gas within said first inner nozzle, wherein: 1. such hydrocarbon gas contains from about 1.01 to about 1.1 moles of carbon for each mole of oxygen present in such first mixture, and 2. said first mixture contains at least about 10 volume percent of hydrocarbon gas, (b) igniting said first mixture to produce a flame core; (c) forming a second mixture comprised of hydrogen and oxygen in said outer nozzle, wherein: 1. said second mixture is comprised of at least 2 moles of said hydrogen for each mole of said oxygen present in the second mixture, 2. hydrogen gas and oxygen gas comprise at least about 20 volume percent of said second mixture, 3. said second mixture contains up to about 5 volume percent of hydrocarbon gas; (d) igniting said second mixture to produce a flame sheath; (e) disposing said flame sheath around said flame core so that said flame sheath completely surrounds said flame core and completely shields said flame core from the ambient atmosphere, thereby producing a composite flame; and (f) contacting said composite flame with a substrate.