Patents by Inventor Masahiro Iwahara
Masahiro Iwahara has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
-
Patent number: 11183708Abstract: Provided are a method for producing a sulfide solid electrolyte having a high Li ion conductivity, in which the production time can be greatly reduced, and a sulfur-based material that can be used in the production method for a sulfide solid electrolyte. The invention relates to a method for producing a sulfide solid electrolyte containing a lithium element, a sulfur element, a phosphorus element, an iodine element and a bromine element, which includes mixing and grinding lithium sulfide and lithium bromide followed by adding phosphorus sulfide and lithium iodide thereto and reacting them, and relates to a sulfur-based material.Type: GrantFiled: April 13, 2016Date of Patent: November 23, 2021Assignees: IDEMITSU KOSAN CO., LTD., TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Ryo Aburatani, Masahiro Iwahara, Fumio Yamakawa, Takuo Yanagi, Takumi Tanaka
-
Patent number: 10239027Abstract: An apparatus for producing lithium sulfide, including: a reaction container for allowing lithium hydroxide powder to be in contact with a hydrogen sulfide gas; a stirring blade inside the reaction container; a first heating apparatus that keeps the temperature of an inner wall of the reaction container that is in contact with the powder; and a second heating apparatus that keeps the temperature of an inner wall that is not in contact with the powder.Type: GrantFiled: December 16, 2015Date of Patent: March 26, 2019Assignee: IDEMITSU KOSAN CO., LTD.Inventors: Minoru Senga, Masahiro Iwahara
-
Publication number: 20180138545Abstract: Provided are a method for producing a sulfide solid electrolyte having a high Li ion conductivity, in which the production time can be greatly reduced, and a sulfur-based material that can be used in the production method for a sulfide solid electrolyte. The invention relates to a method for producing a sulfide solid electrolyte containing a lithium element, a sulfur element, a phosphorus element, an iodine element and a bromine element, which includes mixing and grinding lithium sulfide and lithium bromide followed by adding phosphorus sulfide and lithium iodide thereto and reacting them, and relates to a sulfur-based material.Type: ApplicationFiled: April 13, 2016Publication date: May 17, 2018Applicants: IDEMITSU KOSAN CO., LTD., TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Ryo ABURATANI, Masahiro IWAHARA, Fumio YAMAKAWA, Takuo YANAGI, Takumi TANAKA
-
Publication number: 20170368515Abstract: An apparatus for producing lithium sulfide, including: a reaction container for allowing lithium hydroxide powder to be in contact with a hydrogen sulfide gas; a stirring blade inside the reaction container; a first heating apparatus that keeps the temperature of an inner wall of the reaction container that is in contact with the powder; and a second heating apparatus that keeps the temperature of an inner wall that is not in contact with the powder.Type: ApplicationFiled: December 16, 2015Publication date: December 28, 2017Applicant: IDEMITSU KOSAN CO., LTD.Inventors: Minoru SENGA, Masahiro IWAHARA
-
Patent number: 7129382Abstract: There is disclosed a process for producing bisphenol A by subjecting phenol and acetone to condensation reaction in the presence of a catalyst composed of an acid type ion exchange resin which is modified in part with a sulfur-containing amine compound, wherein the ion exchange resin having a modification rate of 10 to less than 20 mol % is used for a methanol concentration in acetone of lower than 250 ppm by weight, and the ion exchange resin having a modification rate of 20 to 65 mol % is used for a methanol concentration in acetone of 250 to 8000 ppm by weight. The above process is capable of producing bisphenol A at high conversion and selectivity by suppressing deterioration of catalytic activity due to methanol as an impurity in acetone.Type: GrantFiled: April 13, 2004Date of Patent: October 31, 2006Assignee: Idemitsu Petrochemical Co., Ltd.Inventors: Masahiro Iwahara, Tetsuya Saruwatari
-
Patent number: 6943273Abstract: Provided is a process for producing a bisphenol A by continuously feeding phenol and acetone into a reactor unit having at least two reaction zones connected in series. In the process, an acidic cation-exchange resin partially neutralized with a sulfur-containing nitrogen compound in from 15 to 50% of the acid site thereof is used as the catalyst, and acetone having a methanol concentration of at most 3,000 ppm is separately fed into at least two reaction zones in the reactor unit. The life of the acidic cation-exchange resin catalyst used in the process is prolonged.Type: GrantFiled: August 2, 2002Date of Patent: September 13, 2005Assignee: Idemitsu Kosan Co., Ltd.Inventors: Tetsuya Saruwatari, Masahiro Iwahara
-
Patent number: 6825386Abstract: Provided are a catalyst of high activity and good heavy substance resistance and alcohol resistance for production of bisphenols, and a method for producing bisphenols with the catalyst. The catalyst is a sulfonic acid-type cation-exchange resin modified with (a) a pyridinealkanethiol and (b) an aminoalkanethiol and/or a thiazolidine; and the method comprises reacting a phenol and a ketone in the presence of the catalyst for producing bisphenols.Type: GrantFiled: August 27, 2003Date of Patent: November 30, 2004Assignee: Idemitsu Petrochemical Co., Ltd.Inventors: Masahiro Iwahara, Tetsuya Saruwatari
-
Publication number: 20040192975Abstract: There is disclosed a process for producing bisphenol A by subjecting phenol and acetone to condensation reaction in the presence of a catalyst composed of an acid type ion exchange resin which is modified in part with a sulfur-containing amine compound, wherein the ion exchange resin having a modification rate of 10 to less than 20 mol % is used for a methanol concentration in acetone of lower than 250 ppm by weight, and the ion exchange resin having a modification rate of 20 to 65 mol % is used for a methanol concentration in acetone of 250 to 8000 ppm by weight. The above process is capable of producing bisphenol A at high conversion and selectivity by suppressing deterioration of catalytic activity due to methanol as an impurity in acetone.Type: ApplicationFiled: April 13, 2004Publication date: September 30, 2004Applicant: IDEMITSU PETROCHEMICAL CO., LTD.Inventors: Masahiro Iwahara, Tetsuya Saruwatari
-
Publication number: 20040127753Abstract: Provided are a catalyst of high activity and good heavy substance resistance and alcohol resistance for production of bisphenols, and a method for producing bisphenols with the catalyst. The catalyst is a sulfonic acid-type cation-exchange resin modified with (a) a pyridinealkanethiol and (b) an aminoalkanethiol and/or a thiazolidine; and the method comprises reacting a phenol and a ketone in the presence of the catalyst for producing bisphenols.Type: ApplicationFiled: August 27, 2003Publication date: July 1, 2004Inventors: Masahiro Iwahara, Tetsuya Saruwatari
-
Patent number: 6740784Abstract: There is disclosed a process for producing bisphenol A by subjecting phenol and acetone to condensation reaction in the presence of a catalyst composed of an acid type ion exchange resin which is modified in part with a sulfur-containing amine compound, wherein the ion exchange resin having a modification rate of 10 to less than 20 mol % is used for a methanol concentration in acetone of lower than 250 ppm by weight, and the ion exchange resin having a modification rate of 20 to 65 mol % is used for a methanol concentration in acetone of 250 to 8000 ppm by weight. The above process is capable of producing bisphenol A at high conversion and selectivity by suppressing deterioration of catalytic activity due to methanol as an impurity in acetone.Type: GrantFiled: October 29, 2002Date of Patent: May 25, 2004Assignee: Idemitsu Petrochemical Co., Ltd.Inventors: Masahiro Iwahara, Tetsuya Saruwatari
-
Publication number: 20040030196Abstract: Provided is a process for producing a bisphenol A by continuously feeding phenol and acetone into a reactor unit having at least two reaction zones connected in series. In the process, an acidic cation-exchange resin partially neutralized with a sulfur-containing nitrogen compound in from 15 to 50% of the acid site thereof is used as the catalyst, and acetone having a methanol concentration of at most 3,000 ppm is separately fed into at least two reaction zones in the reactor unit. The life of the acidic cation-exchange resin catalyst used in the process is prolonged.Type: ApplicationFiled: May 30, 2003Publication date: February 12, 2004Inventors: Tetsuya Saruwatari, Masahiro Iwahara
-
Patent number: 6653513Abstract: Provided is a process for producing bisphenol A having a stable color tone at a high temperature and free from coloration, which comprises reacting phenol with acetone in the presence of an acid ion-exchange resin as a catalyst and an alkyl mercaptan as a cocatalyst, wherein a concentration of an organosulfur compound in a crystallization starting material obtained by conducting the reaction under conditions that a reaction temperature is between 60 and 100° C., a phenol to acetone molar ratio is between 6 and 13 and an acetone to alkyl mercaptan molar ratio is between 13 and 25, distilling off unreacted acetone, by-product water and the alkyl mercaptan as the cocatalyst and further distilling off excess phenol is measured, and maintained at 200 weight ppm or less.Type: GrantFiled: June 22, 2000Date of Patent: November 25, 2003Assignee: Idemitsu Petrochemical Co., Ltd.Inventor: Masahiro Iwahara
-
Publication number: 20030153792Abstract: There is disclosed a process for producing bisphenol A by subjecting phenol and acetone to condensation reaction in the presence of a catalyst composed of an acid type ion exchange resin which is modified in part with a sulfur-containing amine compound, wherein the ion exchange resin having a modification rate of 10 to less than 20 mol % is used for a methanol concentration in acetone of lower than 250 ppm by weight, and the ion exchange resin having a modification rate of 20 to 65 mol % is used for a methanol concentration in acetone of 250 to 8000 ppm by weight. The above process is capable of producing bisphenol A at high conversion and selectivity by suppressing deterioration of catalytic activity due to methanol as an impurity in acetone.Type: ApplicationFiled: October 29, 2002Publication date: August 14, 2003Inventors: Masahiro Iwahara, Tetsuya Saruwatari
-
Patent number: 6586637Abstract: Acetone and phenol are reacted in the presence of an acid-type ion exchange resin. The reaction mixture obtained from the reaction is subjected to a reduced-pressure distillation to recover bisphenol A as a fraction discharged from the bottom of a distillation column. Before the reaction, the acid-type ion exchange resin is washed with phenol to produce a phenol solution. The phenol solution is distilled together with a fraction obtained from the top of a distillation column. The bisphenol A produced in the process exhibits a stable hue.Type: GrantFiled: September 7, 2001Date of Patent: July 1, 2003Assignee: Idemitsu Petrochemical Co., Ltd.Inventor: Masahiro Iwahara
-
Publication number: 20030013925Abstract: There is provided a process for producing bisphenol A exhibiting a stable hue without undesired coloration even when treated at an elevated temperature. In the process for producing bisphenol A by reacting acetone with phenol in the presence of an acid-type ion exchange resin as a catalyst and then subjecting the reaction mixture to a reduced-pressure distillation to recover the bisphenol A from a fraction discharged from a bottom of distillation column, said process comprises: washing said acid-type ion exchange resin filled in a reactor with phenol before used in the reaction; and distilling a phenol solution obtained after the washing together with a fraction obtained from a top of the distillation column to recover phenol.Type: ApplicationFiled: September 7, 2001Publication date: January 16, 2003Inventor: Masahiro Iwahara
-
Patent number: 6429343Abstract: The present invention provides a process for producing bisphenol A which is capable of prolonging the life of an acid-type ion exchange resin partially modified with a sulfur-containing amine compound as catalyst, and increasing the yield of bisphenol A per unit quantity of the catalyst. There is disclosed a process for producing bisphenol A by reacting acetone with phenol in the presence of an acid-type ion exchange resin partially modified with a sulfur-containing amine compound as catalyst and alkylmercaptan as co-catalyst, said process comprising: conducting said reaction using a multi-stage reaction apparatus comprising at least two individual reactors connected in series to each other, wherein the molar ratio of total alkylmercaptan to total acetone and the molar ratio of total acetone to phenol are increased as the conversion rate of the phenol is decreased.Type: GrantFiled: August 21, 2001Date of Patent: August 6, 2002Assignee: Idemitsu Petrochemical Co., Ltd.Inventor: Masahiro Iwahara
-
Patent number: 6140533Abstract: A process for producing sec-butyl acrylate which comprises reacting acrylic acid with at least one member selected among butene-1, trans-2-butene, and cis-2-butene in a liquid phase in the presence of an ion exchange resin containing sulfo groups while regulating the content of water in the reaction system to 0.01 to 1.50 wt % based on the whole system, the reaction temperature to 40 to 120.degree. C., and the molar ratio of butene/acrylic acid to 1 to 6. According to this process, sec-butyl acrylate can be produced with a high selectivity and a high conversion while inhibiting catalyst deterioration.Type: GrantFiled: July 11, 1998Date of Patent: October 31, 2000Assignee: Idemitsu Petrochemical Co., Ltd.Inventor: Masahiro Iwahara
-
Patent number: 4952736Abstract: This invention is a process for production of an alkoxyalkyl group substituted phenol represented by the following formula (1) in high yields and at high selectivity: ##STR1## wherein R.sup.1, R.sup.2 and R.sup.3 each represents a hydrogen atom or an alkyl group; and R.sup.4 represents an alkyl group by reacting a phenol, an alcohol and an aldehyde in the presence of a catalyst selected from the group consisting of a tertiary alkylamine, a tertiary unsubstituted benzylamine, a mixture of a tertiary alkylamine and a tertiary unsubstituted benzylamine, a carbonate of alkali metal, a hydrogencarbonate of alkali metal and a mixture of a carbonate of alkali metal and a hydrogencarbonate of alkali metal, and recovering said alkoxyalkyl substituted phenol from said reaction product.Type: GrantFiled: January 24, 1990Date of Patent: August 28, 1990Assignee: Idemitsu Petrochmeical Company, LimitedInventor: Masahiro Iwahara
-
Patent number: 4769501Abstract: There is disclosed a process for producing an alkylphenol comprising reacting a phenol with an aldehyde and hydrogen in the presence of (a) an alkaline or alkaline earth metal catalyst selected from a hydroxide of an alkaline metal, hydroxide of an alkaline earth metal, a carbonate of an alkaline metal, and a hydrogencarbonate of an alkaline metal and (b) a hydrogenation catalyst. By the use of the process, the alkylphenols can be produced in good yield in one stage method.Type: GrantFiled: July 21, 1987Date of Patent: September 6, 1988Assignee: Idemitsu Petrochemical Co., Ltd.Inventor: Masahiro Iwahara