| 摘要 |
FIELD: chemistry.SUBSTANCE: invention relates to graft copolymer from lignin, which can be used as additive to drilling mud. Method of obtaining graft copolymer from lignin includes reaction of lignocelluloses material with acryl compound at from 60°C to 100°C in nitrogen atmosphere in presence of non-oxidising strong organic acid as catalyst. Reaction mixture is separated with zinc sulphate solution to obtain solid phase, containing mainly lignocelluloses materials, and liquid phase, containing graft copolymer from lignin and acryl compound that did not react. Liquid phase is subjected to evaporation to obtain graft copolymer from lignin. Lignocellulose materials are obtained from wastes of oil palm processing. Application of obtained graft copolymer from lignin in drilling mud as gel-forming and thickening agent and drilling mud, including from 0.3% to 0.7% of said copolymer from lignin.EFFECT: invention ensures obtaining effective, economical, environmentally friendly gel-forming and thickening agent for drilling mud.8 cl, 3 tbl, 4 ex |
