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公开(公告)号：US4328366A
公开(公告)日：1982-05-04
申请号：US124650
申请日：1980-02-25
摘要： This invention provides a process for recovery of sodium formate from an aqueous waste stream which is a byproduct mother liquor derived from a reaction system in which pentaerythritol is produced by the reaction of formaldehyde with acetaldehyde in the presence of sodium hydroxide catalyst.As one of its important features, the invention process involves contacting the mother liquor with a monoalkylamine solvent which is highly selective for extraction of organic materials to the exclusion of sodium formate.
摘要翻译： 本发明提供了一种从废水流中回收甲酸钠的方法，该废水是从氢氧化钠催化剂存在下通过甲醛与乙醛的反应生成季戊四醇的副产物母液。 作为其重要特征之一，本发明方法包括使母液与单烷基胺溶剂接触，所述单烷基胺溶剂对于萃取有机材料至排除甲酸钠是高选择性的。
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公开(公告)号：US3985674A
公开(公告)日：1976-10-12
申请号：US531290
申请日：1974-12-10
申请人： Leonard C. Ellis , Mearl A. Kise
发明人： Leonard C. Ellis , Mearl A. Kise
CPC分类号： C01B17/665 , D21C9/1089
摘要： Sodium dithionite bleaching solutions for groundwood pulps which require no additional chemicals for pH adjustment prior to direct application to the pulps, based on zinc-derived or formate-derived sodium dithionite and containing small percentages of at least four additives selected from the following: a chelating agent, zinc dithionite, zinc sulfate, sodium carbonate, sodium hydroxide, sodium tripolyphosphate, sodium phosphate, and sodium metaborate. Tested chelating agents are nitrilotriacetic acid (NTA) trisodium salt and ethylenediaminetetraacetic acid (EDTA) tetrasodium salt. The solutions are cool-stable (50.degree.F. or 10.degree.C) for at least 5 days with less than 5% decomposition of the sodium dithionite, and several exhibit similar stability at storage temperatures of 70.degree.-75.degree.F. (21.degree.-24.degree.C.) A method of preparation of the solutions is also provided. Bleaching performance was proved in laboratory and field trials to be comparable to the performance of solutions prepared from dry, commercially available sodium dithionite blends or commercial zinc dithionite when compared on a basis of pounds of bleaching agent per ton of pulp per point brightness gain.
摘要翻译： 用于磨木浆的连二亚硫酸钠漂白溶液，其不需要额外的化学品用于在直接施用于纸浆之前进行pH调节，基于来自锌的或甲酸酯衍生的连二亚硫酸钠并且含有少量至少四种选自以下的添加剂：螯合剂 试剂，连二亚硫酸锌，硫酸锌，碳酸钠，氢氧化钠，三聚磷酸钠，磷酸钠和偏硼酸钠。 测试的螯合剂是次氮基三乙酸（NTA）三钠盐和乙二胺四乙酸（EDTA）四钠盐。 溶液是冷稳定（50°F或10℃）至少5天，连二亚硫酸钠分解少于5％，几个在70°-75°F的储存温度下表现出相似的稳定性（21 DEG-24℃）也提供了制备溶液的方法。 在实验室和现场试验中证明了漂白性能可以与从干燥的市售的连二亚硫酸钠混合物或商业的连二亚硫酸锌制备的溶液的性能相当，当基于每磅纸浆每磅亮度增益的漂白剂的磅数进行比较时。
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3.发明授权Method for re-use of aqueous co-product from manufacture of sodium dithionite 失效从连二亚硫酸钠生产中重复使用含水副产物的方法
公开(公告)号：US5283046A
公开(公告)日：1994-02-01
申请号：US613935
申请日：1990-11-14
IPC分类号： C01B17/66
CPC分类号： C01B17/66
摘要： Aqueous co-product, produced by distillation of reaction filtrate from a batch reaction for manufacturing sodium dithionite by reacting sodium formate, sodium hydroxide, and sulfur dioxide in aqueous methanol solution, is rapidly evaporated to remove about 80% of its water content, so that only the determined quantity of water remains with its determined contents of alkali metal compounds, and is utilized as an admixed component of a succeeding batch.
摘要翻译： 通过从甲醇溶液中甲酸钠，氢氧化钠和二氧化硫反应制备连二亚硫酸钠的分批反应蒸馏反应滤液产生的水性共同产物被快速蒸发以除去其水含量的约80％，从而 只有确定量的水保持其确定的碱金属化合物的含量，并且用作后续批料的混合组分。
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公开(公告)号：US4288402A
公开(公告)日：1981-09-08
申请号：US33240
申请日：1979-04-25
申请人： Leonard C. Ellis
发明人： Leonard C. Ellis
IPC分类号： G01N33/28
CPC分类号： G01N33/2876
摘要： A field test kit which uses a single vial is useful in testing acidity in refrigeration oils contaminated with a colored leak detector. This vial contains a pre-measured indicator solution and has sufficient additional volume that the test oil can be added directly to the indicator solution and accurately measured within the vial. After shaking, the mixture quickly separates into two phases. The color of the bottom phase indicates whether or not the acidity of the refrigeration oil exceeds 0.05 acid number.
摘要翻译： 使用单个小瓶的现场测试试剂盒可用于测试被彩色检漏仪污染的制冷油中的酸度。 该小瓶含有预先测量的指示剂溶液，并具有足够的额外体积，可将测试油直接加入到指示剂溶液中并在小瓶内精确测量。 摇动后，混合物迅速分离成两相。 底部的颜色表示冷冻机油的酸度是否超过0.05酸值。
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公开(公告)号：US4283303A
公开(公告)日：1981-08-11
申请号：US156744
申请日：1980-06-05
申请人： Leonard C. Ellis
发明人： Leonard C. Ellis
IPC分类号： C01B17/66
CPC分类号： C01B17/665
摘要： Substantially stable slurries containing 30-35% by weight of sodium dithionite are manufactured by evaporating sodium dithionite solutions while maintaining the heating medium at 220.degree.-250.degree. F. and the solution and slurry at 110.degree.-155.degree. F. under a vacuum of at least 25 inches Hg and by promptly cooling the resultant slurry while agitating it. The vacuum is preferably 26.5-27.5 in. Hg. At 4-5% by weight of the sodium dithionite and preferably at 4.3% by weight, NaOH is preferably added to the solution or alternatively to the slurry, immediately after evaporation. A chelator is preferably added to the solution to prevent metal contamination thereof. Zinc-derived sodiation liquor is the preferred sodium dithionite solution.
摘要翻译： 通过蒸发连二亚硫酸钠溶液，同时将加热介质保持在220-250°F，并将溶液和浆液在110〜-155°F的真空度下，制备含有30-35重量％连二亚硫酸钠的基本稳定的浆料 至少25英寸汞柱，并迅速冷却得到的浆料同时搅拌它。 真空度优选为26.5-27.5英寸汞柱。 在4-5％重量的连二亚硫酸钠中，优选为4.3％（重量），优选在蒸发之后立即向溶液中加入NaOH或者与浆料一起加入。 优选向溶液中加入螯合剂以防止其金属污染。 锌源溶液是优选的连二亚硫酸钠溶液。
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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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