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94 条记录 (耗时 0.061 秒)

    Process for the preparation of hydroxynapthalenes
    1.
    发明授权
    Process for the preparation of hydroxynapthalenes 失效
    羟基萘制备方法

    公开(公告)号：US5981806A

    公开(公告)日：1999-11-09

    申请号：US33195

    申请日：1998-03-02

    申请人： Thomas Pelster

    发明人： Thomas Pelster

    IPC分类号： B01J31/02 ,  C07B61/00 ,  C07C37/04 ,  C07C39/14 ,  C07C213/00 ,  C07C215/86 ,  C07D241/38

    CPC分类号： C07D241/38 ,  C07C213/00 ,  C07C37/04

    摘要： The present invention relates to a process for the preparation of hydroxynaphthalenes of formula (I) ##STR1## wherein n represents a number from 1 to 6,X denotes C.sub.1 -C.sub.6 alkyl, halogen, carboxyl, carboxylic acid ester, nitro, chlorosulphonyl, arylsulphonyl, hydroxyl, alkoxy, acyloxy, or an amino or aminosulphonyl that is unsubstituted or N-substituted with alkyl or aryl, or two radicals X, together with the adjacent carbon atoms to which they are bonded, form a fused-on aromatic, cycloaliphatic, or heterocyclic ring, andm denotes a number from 0 to 6, wherein if m is greater than 1, then each X can have different or identical meanings,by reacting(1) a naphthalenesulphonic acid of formula (II) or a salt thereof ##STR2## wherein n and m have the above meanings and X.sub.1 has the same meaning as X or is SO.sub.3 H, with(2) alkali in the presence of(3) an alkylated urea derivative.

    摘要翻译： 本发明涉及一种制备式（I）的羟基萘的方法，其中n表示1至6的数，X表示C 1 -C 6烷基，卤素，羧基，羧酸酯，硝基，氯磺酰基，芳基磺酰基，羟基， 烷氧基，酰氧基或未被取代或被烷基或芳基取代的氨基或氨基磺酰基，或两个基团X与它们所连接的相邻碳原子一起形成稠合的芳族，脂环族或杂环 ，m表示0至6的数，其中如果m大于1，则每个X可以具有不同或相同的含义，通过使（1）式（II）的萘磺酸或其盐，其中n和m 具有上述含义，X 1与X相同或为SO 3 H，（2）在（3）烷基化脲衍生物存在下的碱。

    Process for preparing m-alkylhydroxybenzene
    3.
    发明授权
    Process for preparing m-alkylhydroxybenzene 失效
    制备m-烷基羟基苯的方法

    公开(公告)号：US4475002A

    公开(公告)日：1984-10-02

    申请号：US444696

    申请日：1982-11-26

    申请人： Mitsuhiro Wada ,  Seizi Maki

    发明人： Mitsuhiro Wada ,  Seizi Maki

    IPC分类号： C07C37/04 ,  C07C37/86 ,  C07C39/06

    CPC分类号： C07C309/00 ,  C07C37/04

    摘要： An improved process for preparing m-alkylhydroxybenzene which comprises heating alkylbenzene or an isomeric mixture of alkylbenzenesulfonic acid in the presence of sulfuric acid and an inorganic salt at a temperature of from 150.degree. to 210.degree. C. to form an isomeric mixture of alkylbenzenesulfonic acid which is rich in the m-isomer, selectively hydrolyzing the isomers of alkylbenzenesulfonic acid other than the m-isomer, and caustically fusing the unhydrolyzed alkylbenzenesulfonic acid.

    摘要翻译： 一种制备间 - 烷基羟基苯的改进方法，包括在150-210℃的温度下，在硫酸和无机盐的存在下，加热烷基苯或烷基苯磺酸的异构体混合物，形成烷基苯磺酸的异构混合物， 富含m-异构体，选择性水解除了m-异构体之外的烷基苯磺酸的异构体，并苛性地熔融未水解的烷基苯磺酸。

    Method for the preparation of meta dihydroxybenzenes
    4.
    发明授权
    Method for the preparation of meta dihydroxybenzenes 失效
    制备甲基二羟基苯甲酸的方法

    公开(公告)号：US4009212A

    公开(公告)日：1977-02-22

    申请号：US602767

    申请日：1975-08-07

    申请人： Gerd Leston

    发明人： Gerd Leston

    IPC分类号： C07C37/04 ,  C07C39/06

    CPC分类号： C07C37/04

    摘要： A process for the preparation of dihydroxybenzenes whereby there are obtained primarily meta isomers of the dihydroxybenzenes includes the steps of: preparing a mixture of sulfonic acid isomers by sulfonation-isomerization of an hydroxybenzene having the formula: ##STR1## in which R and R' are selected from the group consisting of hydrogen and an alkyl radical having at most 4 carbon atoms per molecule, the total carbon atoms in radicals R and R' being at most 4; subjecting the so-produced sulfonic acids to selective hydrolyzation in aqueous medium at a temperature between about 100.degree. and 150.degree. C., the monohydroxy benzene being recovered by the said selective hydrolyzation in an enriched concentration that makes it readily recoverable by recycle in the process or other separation methods, and unhydrolyzed sulfonic acid remaining in the said aqueous medium; caustically fusing the said unhydrolyzed sulfonic acid, and liberating by acidification the desired dihydroxybenzene.