Patents Assigned to Kuraray Chemical Co., Ltd.
-
Publication number: 20170144896Abstract: A water filter cartridge is reduced in fluctuation in filtration flow rate or in filtration performance due to activated carbon, and can exhibit stable performance even at the time of large scale production; and a water purifier is equipped with the water filter cartridge. A water filter cartridge having particulate activated carbon filled in a case for accommodating a filtering material in which the ratio of the total mass of particulate activated carbon having a particle size of 0.3 to 4.0 mm relative to the total mass of activated carbon is 97% by mass or more, and, in a particle size distribution which represents the relationship of the mass ratio of activated carbon relative to the particle size of activated carbon, a peak at which the mass ratio is 31% by mass or more does not appear in a particle size range of from 0.3 to 4.0 mm.Type: ApplicationFiled: June 5, 2015Publication date: May 25, 2017Applicants: Mitsubishi Rayon Co., Ltd., Kuraray Chemical Co., Ltd.Inventors: Hatsumi TAKEDA, Masanori ITAKURA, Masanori ITO, Hiroe YOSHINOBU
-
Publication number: 20170125811Abstract: The object of the present invention is to provide a carbonaceous material which is obtainable from plant-derived char and has a decreased specific surface area. Further, the object of the present invention is to provide a non-aqueous electrolyte secondary battery having excellent dedoping capacity, non-dedoping capacity, and charge-discharge efficiency. The object can be solved by a carbonaceous material for non-aqueous electrolyte secondary batteries characterized in that the carbonaceous material is obtained by heat-treating plant-derived char which is demineralized in gas-phase, and carbon precursor or volatile organic compound under a non-oxidizing gas atmosphere; and a specific surface area determined by a BET method is 10 m2/g or less.Type: ApplicationFiled: January 18, 2017Publication date: May 4, 2017Applicants: KUREHA CORPORATION, KURARAY CO., LTD., KURARAY CHEMICAL CO., LTD.Inventors: Makoto IMAJI, Kenta AOKI, Yasuhiro TADA, Naohiro SONOBE, Junichi ARIMA, Kenichi KOYAKUMARU, Hideharu IWASAKI, Kiyoto OTSUKA, Jiro MASUKO, Hajime KOMATSU, Shinya TAGO
-
Publication number: 20170047173Abstract: A porous carbon material for electrodes of energy storage devices comprising: a porous carbon material; 0.5 to 5 parts by mass of an insulating material having a boiling point of 150° C. or more based on 100 parts by mass of the porous carbon material; and 0.25 to 15 parts by mass of a conductive additive based on 100 parts by mass of the insulating material, wherein the insulating material and the conductive additive are carried on the porous carbon material in combination, and the porous carbon material has a BET specific surface area of 1300 to 2050 m2/g.Type: ApplicationFiled: April 21, 2015Publication date: February 16, 2017Applicant: KURARAY CHEMICAL CO., LTD.Inventors: Yumika NISHITA, Shushi NISHIMURA, Yoshifumi EGAWA, Kiyoto OTSUKA
-
Patent number: 9508494Abstract: The object of the present invention is to provide a manufacturing method of carbonaceous material for a negative electrode of lithium ion capacitors, wherein the carbonaceous material is obtained from plant-derived char as a source, potassium and iron are sufficiently removed, and an average particle diameter thereof is small; and a carbonaceous material for a negative electrode of lithium ion capacitors. The object can be solved by a method for manufacturing a carbonaceous material having an average diameter of 3 to 30 ?m, for a negative electrode of lithium ion capacitors comprising the steps of: (1) heating plant-derived char having an average particle diameter of 100 to 10000 ?m at 500° C. to 1250° C. under an inert gas atmosphere containing a halogen compound to demineralize in a gas-phase, (2) pulverizing a carbon precursor obtained by the demineralization in a gas-phase, (3) calcining the pulverized carbon precursor at less than 1100° C. under a non-oxidizing gas atmosphere.Type: GrantFiled: August 30, 2013Date of Patent: November 29, 2016Assignees: KUREHA CORPORATION, KURARAY CO., LTD., KURARAY CHEMICAL CO., LTD.Inventors: Naohiro Sonobe, Yasuhiro Tada, Jiro Masuko, Hajime Komatsu, Junichi Arima, Akimi Ogawa, Kenichi Koyakumaru, Kiyoto Otsuka, Hideharu Iwasaki, Junsang Cho
-
Patent number: 9478805Abstract: Provided is a manufacturing method of carbonaceous material for a negative electrode of non-aqueous electrolyte secondary batteries, wherein the carbonaceous material is obtained from plant-derived char as a source, potassium is sufficiently removed, and an average particle diameter thereof is small; and a carbonaceous material for a negative electrode of non-aqueous electrolyte secondary batteries. The method for manufacturing a carbonaceous material having an average particle diameter of 3 to 30 ?m, for a negative electrode of non-aqueous electrolyte secondary batteries includes the steps of: (1) heating plant-derived char having an average particle diameter of 100 to 10000 ?m at 500° C. to 1250° C. under an inert gas atmosphere containing halogen compound to demineralize in a gas-phase, (2) pulverizing a carbon precursor obtained by demineralization in a gas-phase, (3) calcining the pulverized carbon precursor at 1000° C. to 1600° C. under an non-oxidizing gas atmosphere.Type: GrantFiled: August 30, 2013Date of Patent: October 25, 2016Assignees: KUREHA CORPORATION, KURARAY CO., LTD., KURARAY CHEMICAL CO., LTD.Inventors: Yasuhiro Tada, Yasushi Ebihara, Mayu Komatsu, Jiro Masuko, Hajime Komatsu, Naohiro Sonobe, Junichi Arima, Akimi Ogawa, Shinya Tago, Kenichi Koyakumaru, Hideharu Iwasaki, Kiyoto Otsuka
-
Publication number: 20160288087Abstract: Activated carbon for adsorbing a gas phase is provided, wherein the activated carbon has a maximal peak value of 11 ? or larger in a pore size distribution measured using a water vapor adsorption method.Type: ApplicationFiled: March 28, 2016Publication date: October 6, 2016Applicant: Kuraray Chemical Co., Ltd.Inventors: Mitsunori HITOMI, Takayuki Yamada
-
Publication number: 20160268590Abstract: Provided is a less hygroscopic carbonaceous material that is obtained from a plant-derived carbonaceous raw material and that, when used as a negative electrode material for a nonaqueous electrolyte secondary battery, allows the battery to exhibit good battery characteristics. Provided is a carbonaceous material for negative electrodes of nonaqueous electrolyte secondary batteries. This carbonaceous material is a particulate carbonaceous material containing carbonaceous particles. The carbonaceous material has a BET specific surface area of 1 m2/g or more and less than 20 m2/g. Each of the carbonaceous particles of the carbonaceous material has a core and a skin covering the core. The core contains a calcined product of a plant-derived carbonaceous raw material. The skin is made of a material that has higher electron emission ability upon irradiation with an electron beam than a material of the core.Type: ApplicationFiled: October 10, 2014Publication date: September 15, 2016Applicants: KURARAY CO., LTD., KURARAY CHEMICAL CO., LTD., KUREHA CORPORATIONInventors: Akira KOSHIMA, Taketoshi OKUNO, Kenichi KOYAKUMARU, Hideharu IWASAKI, Kenta AOKI, Makoto IMAJI, Yasuhiro TADA, Naohiro SONOBE
-
Patent number: 9368292Abstract: There is provided a carbon material for polarizable electrodes in which a heterocyclic aromatic compound is adsorbed on an activated carbon, wherein the heterocyclic aromatic compound comprises a five- or six-membered ring having two or more nitrogen atoms as ring-forming atoms; a ratio (N/C) of nitrogen atoms to carbon atoms in the heterocyclic aromatic compound is 0.4 or more; 1 to 35 parts by mass of the heterocyclic aromatic compound is adsorbed based on 100 parts by mass of the activated carbon; and the carbon material for polarizable electrodes has a benzene adsorption capacity of 25 to 75% by mass.Type: GrantFiled: November 12, 2013Date of Patent: June 14, 2016Assignee: KURARAY CHEMICAL CO., LTD.Inventors: Akimi Ogawa, Yumika Ninomiya, Shushi Nishimura, Kiyoto Otsuka
-
Patent number: 9359390Abstract: 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.Type: GrantFiled: March 24, 2011Date of Patent: June 7, 2016Assignee: Kuraray Chemical Co., Ltd.Inventors: Mitsunori Hitomi, Takayuki Yoshikawa, Takayuki Yamada
-
Publication number: 20160064735Abstract: The object of the present invention is to provide a manufacturing method of carbonaceous material for a negative electrode of non-aqueous electrolyte secondary batteries, wherein the carbonaceous material is obtained from plant-derived char as a source, potassium is sufficiently removed, and an average particle diameter thereof is small; and a carbonaceous material for a negative electrode of non-aqueous electrolyte secondary batteries. The object can be solved by a method for manufacturing a carbonaceous material having an average particle diameter of 3 to 30 ?m, for a negative electrode of non-aqueous electrolyte secondary batteries comprising the steps of: (1) heating plant-derived char having an average particle diameter of 100 to 10000 ?m at 500° C. to 1250° C. under an inert gas atmosphere containing halogen compound to demineralize in a gas-phase, (2) pulverizing a carbon precursor obtained by demineralization in a gas-phase, (3) calcining the pulverized carbon precursor at 1000° C. to 1600° C.Type: ApplicationFiled: August 30, 2013Publication date: March 3, 2016Applicants: KUREHA CORPORATION, KURARAY CHEMICAL CO., LTD., KURARAY CO., LTD.Inventors: Yasuhiro TADA, Yasushi EBIHARA, Mayu KOMATSU, Jiro MASUKO, Hajime KOMATSU, Naohiro SONOBE, Junichi ARIMA, Akimi OGAWA, Shinya TAGO, Kenichi KOYAKUMARU, Hideharu IWASAKI, Kiyoto OTSUKA
-
Patent number: 9174195Abstract: To obtain adsorbent (10), meltable core which melts away during baking and binder are added to powdery activated carbon having microscopic pore whose size is less than 100 nm together with water and mixed together, then this mixture is molded into hollow cylindrical shape whose outside diameter is 4˜6 mm and baked. Although macroscopic pore whose side is 100 nm or more is formed by the meltable core, proportion of volume of the macroscopic pore to volume of the microscopic pore is adjusted to 65%˜150%. The adsorbent (10) has shape in cross section formed from cylindrical wall (10A) and cross-shaped radial wall (10B), and thickness of each part is within a range of 0.6˜3 mm. The adsorbent (10) of the present invention can satisfy adsorbing/desorbing performance of fuel vapor, flow resistance as a canister and strength of the adsorbent at the same time.Type: GrantFiled: May 29, 2012Date of Patent: November 3, 2015Assignees: MAHLE FILTER SYSTEMS JAPAN CORPORATION, KURARAY CHEMICAL CO., LTD.Inventors: Koji Yamasaki, Mitsunori Hitomi, Takashi Nagamine
-
Publication number: 20150287545Abstract: There is provided a carbon material for polarizable electrodes in which a heterocyclic aromatic compound is adsorbed on an activated carbon, wherein the heterocyclic aromatic compound comprises a five- or six-membered ring having two or more nitrogen atoms as ring-forming atoms; a ratio (N/C) of nitrogen atoms to carbon atoms in the heterocyclic aromatic compound is 0.4 or more; 1 to 35 parts by mass of the heterocyclic aromatic compound is adsorbed based on 100 parts by mass of the activated carbon; and the carbon material for polarizable electrodes has a benzene adsorption capacity of 25 to 75% by mass.Type: ApplicationFiled: November 12, 2013Publication date: October 8, 2015Applicant: KURARAY CHEMICAL CO., LTD.Inventors: Akimi Ogawa, Yumika Ninomiya, Shushi Nishimura, Kiyoto Otsuka
-
Publication number: 20150270072Abstract: The object of the present invention is to provide a manufacturing method of carbonaceous material for a negative electrode of lithium ion capacitors, wherein the carbonaceous material is obtained from plant-derived char as a source, potassium and iron are sufficiently removed, and an average particle diameter thereof is small; and a carbonaceous material for a negative electrode of lithium ion capacitors. The object can be solved by a method for manufacturing a carbonaceous material having an average diameter of 3 to 30 ?m, for a negative electrode of lithium ion capacitors comprising the steps of: (1) heating plant-derived char having an average particle diameter of 100 to 10000 ?m at 500° C. to 1250° C. under an inert gas atmosphere containing a halogen compound to demineralize in a gas-phase, (2) pulverizing a carbon precursor obtained by the demineralization in a gas-phase, (3) calcining the pulverized carbon precursor at less than 1100° C. under a non-oxidizing gas atmosphere.Type: ApplicationFiled: August 30, 2013Publication date: September 24, 2015Applicants: KUREHA CORPORATION, KURARAY CHEMICAL CO., LTD., KURARAY CO., LTD.Inventors: Naohiro Sonobe, Yasuhiro Tada, Jiro Masuko, Hajime Komatsu, Junichi Arima, Akimi Ogawa, Kenichi Koyakumaru, Kiyoto Otsuka, Hideharu Iwasaki, Junsang Cho
-
Publication number: 20150266751Abstract: A water-processing filter having a high dimensional accuracy and an improved filterability (such as a capability to remove turbidity components) is provided. The water-processing filter comprises (A) a hollow cylindrical filter which comprises (a1) a granular activated carbon having a median particle size of 30 to 80 ?m and (a2) a fibrillated fibrous binder. The cylindrical filter (A) has an upstream outer surface having an arithmetical mean deviation of a waviness profile adjusted to not more than 30 ?m and an arithmetical mean deviation of a primary profile adjusted to 35 to 45 ?m. The cylindrical filter (A) may have a downstream inner surface having an arithmetical mean deviation of a waviness profile of not more than 30 ?m and an arithmetical mean deviation of a primary profile of 35 to 45 ?m. The cylindrical filter (A) may have a grounded outer surface.Type: ApplicationFiled: October 17, 2013Publication date: September 24, 2015Applicant: KURARAY CHEMICAL CO., LTD.Inventors: Satoru Arita, Shizuo Ishimura, Tetsuya Hanamoto
-
Publication number: 20150263347Abstract: The object of the present invention is to provide a carbonaceous material which is obtainable from plant-derived char and has a decreased specific surface area. Further, the object of the present invention is to provide a non-aqueous electrolyte secondary battery having excellent dedoping capacity (discharge capacity), non-dedoping capacity (irreversible capacity), and charge-discharge efficiency. The object can be solved by a carbonaceous material for non-aqueous electrolyte secondary batteries characterized in that the carbonaceous material is obtained by heat-treating plant-derived char which is demineralized in gas-phase, and carbon precursor (i.e. non-graphitizable carbon precursor, graphitizable carbon, or mixture thereof) or volatile organic compound under a non-oxidizing gas atmosphere; and a specific surface area determined by a BET method is 10 m2/g or less.Type: ApplicationFiled: August 30, 2013Publication date: September 17, 2015Applicants: KUREHA CORPORATION, KURARAY CHEMICAL CO., LTD., KURARAY CO., LTD.Inventors: Makoto Imaji, Kenta Aoki, Yasuhiro Tada, Naohiro Sonobe, Junichi Arima, Kenichi Koyakumaru, Hideharu Iwasaki, Kiyoto Otsuka, Jiro Masuko, Hajime Komatsu, Shinya Tago
-
Publication number: 20150190781Abstract: 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 mm3g. 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.Type: ApplicationFiled: June 21, 2013Publication date: July 9, 2015Applicants: Kuraray Chemical Co., Ltd., TANAKA KIKINZOKU KOGYO K.K.Inventors: Tetsuya Hanamoto, Takayuki Yamada, Yoshichika Sabae
-
Patent number: 9033158Abstract: The present invention provides molded activated carbon, and the molded activated carbon is produced by molding a mixture containing powdery activated carbon (a) having a median particle size of 80 ?m to 120 ?m and a standard deviation ?g of 1.3 to 1.9 in a particle size distribution and a fibrous binder (b). The molded activated carbon of the present invention has excellent removability for free residual chlorine, volatile organic compounds, CAT, and 2-MIB and excellent turbidity filterability, and is for use as a water purifier cartridge or the like.Type: GrantFiled: August 6, 2010Date of Patent: May 19, 2015Assignee: KURARAY CHEMICAL CO., LTD.Inventors: Hiroe Yoshinobu, Satoru Arita, Shuji Kawasaki
-
Patent number: 8864877Abstract: To provide an adsorbent which achieves a low-emission performance while maintaining the adsorption performance for adsorbing an evaporated fuel component, a canister comprising the adsorbent, and a method for reducing evaporated fuel emission. A second adsorbent (e.g., a granule) filled in a second compartment disposed in a downstream side with respect to a first compartment comprises an activated carbon as an adsorption site and a solid diluent as a non-adsorption site. The adsorbent has a difference in n-butane adsorption volume of not less than 35 g/L between a n-butane vapor concentration of 5% by volume and a n-butane vapor concentration of 50% by volume measured at 25° C., a butane working capacity measured in accordance with ASTM D5228 of not less than 8 g/dL, and a butane desorption rate of not less than 45% when a purge air amount measured in accordance with ASTM D5228 is 30 bed volumes of the adsorbent volume.Type: GrantFiled: February 7, 2013Date of Patent: October 21, 2014Assignee: Kuraray Chemical Co., Ltd.Inventors: Mitsunori Nishita, Mitsunori Hitomi, Takayuki Yamada
-
Publication number: 20130023405Abstract: 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.Type: ApplicationFiled: March 24, 2011Publication date: January 24, 2013Applicant: Kuraray Chemical Co., Ltd.Inventors: Mitsunori Hitomi, Takayuki Yoshikawa, Takayuki Yamada
-
Patent number: 8265330Abstract: A material for improving the sound pressure level at the bass reproduction limit of the present invention is composed of an activated carbon having a cumulative pore volume of 0.4 ml/g or more for the pores each having a radius of 50 angstroms or less. Preferably, this activated carbon has a cumulative pore volume of 0.1 ml/g or less for the pores each having a radius of 7 angstroms or less. In particular, when a sound pressure level improving material in which the activated carbon has a cumulative pore volume of 0.5 ml/g or more for the pores each having a radius of 18 angstroms or less is installed in a cabinet of a loudspeaker device, the material alleviates pressure fluctuations of a gas within the cabinet caused by vibration of a loudspeaker, and thus a very good bass reproduction effect is attained. Moreover, in the case where a sound pressure level improving material in which the activated carbon has a cumulative pore volume of 0.Type: GrantFiled: July 4, 2008Date of Patent: September 11, 2012Assignees: Kuraray Chemical Co., Ltd., Panasonic CorporationInventors: Yoshiharu Fukunishi, Takanori Kitamura, Kengo Tabata, Toshiyuki Matsumura, Shuji Saiki, Yoshimichi Kajihara, Satoshi Koura