The present disclosure relates to a preparation method of a super absorbent polymer. More specifically, it relates to a preparation method of a super absorbent polymer with improved permeability and anti-caking efficiency while having a high absorption rate by adding an additive having a specific structure to the hydrogel polymer polymerized in the presence of an encapsulated foaming agent, followed by coarse pulverization.

The present disclosure relates to a method for preparing a super absorbent polymer. More specifically, it relates to a method for preparing a super absorbent polymer capable of preparing a super absorbent polymer in which the residual monomer content and the extractable content are simultaneously reduced by adding a reducing agent capable of a redox reaction with a thermal polymerization initiator before drying the hydrogel polymer.

An absorbent compound and method of making the same, where the absorbent compound includes an amine oxide that comprises about 30% to about 55% of the absorbent compound and a polymer that comprises about 30% to about 55% of the absorbent compound.

Cross-linked polyvinyl polymers comprising charged groups and methods of making are disclosed. The polymers are effective and durable adsorbent of dyes from aqueous solutions. Also, a method of removal of dyes from contaminated water is disclosed.

Devices and methods for provided both an antimicrobial vapor such as hydrogen peroxide and/or peracetic acid and water vapor in an enclosed or partially enclosed space are described. The device and method provided is for the reduction or elimination of microbes from air and surfaces in contact with air within an enclosed or partially enclosed space using hydrogen peroxide or peracetic acid in the vapor phase and also provide for humidity from water vapor. The device and method are directed towards a release of an antimicrobial vapor and water vapor through a permeable container/barrier containing a matrix into which water and an antimicrobial vapor producing material are absorbed.

[Problem] To provide a particulate water-absorbing agent that can significantly reduce re-wet even when pressure is applied to the particulate water-absorbing agent from the outside when the particulate water-absorbing agent is in a swollen state.

[Solution] A particulate water-absorbing agent comprising a surface-crosslinked polyacrylic acid (salt)-based water-absorbing resin as a main component and satisfying the following expression (1).

AAP(2.06 kPa)+RCAP(2.06 kPa)≥0.58×CRC+55.6  (1),

wherein AAP (2.06 kPa) represents absorption capacity (g/g) under a pressure of 2.06 kPa, RCAP (2.06 kPa) represents retention capacity against pressure after swelling (g/g), and CRC represents absorption capacity without pressure (g/g).

Crosslinked polymers made up of polymerized units of cyclic diaminoalkane, aldehyde and bisphenol-S or melamine. A method for removing heavy metals, such as Pb(II) from an aqueous solution or an industrial wastewater sample with these crosslinked polymers is introduced. A process of synthesizing the crosslinked polymers is also described.

A column for removal of a component from a fluid is disclosed. The column has a compartment with a cross sectional area. The compartment contains beads having a diameter. A ligand selected to bind to the component is coupled to the beads. The cross-sectional area and bead diameter are selected to maintain a flow velocity of the fluid within the compartment below a first threshold, thereby reducing leaching of the ligand into the fluid. Also described herein is an adsorbent comprising a ligand that is attached to a substrate by an amine bond, wherein the ligand is resistant to dissociation from the substrate.

The present invention relates to a method for preparing a macromolecular composition comprising indene-derivatives. The invention also relates to the macromolecular compositions per se, and to methods of using the macromolecular compositions. The macromolecular compositions are useful for undergoing subsequent reactions with small molecules.

A method for separating N.sub.2 from a hydrocarbon gas mixture containing N.sub.2 comprising the steps of: i) providing a bed of adsorbent selective for N.sub.2; (ii) passing the hydrocarbon gas mixture through the bed of adsorbent to at least partially remove N.sub.2 from the gas mixture to produce: (a) N.sub.2-loaded adsorbent and (b) N.sub.2-depleted hydrocarbon gas mixture; iii) recovering the N.sub.2-depleted hydrocarbon gas mixture; iv) regenerating the N.sub.2-loaded adsorbent by at least partially removing N.sub.2 from the adsorbent; and v) sequentially repeating steps (ii) and (iii) using regenerated adsorbent from step (iv); wherein the adsorbent comprises a pyrolized sulfonated macroporous ion exchange resin.