A porous sorbent ceramic product includes a three-dimensional structure having an electrically conductive ceramic material, wherein the conductive ceramic material has an open cell structure with a plurality of intra-material pores, a sorbent additive primarily present in the intra-material pores of the conductive ceramic material for adsorption of a gas, and at least two electrodes in electrical communication with the conductive ceramic material.

The present invention relates to a method for modifying the crystalline inorganic framework of an adsorbent with coatings to provide rate selectivity for one gas over others is described. The method described herein narrows the effective pore size of crystalline porous solids with pores less than about 5 Å for rate selective separations. This method of the invention comprises treating the hydrated or partially hydrated zeolite with a silicone derived binding agent followed by subsequent heat treatment. The additive content and treatment are adjusted to match effective pore size to specific separations. The superior adsorbent has the added convenience of bead forming simultaneously with pore modification as well as having the treatment result in the yielding of high crush strength products.

The present invention relates to an improved diatomaceous earth composition containing salt water. The diatomaceous earth composition according to the present invention comprises an agglomerated mixture of calcined diatomaceous earth particles, water and at least one inorganic salt, wherein the mass ratio of the calcined diatomaceous earth particles and water is in the range of 1:1.0 to 1:2.0, and wherein the content of the at least one inorganic salt is equal to or more than 0.25 parts by mass based on 100 parts by mass of water. In a further aspect, the present invention relates to a method for producing the diatomaceous earth composition according to the present invention. In another aspect, the present invention relates to the use of the diatomaceous earth composition according to the present invention as an agent for precoat filtration or dynamic body feed filtration in biopharmaceutical applications.

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.

A refractory filter suitable for filtering molten metal, such as steel, and a method and powdered composition for producing said filter. The filter comprises refractory material, said refractory material comprising: 60-90 wt % alumina; 8-30 wt % zirconia; and 3-20 wt % magnesia. The powdered composition comprises: 60-90 wt % alumina; 8-30 wt % zirconia; and 3-20 wt % magnesia, wherein the powdered composition comprises less than 12.5 wt % reactive alumina, calcined alumina or a mixture thereof, and wherein the remainder of the alumina is tabular alumina. The method comprises: providing a powdered composition in accordance with the invention; forming a filter precursor from the powdered composition and a liquid component; and firing the filter precursor to form a refractory filter.

A filter includes a porous molded article, which is a sintered material of mixed powder containing activated carbon powder and thermoplastic resin powder. When water having a specific electrical resistance value of 18 MΩ.Math.cm or greater is caused to pass through the filter at a space velocity of 1200 hr.sup.−1, a specific electrical resistance value of the water after being caused to pass through the filter is 13 MΩ.Math.cm or greater. To provide a filter capable of efficiently removing metal ions in a treatment liquid and capable of easily obtaining a solution having an extremely low metal ion content.

An adsorbent for phosphoric acid-based anionic substances, that contains foamed glass, and that has a Ca2p concentration of 7.5 atom % or more or a Na1s concentration of 5.0 atom % or less at the surface thereof as measured by XPS analysis, and a half-width of Si2p peak of 2.4 eV or more. The adsorbent can also have a specific surface area of 45 m.sup.2/g or more or a pore volume of 2.5 cm.sup.3/g or more as measured by mercury intrusion.

A method for preparing a modified sodium fluoride adsorbent includes the following steps: S1. producing spherical particles of NiCl.sub.12.6H.sub.2O and porous NaF with a mass ratio of 1:3.0-3.5; S2. sintering the spherical particles in a vacuum environment at a temperature of 120-130° C. for 10-40 hours and at a temperature of 280-300° C. for 10-40 hours, respectively, to form an adsorbent intermediate with a NiCl.sub.2—NaF framework, wherein, a vacuum degree is less than or equal to 500 pa; and S3. treating the adsorbent intermediate by fluorine-nitrogen mixtures with high purity to obtain the novel sodium fluoride adsorbent having NiCl.sub.2—NaF framework. The modified sodium fluoride adsorbent can effectively separate chlorine trifluoride and hydrogen fluoride molecules, and the optimal adsorption rate of hydrogen fluoride is upgraded to more than 98%. While, the optimal adsorption rate of chlorine trifluoride is lowered down to around 3%.

A method of forming an activated carbon sorbent from a seagrass. The method involves treating a seagrass with a base solution to form an intermediate solid, drying the intermediate solid to form a precursor, and pyrolyzing the precursor at 600 to 1000° C. to form the activated carbon sorbent. Preferably the seagrass is Halodule uninervis. The activated carbon sorbent is used in a method of removing an organic pollutant from a contaminated water. Preferred organic pollutants removed are phenols, specifically 2,4-dimethylphenol and 2,4-dichlorophenol.

A SO.sub.2 adsorption material, a preparation method therefor and an application thereof, and a method for removing SO.sub.2 from flue gas containing SO.sub.2 are provided. The SO.sub.2 adsorption material contains a carbonized metal organic framework material and a sulfite loaded on the carbonized metal organic framework material, and the carbonized metal organic framework material is a carbonized material obtained by carbonizing a metal organic framework material. On the basis of the total weight of the SO.sub.2 adsorption material, the loading amount of sulfite is not higher than 10 wt %. The SO.sub.2 adsorption material has a relatively high SO.sub.2 adsorption capacity, and may be desorbed and regenerated by heating, and the adsorption capacity still remains at a relatively high level after multiple cycles of adsorption-desorption.