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    • 1. 发明专利
    • DE69901519D1
    • 2002-06-27
    • DE69901519
    • 1999-02-17
    • NIPPON KASEI CHEM
    • SAITO HIDESHISUZUKI MIKIOSAKAMOTO SHOJIYOKOYAMA TOSHIHARUMAEDA KOUJI
    • C07C45/75C07C51/285C07C51/43C07C51/48C07C59/105C07C51/235C07C47/19C07C47/21
    • A process for producing 2,2'-bis(hydroxymethyl)alkanoic acid of the present invention, comprises: a 2,2'-bis(hydroxymethyl)alkanal production step (A1) of reacting aliphatic aldehyde having two hydrogen atoms bonded to alpha -carbon atom thereof, with formaldehyde in the presence of a water-soluble base; a 2,2'-bis(hydroxymethyl)alkanoic acid production step (B) of subjecting the thus obtained aqueous solution (a) containing 2,2'-bis(hydroxymethyl)alkanal and the base to oxidation treatment; and an alkanoic acid recovery step (C) of separating 2,2'-bis(hydroxymethyl)alkanoic acid from the thus obtained aqueous solution (b) containing the 2,2'-bis(hydroxymethyl)alkanoic acid and the base, in the alkanoic acid recovery step (C), a mineral acid being added to the aqueous solution (b) in an amount of not more than one equivalent based on the base in the aqueous solution (b) to convert the base into a salt thereof, water in the aqueous solution (b) being replaced with an organic solvent to form an organic solvent solution, and after removing the mineral acid salt precipitated from the organic solvent solution, 2,2'-bis(hydroxymethyl)alkanoic acid being crystallized from the organic solvent solution.
    • 2. 发明专利
    • DE3856117D1
    • 1998-02-26
    • DE3856117
    • 1988-10-28
    • NIPPON KASEI CHEM
    • KAMEYAMA AKINORIWADA JUNNAKABAYASHI YUTAKA ARASHIYAMA-
    • C09K11/02H05B33/20
    • A phosphor paste suitable for forming a luminescent layer of a dispersion type electroluminescence element, which paste has a dielectric constant of not less than 10 at 1 KHz and 25 DEG C after being solidified, and which comprises a pulverized electroluminescent phosphor, an organic high dielectric substance and at least one compound solidifiable by radiation or which comprises a pulverized electroluminescent phosphor and at least one compound solidifiable by radiation, at least one of the solidifiable compounds having a dielectric constant of not less than 10 at 1 KHz and 25 DEG C when solidified; and a dielectric paste suitable for forming an insulator layer of a dispersion type electroluminescence element, which paste has a dielectric constant of not less than 10 at 1 KHz and 25 DEG C after being solidified, and which comprises at least one high dielectric substance selected from pulverized inorganic high dielectric substances and organic high dielectric substances, and at least one compound solidifiable by radiation or which comprises at least one compound solidifiable by radiation, at least one of the solidifiable compounds having a high dielectric constant after being solidified; and a dispersion type electroluminescence element which comprises a luminescent layer and an insulator layer disposed between a transparent electrode and a back electrode, the luminescent layer and the insulator layer having been produced by forming a layer having a high dielectric constant when solidified from a high dielectric paste, applying a phosphor paste thereto to form a phosphor paste layer, and solidifying the layers with radiation.