Chromatographic fractionation of whey
    1.
    发明授权
    Chromatographic fractionation of whey 失效
    乳清色谱分级

    公开(公告)号:US3969337A

    公开(公告)日:1976-07-13

    申请号:US455484

    申请日:1974-03-27

    摘要: The process for the chromatographic fractionation of whey comprising passing whey through a column of an ion exchange material, thereafter passing water through said column as eluant, and collecting the aqueous effluent from said column as a plurality of fractions. Advantageously the ion exchange material is a polystyrene resin containing sulfonic acid groups neutralized with calcium ions and cross-linked with about 2 to 4% by weight of divinyl-benzene, and the eluant is demineralized water.

    摘要翻译: 乳清色谱分级方法包括使乳清通过离子交换材料的柱,然后将水作为洗脱液通过所述柱,并以多种馏分收集来自所述塔的含水流出物。 有利地,离子交换材料是含有用钙离子中和的磺酸基的聚苯乙烯树脂,并与约2-4重量%的二乙烯基 - 苯进行交联,洗脱剂是软化水。

    Process for the production of
5-(4'-chloro-5'-sulfamoyl-2'-thenylamino)-phenyltetrazole
    2.
    发明授权
    Process for the production of 5-(4'-chloro-5'-sulfamoyl-2'-thenylamino)-phenyltetrazole 失效
    制备5-(4'-氯-5'-氨磺酰基-2'-叔丁基氨基) - 苯基四唑的方法

    公开(公告)号:US4386212A

    公开(公告)日:1983-05-31

    申请号:US289934

    申请日:1981-08-04

    IPC分类号: C07D409/12 C07D257/04

    CPC分类号: C07D257/04

    摘要: The present invention provides a process for the preparation of 5-(4'-chloro-5'-sulfamoyl-2'-thenylamino)-phenyltetrazole by condensing 5-(4'-chloro-5'-sulfamoyl-2'-aminophenyl)-tetrazole with thiophene-2-aldehyde in the presence of an acid catalyst and reducing the 5-[4'-chloro-5'-sulfamoyl-2'-(thenylidene-2-amino)-phenyl]tetrazole so obtained with a boranate, wherein the condensation is carried out in dimethyl sulfoxide as solvent, with azeotropic distilling off of the water formed and the reduction is carried out in the same medium, without isolation of the 5-[4'-chloro-5'-sulfamoyl-2'-(thenylidene-2-amino)-phenyl]-tetrazole.

    摘要翻译: 本发明提供了通过将5-(4'-氯-5'-氨磺酰基-2'-氨基苯基) - 苯基四唑冷却而制备5-(4'-氯-5'-氨磺酰基-2'-叔丁基氨基) - 苯基四唑的方法, - 四唑与噻吩-2-醛在酸催化剂存在下还原5-(4'-氯-5'-氨磺酰基-2' - (亚丁基-2-氨基) - 苯基]四唑,用硼酸盐 其中缩合在作为溶剂的二甲基亚砜中进行,共沸蒸发形成的水,还原在相同的介质中进行,而不分离5- [4'-氯-5'-氨磺酰基-2 ' - (亚苄基-2-氨基) - 苯基] - 四唑。

    Process for the preparation of 1,4:3,6-dianhydro-D glucitol 5-nitrate
    3.
    发明授权
    Process for the preparation of 1,4:3,6-dianhydro-D glucitol 5-nitrate 失效
    制备1,4:3,6-二脱氢-D葡萄糖醇5-硝酸盐的方法

    公开(公告)号:US4431829A

    公开(公告)日:1984-02-14

    申请号:US276773

    申请日:1981-06-24

    CPC分类号: C07D493/04

    摘要: The present invention provides a process for the preparation of 1,4:3,6-dianhydro-D-glucitol-5-nitrate, in which(a) 1,4:3,6-dianhydro-D-glucitol is acetylated with 0.5 to 1.5 mole equivalents of acetic anhydride in the presence of a catalyst, a mixture of 1,4:3,6-dianhydro-D-glucitol-2-acetate, 1,4:3,6-dianhydro-D-glucitol-5-acetate and 1,4:3,6-dianhydro-D-glucitol-2,5-diacetate being obtained;(b) the mixture is nitrated with nitric acid, a mixture of 1,4:3,6-dianhydro-D-glucitol-2-acetate-5-nitrate and 1,4:3,6-dianhydro-D-glucitol-5-acetate-2-nitrate being obtained; and(c) hydrolysis is carried out with an inorganic base to give 1,4:3,6-dianhydro-D-glucitol-5-nitrate;wherein, in step (a), the reaction is carried out in the presence of a basic catalyst and the 1,4:3,6-dianhydro-D-glucitol-2,5-diacetate is substantially removed before further working up.

    摘要翻译: 本发明提供了制备1,4:3,6-二脱氢-D-葡萄糖醇-5-硝酸盐的方法,其中(a)将1,4:3,6-二脱氢-D-葡萄糖醇用0.5乙酰化 至1.5摩尔当量的乙酸酐,在催化剂存在下,将1,4:3,6-二脱氢-D-葡萄糖醇-2-乙酸酯,1,4:3,6-二脱氢-D-葡萄糖醇-5 乙酸酯和1,4:3,6-二脱氢-D-葡萄糖醇-2,5-二乙酸酯; (b)将混合物用硝酸硝化,将1,4:3,6-二脱水-D-葡萄糖醇-2-乙酸酯-5-硝酸盐和1,4:3,6-二脱氢-D-葡萄糖醇 - 5-乙酸酯-2-硝酸盐; 和(c)用无机碱进行水解,得到1,4:3,6-二脱氢-D-葡萄糖醇-5-硝酸盐; 其中,在步骤(a)中,反应在碱性催化剂的存在下进行,在进一步加工之前,基本上除去了1,4:3,6-二脱氢-D-葡萄糖醇-2,5-二乙酸酯。

    Process for the preparation of 4-hydroxycarbazole
    4.
    发明授权
    Process for the preparation of 4-hydroxycarbazole 失效
    4-羟基咔唑的制备方法

    公开(公告)号:US4273711A

    公开(公告)日:1981-06-16

    申请号:US163253

    申请日:1980-06-26

    IPC分类号: C07D209/88

    CPC分类号: C07C251/72 C07D209/88

    摘要: The present invention provides a process for the preparation of 4-hydroxycarbazole by the dehydration of 1,2,3,4-tetrahydro-4-oxocarbazole, wherein the reaction is carried out in aqueous alkaline solution, using Raney nickel as catalyst.

    摘要翻译: 本发明提供了通过使1,2,3,4-四氢-4-氧代咔唑脱水制备4-羟基咔唑的方法,其中反应在阮内镍作为催化剂的碱性水溶液中进行。