The present disclosure relates to a super absorbent polymer, and a preparation method thereof. More specifically, it relates to a super absorbent polymer prepared such that agglomeration between pulverized particles is suppressed, and drying efficiency and uniformity of particle size distribution are improved by including a carboxylic acid-based additive having a specific structure and hydrophobic particles before drying the hydrogel polymer, and a preparation method thereof.

Provided is a porous glass filter obtained by heat-treating alkali borosilicate glass containing an alkali oxide (R.sub.2O), boron trioxide (B.sub.2O.sub.3), and silica (SiO.sub.2) as a composition at a glass transition temperature to phase-separate the alkali borosilicate glass into an alkali boro (R.sub.2O—B.sub.2O.sub.3) phase and silica (SiO.sub.2) phase, and obtained by thermal treatment or acid treatment to dissolve an alkali boro (R.sub.2O—B.sub.2O.sub.3) phase. The manufacturing method includes: a glass forming step of melting and cooling alkali oxide (R.sub.2O), boron trioxide (B.sub.2O.sub.3), and silica (SiO.sub.2) to manufacture an alkali borosilicate glass; a phase separation step of heat-treating the alkali borosilicate glass at a glass transition temperature to phase separation of the alkali borosilicate glass into an alkali borosilicate (R.sub.2O—B.sub.2O.sub.3) phase and a silica (SiO.sub.2) phase; a micropore generation step of generating micropores by the dissolving alkali boro (R.sub.2O—B.sub.2O.sub.3) phase by heat-treating or acid-treating the phase-separated alkali borosilicate glass.

The present invention relates to a superabsorbent polymer showing a low degree of decrease in absorption capacity, and a preparation method thereof. Specifically, the present invention provides a superabsorbent polymer having an excellent rewetting prevention ability such that moisture hardly leaks out under pressure even after a certain time, and a preparation method thereof, by preparing an acrylic resin with a high molecular weight main chain that is evenly cross-linked for maintaining high gel strength by minimizing an amount of an initiator with respect to a monomer.

The present invention relates to superabsorbent polymer and a method for preparing the same. More specifically, the present invention relates to superabsorbent polymer with improved properties, comprising a dual cross-linking structure derived from alkyleneglycol multifunctional (meth)acrylate and modified nanoclay, and a method for preparing the same. According to the present invention, the modified nanoclay and alkyleneglycol multifunctional (meth)acrylate are used as internal crosslinking agents in the process of preparing superabsorbent polymer, thus contributing to improvement in the cross-linking degree and the properties of superabsorbent polymer.

The present invention relates to a manufacturing method of a super absorbent polymer. The manufacturing method of a super absorbent polymer according to the present invention may include: carrying out a thermal polymerization or a photopolymerization of a monomer composition including a water-soluble ethylene-based unsaturated monomer and a polymerization initiator to form a hydrogel polymer; drying the hydrogel polymer; pulverizing the dried polymer; classifying the pulverized polymer into a fine powder having a particle diameter of less than 150 μm and a polymer having a particle diameter of 150 to 850 μm according to the particle diameter; performing reassembly by mixing and wetting the fine powder with 5 to 30° C. water in a content of 50 to 200 parts by weight with respect to 100 parts by weight of the fine powder having a particle size of 150 μm or less, to form a fine powder reassembly; and mixing the polymer having a particle diameter of 150 to 850 μm with the fine powder reassembly, followed by surface cross-linking, and may obtain a super absorbent polymer having a high fine aggregation strength.

The present inventive concept relates to a heavy metal adsorbent, and more particularly, to an eco-friendly adsorbent including a biopolymer and being capable of simultaneously adsorbing and recovering lead and copper, and a method of preparing the same. According to the present inventive concept, since the present adsorbent exhibits a property of being insoluble in water due to the ester bond through the esterification reaction between xanthan gum which is one of the biopolymers, and citric acid, it solves the problem that recovery was impossible due to the water solubility of existing biopolymers; lead and copper can be effectively adsorbed and recovered in an aqueous solution; and the biopolymer and citric acid used in the adsorbent are bio-derived and biodegradable and therefore have eco-friendly advantages over existing adsorbents.

The invention relates to a process for producing water-absorbing polymer particles with high free swell rate, comprising the steps of polymerization, drying, grinding, classification and thermal surface postcrosslinking, remoisturization and drying again.

Filter media for treating contaminated water is produced from aluminum-based water treatment residuals (Al-WTR) commonly produced as a byproduct of water treatment plants. By processing the residuals into small granules, a superior green sorbent product is obtained with the functionality to adsorb contaminants, such as metals and certain nutrients in water. Biopolymers can be incorporated into the filter media to further enhance functionality and hydraulic characters.

The present invention relates to a superabsorbent polymer and a method for producing the same. The superabsorbent polymer includes a core layer polymerized with monomers having carboxylic group, a first shell layer formed from a surface crosslinking agent, and a second shell layer formed from zingiberaceae extracts. By a surface modification on the first shell layer performed from a specific amount of the zingiberaceae extracts, the superabsorbent polymer produced according to the method for producing the same has a good antimicrobial property and deodorizing effects, and retains an original absorbent property.

A method of manufacturing absorbent material from bird feather includes the steps of selecting an appropriate feather material, perform a pre-treatment for cleaning and sterilizing the feather material, crushing the feather material into a crushed material of a size of 0.1 um˜1 cm, and performing a modification treatment of the crushed material by surface activation to produce an absorbent material. After the crushed feather material is processed by a modification treatment, the material may be used to manufacture an absorbent material having both deodoring and filtering functions for adsorbing metal ions, organic solvents, grease or volatile gases.