A chromatography system comprising at least two chromatography units (3) connected in parallel, wherein said at least two chromatography units (3) each comprises a convection-based chromatography material, wherein an initial difference in back pressure provided from the different chromatography units (3) is compensated dynamically during run of the system due to a change of chromatography unit properties provided during the chromatography process.

The present invention provides a bionic fiber adsorptive material with multi-adsorption sites and a preparation method and use thereof, and the material is rich in multi-adsorption sites (N, O and S). The material is obtained by blending three polyethyleneimine polymers modified by multifunctional groups respectively with a carboxylated nanocellulose and graphene oxide, then adopting a coaxial spinning method based on a principle of imitating spider spinning, and then adopting a post-crosslinking technology. The material has a multilayer structure with the nanocellulose as a skeleton, the graphene oxide as an outer layer, and the three polyethyleneimine polymers modified by the multifunctional groups respectively as an inner layer, and a connection among the layers is a chemical bond connection. Densities of N, O and S adsorption sites of the material according to the present invention are all higher than 5 mmol/g.

The invention provides a biomass-based hyperbranched adsorption material with multi-adsorption sites to multiple heavy metal ions and a preparation method thereof. The biomass-based hyperbranched adsorption material with multi-adsorption sites to multiple heavy metal ions is prepared by one-step instant-crosslinking method using a biomass raw material as matrix and a hyperbranched polymer containing chelating atoms of N, O, and S as functional reagent, wherein the hyperbranched polymer has two or more different adsorption sites (containing elements such as N, S, O, etc.) to heavy metal ions.

Provided is a method for easily and inexpensively separating a rare earth element contained in an aqueous solution.

An absorber 10 contains water-absorbent resin particles 10a and a fibrous substance, a medium particle diameter of the water-absorbent resin particles 10a is 250 to 600 μm, the water-absorbent resin particles 10a contain small-diameter particles having a particle diameter of 180 μm or less, and a falloff rate of a mixture of the small-diameter particles and the fibrous substance when the mixture is subjected to shaking treatment for 10 minutes is 20% by mass or less.

The present invention relates to a method and apparatus for providing and/or receiving audible sound. In particular, the invention relates to apparatus, such as a micro speaker, which includes an active region which comprises a particulate adsorbent material comprising i) microporous organic polymer (MOP) material, and/or ii) metal organic framework (MOF) material treated with a hydrophobic coating or a membrane. The particulate adsorbent material is either in the form of loose or semi-loose granules, or it is supported by or impregnated into a woven, knitted or non-woven felt material. The apparatus of the present invention is suitable for use in an electronic device, for example a mobile or portable electronic device, to provide improved audible sound.

A process for manufacturing particles of water-absorbing material is provided. The process includes providing a powder bed composed of an absorptive powder comprising a water-absorbing polysaccharide onto a surface; releasing an aqueous solution from a solution dispenser so as to contact the powder bed, thereby forming a solution-impregnated humid material; letting the solution-impregnated humid material agglomerate in substantially shear-less conditions to form an agglomerated humid material, the solution-impregnated humid material being supported by the surface; and drying the agglomerated humid material, thereby forming the particles.

A liquid absorber includes a plurality of small chips. Individual ones of the small chips include a first substrate containing fibers, a second substrate containing fibers, and an absorbent resin supported between the first substrate and the second substrate. The first substrate contains an ion scavenger.

The present disclosure is directed to methods and systems of purifying solvents. The purified solvents can be used for cleaning a semiconductor substrate in a multistep semiconductor manufacturing process.

Disclosed are adsorbent particles each containing: a carrier particle containing an organic polymer; an amino group-containing polymer adhered to a surface of the carrier particle and including a constituent unit having an amino group; and a diglycolic acid residue bonded to the amino group of the amino group-containing polymer.