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公开(公告)号：US4534954A
公开(公告)日：1985-08-13
申请号：US585640
申请日：1984-03-08
CPC分类号： C01B17/665
摘要： Aqueous sodium dithionite slurries, which are non-settling during shipment thereof and are thereafter pumpable, and a method for their manufacture are provided. The slurries contain at least 25% by weight of crystalline pure sodium dithionite and at least about 0.13% by weight of a xanthan gum. As textile bleaching compositions, the slurries comprise, on a weight basis, at least about 36% of commercial sodium dithionite, at least about 3% of sodium hydroxide, at least about 0.25% of a chelate, and at least about 0.25% of a xanthan gum. As woodpulp bleaching compositions, the slurries comprise, on a weight basis, about 28% of commercial sodium dithionite, at least about 2% of sodium carbonate, at least about 2% of sodium tripolyphosphate, and at least about 0.13% of a xanthan gum.
摘要翻译： 水性连二亚硫酸钠浆液，其在运输过程中不沉降，然后可泵送，并提供其制造方法。 浆料含有至少25重量％的结晶纯连二亚硫酸钠和至少约0.13重量％的黄原胶。 作为纺织漂白组合物，浆料以重量计包含至少约36％的商业连二亚硫酸钠，至少约3％的氢氧化钠，至少约0.25％的螯合物和至少约0.25％的 黄原胶。 作为木浆漂白组合物，浆料以重量计包含约28％的商业连二硫酸钠，至少约2％的碳酸钠，至少约2％的三聚磷酸钠和至少约0.13％的黄原胶 。
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2.发明授权
公开(公告)号：US4503262A
公开(公告)日：1985-03-05
申请号：US520470
申请日：1983-08-04
IPC分类号： C07C409/08 , C07C179/035
CPC分类号： C07C409/08 , C07C407/00
摘要： A process is disclosed for the preparation of 2,6-dihydroisopropylnaphthalene, dihydroperoxide involving the oxidation of 2,6-diisopropylnaphthalene in the presence of a catalyst wherein the improvement comprises carrying out said oxidation in the presence of a C.sub.5 -C.sub.14 aliphatic hydrocarbon solvent.
摘要翻译： 公开了一种在催化剂存在下制备2,6-二氢异丙基萘，涉及2,6-二异丙基萘氧化的二氢过氧化物的方法，其中改进包括在C5-C14脂族烃溶剂存在下进行所述氧化。
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3.发明授权Method of preparing reproducibly stable aqueous suspensions of sodium dithionite for woodpulp bleaching 失效制备可重复稳定的连二亚硫酸钠水性悬浮液用于木浆漂白的方法
公开(公告)号：US4729886A
公开(公告)日：1988-03-08
申请号：US865092
申请日：1986-05-20
CPC分类号： C01B17/66 , D21C9/1089
摘要： Aqueous sodium dithionite slurries or suspensions, which are nonsettling during shipment thereof and are thereafter pumpable after storage at 32.degree.-40.degree. F. for at least fourteen days, comprise, on a weight basis, about 34% of sodium dithionite, about 0.17% of a xanthan gum, 5.5-6.5% of 50% sodium hydroxide, about 0.26% of a chelate, and about 1.96% of sodium tripolyphosphate which is added after adding the sodium dithionite. Preferably, the sodium tripolyphosphate is added last in making the slurry which is used as a woodpulp bleaching composition.
摘要翻译： 含水连二亚硫酸钠浆液或悬浮液在运输过程中不会沉淀，然后在32°-40°F储存至少十四天之后可泵送，包含约34％的连二亚硫酸钠，约0.17％ 的黄原胶，5.5-6.5％的50％氢氧化钠，约0.26％的螯合物和约1.96％的三聚磷酸钠，在加入连二亚硫酸钠之后加入。 优选地，在制备用作木浆漂白组合物的浆料时最后加入三聚磷酸钠。
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公开(公告)号：US3965187A
公开(公告)日：1976-06-22
申请号：US52129
申请日：1970-07-02
IPC分类号： C07C45/00
CPC分类号： C07C45/006
摘要： The catalytic hydrogenation of phenol obtained by the cumene hydroperoxide process is improved by hydrogenating high purity phenol containing not more than 75 ppm of acetol, an impurity found in phenol prepared from cumene. Acetol-free phenol is obtained by treating phenol for 1-5 minutes with a polyamine such as hexamethylene diamine, hexamethylene triamine and the like or an aqueous solution thereof, and then distilling the mixture to separate the components. Alternatively, the hydrogenability of phenol can be improved by injecting the polyamine into the reaction mixture during hydrogenation.
摘要翻译： 通过氢化含有不超过75ppm的丙酮醇的高纯度苯酚（在异丙苯制备的酚中发现的杂质），可以改善通过氢过氧化枯烯过程获得的苯酚的催化氢化。 通过用多胺如六亚甲基二胺，六亚甲基三胺等或其水溶液处理苯酚1-5分钟得到无油无苯酚，然后蒸馏该混合物以分离组分。 或者，可以通过在氢化期间将多胺注入到反应混合物中来改善苯酚的可氢化性。
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公开(公告)号：US4582510A
公开(公告)日：1986-04-15
申请号：US664851
申请日：1984-10-25
申请人： Leonard C. Ellis , Edwin D. Little
发明人： Leonard C. Ellis , Edwin D. Little
摘要： Guar and xanthan gums are used as additives to sodium dithionite aqueous solutions for enhancing the stability of such solutions when in contact with air and used for vat dyeing of textiles and bleaching. The gums are added at levels of 0.1-0.2% by wt. and preferably at 0.15% by wt. of the solution. The stability of these polymeric-containing bleaching solutions is enhanced by more than 100-200%.
摘要翻译： 瓜尔胶和黄原胶用作连二亚硫酸钠水溶液的添加剂，用于当与空气接触并用于纺织品和漂白的瓮染色时增强这些溶液的稳定性。 树胶的添加量为0.1-0.2重量％。 优选为0.15重量％。 的解决方案。 这些含聚合物漂白溶液的稳定性提高了100-200％以上。
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