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    • 3. 发明授权
    • Process for producing chroman compound
    • 苯并二氢吡喃化合物的制备方法
    • US07615650B2
    • 2009-11-10
    • US10587545
    • 2005-01-28
    • Kazuo TanakaYouichi KyuukoToshio Hidaka
    • Kazuo TanakaYouichi KyuukoToshio Hidaka
    • C07D311/66
    • C07D311/66C07D311/62
    • The invention provides a process for producing a chroman compound represented by formula (1), characterized in that the process includes allowing a phenol, an unsaturated compound, and a formaldehyde to react in the absence of catalyst and in the presence of water in an amount by mole 1 to 10 times that of the phenol.According to the present invention, a high-purity chroman compound can be produced in the absence of catalyst and under mild conditions. In addition, the invention provides an industrial means for producing the compound, without using a large amount of an acid or a base serving as a reaction promoter or a catalyst, which would otherwise cause side reactions, apparatus corrosion, etc.
    • 本发明提供一种制备由式(1)表示的苯并二氢吡喃化合物的方法,其特征在于该方法包括使苯酚,不饱和化合物和甲醛在不存在催化剂的情况下和在水存在下反应, 为摩尔比的1〜10倍。 根据本发明,可以在不存在催化剂的条件下,在温和的条件下生产高纯度色满化合物。 此外,本发明提供了一种用于生产化合物的工业方法,而不使用大量的酸或作为反应促进剂或催化剂的碱,否则会引起副反应,装置腐蚀等。
    • 6. 发明授权
    • Process for producing alkali pulp
    • 碱浆生产工艺
    • US4274913A
    • 1981-06-23
    • US41505
    • 1979-05-22
    • Makoto KikuiriYoshimi NakashioYasue AraiToshio Hidaka
    • Makoto KikuiriYoshimi NakashioYasue AraiToshio Hidaka
    • D21C3/02D21C3/24D21C3/26D21C7/08
    • D21C7/08D21C3/263
    • A process for producing alkali pulp by using a single, cylindrical pressurized reaction vessel having therein a liquor-inpregnating zone, a cooking zone, a washing zone, and a diluting zone in that order, and having a motor-driven scraping or agitating device and a pulp discharging outlet in the end portion of the diluting zone. Alkaline aqueous medium containing dissolved oxygen therein is introduced into the diluting zone. A part of the introduced alkaline aqueous medium countercurrently contacts cooked cellulosic materials transferred from the washing zone to the diluting zone to proceed with oxygen-alkali delignification, and is finally discharged out of the vessel from the end portion of the cooking zone. The remainder of the introduced alkaline aqueous medium contacts the cooked cellulosic materials in the diluting zone in a scraping or agitating manner by means of the motor-driven scraping or agitating device to proceed with oxygen-alkali delignification, and finally serves as diluting liquor to be discharged out of the vessel accompanying the resulting pulp.
    • 一种通过使用其中具有浸渍浸渍区,蒸煮区,洗涤区和稀释区的单个圆柱形加压反应容器来生产碱浆的方法,并且具有马达驱动的刮擦或搅拌装置和 在稀释区的端部的纸浆排出口。 将含有溶解氧的碱性水性介质引入稀释区。 引入的碱性水性介质的一部分与从洗涤区转移到稀释区的煮熟的纤维素材料逆流接触,进行氧碱脱木质素,最后从烹调区的端部排出容器。 引入的碱性水性介质的其余部分通过马达驱动的刮擦或搅拌装置以刮擦或搅拌方式与稀释区中的熟化纤维素材料接触,进行氧碱脱木质素,最后作为稀释液体 从伴随所产生的纸浆的容器中排出。
    • 7. 发明申请
    • METHOD OF PRODUCING S-(-)-6-HYDROXY-2,5,7,8-TETRAMETHYLCHROMANE-2-CARBOXYLIC ACID AND PRODUCT OBTAINED BY THE METHOD
    • 生产S - ( - ) - 6-羟基-2,5,7,8-四甲基-2-羟基-2-羧酸的方法及其方法
    • US20100063305A1
    • 2010-03-11
    • US12312125
    • 2007-10-25
    • Akifumi IidaYouichi KyuukoToshio Hidaka
    • Akifumi IidaYouichi KyuukoToshio Hidaka
    • C07D311/04
    • C07D311/66C07B53/00
    • The present invention provides an industrially available method for efficiently producing high-purity S-(−)-6-hydroxy-2,5,7,8-tetramethylchromane-2-carboxylic acid excellent in solid-liquid separability from an S-(−)-6-hydroxy-2,5,7,8-tetramethylchromane-2-carboxylic acid ester, and also provides products obtained by the method.Under a temperature condition of 50-80° C. in an aqueous solvent, (A) an S-(−)-6-hydroxy-2,5,7,8-tetramethylchromane-2-carboxylic acid ester represented by the general formula (1) is hydrolyzed under a basic condition for 1-3 hours; then (B) the insoluble matters contained in the reaction solution resulting from the hydrolysis are removed; and (C) an acid is added to the resulting solution to effect crystallization; provided that R in the general formula (1) represents an alkyl or aryl group.
    • 本发明提供了一种工业上可行的方法,用于有效地生产出具有优异的S - ( - ) - ( - ) - 羟基-2,4,5,6,7,8-四甲基苯并二氢吡喃-2-羧酸的高纯度S - ( - ) - )-6-羟基-2,5,7,8-四氢苯并二氢吡喃-2-羧酸酯,并且还提供通过该方法获得的产物。 在水性溶剂中在50-80℃的温度条件下,(A)由通式(A)表示的S - ( - ) - 6-羟基-2,5,7,8-四氢苯并二氢吡喃-2-羧酸酯 (1)在碱性条件下水解1-3小时; 然后(B)去除由水解产生的反应溶液中所含的不溶物; 和(C)向所得溶液中加入酸以进行结晶; 条件是通式(1)中的R表示烷基或芳基。