Kuraray Co., Ltd.

Kuraray Chemical Co., Ltd.

Tanaka Kikinzoku Kogyo K.k.

Kurarayco., Ltd.

Takayuki Yamada

Mitsunori Hitomi

Mitsunori Nishita

Takayuki Yoshikawa

Takaharu Yamamoto

Keita Takahashi

Tetsuya Hanamoto

Hiroaki Kitatomi

Akira Miyake

Hiroe Yoshinobu

Yoshifumi Egawa

Susumu Abe

Shizuo Ishimura

Takanori Kitamura

Yoshichika Sabae

The present invention relates to an activated carbon, having a pore volume (A) of 0.3 to 0.7 mL/g at a pore diameter of 6.5 to 50 nm as determined by mercury intrusion porosimetry, a pore volume (B) of 0.23 mL/g or less at a pore diameter of 750 to 4,000 nm as determined by mercury intrusion porosimetry, and a pore volume ratio (A)/(B) of 1.7 or higher.

Activated carbon and method for producing same

To provide an activated carbon molded article which can satisfactorily adsorb an evaporated fuel emitted from an automobile and can achieve low evaporated fuel emission performance during the long-time parking of an automobile. An activated carbon molded article having a specific surface area per volume, which is calculated from a specific surface area determined by the BET multipoint method and a packing density determined in accordance with JIS K 1474, of 290 to 520 m/mL, and also having an outer surface area per volume of 1.4 m/L or more.

Activated carbon molded article

Disclosed herein are activated carbons having a high decolorization performance in a liquid phase, and methods for producing the activated carbons. Disclosed herein are also activated carbons having a high decolorization performance in liquid phases having relatively high viscosities, such as sugar liquids, and methods for producing the activated carbons. Activated carbons disclosed herein include activated carbons having a pore volume, which is calculated by measuring a nitrogen adsorption isotherm at 77 K and performing the MP method analysis, of 0.58 mL/g or less, and having a pore volume at a pore diameter of 10 to 10000 nm measured by the mercury intrusion method of 0.35 mL/g or more.

Activated carbon and production method thereof

Disclosed herein are activated carbons having high decolorization performance in liquid phases, especially in liquid phases having relatively high viscosities, such as sugar liquids, and methods for producing the activated carbons. Activated carbons disclosed herein include activated carbons having a pore volume at a pore diameter of 10 to 10000 nm measured by the mercury intrusion method of 0.8 to 1.9 mL/g, and having a pore volume at a pore diameter of 300 to 1000 nm measured by the mercury intrusion method of 0.19 mL/g or more.

Adsorption and desorption molding for vehicle canisters

The present invention relates to a porous carbon material having a nitrogen content of 0.5 to 2.0 mass % and an iron content of at least 400 mg/kg-porous carbon material or more, and also having an electrical conductivity of 10 S/cm or more as determined by powder resistance measurement.

Porous carbon material, method for producing same and use of same

One aspect of the present invention relates to a porous carbon material having a nitrogen content of 0.6 to 2.0% by mass, a G band half-value width of 51 to 60 cmand an R value of 1.08 to 1.40 measured in a Raman spectrum using a laser having a wavelength of 532 nm, and iodine adsorption performance of 1000 to 1500 mg/g.

Porous carbon material, method for producing same, and use of same

Adsorption-desorption material for vehicle canisters

One aspect of the present invention relates to an adsorption filter containing an activated carbon and a fibrous binder. The adsorption filter has a density of 0.400 g/ml or more, and a pore volume at a pore diameter of 1 to 20 &#x3bc;m is 0.60 ml/g or less as measured by mercury intrusion porosimetry.

Adsorption filter

The present invention relates to an activated carbon having an electric conductivity of 3.5 S/cm or more obtained by powder resistance measurement under a load of 12 kN and an oxygen content of 3.0% by mass or more, and a metal-carrying activated carbon using the same, and the like.

Activated carbon, metal-carrying activated carbon using same and hydrogenation reaction catalyst

A process for producing an adsorbent comprising activated carbon, wherein the process comprises a molding step of molding an adsorbent through a plurality of stages, and wherein the molding step comprises molding in a final stage performed by tableting.

Process for producing adsorbent including activated carbon

In an activated carbon for adsorbing a noble metal from an aqueous solution containing the noble metal, the difference (absolute value) between a zeta-potential in a 10 mmol/L aqueous solution of sodium tetraborate and a zeta-potential in a 0.01 mmol/L aqueous solution of sodium tetraborate is adjusted to not more than 18 mV and the pore volume of pores with a pore radius of not more than 1 nm is adjusted to 150 to 500 mm/g. The activated carbon of the present invention may have a carbohydrate solution decolorizing performance of not less than 30%. The aqueous solution containing the noble metal may be a plating wastewater. According to the present invention, a noble metal can efficiently be adsorbed (or recovered) from a solution containing the noble metal.

Activated carbon for noble metal adsorption, noble metal adsorption filter, and method for recovering noble metals

An activated carbon having a high catalytic activity as an oxidation catalyst or a decomposition catalyst, and use therefor are provided. The activated carbon has (a) an oxygen content in a range from 1.40 to 4.30% by mass, (b) a nitrogen content in a range from 0.90 to 2.30% by mass, (c) a sulfur content in a range from 0.50 to 1.20% by mass, and (d) a hydrogen content in a range from 0.40 to 0.65% by mass. The activated carbon may have at least one characteristic of (e) an amount of an acidic surface functional group of 0.10 to 0.36 meq/g, (f) an amount of a basic surface functional group of 0.50 to 1.30 meq/g, and (g) a benzene adsorption capacity of 25 to 50%. The activated carbon catalyzes an oxidation reaction of N-(phosphonomethyl)iminodiacetic acid with a peroxide (e.g., hydrogen peroxide) and achieves an efficient production of N-(phosphonomethyl)glycine even after repetitive use. The activated carbon also efficiently decomposes a chloramine.

Growing community of inventors

Okayama, Japan

Takayuki Yamada