Abstract: A sorbent for capture of formaldehyde, including a hydrophilic amorphous precipitated silica material having a BET surface area of at least 200 m2/g, and an organic compound in the form of polyethylenimine (PE I) bound to a surface of the amorphous precipitated silica material.

Abstract: A formulation for forming an ink-receptive coating on a substrate includes more than 1 percent by weight (wt. %) of dry matter of a mesoporous material including particles of precipitated silica, wherein the mesoporous material is incorporated in the formulation in the form of a paste having a water content within a range of 60-95 wt. %, wherein the paste has been obtained by washing and dewatering of a slurry formed by mixing alkali silicate with a salt solution so that coagulation occurs.

Abstract: A sorbent for capture of ethylene gas includes an amorphous precipitated silica material having a BET surface area of at least 200 m2/g and an organic compound in the form of an amine, an imine or an amide bound to a surface of the amorphous precipitated silica material. The organic compound is configured for chemisorption of ethylene. An ethylene gas filtration system for a refrigerator includes an ethylene gas filter including the sorbent and a fan. The ethylene gas filter is mounted in conjunction with the fan such that gas is actively circulated through the ethylene gas filter by means of the fan. The organic compound may be triisopropanolamine, polyethylenimine or polyamide.

Abstract: A micro-porous material having agglomerates of precipitated silica, according to the formula MeOx.HiSiO2, The agglomerates are composed of porous particles, and the agglomerates exhibit a size in the range 0.5-500 ?m. A gas filter having the micro-porous material, and a method of filtering air through the micro-porous material.

Abstract: A method of producing a material including agglomerated particles of precipitated silica, including preparing a solution of at least two metal salts (Me), wherein the metal ions are divalent or polyvalent. A solution of alkali metal (M) silicate having a molar ratio SiO2/M2O of 1-4 is prepared. The solutions are mixed and the mixture stirred, allowing a coagulum to immediately form. The coagulum is rinsed, collected, dewatered, impregnated and processed to provide a material having a dry matter content of >75%, preferably >97%. A material obtainable by the process is also provided.

Abstract: A method of producing a material including agglomerated particles of precipitated silica, including preparing a solution of at least two metal salts (Me), wherein the metal ions are divalent or polyvalent. A solution of alkali metal (M) silicate having a molar ratio SiO2/M2O of 1-4 is prepared. The solutions are mixed and the mixture stirred, allowing a coagulum to immediately form. The coagulum is rinsed, collected, dewatered, impregnated and processed to provide a material having a dry matter content of >75%, preferably >97%. A material obtainable by the process is also provided.