The product which is generated with the reaction between Calcium Lignosulphonate(main component of Sulfite pulp waste liquid) and potassium dichromate and ferrous sulfate under certain condition is called Ferric Chomium Lignin Sulfonate (abbravated as FCLS). it is brownish black powder, which is the most used organic viscosity breaking agent, with excellent resistance to salt, calcium and high temperature. when applied as viscosity thinning agent, it can be applied in fresh water, sea water and saturated brine mud as well as ultra-deep well mud. 

Features:

Brownish black with molecular weight at 20000-100000.Good water solubility; soluble in water with any hardness; can be configured into water solution with concentration from 1-50%;The Ferrum and chrome contained nearly don’t ionize;PH: about 3.0;With better resistance to salt, calcium and high temperature compared with Tannin;Have good effect on the viscosity-reducing of drilling mud. Application: it is applied as the thinner for drilling mud in geology drilling and petroleum drilling; effectively improve the mobility of mud. Due to its resistance to high temperature, it is also applied as the treatment agent for the mud in deep well.