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公开(公告)号：US4698443A
公开(公告)日：1987-10-06
申请号：US753693
申请日：1985-07-10
IPC分类号： C07C273/18 , C07C127/24 , C07C126/08
CPC分类号： C07C273/189 , Y02P20/125
摘要： Purified biuret is recovered from mixtures containing biuret and higher molecular weight urea condensation products by contacting melts or solutions of such mixtures with a polar adsorbent and extracting biuret from the adsorbent with a polar desorbent. The useful biuret-containing mixtures also may contain urea. These methods are capable of recovering biuret of 99.9 percent plus purity from mixture containing higher molecular weight urea condensations products such as triuret, melamine, ammelide, and others. The biuret-containing desorbent can be recycled into contact with biuret-containing adsorbents to increase its biuret concentration, concentrated by evaporation of otherwise, and/or treated to crystallize biuret. An integrated process is provided which involves pyrolyzing urea to form biuret and higher molecular weight condensation products and selectively recovering biuret from the resulting pyrolyzed urea as described.
摘要翻译： 通过将这种混合物的熔体或溶液与极性吸附剂接触并用极性解吸剂从吸附剂中萃取缩二脲，从含有缩二脲和较高分子量的脲缩合产物的混合物中回收纯化的缩二脲。 有用的含缩二脲化合物的混合物还可以含有尿素。 这些方法能够从含有较高分子量尿素缩合产物的混合物（如三脲，三聚氰胺，等等）回收99.9％的纯度的缩二脲。 含缩二官能的脱附剂可以再循环到与含缩二脲的吸附剂接触以增加其缩二脲浓度，通过另外蒸发浓缩和/或处理以结晶缩二脲。 提供了一种综合方法，其包括热解尿素以形成缩二脲和较高分子量缩合产物，并如所述从所得热解脲选择性回收缩二脲。
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公开(公告)号：US4658059A
公开(公告)日：1987-04-14
申请号：US567271
申请日：1983-12-30
IPC分类号： C07C273/18 , C07C275/62 , C07C126/08
CPC分类号： C07C273/189 , C07C275/62
摘要： Methods are provided for removing biuret from biuret-containing aqueous urea solutions which methods involve contacting a quantity of a biuret-containing aqueous urea feed solution with the hydroxide ion form of an anion exchanger under conditions sufficient to remove at least a portion of the biuret from the feed solution, and regenerating the resulting biuret-containing anion exchanger, at least in part, by contact with a substantially non-alkaline aqueous regenerant under conditions sufficient to remove at least a portion of the biuret from the anion exchanger. After completion of the described contacting with the substantially non-alkaline aqueous regenerant, the anion exchanger can optionally be further regenerated by contact with an aqueous solution of a strong base to remove additional quantities of biuret and/or other anion exchanger contaminants such as alkaline earth metal and carbonate ions and/or compounds. Methods are also provided in which one or more of the aqueous process streams which contact the anion exchanger have been treated (or comprise aqueous media which have been treated) to reduce the concentration of alkaline earth metal compounds and/or carbonate in such aqueous process streams.
摘要翻译： 提供了用于从含缩二脲水溶液的尿素溶液中除去缩二脲的方法，该方法包括使一定量的含缩二脲水的尿素进料溶液与阴离子交换剂的氢氧根离子形式接触，所述条件足以将至少一部分缩二脲从 进料溶液，并且在足以从阴离子交换器除去至少一部分缩二脲的条件下至少部分地通过与基本上非碱性的水性再生剂接触来再生所得到的缩二脲包含阴离子交换剂。 在完成所述与基本上非碱性的水性再生剂的接触后，阴离子交换剂可以任选地通过与强碱的水溶液接触进一步再生，以除去附加量的缩二脲和/或其它阴离子交换剂污染物如碱土 金属和碳酸根离子和/或化合物。 还提供了一种方法，其中接触阴离子交换剂的一种或多种含水工艺物流已被处理（或包括已经处理过的含水介质）以降低这些含水工艺流中的碱土金属化合物和/或碳酸盐的浓度 。
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公开(公告)号：US4645859A
公开(公告)日：1987-02-24
申请号：US725304
申请日：1985-04-19
IPC分类号： C07C273/18 , C07C275/62 , C07C126/08
CPC分类号： C07C275/62 , C07C273/189 , Y02P20/125
摘要： Methods are provided for recovering purified biuret from aqueous solutions containing biuret and higher molecular weight urea condensation products by contacting such solutions with the hydroxide ion form of an anion exchanger and extracting biuret from the ion exchanger with an aqueous extractant. The useful biuret-containing solutions also may contain urea. These methods are capable of recovering biuret of 99.9 percent plus purity from solutions containing higher molecular weight urea condensations products such as triuret, melamine, ammelide, and others. Elevated temperatures increase biuret recovery rate and concentration, and the extractant can be recycled into contact with additional biuret-containing anion exchangers to increase biuret concentration even further. The biuret-containing extract can be employed as is, concentrated by evaporation or otherwise, or treated to crystallize biuret. An integrated process is provided which involves pyrolyzing urea to form biuret and higher molecular weight condensation products and selectively recovering biuret from an aqueous solution of the resulting pyrolyzed urea as described.
摘要翻译： 提供了用于从含有缩二脲和较高分子量的尿素缩合产物的水溶液中回收纯化的缩二脲的方法，其通过使这些溶液与阴离子交换剂的氢氧根离子形式接触并用水提取剂从离子交换剂中提取缩二脲。 有用的含缩二脲的溶液也可以含有尿素。 这些方法能够从含有较高分子量尿素缩合产物如三脲，三聚氰胺，其它的溶液的溶液中回收99.9％的纯度的缩二脲。 升高的温度增加了缩二脲的回收速率和浓度，并且萃取剂可以再循环与另外的含缩二脲的阴离子交换剂接触以进一步增加缩二脲浓度。 含缩二脲的提取物可以原样使用，通过蒸发或其它方式浓缩，或者进行处理以结晶缩二脲。 提供了一种综合方法，其包括热解尿素以形成缩二脲和较高分子量缩合产物，并如所述从所得热解脲的水溶液中选择性回收缩二脲。
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94.发明授权Method of soil nitrification inhibition by application of a stabilized fumigant composition 失效通过施用稳定的熏蒸剂组合物的土壤硝化抑制方法
公开(公告)号：US4551167A
公开(公告)日：1985-11-05
申请号：US633014
申请日：1984-07-20
CPC分类号： C05G3/0005 , A01N25/22 , A01N59/02 , A01N59/04 , A01N59/06 , C01D13/00 , Y10S71/902 , Y10S71/903
摘要： A stabilized fumigant composition comprises an aqueous solution containing up to about fifty percent by weight of a solute which comprises ammonia, hydrogen sulfide and carbon disulfide. Elemental sulfur can also be a component of the solute. One preferred composition comprises a solution wherein the molarity of hydrogen sulfide is about 1.5 times the molarity of carbon disulfide, and is about one-half the molarity of ammonia, and wherein the molarity of sulfur is about 1.6 times the molarity of carbon disulfide.The composition decomposes in a soil environment to form sources of available plant nutrients, including ammonia, hydrogen sulfide and sulfur, and carbon disulfide which inhibits nitrification and decreases the nematode population. Nutrient content can be enhanced by the addition of, for example, ammonia, ammonium nitrate, urea and mixtures thereof to the formed composition.The composition can also be decomposed by dilution or heat application, or both, to yield its components for non-soil fumigation uses.
摘要翻译： 稳定的熏蒸剂组合物包含含有至多约50重量％的包含氨，硫化氢和二硫化碳的溶质的水溶液。 元素硫也可以是溶质的成分。 一种优选的组合物包括其中硫化氢的摩尔浓度为二硫化碳的摩尔数的约1.5倍的溶液，并且其为氨的摩尔浓度的约一半，并且其中硫的摩尔浓度为二硫化碳摩尔浓度的约1.6倍。 该组合物在土壤环境中分解形成可用植物营养物质的来源，包括氨，硫化氢和硫，以及抑制硝化并降低线虫种群的二硫化碳。 通过向所形成的组合物中加入例如氨，硝酸铵，尿素及其混合物可以提高营养成分含量。 组合物也可以通过稀释或热施用或两者分解，以产生其用于非土壤熏蒸用途的组分。
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公开(公告)号：US4512813A
公开(公告)日：1985-04-23
申请号：US482942
申请日：1983-04-07
申请人： Donald C. Young
发明人： Donald C. Young
CPC分类号： B27M1/00
摘要： The monourea adduct of sulfuric acid, when combined with water, has the unique ability to ablate the surface of wooden articles without charring or otherwise disfiguring the surface of the wooden article. Thus, wooden articles can be treated to accomplish a variety of purposes by contacting the surface to be treated with a composition containing the monourea adduct of sulfuric acid. Such compositions comprise mixtures of urea and sulfuric acid in which the molar ratio of urea to sulfuric acid is within the range of 1/4 to about 7/4 so that at least about 25 percent of the sulfuric acid is present as the monourea adduct. Such treatment can be employed to modify the dimensions of the article surface, remove stains, mars or other markings, accentuate the hard grain of the article surface, emboss the surface with a predetermined pattern, or accomplish other objectives that result from generally or selectively ablating the article's surface.
摘要翻译： 当与水结合时，硫酸的单脲加合物具有独特的消融木制品表面的能力，而不会烧焦或以其它方式破坏木制品的表面。 因此，可以通过将待处理的表面与含有硫酸的单脲加成物的组合物接触来处理木制品以实现各种目的。 这种组合物包含尿素和硫酸的混合物，其中尿素与硫酸的摩尔比在1/4至约7/4的范围内，使得至少约25％的硫酸作为单脲加合物存在。 这种处理可用于改变制品表面的尺寸，去除污渍，火星或其他标记，强化制品表面的硬质颗粒，以预定图案压花表面，或完成由通常或选择性烧蚀而产生的其它目的 文章的表面。
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公开(公告)号：US4302237A
公开(公告)日：1981-11-24
申请号：US972729
申请日：1978-12-26
申请人： Donald C. Young
发明人： Donald C. Young
CPC分类号： C05D9/00 , C09K17/14 , Y10S71/903
摘要： Homogeneous sulfur-hydrocarbon blends comprising a continuous sulfur matrix containing hydrocarbon, and methods of manufacture and use are described. These materials are particularly suitable as soil supplements, for comminution, or for compounding with hydrophobic materials such as elastomers and oil-based paints. Several advantages are apparent in essentially any application involving storage or transport.
摘要翻译： 描述了包含含有烃的连续含硫基质的均相硫 - 烃共混物，以及制造和使用方法。 这些材料特别适用于土壤补充剂，粉碎或与疏水性材料如弹性体和油性涂料混合。 在基本上涉及存储或运输的任何应用中，有几个优点是显而易见的。
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公开(公告)号：US4087498A
公开(公告)日：1978-05-02
申请号：US627660
申请日：1975-10-31
申请人： Donald C. Young
发明人： Donald C. Young
CPC分类号： B01J2/06 , C01B17/0237
摘要： The relative crushing strength of porous sulfur particles formed by quenching molten sulfur in a highly turbulent zone created by the intersection of the molten sulfur stream and a high velocity water stream is controlled by controlling the temperature of the molten sulfur introduced into the turbulent zone. The hardness of the porous particles increases as sulfur temperature is increased.
摘要翻译： 通过熔融硫流和高速水流的交点产生的高湍流区骤冷熔融硫形成的多孔硫粒子的相对破碎强度通过控制引入湍流区域的熔融硫的温度来控制。 随着硫的温度升高，多孔颗粒的硬度增加。
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公开(公告)号：US4028088A
公开(公告)日：1977-06-07
申请号：US641366
申请日：1975-12-17
CPC分类号： C05C1/00
摘要： This invention relates to methods of producing multicomponent soil additives. The compositions comprise particle-form combinations of calcium sulfate and a nitrifier selected from urea, ammonium nitrate, and combinations of these, in which the nitrifier particles are coated with a layer of the reaction product of hydrated calcium sulfate and urea, ammonium nitrate, or both. This layer, in turn, contains an additional soil additive such as elemental sulfur or the major and minor plant nutrients such as phosphorus, potassium, magnesium, copper, zinc and the like. The particles are produced by reacting the particle-form nitrifier, preferably urea or ammonium nitrate prills, with hydrated calcium sulfate intimately mixed with one or more additional soil additives and a binder supplement comprising powdered urea and/or ammonium nitrate having particle sizes below 30 mesh. Reaction is promoted by heating to a temperature sufficient to initiate the endothermic reaction without melting or thermally decomposing the nitrifier.
摘要翻译： 本发明涉及生产多组分土壤添加剂的方法。 组合物包含硫酸钙和选自脲，硝酸铵及其组合的硝化物的颗粒形式组合，其中硝酸盐颗粒被水合硫酸钙和尿素的反应产物层，硝酸铵或 都。 该层又含有另外的土壤添加剂，例如元素硫或主要和次要植物营养物质，例如磷，钾，镁，铜，锌等。 颗粒通过使颗粒形式的硝化物，优选尿素或硝酸铵颗粒与与一种或多种另外的土壤添加剂密切混合的水合硫酸钙和包含粒径低于30目的粉末状尿素和/或硝酸铵的粘合剂添加剂反应而制备 。 通过加热至足以引发吸热反应而不熔化或热分解硝化物的温度促进反应。
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公开(公告)号：US4018769A
公开(公告)日：1977-04-19
申请号：US687363
申请日：1976-05-17
申请人： Donald C. Young
发明人： Donald C. Young
IPC分类号： C07D251/32 , C07D251/34 , C07D251/30
CPC分类号： C07D251/34 , C07D251/32 , Y02P20/582
摘要： Urea cyanurate is obtained by heating urea to temperatures above 190.degree. C. in the presence of catalytic amounts of elemental sulfur. Cyanuric acid is obtained by hydrolysis or pyrolysis of the urea cyanurate product.
摘要翻译： 通过在催化量的元素硫存在下，将脲加热至190℃以上，得到氰脲酸脲。 氰尿酸通过尿素氰脲酸酯产物的水解或热解得到。
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公开(公告)号：US4011300A
公开(公告)日：1977-03-08
申请号：US591056
申请日：1975-06-27
申请人： Bruce A. Harbolt , Donald C. Young
发明人： Bruce A. Harbolt , Donald C. Young
CPC分类号： C05B13/06 , C01B25/28 , C01B25/405
摘要： Phosphoric acids having H.sub.2 0/P.sub.2 O.sub.5 mole ratios of about 4.5 or less are converted to aqueous solutions of ammonium polyphosphates of which at least about 40 percent of the P.sub.2 O.sub.5 is present as acyclic polyphosphates. The reaction is conducted at 500.degree. to about 750.degree. F. sufficient to increase the polymeric P.sub.2 O.sub.5 content at least 10 percent by reacting a highly dispersed, unconfined acid spray with substantially anhydrous ammonia. High conversions to polymeric species are obtained while minimizing both reactor fouling when using impure wet-process acids, and corrosion occurring with either wet-process or "white" acids.
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