Sulphonated naphthalene formaldehyde (SNF) is commonly used as a dispersant in the construction industry, particularly in the production of concrete. Some of the specific applications of SNF include: Overall, SNF is a versatile additive that can be used in a wide range of concrete applications to improve its performance and properties. Regenerate response
Sulphonated naphthalene formaldehyde, also known as SNF, is a type of synthetic polymer that is commonly used as a dispersant in the construction industry. It is derived from naphthalene and formaldehyde, and it is sulfonated to improve its solubility in water. SNF is a versatile additive that is used to improve the flow and workability […]
Among methods proposed for separating lignosulfonate from spent pulping liquor, ultrafiltration seems to be industrially applicable. Kraft lignin may be extracted by means of technology from black liquor. Among the methods proposed to increase the degree of sulfonation of lignin, sulfonation with sodium sulfite was relatively easy to implement, but sulfomethylation was more industrially attractive […]
Ion-exchange resins Ion-exchange resins are high surface area active materials on an inert base that allow for the exchange of similarly charged ions. Because lignin and lignosulfonates have metal-complexing capabilities, research has been done to increase their use for ion exchange. To produce sulfonated lignin with an ion-exchange capacity similar to that of commercial ion-exchange […]
Antioxidant and pharmacological effects Antioxidants are materials that prevent the oxidation reaction of oxygen-containing reactive free radicals.They are important in health/cosmetic applications to prevent the destruction of healthy cells in the human body, and in materials science applications to prevent the degradation of the materials used as (for example) composites. Lignin and lignosulfonates have been […]
Metal adsorbents Metal adsorbents or complexing agents are materials that have the ability to bind with metals to form metal complexes. The carboxylate and sulfonate groups of lignosulfonates can act as potential complexation aids for metals.This occurs through cation-exchange mechanisms, in which the salt (e.g., sodium salt) of the functional group of lignosulfonates exchanges irreversibly […]