Process for the preparation of 1-amino-8-naphthol-3,6-disulphonic acid
(H-acid)
    3.
    发明授权
    Process for the preparation of 1-amino-8-naphthol-3,6-disulphonic acid (H-acid) 失效
    制备1-氨基-8-萘酚-3,6-二磺酸(H酸)的方法

    公开(公告)号:US4178308A

    公开(公告)日:1979-12-11

    申请号:US920033

    申请日:1978-06-28

    CPC分类号: C22B34/12

    摘要: A process has been invented for the preparation of a mono-alkali metal salt of 1-amino-8-naphthol-3,6-disulphonic acid comprising reacting 1-naphthylamine-3,6,8-trisulphonic acid and/or a salt thereof and/or a naphthylamine-trisulphonic acid isomer mixture and/or salt thereof with an alkali metal hydroxide solution at elevated pressure and elevated temperature and in the presence of an alcohol or alcoholate, and separating out the mono-alkali metal salt by acidification. The process results in the procurement of higher yields of the desired product and in the formation of less by-products.

    摘要翻译: 已经发明了一种制备1-氨基-8-萘酚-3,6-二磺酸的单碱金属盐的方法,其包括使1-萘胺-3,6,8-三磺酸和/或其盐 和/或萘胺 - 三磺酸异构体混合物和/或其盐与碱金属氢氧化物溶液在升高的压力和升高的温度下,在醇或醇化物的存在下,通过酸化分离出单碱金属盐。 该过程导致采购更高产量的所需产品和形成较少的副产物。

    Process for the preparation of 1-amino-8-naphthol-3,6-disulphonic acid
(H-acid)
    6.
    发明授权
    Process for the preparation of 1-amino-8-naphthol-3,6-disulphonic acid (H-acid) 失效
    制备1-氨基-8-萘酚-3,6-二磺酸(H酸)的方法

    公开(公告)号:US4166826A

    公开(公告)日:1979-09-04

    申请号:US920032

    申请日:1978-06-28

    CPC分类号: C07C303/22

    摘要: A process has been invented for the preparation of a mono-alkali metal of 1-amino-8-naphthol-3,6-disulphonic acid, comprising reacting 1-naphthylamine-3,6,8-trisulphonic acid and/or a salt thereof and/or a naphthylamine trisulphonic acid isomer mixture and/or salt thereof with an alkali metal hydroxide solution in the presence of an alcohol and/or alcoholate and in the presence of a substance which contains at least one oxygen atom bonded to a nitrogen atom, at elevated pressure and elevated temperature, and separating out the mono-alkali metal salt of 1-amino-8-naphthol-3,6-disulphonic acid by acidification. The process results in the procurement of higher yields of the desired product and in the formation of less by-products.

    摘要翻译: 已经发明了一种制备1-氨基-8-萘酚-3,6-二磺酸的单碱金属的方法,包括1-萘胺-3,6,8-三磺酸和/或其盐 和/或萘胺三磺酸异构体混合物和/或其盐与碱金属氢氧化物溶液在醇和/或醇化物的存在下,在含有至少一个与氮原子键合的氧原子的物质存在下, 在升高的压力和升高的温度下,通过酸化分离出1-氨基-8-萘酚-3,6-二磺酸的单碱金属盐。 该过程导致采购更高产量的所需产品和形成较少的副产物。

    Process for the production of polyfunctional cyanic acid esters
    7.
    发明授权
    Process for the production of polyfunctional cyanic acid esters 失效
    制备多官能氰酸酯的方法

    公开(公告)号:US4046796A

    公开(公告)日:1977-09-06

    申请号:US658815

    申请日:1976-02-17

    CPC分类号: C07C261/02

    摘要: Highly pure aromatic polyfunctional cyanic acid esters having a high stability in storage and being extraordinary suitable for use as starting compound for the production of plastics by cyclopoly-trimerization are obtained by a special process. Alkaline earth and/or alkali metal salts of polyfunctional aromatic hydroxy compounds said alkaline earth and/or alkali metal compound capable of phenolate formation are used in excess of up to 0.1 mol per mol of aromatic hydroxy group are reacted with an excess of cyanogen halide. The cyanogen halide excess comprises up to 1 mol per mol of aromatic hydroxy group plus excess mol of the metal compound used for salt production.

    摘要翻译: 通过特殊的方法获得高度纯度的芳香族多官能氰酸酯,其储存稳定性高,非常适用于通过环聚三聚制备塑料的起始化合物。 使多官能芳族羟基化合物的碱土金属和/或碱金属盐使用能够形成苯酚的碱土金属和/或碱金属化合物超过每摩尔芳族羟基高达0.1摩尔与过量的卤化氰反应。 氰卤化物过量包括至多1摩尔每摩尔芳族羟基加上过量的用于生产盐的金属化合物。

    Process for the preparation of 1-amino-2-ethoxy-naphthalene-6-sulphonic
acid
    9.
    发明授权
    Process for the preparation of 1-amino-2-ethoxy-naphthalene-6-sulphonic acid 失效
    制备1-氨基-2-乙氧基 - 萘-6-磺酸的方法

    公开(公告)号:US4341719A

    公开(公告)日:1982-07-27

    申请号:US238327

    申请日:1981-02-26

    CPC分类号: C07C309/00

    摘要: A process for the preparation of 1-amino-2-ethoxy-naphthalene-6-sulphonic acid from 2-hydroxy-naphthalene-6-sulphonic acid which comprises:A. contacting 2-hydroxy-naphthalene-6-sulphonic acid with at least an equimolar amount of an alkali metal nitrite in aqueous solution or suspension in the presence of hydrochloric acid, solution or suspension having a pH in the range of 2 to 5 and being at a temperature of 0.degree. to 20.degree. C.;B. reducing the reaction product of step A in an aqueous suspension by contacting the same with excess iron in the presence of at least an equivalent amount of iron-II ions, relative to the reaction product obtained according to step A, in the presence of a mineral acid at a temperature from 50.degree. to 120.degree. C., and treating the thus-obtained reaction mixture with aqueous alkali metal hydroxide in the presence of iron oxide;C. contacting the product of step B with excess acetic anhydride in an aqueous solution or suspension at a pH in the range of 3 to 10 at a temperature from 0.degree. to 100.degree. C.;D. contacting the product of step C with an ethylating agent in the presence of an acid binding agent in an aqueous-organic solvent or diluent in a pH range from 8 to 14 at a temperature from 20.degree. to 150.degree. C.; andE. deacetylating the product of step D by contacting the same at reflux with an aqueous alkali metal hydroxide.

    摘要翻译: 一种从2-羟基 - 萘-6-磺酸制备1-氨基-2-乙氧基 - 萘-6-磺酸的方法,其包括:A.将2-羟基 - 萘-6-磺酸与至少 在盐酸,溶液或悬浮液的存在下,在pH为2至5,温度为0至20℃的水溶液或悬浮液中,等摩尔量的碱金属亚硝酸盐。 B.通过在相对于根据步骤A获得的反应产物存在下,在至少相当量的铁-II离子的存在下,使其与过量的铁接触,将步骤A的反应产物还原在水性悬浮液中 在50〜120℃的温度下进行无机酸处理,在氧化铁存在下用碱金属氢氧化物水溶液处理得到的反应混合物; C.将步骤B的产物与过量的乙酸酐在0至100℃的温度下,在3至10的pH范围内的水溶液或悬浮液中接触。 D.在酸性粘合剂存在下,在pH范围为8-14的含水有机溶剂或稀释剂中,在20-150℃的温度下,使步骤C的产物与乙基化剂接触。 和E.通过使其与碱金属氢氧化物水溶液在回流下使其脱离乙酰化步骤D的产物。