The humic acid
uses in industry is very significant. Lignite, caustic soda and water have been widely used as coal-alkali agents.Humic acid belongs to phenolic carboxylic acid, which is more acidic than carbonic acid. So it has strong resistance to calcium ions and can be used to deal with mud and saline mud. With chromium humic acid and nitro humic acid also can produce better performance. Application of deep well drilling mud adjusting agent.That can make the drilling wall thin and tenacity of mud cake, less water loss. Strong emulsification, better thermal stability, resistance to high temperature above 200 c. My company aiming at problem of high temperature, high density wrapped water regurgitation emulsion drilling fluid loss quantity. To dissolve the lignite in lye, firstly humic acid sodium solution is estracted from lignite. Then use the modified amine compounds. Isolate oil-wet solid, dry, and ground into powder, powder thermal cracking at high temperatures, cooling , deflated. Then we could get a black solid, and ground into a fine powder. This kind of black powder is resistant to high temperature of 220 c oil-based fluid loss agent XNTR220. Which is a new type of high temperature resistant oil-base drilling fluid loss agent.