中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

387 records (took 0.017 seconds)

    Process for isolating dinitronaphthalenes
    175.
    发明授权
    Process for isolating dinitronaphthalenes 失效
    分离食品的方法

    公开(公告)号：US4053526A

    公开(公告)日：1977-10-11

    申请号：US672689

    申请日：1976-04-01

    Applicant: Heinz Ulrich Blank ,  Friedrich Durholz ,  Guido Skipka

    Inventor： Heinz Ulrich Blank ,  Friedrich Durholz ,  Guido Skipka

    IPC: C07C205/05 ,  C07C67/00 ,  C07C201/00 ,  C07C201/16 ,  C07C79/10

    CPC classification number: C07C201/16

    Abstract: 1,5- AND 1,8-DINITRONAPHTHALENES ARE ISOLATED FROM MIXTURES OF ISOMETRIC DINITRONAPHTHALENES AT LEAST CONTAINING THE SAME. The mixture of isomers is treated successively with a more polar solvent and a less polar aromatic solvent for dinitronaphthalenes thereby dissolving the mixture of isomers except for 1,5-dinitronaphthalenes which remains largely undissolved in the more polar solvent. The residual mixture of isomers is subsequently treated, after removal of the more polar solvent, with a less polar aromatic solvent at elevated temperatures in which 1,8-dinitronaphthalenes remains as a largely insoluble residue.

    Process for the purification of p-nitrophenol
    177.
    发明授权
    Process for the purification of p-nitrophenol 失效
    纯化对硝基苯酚的方法

    公开(公告)号：US3933929A

    公开(公告)日：1976-01-20

    申请号：US360097

    申请日：1973-05-14

    Applicant: Gilbert Colovray

    Inventor： Gilbert Colovray

    IPC: C07C205/22 ,  C07C67/00 ,  C07C201/00 ,  C07C201/16 ,  C07C37/22 ,  C07C37/40

    CPC classification number: C07C201/16 ,  C07C201/08 ,  C07C205/22

    Abstract: In a purification process for p-nitrophenol obtained by nitration of phenol, separation of crude nitrophenols, steam distillation to remove o-nitrophenol, and cooling the broth obtained when it contains more than 0.5% sodium bisulphite and is at pH 5.4 to 6.4 to deposit crystals of p-nitrophenol, an improvement consists in stirring the crystals with water at 55.degree.-85.degree.C to give a mixture containing 10-40% excess of p-nitrophenol over the solubility at that temperature, separating the upper layer of p-nitrophenol in water obtained, cooling it to 40.degree.-50.degree.C and separating the layer of water in p-nitrophenol, cooling the latter to below 30.degree.C and collecting the crystals deposited.

    Abstract translation: 在通过硝化苯酚获得的对硝基苯酚的纯化方法中，分离粗的硝基酚，蒸汽蒸馏以除去邻硝基苯酚，并且当其含有超过0.5％的亚硫酸氢钠时，获得的培养基冷却并且在pH 5.4至6.4下沉积 对硝基苯酚的晶体的改进在于在55℃-85℃下用水搅拌晶体，得到含有10-40％过量的对硝基苯酚的混合物超过该温度下的溶解度， 硝基苯酚在水中的溶液中，冷却至40°-50℃，分离出对硝基苯酚的水层，将其冷却至30℃以下，收集晶体沉积物。

    Trifluoromethyl-salicylanilides
    179.
    发明授权
    Trifluoromethyl-salicylanilides 失效
    三氟甲基水杨酰苯胺

    公开(公告)号：US3906034A

    公开(公告)日：1975-09-16

    申请号：US34155973

    申请日：1973-03-15

    Applicant: HOECHST AG

    Inventor： FRANZ RAIMUND ,  DUWEL DIETER

    IPC: A23K1/16 ,  A61K31/60 ,  C07C67/00 ,  C07C201/16 ,  C07C205/60 ,  C07C231/00 ,  C07C231/02 ,  C07C231/12 ,  C07C233/65 ,  C07C233/66 ,  C07C235/64 ,  C07C103/76

    CPC classification number: C07C205/60

    Abstract: Anthelminthically active salicylanilides of the formula

    IN WHICH X1 and X2 each represent hydrogen, chlorine, methyl or trifluoromethyl, Y1 and Y2 each represent hydrogen, chlorine or the nitrogroup, at least one of the substituents Y1 and Y2 not being hydrogen, and Z stands for -OH, -O-CO-alkyl or

    are described as well as their preparation by reacting a correspondingly substituted salicylic acid chloride or salicylic acid phenyl ester with an aniline derivative carrying the appropriate substituents or by nitrating a corresponding salicylanilide. The salicylanilides of the above formula are used as active ingredients in pharmaceutical preparations having anthelmintic activity.

    Abstract translation: 式I的抗真菌活性水杨酰胺，其中X1和X2各自表示氢，氯，甲基或三氟甲基，Y1和Y2各自表示氢，氯或硝基，取代基Y1和Y2中的至少一个不是氢，Z代表 -OH，-O-CO-烷基或-O-H 3 N + - ，并且通过使相应取代的水杨酸氯化物或水杨酸苯酯与携带适当取代基的苯胺衍生物或 通过硝化相应的水杨酰苯胺。 在具有驱虫活性的药物制剂中使用上式的水杨酰胺作为活性成分。

Patent Agency Ranking