Preparation of a Concentrated Coal Water Slurry Dispersant Incorporating Sulfomethylated Alkali Lignin as a Raw Material

Abstract

Abstract-Dispersants in coal water slurry have received considerable attention over the years with regards to their use in enhancing the properties of CWS. This paper focuses on the preparation of the low-cost, high-performance CWS dispersant. The novel concentrated coal water slurry dispersant was prepared by reacting the sulfomethylated alkali lignin with sulphonated acetone-formaldehyde polycondensate, and the effect of various factors on the dispersion ability was investigated. The results showed that when the H 2 O 2 dosage was 5g, when the molar ratio of CH 2 O to Na 2 SO 3 was 3.4, and when the Na 2 SO 3 dosage was 40%, the apparent viscosity of CWS could reach 1074 mPa•s.