Patents by Inventor Naoki Narisawa

Naoki Narisawa 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).

  • Cyclohexanol, method for producing cyclohexanol, and method for producing adipic acid
    Patent number: 9771313
    Abstract: A purified cyclohexanol of the present invention has a methylcyclopentanol concentration of 10 to 1000 ppm by weight and a cyclohexylcyclohexene isomer concentration of 15 to 500 ppm by weight. A method for producing cyclohexanol of the present invention comprises: Step 1 of producing a solution (I) containing cyclohexanol, methylcyclopentanol, and water by a hydration reaction of cyclohexene; Step 2 of separating the solution (I) into a water phase and an oil phase; Step 3 of obtaining a partially purified cyclohexanol containing methylcyclopentanol from the oil phase; and Step 4 of separating and removing methylcyclopentanol in the partially purified cyclohexanol so as to obtain a purified cyclohexanol having a methylcyclopentanol concentration of 10 to 1000 ppm by weight and a cyclohexylcyclohexene isomer concentration of 15 to 500 ppm by weight.
    Type: Grant
    Filed: June 28, 2012
    Date of Patent: September 26, 2017
    Assignee: ASAHI KASEI CHEMICALS CORPORATION
    Inventors: Naoki Narisawa, Katsutoshi Tanaka
  • CYCLOHEXANOL, METHOD FOR PRODUCING CYCLOHEXANOL, AND METHOD FOR PRODUCING ADIPIC ACID
    Publication number: 20140256981
    Abstract: A purified cyclohexanol of the present invention has a methylcyclopentanol concentration of 10 to 1000 ppm by weight and a cyclohexylcyclohexene isomer concentration of 15 to 500 ppm by weight. A method for producing cyclohexanol of the present invention comprises: Step 1 of producing a solution (I) containing cyclohexanol, methylcyclopentanol, and water by a hydration reaction of cyclohexene; Step 2 of separating the solution (I) into a water phase and an oil phase; Step 3 of obtaining a partially purified cyclohexanol containing methylcyclopentanol from the oil phase; and Step 4 of separating and removing methylcyclopentanol in the partially purified cyclohexanol so as to obtain a purified cyclohexanol having a methylcyclopentanol concentration of 10 to 1000 ppm by weight and a cyclohexylcyclohexene isomer concentration of 15 to 500 ppm by weight.
    Type: Application
    Filed: June 28, 2012
    Publication date: September 11, 2014
    Applicant: ASAHI KASEI CHEMICALS CORPORATION
    Inventors: Naoki Narisawa, Katsutoshi Tanaka