专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明授权

US5024689A Nitrogen fertilizer 失效
标题翻译：氮肥
公开(公告)号：US5024689A
公开(公告)日：1991-06-18
申请号：US153594
申请日：1988-02-08
申请人： Allen R. Sutton , Richard L. Balser
发明人： Allen R. Sutton , Richard L. Balser
IPC分类号： C05C1/00 , C05C13/00 , C05G3/00
CPC分类号： C05G3/0076 , C05C1/00 , Y10S71/902
摘要： An improved aqueous nitrogen fertilizer has been developed that increases first-year nitrogen uptake efficiency to plants. It is also a nitrogen with features to minimize exposure to nitrogen loss. It is a nitrogen fertilizer consisting of urea, ammonium nitrate, dicyandiamide, ammonium thiosulfate, and a phosphate compound which is preferably an ammonium phosphate compound. This composition can contain a herbicide and/or various micro nutrients. This aqueous fertilizer solution can be applied to a field crop in a single application and is available to the growing plant throughout its growth and maturing cycle. The aqueous fertilizer composition is conveniently prepared by the addition of a slurry containing dicyandiamide, ammonium thiosulfate and the phosphate compound to a urea-ammonium nitrate solution wherein the nitrogen content has been adjusted to account for the nitrogen that will be supplied by the slurry.
摘要翻译：已经开发了改进的含氮氮肥，其提高了植物的第一年氮吸收效率。它也是一种具有最小化氮损失暴露的特征的氮。它是一种由尿素，硝酸铵，双氰胺，硫代硫酸铵和优选磷酸铵化合物的磷酸盐化合物组成的氮肥。该组合物可含有除草剂和/或各种微量营养物质。这种含水肥料溶液可以在单一应用中应用于田间作物，并且在其生长和成熟周期中可用于生长的植物。通过将含有双氰胺，硫代硫酸铵和磷酸盐化合物的浆料加入到硝酸铵 - 硝酸铵溶液中，其中氮含量已经被调整以考虑由浆料供应的氮气，方便地制备了含水肥料组合物。

2. 发明授权

US5364438A Fluid urea-containing fertilizer 失效
标题翻译：含尿素的肥料
公开(公告)号：US5364438A
公开(公告)日：1994-11-15
申请号：US151280
申请日：1993-11-12
申请人： Charles W. Weston , Lawrence A. Peacock , Willis L. Thornsberry, Jr.
发明人： Charles W. Weston , Lawrence A. Peacock , Willis L. Thornsberry, Jr.
IPC分类号： C05C1/00 , C05G3/00 , C05C9/00
CPC分类号： C05C1/00 , C05G3/0064 , Y10S71/902
摘要： An improved fluid urea-containing fertilizer composition is disclosed; the composition is essentially comprised of an aqueous solution of urea, ammonium nitrate, N-(n-butyl)thiophosphoric triamide (NBPT), dicyandiamide (DCD), and may optionally also contain a clay as a suspending agent. The fluid fertilizer composition can be applied to a field crop in a single application and will nevertheless supply sufficient nitrogen to the plants throughout their growth and maturing cycles. As a result, the improved composition increases the nitrogen uptake efficiency of plants, enhances crop yields, and minimizes the loss of nitrogen from the soil.The NBPT is incorporated into the fluid fertilizer composition by blending a concentrated solution of N-(n-butyl)thiophosphoric triamide in a solvent selected from the group consisting of liquid amides such as an N-alkyl pyrrolidone directly with an aqueous solution of urea and ammonium nitrate, optionally also containing a suspending agent and commonly referred to in the fertilizer trade as UAN; the DCD may be added to the UAN fluid as a solid, a suspension, or in dissolved form along with the NBPT.
摘要翻译：公开了一种改进的含有流体尿素的肥料组合物; 该组合物基本上由尿素，硝酸铵，N-（正丁基）硫代磷酸三酰胺（NBPT），双氰胺（DCD）的水溶液组成，并且还可任选地含有粘土作为悬浮剂。流体肥料组合物可以在单一应用中施用于田间作物，并且将在其生长和成熟周期中向植物提供足够的氮。结果，改进的组合物增加植物的氮吸收效率，增加作物产量，并最小化土壤中氮的损失。 NBPT通过将N-（正丁基）硫代磷酸三酰胺的浓缩溶液在选自由N-烷基吡咯烷酮的液体酰胺直接与尿素水溶液组成的组的溶剂中混合而并入流体肥料组合物中，硝酸铵，任选地还含有悬浮剂，在化肥贸易中通常称为硝酸铵; DCD可以与NBPT一起作为固体，悬浮液或溶解形式加入到UAN流体中。

3. 发明授权

US5236679A Removal of aluminum contamination during production of phosphoric acid 失效
标题翻译：在磷酸生产过程中去除铝污染
公开(公告)号：US5236679A
公开(公告)日：1993-08-17
申请号：US879254
申请日：1992-05-06
申请人： John W. Wen , Charles W. Weston
发明人： John W. Wen , Charles W. Weston
IPC分类号： C01B25/225
CPC分类号： C01B25/225
摘要： This invention provides a method for removing aluminum contamination from phosphoric acid during the acidulation of phosphate rock with sulfuric acid in the presence of recycled phosphoric acid. The method of this invention involves the addition of acid soluble silica to the acidulation slurry and calls for maintaining the molar ratio of non-fluosilicate fluoride (i.e. fluoride not complexed with silica) to aluminum in the liquid phase of the acidulation slurry between 2.5 and 5.0. These conditions favor the precipitation of aluminum as calcium tetrafluoaluminate dihydrate and enable the co-removal of this compound by filtration with by-product gypsum. This invention is particularily suitable for the processing of phosphate rocks with high iron and aluminum contents, such as the nonsedimentary phosphate rocks occurring in Sri Lanka.
摘要翻译：本发明提供一种在再循环磷酸存在下用硫酸酸化磷酸盐岩时，从磷酸中除去铝污染的方法。本发明的方法涉及向酸化浆料中加入酸溶性二氧化硅，并要求在酸性浆液的液相中保持2.5至5.0之间的非氟硅酸盐氟化物（即，与二氧化硅不络合的氟化物）与铝的摩尔比。这些条件有利于铝作为四氟铝酸钙二水合物的沉淀，并且能够通过用副产物石膏过滤来共同去除该化合物。本发明特别适用于加工具有高铁和铝含量的磷酸盐岩，如斯里兰卡发生的非磷酸盐岩。

4. 发明授权

US5096571A Recovery of sulfur from native ores 失效
标题翻译：从原生矿石中回收硫
公开(公告)号：US5096571A
公开(公告)日：1992-03-17
申请号：US448963
申请日：1989-12-12
申请人： James T. Womack , Tadeusz K. Wiewiorowski , Vivian C. Astley , Jesus W. Perez , Thomas A. Headington
发明人： James T. Womack , Tadeusz K. Wiewiorowski , Vivian C. Astley , Jesus W. Perez , Thomas A. Headington
IPC分类号： B03B9/00 , B03D1/02 , C01B17/06
CPC分类号： B03D1/02 , B03B9/00 , C01B17/06
摘要： A process for recovering elemental sulfur from volcanic and non-volcanic ores is disclosed. Ore is processed by crushing the ore to a coarse particle size autoclaving to separate the sulfur from the ore, mild grinding to selectively reduce the size of the liberated sulfur particles, flotation and sulfur separation/filtration steps to produce a sulfur of at least 99% purity. The process recovers at least 90% of the elemental sulfur contained in the ore. The particular crushing of the ore and selective grinding techniques for reducing sulfur particles for reducing sulfur particles size are important factors in the efficiency of the process since the grinding techniques inhibit the formation of fine gangue which is difficult to separate from the liberated sulfur.
摘要翻译：公开了从火山和非火山矿中回收元素硫的方法。矿石通过将矿石粉碎成粗粒度加压灭菌以将硫从矿石中分离出来，温和研磨以选择性地减小释放的硫颗粒的尺寸，浮选和硫分离/过滤步骤以产生至少99％的硫，纯度。该工艺回收至少90％的矿石中所含的元素硫。矿石的特别粉碎和用于还原硫颗粒以减少硫颗粒尺寸的选择性研磨技术是该方法效率的重要因素，因为研磨技术抑制难以与释放的硫分离的细ang石的形成。

5. 发明授权

US4722832A Sulfur recovery process 失效
标题翻译：硫回收过程
公开(公告)号：US4722832A
公开(公告)日：1988-02-02
申请号：US900633
申请日：1986-08-27
申请人： Charles W. Weston , John W. Wen
发明人： Charles W. Weston , John W. Wen
IPC分类号： C01B17/027 , C01B17/42 , C01B17/033
CPC分类号： C01B17/027 , C01B17/42
摘要： A process for the recovery of sulfur from sulfur-bearing ores employing an aqueous leaching solution containing calcium monosulfide, calcium hydrosulfide or mixtures of such calcium sulfide species. The sulfur ore is contacted in an extraction zone with the aqueous leaching solution under conditions to solubilize sulfur from the ore in the form of calcium polysulfide. Preferably, the extraction step is carried out at an elevated temperature. The loaded leaching solution is recovered from the extraction zone and applied to a sulfur-production zone. Here the loaded solution is contacted with hydrogen sulfide under conditions to react the hydrogen sulfide with the calcium polysulfide to produce calcium hydrosulfide and elemental sulfur. The calcium hydrosulfide solution is recycled for use as leaching solution in the sulfur extraction zone.
摘要翻译：使用含有单硫化钙，硫氢化钙或这种硫化钙物质的混合物的含水浸出溶液从含硫矿石中回收硫的方法。使硫矿石在提取区域与含水浸出溶液接触，条件是以多硫化钙的形式从矿石中溶解硫。优选地，提取步骤在升高的温度下进行。加载的浸出溶液从萃取区回收并施加到硫生产区。在这里，将负载的溶液与硫化氢接触，以使硫化氢与多硫化钙反应以产生硫氢化钙和元素硫。硫酸氢钙溶液被再循环用作硫提取区的浸出溶液。

6. 发明授权

US4704136A Sulfate reduction process useful in coal gasification 失效
标题翻译：硫酸盐还原工艺可用于煤气化
公开(公告)号：US4704136A
公开(公告)日：1987-11-03
申请号：US864281
申请日：1986-05-16
申请人： Charles W. Weston , Frederick S. Mandel
发明人： Charles W. Weston , Frederick S. Mandel
IPC分类号： C01B17/44 , C10J3/00
CPC分类号： C01B17/44 , C10J3/00 , C10J3/482 , C10J2300/0906 , C10J2300/0909 , C10J2300/093 , C10J2300/0943 , C10J2300/0946 , C10J2300/0956 , C10J2300/0959 , C10J2300/0976 , C10J2300/0996 , C10J2300/1668 , C10J2300/1807 , Y10S423/14
摘要： A carbonaceous material, such as coal, is gasified through the catalytic action of an alkali metal salt. The alkali metal is provided as a sulfate which is converted to a sulfide during gasification. In one embodiment, sodium sulfate is converted to sodium sulfide at a temperature effective to form a transitory melt condition at an interface which obtains coal gasification at relatively low temperatures and material residence times for the reaction. An alkaline earth sulfate, such as a gypsum, may be concurrently converted to a sulfide during gasification. The alkali metal sulfide may then be regenerated to a sulfate for process reuse while converting the alkaline earth to a carbonate for environmentally safe disposal with concurrent recovery of valuable sulfur. The evolved carbon gases may be used for fuel, for process feed chemicals, or the like.
摘要翻译：煤等碳质材料通过碱金属盐的催化作用而气化。碱金属以硫酸盐形式提供，在气化过程中转化为硫化物。在一个实施方案中，硫酸钠在有效形成短暂熔融条件的温度下转化为硫化钠，所述界面在相对较低的温度下获得煤气化和反应的物质停留时间。在气化期间，碱土金属硫酸盐如石膏也可以同时转化为硫化物。然后可以将碱金属硫化物再生成硫酸盐，以便过程重复使用，同时将碱土转化为碳酸盐以进行环境安全处置，同时回收有价值的硫。演化的碳气体可用于燃料，加工进料化学品等。

7. 发明授权

US5352265A Granular urea-based fertilizer 失效
标题翻译：颗粒状尿素型肥料
公开(公告)号：US5352265A
公开(公告)日：1994-10-04
申请号：US151553
申请日：1993-11-12
申请人： Charles W. Weston , Lawrence A. Peacock , Willis L. Thornsberry, Jr. , Allen R. Sutton
发明人： Charles W. Weston , Lawrence A. Peacock , Willis L. Thornsberry, Jr. , Allen R. Sutton
IPC分类号： C05C9/00
CPC分类号： C05C9/00 , Y10S71/902
摘要： An improved homogenous granular fertilizer composition is disclosed; the composition is comprised primarily of urea, N-(n-butyl)thiophosphoric triamide (NBPT), and dicyandiamide (DCD). The composition of this invention can be applied to a field crop in a single surface application and will nevertheless supply sufficient nitrogen to the plants throughout their growth and maturing cycles. The new improved composition increases the nitrogen uptake by plants, enhances crop yields, and minimizes the loss of both ammonium nitrogen and nitrate nitrogen from the soil.The NBPT is incorporated into the homogenous granular fertilizer composition of this invention by blending a concentrated solution of NBPT in a solvent selected from the group consisting of liquid amides, 2-pyrrolidone, and N-alkyl 2-pyrrolidones directly into molten urea prior to its granulation; the DCD may be added to the urea melt as a solid or in dissolved form along with the NBPT.
摘要翻译：公开了一种改进的均匀颗粒肥料组合物; 该组合物主要由尿素，N-（正丁基）硫代磷酸三酰胺（NBPT）和双氰胺（DCD）组成。本发明的组合物可以在单一表面施用中应用于田间作物，并且在其生长和成熟周期期间将向植物提供足够的氮。新的改进的组合物增加植物的氮吸收，增加作物产量，并最小化来自土壤的铵氮和硝态氮的损失。 NBPT通过将NBPT的浓缩溶液在选自液体酰胺，2-吡咯烷酮和N-烷基2-吡咯烷酮的溶剂中直接掺入到熔融尿素中之前，将NBPT掺入本发明的均匀颗粒肥料组合物中制粒 DCD可以与NBPT一起作为固体或溶解形式加入到尿素熔体中。

8. 发明授权

US5221466A Phosphate rock benefication 失效
标题翻译：磷矿石受益
公开(公告)号：US5221466A
公开(公告)日：1993-06-22
申请号：US814437
申请日：1991-12-30
申请人： Steven C. Garcia , Charles T. Staniek
发明人： Steven C. Garcia , Charles T. Staniek
IPC分类号： B03D1/002 , B03D1/02
CPC分类号： B03D1/002 , B03D1/006 , B03D1/008 , B03D1/021 , B03D2201/007 , B03D2201/06 , B03D2203/06
摘要： This invention provides an improved method for the rougher flotation of phosphate ore using sodium carbonate to control the pH at about 9.6-10.5. The method facilitates improved recovery of phosphate from its ore; in addition the Bone Phosphate of Lime (BPL) of the phosphate concentrate increases, which provides further advantages in that subsequent steps are improved by virtue of receiving a feed of greater purity. There are also certain environmental advantages obtained when ammonia is replaced with sodium carbonate and the operational safety of the flotation system is enhanced when ammonia is replaced with sodium carbonate.
摘要翻译：本发明提供了使用碳酸钠粗调浮选磷酸盐矿石以控制pH为约9.6-10.5的改进方法。该方法有助于从矿石中提高磷酸盐的回收率; 此外，磷酸盐浓缩物的磷酸骨磷酸盐（BPL）增加，这提供了进一步的优点，因为随后的步骤由于接收更高纯度的饲料而得到改善。当用碳酸钠代替氨时，还有一定的环境优势，当用碳酸钠代替氨时浮选系统的操作安全性得到提高。

9. 发明授权

US5114699A Spent alkylation acid treatment process 失效
标题翻译：废烷基化酸处理工艺
公开(公告)号：US5114699A
公开(公告)日：1992-05-19
申请号：US336791
申请日：1989-04-12
申请人： Tadeusz K. Wiewiorowski , Vivian C. Astley , Jody J. Taravella , Michael A. Murray
发明人： Tadeusz K. Wiewiorowski , Vivian C. Astley , Jody J. Taravella , Michael A. Murray
IPC分类号： B01J39/24 , C01B17/58 , C01B17/90 , C01B17/92 , C01B25/222
CPC分类号： C01B25/222 , B01J39/24 , C01B17/58 , C01B17/905 , C01B17/92
摘要： An improved process for treating spent alkylation acid to recover a sulfuric acid product suitable for use in wet process phosphoric plants particularly those which recover uranium as a byproduct. The process utilizes heat and agitation to polymerize the liquid, soluble organic impurities normally contained in spent alkylation acid to insoluble, carbonaceous solids. The carbonaceous solids formed are relatively inert in acidic environments, easy to handle and have valuable cation exchange and impurity scavenging properties.
摘要翻译：一种用于处理废烷基化酸以回收适用于湿法磷酸装置的硫酸产品的改进方法，特别是那些回收铀作为副产物的硫酸产品。该方法利用热和搅动使液体，废烷基化酸中通常含有的可溶性有机杂质聚合成不溶性碳质固体。形成的碳质固体在酸性环境中相对惰性，易于处理，具有有价值的阳离子交换和杂质清除性能。

10. 发明授权

US5261957A Phosphogypsum composition having improved expansion properties 失效
标题翻译：磷石膏组合物具有改善的膨胀性能
公开(公告)号：US5261957A
公开(公告)日：1993-11-16
申请号：US861134
申请日：1992-03-31
申请人： Willis L. Thornsberry, Jr. , James T. Houston
发明人： Willis L. Thornsberry, Jr. , James T. Houston
IPC分类号： C04B18/04 , C04B22/14 , C04B7/04 , C04B11/26
CPC分类号： C04B22/144 , C04B18/0445 , Y02W30/91
摘要： Stabilized phosphogypsum-containing compositions with low expansion and high compressive strength characteristics are prepared by admixing phosphogypsum with a cementitious binder having a calculated zero percent tricalcium aluminate content The compositions may contain phosphogypsum and cementitious binder only or they may also include sand or other filler material. The phosphogypsum composition is wetted with water, compacted and allowed to cure. The amount of water added preferably produces a maximum density of the compacted composition.
摘要翻译：具有低膨胀和高抗压强度特性的稳定的含磷石膏的组合物通过将磷石膏与具有计算的零百分比的铝酸钙含量的水泥基粘合剂混合来制备。该组合物可以仅含有磷石膏和水泥粘合剂，或者也可以包括砂或其它填料。磷石膏组合物用水润湿，压实并固化。加入的水的量优选地产生压实组合物的最大密度。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式