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    • 4. 发明专利
    • Method for producing gamma-butyrolactone
    • 生产γ-丁内酯的方法
    • JP2013060428A
    • 2013-04-04
    • JP2012183343
    • 2012-08-22
    • Mitsubishi Chemicals Corp三菱化学株式会社
    • KONISHI NORIKAZUIZAWA YUSUKEUTSUNOMIYA MASARUTANAKA KOTA
    • C07D307/33C07B61/00
    • C07D307/33
    • PROBLEM TO BE SOLVED: To restrain a catalyst from deteriorating due to the elapse of time to improve a formation speed of gamma-butyrolactone and prevent a reaction by-product from being formed to efficiently produce gamma-butyrolactone when the gamma-butyrolactone is produced by the dehydrogenation of 1,4-butanediol in the presence of the catalyst.SOLUTION: In a method in which 1,4-butanediol as a raw material, is subjected to dehydrogenation to produce gamma-butyrolactone in the presence of a catalyst which contains a metal belonging to the groups 8-11 of the periodic table, the concentration of a nitrogen-containing compound in the 1,4-butanediol as the raw material is 0.5-15 weight ppm in terms of nitrogen atom. Making the 1,4-butanediol as the raw material contain a nitrogen-containing compound at a prescribed concentration restrains the formation of a by-product and the deterioration of the catalyst due to the elapse of time and improves the formation speed of the gamma-butyrolactone.
    • 待解决的问题:为了抑制由于时间的推移催化剂劣化,以提高γ-丁内酯的形成速度,并且防止当γ-丁内酯形成时副反应产物有效地产生γ-丁内酯 是在催化剂存在下通过1,4-丁二醇的脱氢制备的。 解决方案:在作为原料的1,4-丁二醇的方法中,在含有属于周期表第8-11族的金属的催化剂存在下进行脱氢制备γ-丁内酯 作为原料的1,4-丁二醇中的含氮化合物的浓度以氮原子计为0.5-15重量ppm。 制造1,4-丁二醇为原料含有规定浓度的含氮化合物可抑制副产物的形成和催化剂由于时间的劣化而提高γ射线衍射的形成速度, 丁内酯。 版权所有(C)2013,JPO&INPIT
    • 8. 发明专利
    • Method for producing tetrahydrofuran
    • 生产四氢呋喃的方法
    • JP2013116881A
    • 2013-06-13
    • JP2012149684
    • 2012-07-03
    • Mitsubishi Chemicals Corp三菱化学株式会社
    • KONISHI NORIKAZUIZAWA YUSUKEUTSUNOMIYA MASARUTANAKA KOTA
    • C07D307/08C07B61/00
    • PROBLEM TO BE SOLVED: To produce tetrahydrofuran stably at high productivity by preventing a solid material from being deposited during a cyclodehydration reaction when the tetrahydrofuran is produced through the cyclodehydration reaction of 1,4-butanediol by using an acid catalyst having a pKa value of no greater than 4.SOLUTION: The present invention is a method for producing tetrahydrofuran by means of a cyclodehydration reaction of 1,4-butanediol in the presence of an acid catalyst having a pKa value of no greater than 4 in a reaction vessel, wherein a starting material liquid containing 1,4-butanediol made available to the reaction contains 0.01-0.35 wt.% of 2-(4-hydroxybutoxy)-tetrahydrofuran and 1-1,000 wt.ppm inclusive by concentration of nitrogen atoms of at least either of an amine and amide.
    • 待解决的问题:通过使用具有pKa的酸催化剂通过1,4-丁二醇的环化脱水反应制备四氢呋喃时,通过防止在环化脱水反应期间固体材料沉积来以高生产率稳定地生产四氢呋喃 值不大于4.解决方案:本发明是通过1,4-丁二醇在pKa值不大于4的酸催化剂存在下,通过1,4-丁二醇的环化脱水反应生产四氢呋喃的方法 反应容器,其中含有可用于该反应的1,4-丁二醇的原料液体含有0.01-0.35重量%的2-(4-羟基丁氧基)四氢呋喃和1-1000重量ppm的含氮浓度的氮原子 的胺和酰胺中的至少一种。 版权所有(C)2013,JPO&INPIT
    • 10. 发明专利
    • Method of purifying 1,4-butanediol and method of manufacturing tetrahydrofuran
    • 纯化1,4-丁二醇的方法及制备四氢呋喃的方法
    • JP2013060429A
    • 2013-04-04
    • JP2012183344
    • 2012-08-22
    • Mitsubishi Chemicals Corp三菱化学株式会社
    • KONISHI NORIKAZUIZAWA YUSUKEUTSUNOMIYA MASARUTANAKA KOTA
    • C07C29/80C07C31/20C07D307/08
    • PROBLEM TO BE SOLVED: To provide an industrially useful method of purifying 1,4-butanediol in which purification is performed by separating and removing impurities that become the cause of staining during manufacture of tetrahydrofuran stably and efficiently from crude 1,4-butanediol at a low cost.SOLUTION: Crude 1,4-butanediol containing 100 ppm by weight to 1.2 wt.% chain aliphatic diol having 4 or 5 carbon atoms expressed by general formula (I) (aliphatic diol (I)) is distilled in a distillation tower. When the distilled 1,4-butanediol is removed from the bottom of the distillation tower, the concentration of aliphatic diol (I) within the bottom liquid is controlled to 1.0 ppm by weight to 99 ppm by weight. (In the formula, R, R, and Reach represent a hydrogen atom, a hydroxyl group, or a methyl group, and one among Rto Ris a hydroxyl group).
    • 待解决的问题:提供一种工业上有用的纯化1,4-丁二醇的方法,其中通过在粗制1,4-二醇的稳定和有效地分离和除去成为四氢呋喃的四氢呋喃的四氢呋喃的四氢呋喃的四氢呋喃的制备中, 丁二醇成本低。 解决方案:在蒸馏塔中蒸馏含有100重量ppm至1.2重量%的由通式(I)表示的具有4或5个碳原子的链脂肪族二醇(脂族二醇(I))的粗1,4-丁二醇 。 当从蒸馏塔的底部除去蒸馏的1,4-丁二醇时,底部液体中的脂肪族二醇(I)的浓度被控制在1.0重量ppm至99重量ppm。 (在公式中,R 1 ,R 2 ,R 3 各自表示氢原子,羟基或甲基,R“中的一个表示羟基,R”表示氢原子,羟基或甲基,R“ 组)。 版权所有(C)2013,JPO&INPIT