sodium lignosulphonate Oil field grade CAS 8061-51-6 industrial grade

Appearance	Yellow Brown powder	PH Value	7-9
Dry matter	≥93%	Moisture	≤7％
Water insoluble matter	≤2.5%	Lignosulphonate	≥55%
Total reducing matter	≤4%	Package	25kg/bag

Sodium Lignosulphonate--Oil fieldsodium lignosulphonate has special molecular structure and is widely used in oil field chemicals. It is often used as surfactant for tertiary oil recovery, drilling fluid treatment agent and water blocking agent. The modified lignosulfonate was modified by introducing lipophilic group into the lignosulfonate molecule. The modified lignosulfonate had higher surface and interfacial activity, and the combination with petroleum sulfonate could produce ultra-low interfacial tension. The results showed that the higher the content of lignin, the higher the concentration of surfactant, and the shorter the time needed to reach the minimum interfacial tension. When the concentration of NaOH is high, the interfacial tension increases. The function of modified lignosulfonate in the compound system is discussed, which provides a theoretical basis for the application of lignosulfonate in tertiary oil recovery and has practical significance.

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