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Title:
METHOD FOR PRODUCING OXALIC ACID
Document Type and Number:
WIPO Patent Application WO/2018/066248
Kind Code:
A1
Abstract:
[Problem] To provide a method for producing oxalic acid with high efficiency by a simple process and within a short time. [Solution] An aqueous solution is prepared, which contains a carbohydrate, hydrogen carbonate ions and calcium ions, wherein the concentration of the carbohydrate is 0.025 mol/L or more, the concentration of the hydrogen carbonate ions is 0.044 mol/L or more, and the concentration of the calcium ions is 0.0018 mol/L or more. The aqueous solution is irradiated with non-equilibrium atmospheric pressure plasma. Immediately after the irradiation, crystals of calcium oxalate dihydrate begin to be precipitated.

Inventors:
ISHIKAWA Kenji (1 Furo-cho, Chikusa-ku, Nagoya-sh, Aichi 01, 〒4648601, JP)
HORI Masaru (1 Furo-cho, Chikusa-ku, Nagoya-sh, Aichi 01, 〒4648601, JP)
KURAKE Naoyuki (1 Furo-cho, Chikusa-ku, Nagoya-sh, Aichi 01, 〒4648601, JP)
TANAKA Hiromasa (1 Furo-cho, Chikusa-ku, Nagoya-sh, Aichi 01, 〒4648601, JP)
Application Number:
JP2017/030186
Publication Date:
April 12, 2018
Filing Date:
August 23, 2017
Export Citation:
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Assignee:
NATIONAL UNIVERSITY CORPORATION NAGOYA UNIVERSITY (1 Furo-cho, Chikusa-ku Nagoya-sh, Aichi 01, 〒4648601, JP)
International Classes:
C07C51/295; C07C55/06
Other References:
KURAKE, NAOYUKI ET AL.: "Synthesis of calcium oxalate crystals in culture medium irradiated with non-equilibrium atmospheric-pressure plasma", APPLIED PHYSICS EXPRESS, vol. 9, 1 September 2016 (2016-09-01), pages 096201-1 - 096201-4, XP055498985
KURAKE, NAOYUKI: "Study on biomedical and chemical reactions in culture medium irradiated with non-equilibrium atmospheric pressure plasmas", HAKUSHI RONBUN (KOGAKU) KO 11912, 27 March 2017 (2017-03-27), pages 1 - 243, XP055499117, Retrieved from the Internet
Attorney, Agent or Firm:
FUJITANI Osamu (Marunouchi KS Bldg. 16F, 18-25 Marunouchi 2-chome, Naka-ku, Nagoya-sh, Aichi 02, 〒4600002, JP)
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