...). Sodium lignosulfonates (SLS) fall within the PLONOR list of chemicals but have poor inhibition efficiency towards calcite scaling. When modified by a cost-efficient, and environmentally-friendly method, the lignosulfonates showcased remarkable improvement towards calcite scale inhibition. The modified...

... Abstract The retardation of class H Portland cement using lignosulfonates was investigated in the temperature range between 54°C and 153°C. Lignosulfonates with varying extent of modification was used in the study, and the optimum retarder dosage and temperature range to achieve desired...

... fluid viscosity polymer concentration filter cake gel breaker characterization residue Compound filtrate USA breaker permeability lignosulfonate polysuccinimide spe 164116 Introduction Permeability damage caused by formation invasion and filter cake deposition by polymers used...

... FLA enhance its affinity for the surface of cement and thus render it more robust against the negative impact from other admixtures. Second, compatibility between a Na + lignosulfonate retarder and the CaATBS-co-NNDMA FLA was investigated. Here, surprisingly a dual synergistic effect was found. Na...

... Abstract Equilibria and kinetics are two basic ingredients for the proper understanding of adsorption and desorption processes between surfactants and rocks. The adsorption and desorption of calcium lignosulfonate (CLS), commonly used as a sacrificial agent in surfactant-based EOR processes...

... of lignosulfonate, kraft lignin and a pentose sugar. Laboratory studies have shown that the performance of this product exceeds that of conventional set retarders with regard to maintaining the stability of the foamed cement system. This set retarder can also function in non-foamed applications. Several wells have...

... Abstract A synthetic cement retarder which provides excellent retardation and compressive strength development has been synthesized. The response properties and temperature ranges of the synthetic retarder far exceed those of commonly used retarders such as lignosulfonates. The chemical nature...

... concentration of chrome lignosulfonate in a water-base mud containing 28 ppb Wyoming bentonite. Poly(lignin-g-(1-amidoethylene)) is formed along with poly(1-amidoethylene) in a graft copolymerization reaction of 2-propenamide on Kraft pine lignin contained in 1, 4-dioxacyclohexane. Formation of graft copolymer...