Method of making pigment

Claim 1

IN THE METHOD OF MAKING A PARTICULATE, SOLID PRODUCT COMPRISING SILICON MONOXIDE BY REACTING A SILICONCONTAINING MATERIAL SELECTED FROM THE GROUP CONSISTING OF SILICA, SAND, QUARTZ AND MINERAL SILICATES AT SUFFICIENTLY ELEVATED TEMPERATURES OF AT LEAST ABOUT 1500 TO 2000* C. IN A FIRST ZONE IN THE PRESENCE OF A CARBONACEOUS REDUCING AGENT TO PRODUCE SILICON-MONOXIDE GAS AND THEN CONDENSING SAID GAS TO OBTAIN A SOLID THE IMPROVEMENT COMPRISING CONTINUOUSLY REACTING SAID SILICON-CONTAINING MATERIAL AND REDUCING AGENT TO PRODUCE SILICON MONOXIDE GASM CONTINUOUSLY DELIVERING ENVELOPING SAID SILICON A SECOND ZONE, CONTINUOUSLY ENVELOPING SAID SILICON MONOXIDE GAS IN SAID SECOND ZONE WITH AN ESSENTIALLY PURE CONDENSING GAS INERT TO SAID SILICON-MONOXIDE GAS TO MIX WITH SAID SILICON-MONOXIDE GAS AND FROM A GAS STREAM EXHIBITING LAMELLAR FLOW ESSENTIALLY FREE OF TURBULENCE, SAID SILICON-MONOXIDE GAS COOLING AND CONDENSING IN THE PRESENCE OF SAID INERT GAS TO FROM A PARTICULATE. SOLID SILICON-MONOXIDE PRODUCT HAVING THE GENERAL FORMULA