Process for isolating H acid and K acid
    11.
    发明授权
    Process for isolating H acid and K acid 失效
    H酸和K酸分离方法

    公开(公告)号:US4426334A

    公开(公告)日:1984-01-17

    申请号:US368194

    申请日:1982-04-14

    CPC分类号: C07C303/44

    摘要: The invention relates to a process for isolating H acid and K acid in the form of their monoalkali metal salts from acid aqueous solutions which contain these two acids and alkali metal ions and may contain other aminonaphtholdisulphonic acids, in which process H acid monoalkali metal salts are precipitated at elevated temperatures from solutions which contain not only sodium ions but also potassium ions and then precipitating K acid monoalkali metal salts by cooling down the filtrate obtained after separating off the H acid monoalkali metal salts.

    摘要翻译: 本发明涉及一种从含有这两种酸和碱金属离子的酸性水溶液中分离其单碱金属盐形式的H酸和K酸的方法,并且可以含有其它氨基十氢四氢呋喃磺酸,其中H酸单碱金属盐为 在不仅含钠离子和钾离子的溶液中在高温下沉淀,然后通过冷却分离H酸单碱金属盐后得到的滤液而沉淀K酸单碱金属盐。

    Process for the preparation of 1-amino-8-naphthol-3,6-disulphonic acid
(H-acid)
    12.
    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-naphthylamine-4,6-disulphonic acid and
1-naphthylamine-2,4,6-trisulphonic acid
    15.
    发明授权
    Process for the preparation of 1-naphthylamine-4,6-disulphonic acid and 1-naphthylamine-2,4,6-trisulphonic acid 失效
    1-萘胺-4,6-二磺酸和1-萘胺-2,4,6-三磺酸的制备方法

    公开(公告)号:US4338261A

    公开(公告)日:1982-07-06

    申请号:US247416

    申请日:1981-03-25

    CPC分类号: C07C303/06

    摘要: Improved process for the preparation of 1-naphthylamine-4,6-disulphonic acid wherein the sulphonation of the 1-naphthylamine-6-sulphonic acid is carried out by adding the oleum at a temperature of 10.degree. to 70.degree. C., either to initially introduce sulphuric acid simultaneously with the 1-naphthylamine-6-sulphonic acid or to 1-naphthylamine-6-sulphonic acid, which is dissolved or suspended in sulphuric acid, and by using such a molar ratio of sulphur trioxide to 1-naphthylamine-6-sulphonic acid that 1.2 to 3 mols of sulphur trioxide are present per mol of 1-naphthylamine-6-sulphonic acid. The sulphonation mixture formed in the preparation can be sulphonated in a second sulphonation stage to 1-naphthylamine-2,4,6-trisulphonic acid.

    摘要翻译: 制备1-萘胺-4,6-二磺酸的改进方法,其中1-萘胺-6-磺酸的磺化是通过在10℃至70℃的温度下加入发烟硫酸来进行的, 最初与1-萘胺-6-磺酸或溶解或悬浮在硫酸中的1-萘胺-6-磺酸同时引入硫酸,并且通过使用三氧化硫与1-萘胺-6-磺酸的摩尔比, 6-磺酸,每摩尔1-萘胺-6-磺酸存在1.2〜3摩尔三氧化硫。 在制备中形成的磺化混合物可以在第二个磺化阶段中磺化成1-萘胺-2,4,6-三磺酸。

    Process for the preparation of 1-amino-8-naphthol-3,6-disulphonic acid
(H-acid)
    16.
    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 preparing 4,6-diamino-resorcinol dihydrochloride
    18.
    发明授权
    Process for preparing 4,6-diamino-resorcinol dihydrochloride 失效
    制备4,6-二氨基间苯二酚二盐酸盐的方法

    公开(公告)号:US6093852A

    公开(公告)日:2000-07-25

    申请号:US180972

    申请日:1998-11-17

    CPC分类号: C07C213/02

    摘要: The invention concerns 4,6-diamino-resorcinol which is prepared in the form of its dihydrochloride by catalytic hydrogenation of 1,3-benzyloxy-4,6-dinitrobenzene on a noble metal contact in a two-phase mixture of dilute aqueous hydrochloric acid and an organic solvent which is not miscible with dilute aqueous hydrochloric acid. This process is carried out at a pressure of between 1 and 200 bar and a temperature of between 0 and 200.degree. C.

    摘要翻译: PCT No.PCT / EP97 / 02409 Sec。 371日期:1998年11月17日 102(e)1998年11月17日PCT PCT 1997年5月12日PCT公布。 出版物WO97 / 44311 日期1997年11月27日本发明涉及通过在二相混合物中贵金属接触上的1,3-苄氧基-4,6-二硝基苯的催化氢化制备其二盐酸盐形式的4,6-二氨基间苯二酚 的稀盐酸水溶液和与稀盐酸水溶液不混溶的有机溶剂。 该方法在1至200巴之间的压力和0至200℃的温度下进行。

    Process for the preparation of 4,6-diaminoresorcinol
    19.
    发明授权
    Process for the preparation of 4,6-diaminoresorcinol 失效
    制备4,6-二氨基间苯二酚的方法

    公开(公告)号:US5574188A

    公开(公告)日:1996-11-12

    申请号:US549241

    申请日:1995-10-27

    摘要: 4,6-diaminoresorcinol can be prepared in a plurality of steps in such a way thata) 1,3-dichlorobenzene is nitrated with a mixed acid of HNO.sub.3, H.sub.2 SO.sub.4 and SO.sub.3 at 0 to 40.degree. C. in anhydrous H.sub.2 SO.sub.4,b) the resulting 1,3-dichloro-4,6/2,4-dinitrobenzene isomeric mixture is first reacted with benzyl alcohol in the presence of a strong base at -15.degree. C. to +15.degree. C. and then at 20.degree. to 40.degree. C. to give the dibenzyloxy compound andc) the 1,3-dibenzyloxy-4,6-dinitrobenzene isomer arising in pure form in b) is converted to the 4,6-diaminoresorcinol by catalytic hydrogenation.

    摘要翻译: 可以以多个步骤制备4,6-二氨基间苯二酚,使得a)在无水H 2 SO 4中在0至40℃下用HNO 3,H 2 SO 4和SO 3的混合酸硝化1,3-二氯苯,b) 所得的1,3-二氯-4,6 / 2,4-二硝基苯异构体混合物首先在强碱存在下在-15℃至+ 15℃下与苄醇反应,然后在20℃至 40℃,得到二苄氧基化合物,和c)在b)中以纯形式产生的1,3-二苄氧基-4,6-二硝基苯异构体通过催化氢化转化为4,6-二氨基间苯二酚。