FIELD: coal chemistry. SUBSTANCE: method involves coal oxidation (particle size is up to 3 mm) with oxygen or oxygen-nitrogen mixture in the gaseous phase in reactor with fluidized layer at 150-300 C, under partial pressure of oxygen added 0,7-5kg/cm2, total pressure 40kg/cm2, not above, contact time is 30-600 min. Gases exhausting from reactor were circulated into reactor after cooling up to 50-100 C, preferably at concentration 5-99% of total volume of depleted gas. EFFECT: improved method of humic acid preparing. 6 cl, 2 dwg, 5 tbl
| Title | Year | Author | Number |
|---|---|---|---|
| PROCESS FOR PREPARING HUMIC ACIDS | 0 |
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