Patents Assigned to ADCHEMCO Corporation
-
Patent number: 6547990Abstract: An activated carbon for an electric double layer capacitor electrode, which comprises a stacking structure having 2 layers or less of in a proportion stacking of from 25 to 80% and a stacking structure having 5 layers or more in a proportion of from 2 to 30% in the distribution of a stacking structure as obtained by analysis of the X-ray diffraction pattern of (002) plane, and which has a specific surface area of from 500 to 2,800 m2/g and a total pore volume of from 0.5 to 1.8 cm3/g.Type: GrantFiled: June 27, 2001Date of Patent: April 15, 2003Assignees: Asahi Glass Company, Limited, Adchemco CorporationInventors: Yasuo Shinozaki, Kazuya Hiratsuka, Toshiharu Nonaka, Kazuyuki Murakami
-
Publication number: 20030065226Abstract: A method for preparing bromofluorenes includes a step of dispersing a compound selected from the group consisting of fluorene, fluorenone, and derivatives of fluorene and fluorenone in water to prepare a disperse system. Bromination is initiated by adding bromine Br2 into the disperse system. Thus, bromofluorenes can be efficiently and economically prepared without using any environmentally harmful organic solvent requiring a high cost to dispose of.Type: ApplicationFiled: September 17, 2002Publication date: April 3, 2003Applicant: ADCHEMCO CorporationInventors: Tetsuo Hachiya, Naoyuki Kitamura, Hiroaki Mori, Toshiyuki Yasuda
-
Patent number: 6485864Abstract: Boron-substituted graphite, which contains N-bonded boron atoms in a small proportion relative to whole substituted boron atoms, is produced by heating a feed fine particulate mixture of an infusibilized carbonaceous material and a boron compound such that the carbonaceous material is carbonized into a carbon structure, raising a temperature of the resulting heated fine particulate mixture promptly to a graphitization treatment temperature in an inert atmosphere unreactive with boron, retaining the graphitization treatment temperature for a time sufficient to allow graphitization of the carbon structure to proceed to a desired extent, and then quickly cooling the resulting graphitized mixture. The boron-substituted graphite is useful as a negative electrode in a lithium-ion secondary battery.Type: GrantFiled: February 11, 2000Date of Patent: November 26, 2002Assignee: Adchemco CorporationInventors: Kunio Miyazawa, Masayasu Nagoshi, Kenshi Noda, Takaaki Kondo, Tetsuo Shiode, Hidetoshi Morotomi, Hiromi Okamoto, Yasuhiro Mogi, Kazuteru Tabayashi
-
Patent number: 6344585Abstract: A tetrahydrofluorene, which is represented by the following formula (I) wherein R1 to R6 each independently represent a hydrogen atom or an alkyl group having 1 to 4 carbon atoms, or R1 and R2 are combined together to represent ═O, ═N or ═S, R7 and R8 each independently represent a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, an alkoxy group having 1 to 4 carbon atoms, a halogen atom, a hydroxyl group or a carboxyl group, is subjected to a hydrogen transfer reaction in the presence of a hydrogen acceptor and a catalyst, whereby a fluorene and a hydride of the hydrogen acceptor are formed at the same time.Type: GrantFiled: January 25, 2001Date of Patent: February 5, 2002Assignee: Adchemco CorporationInventor: Hiroaki Mori
-
Publication number: 20010023819Abstract: Indene is produced from an indene-containing coal tar distillate by adding a glycol to the indene-containing coal tar distillate and then conducting azeotropic distillation to obtain an indene fraction while eliminating benzonitrile from the indene-containing coal tar distillate.Type: ApplicationFiled: January 25, 2001Publication date: September 27, 2001Applicant: ADCHEMCO CorporationInventors: Hiroaki Mori, Youko Sugio
-
Patent number: 6291735Abstract: A process is provided for the preparation of high-purity indene. According to the process, impurities are eliminated by crystallization from an indene stock which is available in a concentrated form by distillation of a coal tar fraction and/or a petroleum fraction. High-purity indene having a purity of 99 wt. % or higher can be obtained.Type: GrantFiled: September 17, 1999Date of Patent: September 18, 2001Assignee: ADCHEMCO CorporationInventors: Yasuyuki Takigawa, Hiromi Nakaoka
-
Publication number: 20010011144Abstract: A tetrahydrofluorene, which is represented by the following formula (I) 1Type: ApplicationFiled: January 25, 2001Publication date: August 2, 2001Applicant: ADCHEMCO CorporationInventor: Hiroaki Mori
-
Patent number: 6150566Abstract: At least one xylenol isomer can be separated and purified from a mixture, which contains the specific xylenol isomer and at least one organic substance other than the specific xylenol isomer, by bringing the mixture into contact with 1,1-di(4-hydroxyphenyl)cyclohexane as a host compound to form a complex of the specific xylenol isomer as a guest compound with the host compound and then having the specific xylenol isomer released from the complex. The mixture may contain at least two xylenol isomers consisting of 2,4-xylenol and 2,5-xylenol, and at least one of the xylenol isomers can be separated and purified by having it released from its complex with the host compound.Type: GrantFiled: March 18, 1999Date of Patent: November 21, 2000Assignee: ADCHEMCO CorporationInventors: Tetsuo Hachiya, Seiji Aoki
-
Patent number: 5910383Abstract: A process is provided for the production of a carbonaceous material. The process comprises the following steps: subjecting a vacuum distillation residual pitch to heat treatment until the content of quinoline-insoluble components thereof becomes 50 to 85 wt. %, whereby the pitch is converted into a mesophase pitch; grinding the thus-obtained mesophase pitch into fine particles having an aspect ratio not greater than 2; subjecting the thus-ground product to oxidation treatment; and subjecting the thus-oxidized product to carbonization or graphitization treatment. A lithium ion secondary battery comprises a negative pole made of the carbonaceous material.Type: GrantFiled: September 12, 1997Date of Patent: June 8, 1999Assignee: Adchemco CorporationInventors: Yoshihiko Hase, Hidetoshi Morotomi, Hiromi Okamoto, Syoji Komura, Yasuyuki Takigawa, Shigeyuki Hirano, Tetsuo Shiode