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99 条记录 (耗时 0.017 秒)

    Process of producing isopropylnaphthols
    18.
    发明授权
    Process of producing isopropylnaphthols 失效
    生产异丙基萘酚的方法

    公开(公告)号：US5003113A

    公开(公告)日：1991-03-26

    申请号：US440212

    申请日：1989-11-22

    申请人： Michio Tanaka ,  Masayasu Ishibashi ,  Katsuo Taniguchi

    发明人： Michio Tanaka ,  Masayasu Ishibashi ,  Katsuo Taniguchi

    IPC分类号： C07C37/08 ,  C07C37/84 ,  C07C39/14 ,  C07C409/12

    CPC分类号： C07C409/12 ,  C07C37/08 ,  C07C37/84 ,  C07C407/00

    摘要： In a process of producing isopropylnaphthols by oxidizing diisopropylnaphthalenes with molecular oxygen in a liquid phase to provide a reaction mixture which contains therein diisopropylnaphthalene monohydroperoxides and then acid decomposing the monohydroperoxides to isopropylnaphthols, the improvement comprising separating an organic layer from the reaction mixture, adding lower aliphatic alcohols of 1-4 carbons to the organic layer, crystallizing the diisopropylnaphthalenes while allowing the diisopropylnaphthalene monohydroperoxides to remain dissolved in the lower aliphatic alcohols, thereby to separate the monohydroperoxides from the diisopropylnaphthalenes.A further improvement in the process comprises crystallizing the isopropylnaphthols from aromatic hydrocarbons of 6-12 carbons.

    Process for the preparation of 2,6-dihydroxynaphthalene
    19.
    发明授权
    Process for the preparation of 2,6-dihydroxynaphthalene 失效
    2,6-二羟基萘的制备方法

    公开(公告)号：US4861920A

    公开(公告)日：1989-08-29

    申请号：US167807

    申请日：1988-03-14

    申请人： Martin Clausen ,  Paul Rys

    发明人： Martin Clausen ,  Paul Rys

    IPC分类号： C07C37/08 ,  B01J31/04 ,  C07B61/00 ,  C07C27/00 ,  C07C39/14 ,  C07C67/00 ,  C07C409/12

    CPC分类号： C07C39/14 ,  C07C407/00

    摘要： Process for the preparation of 2,6-dihydroxynaphthalene from 2,6-dialkylnaphthalenes, which are dissolved in an inert solvent and are oxidized at temperatures from 50.degree. to 150.degree. C. by means of oxygen or oxygen donors, in the presence of an alkali metal salt or alkaline earth metal salt of an organic carboxylic acid having 5 to 14 carbon atoms, to give the corresponding 2,6-dialkylnaphthalene dihydroperoxides, and the latter are subsequently hydrolysed.The process results in pure, easily isolatable products in a good yield. The process products according to the invention are valuable intermediates for, inter alia, dyes, plastics, synthetic fibres, polymeric liquid crystals or pharmaceuticals.

    摘要翻译： 从2,6-二烷基萘制备2,6-二羟基萘的方法，它们在惰性溶剂中溶解并在50至150℃的温度下通过氧气或氧气供体氧化，在 具有5至14个碳原子的有机羧酸的碱金属盐或碱土金属盐，得到相应的2,6-二烷基萘二氢过氧化物，随后将其水解。 该方法产生纯，易分离的产品，产率良好。 根据本发明的方法产品是用于尤其是染料，塑料，合成纤维，聚合物液晶或药物的有价值的中间体。