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61. 发明申请

US20160376230A1 UREA GRANULATION PROCESS WITH SCRUBBING SYSTEM 有权
标题翻译：具有冲洗系统的尿素造粒工艺
公开(公告)号：US20160376230A1
公开(公告)日：2016-12-29
申请号：US15260018
申请日：2016-09-08
申请人： UHDE FERTILIZER TECHNOLOGY B.V.
发明人： Matthias POTTHOFF , Harald FRANZRAHE , Luc Albert VANMARCKE
IPC分类号： C07C273/16 , B01J2/00 , B01D53/73 , B01D53/58 , B01D1/00
CPC分类号： C07C273/16 , B01D1/00 , B01D53/58 , B01D53/73 , B01D2258/02 , B01J2/00 , C05C9/005 , C05C9/02 , C07C273/02 , Y02A50/2346
摘要： A urea granulation process with a scrubbing system may involve at least one gaseous waste stream for removal of dust and ammonia whereby the waste stream may be processed through a combination of process steps. In some examples, the process steps may involve washing the dust and ammonia laden stream with water and/or an aqueous urea solution whereby a dust-laden liquid stream and a dust-reduced stream is generated. The process steps may further involve reacting the dust-reduced stream with formaldehyde to form a stream comprising hexamethylenetetramine and urea-formaldehyde and clean off-gas. In some cases, the gas stream may be directed first through the washing step and then through the reacting step.
摘要翻译：具有洗涤系统的尿素造粒方法可以包括用于去除灰尘和氨的至少一种气体废物流，由此可以通过工艺步骤的组合来处理废物流。在一些实例中，工艺步骤可以包括用水和/或尿素水溶液洗涤灰尘和载氨的流，从而产生载有灰尘的液体流和减少灰尘的流。工艺步骤还可以包括使减尘流与甲醛反应以形成包含六亚甲基四胺和脲甲醛的流和清洁废气。在一些情况下，气流可以先通过洗涤步骤然后通过反应步骤。

62. 发明授权

US09464009B2 Removal of urea and ammonia from exhaust gases 有权
标题翻译：从废气中去除尿素和氨
公开(公告)号：US09464009B2
公开(公告)日：2016-10-11
申请号：US13496192
申请日：2010-08-10
申请人： Jozef Hubert Meessen , Pantelis Orfanidis
发明人： Jozef Hubert Meessen , Pantelis Orfanidis
IPC分类号： B01D47/00 , C05C9/00 , C01C1/12 , C05C3/00 , C07C273/16
CPC分类号： C05C3/00 , B01D53/54 , B01D53/58 , B01D53/80 , B01D2251/506 , B01D2257/406 , B01D2257/70 , C01C1/12 , C01C1/22 , C05C3/005 , C05C9/00 , C07C273/16
摘要： The invention relates to a method for recovery of urea dust and ammonia from a gas stream by contacting said gas stream with an aqueous sulphuric acid solution, thus forming an acid solution of ammonium sulphate and urea, characterized in that the acid solution is concentrated to a melt comprising less than 5 wt % of water, which melt is subsequently transferred into solid particles comprising urea and ammonium sulphate.
摘要翻译：本发明涉及通过使所述气流与硫酸水溶液接触从气流中回收尿素灰尘和氨的方法，从而形成硫酸铵和尿素的酸溶液，其特征在于将酸溶液浓缩至熔体包含少于5重量％的水，该熔体随后转移到包含尿素和硫酸铵的固体颗粒中。

63. 发明申请

US20160024423A1 RECOVERING UREA AND OIL FROM A UREA/OIL COMPLEX 有权
标题翻译：从尿素/油复合物中回收尿素和油
公开(公告)号：US20160024423A1
公开(公告)日：2016-01-28
申请号：US14774870
申请日：2014-03-13
申请人： DSM NUTRITIONAL PRODUCTS AG
发明人： Weijie WANG , Paul Frederick MUGFORD , Theophilus Cornelus Van Den Heuvel
IPC分类号： C11B7/00 , C07C273/02 , C07C273/16
CPC分类号： C07C273/16 , C07C273/02 , C11B3/006 , C11B7/0025 , C11B7/0083
摘要： Disclosed are methods of recovering urea from a urea/oil complex by drying the complex, combining the complex with water to form a urea solution, and removing water from the urea solution. Methods for recycling the urea in urea complexation processes are also disclosed. Also disclosed are methods of recovering polyunsaturated fatty acids or derivatives thereof from the urea/oil complexes.
摘要翻译：公开了通过干燥复合物从尿素/油复合物中回收尿素的方法，将络合物与水结合形成尿素溶液，并从尿素溶液中除去水分。还公开了在尿素络合过程中再循环尿素的方法。还公开了从尿素/油配合物中回收多不饱和脂肪酸或其衍生物的方法。

64. 发明授权

US08779210B2 Process for the treatment of an aqueous mixture comprising a dipolar aprotic compound 失效
标题翻译：用于处理包含偶极非质子化合物的含水混合物的方法
公开(公告)号：US08779210B2
公开(公告)日：2014-07-15
申请号：US13451120
申请日：2012-04-19
申请人： Jochen Stangl
发明人： Jochen Stangl
IPC分类号： C07C273/16 , C07F9/50
CPC分类号： C07C273/189 , B01D15/00 , B01J20/261 , B01J20/267 , B01J20/34 , C07C315/06 , C07F9/22 , C07C275/06 , C07C317/04
摘要： Processes for the treatment of an aqueous mixture comprising a dipolar aprotic compound, comprise: a) an adsorption step, in which the aqueous mixture is brought into contact with a porous adsorbent, whereby the porous adsorbent is chosen such that the dipolar aprotic compound adsorbs to it more readily than water; b) a desorption step, in which the porous adsorbent is brought into contact with a desorbing agent, whereby a recovery solution is formed comprising the desorbing agent and the dipolar aprotic compound.
摘要翻译：用于处理包含偶极非质子化合物的含水混合物的方法包括：a）吸附步骤，其中使含水混合物与多孔吸附剂接触，由此选择多孔吸附剂使得偶极非质子化合物吸附至它比水更容易; b）解吸步骤，其中使多孔吸附剂与解吸剂接触，由此形成包含解吸剂和偶极非质子性化合物的回收溶液。

65. 发明授权

US5744009A Method and apparatus for recovering condensables in vapor from a urea vacuum evaporator 失效
标题翻译：从尿素真空蒸发器中回收蒸气中的可冷凝物的方法和装置
公开(公告)号：US5744009A
公开(公告)日：1998-04-28
申请号：US499510
申请日：1995-07-07
申请人： Vishnu Deo Singh , Richard Bruce Strait , Thomas Anthony Czuppon
发明人： Vishnu Deo Singh , Richard Bruce Strait , Thomas Anthony Czuppon
IPC分类号： C07C273/04 , C07C273/16 , C07C275/02 , B01D1/28 , B01D3/10
CPC分类号： C07C273/16 , Y10S159/16 , Y10S203/16
摘要： An improved urea recovery process is presented. In the improved process, multiple vacuum rated surface condensers used to condense water vapor evolved during urea vacuum evaporation/concentration are replaced by a direct contact cooler/absorber to obtain substantial capital and utility cost savings. Improved heat exchange efficiency of the present process significantly reduces cooling water usage in comparison to the surface condensers.
摘要翻译：提出了一种改进的尿素回收方法。在改进的过程中，用于冷凝在尿素真空蒸发/浓缩期间产生的水蒸汽的多个真空额定表面冷凝器被直接接触冷却器/吸收器代替，以获得大量的资本和公用事业成本的节省。与表面冷凝器相比，本方法的改进的热交换效率显着降低了冷却水的使用。

66. 发明授权

US5597454A Process for producing urea 失效
标题翻译：生产尿素的方法
公开(公告)号：US5597454A
公开(公告)日：1997-01-28
申请号：US418089
申请日：1995-04-06
申请人： Jing M. Lee
发明人： Jing M. Lee
IPC分类号： B01D3/34 , B01D3/38 , C07C273/04 , B01D3/00 , C07C273/16
CPC分类号： B01D3/34 , B01D3/38 , C07C273/04 , Y02P20/124 , Y02P20/57
摘要： A urea production process combining lower pressure urea concentration and carbamate recovery steps into a single non-vacuum operation. Following high pressure stripping wherein a bulk of unreacted carbamate is recovered from the reaction effluent, remaining carbamate is stripped by heated air at atmospheric pressure wherein urea is concurrently concentrated without the use of vacuum evaporators. Weak carbamate solution subsequently formed is stripped of water (and residual urea is hydrolyzed) using air and steam at a medium pressure single tower hydrolyzer/stripper to obtain a concentrated carbamate stream suitable for recycle to the reactor. The process employs heat integration for enhanced energy efficiency and produces a good quality aqueous condensate suitable for direct use as boiler feed water. Thus the aqueous condensate produced requires no additional cooling and ammonia treatment. The process employs simplified and reduced process unit operation to eliminate equipment for cost reduction.
摘要翻译：将低压尿素浓度和氨基甲酸酯回收步骤组合成单一非真空操作的尿素生产方法。在高压汽提之后，从反应流出物中回收大量未反应的氨基甲酸酯，剩余的氨基甲酸酯在大气压下被加热的空气汽提，其中尿素同时浓缩而不使用真空蒸发器。使用空气和蒸汽在中压单塔水解器/汽提器上将随后形成的弱氨基甲酸酯溶液除去水（和残留的尿素水解），得到适于再循环至反应器的浓氨基甲酸酯流。该方法采用热集成来提高能源效率，并产生适合直接用作锅炉给水的优质水凝胶。因此，产生的水凝胶不需要额外的冷却和氨处理。该过程采用简化和简化的过程单元操作，以消除设备降低成本。

67. 发明授权

US5446200A Process for the purification of technical-grade N-alkyl urea 失效
标题翻译：工业级N-烷基脲的纯化方法
公开(公告)号：US5446200A
公开(公告)日：1995-08-29
申请号：US996614
申请日：1992-12-24
申请人： Angelo Bordin
发明人： Angelo Bordin
IPC分类号： C07C273/18 , C07C275/06 , C07C273/16
CPC分类号： C07C273/189
摘要： A process for the purification of technical-grade N-alkyl urea, particularly mono-ethyl urea, including an alkali metal sulphate, characterised in that it includes the steps of:treating the technical alkyl urea with a C.sub.1 -C.sub.4 alcoholic solvent to cause the selective dissolution of the alkyl urea,separating the soluble fraction from the alkali metal sulphate which is insoluble in the alcoholic solvent, andremoving the alcoholic solvent from the soluble fraction to recover the N-alkyl urea.
摘要翻译：一种用于纯化工业级N-烷基脲，特别是单乙基脲（包括碱金属硫酸盐）的方法，其特征在于其包括以下步骤：用C1-C4醇溶剂处理工业烷基脲以使选择性溶解烷基尿素，将可溶部分与不溶于醇溶剂的碱金属硫酸盐分离，并从可溶部分除去醇溶剂以回收N-烷基脲。

68. 发明授权

US5273623A Process for concentrating urea solution under vacuum 失效
标题翻译：在真空下浓缩尿素溶液的方法
公开(公告)号：US5273623A
公开(公告)日：1993-12-28
申请号：US687116
申请日：1991-04-18
申请人： Franco Granelli
发明人： Franco Granelli
IPC分类号： B01D3/38 , C05C9/00 , C07C273/16 , B01D1/00
CPC分类号： B01D3/38 , C05C9/005 , C07C273/16 , Y10S159/16 , Y10S203/13
摘要： Process for vacuum-concentrating urea solutions in which the final step of evaporation of the urea solution under vacuum is carried out within the injection of overheated water vapor in the overhead portion of the concentrator, in order to counteract the formation and deposition of high-melting, fouling compounds derived from urea.

69. 发明授权

US5223238A Method for treating ammonia and urea condensates 失效
标题翻译：氨和尿素缩合物的处理方法
公开(公告)号：US5223238A
公开(公告)日：1993-06-29
申请号：US821209
申请日：1992-01-16
申请人： Thomas A. Czuppon
发明人： Thomas A. Czuppon
IPC分类号： C01C1/02 , C01B3/02 , C01C1/04 , C01C1/10 , C01C1/12 , C07C273/08 , C07C273/10 , C07C273/16 , C07C275/00
CPC分类号： C01C1/0488 , C01B3/025 , C01C1/10 , C07C273/10 , Y02P20/52
摘要： A method is described which enables ammonia plant process condensate contaminated with ammonia, carbon dioxide and methanol and urea plant condensate contaminated with urea, ammonia, carbon dioxide and other combined forms of ammonia and carbon dioxide to be simultaneously converted, in a single treatment vessel, substantially and continuously to a vaporous stream rich in ammonia, carbon dioxide and methanol and an liquid stream poor in ammonia, carbon dioxide, methanol and urea. The vaporous stream thus produced is recycled and employed as a feedstock in the reforming section in the ammonia plant.
摘要翻译：描述了一种方法，其使得能够在单个处理容器中同时转化被氨，二氧化碳和甲醇以及尿素，氨，二氧化碳和其他组合形式的氨和二氧化碳污染的氨厂处理冷凝物，基本上和连续地添加到富含氨，二氧化碳和甲醇的蒸气流以及氨，二氧化碳，甲醇和尿素中的液体流。如此生产的蒸汽流被再循环并用作氨装置中的重整段中的原料。

70. 发明授权

US4701555A Methods for removing biuret from urea by adsorption 失效
标题翻译：通过吸附从尿素中除去缩二脲的方法
公开(公告)号：US4701555A
公开(公告)日：1987-10-20
申请号：US753692
申请日：1985-07-10
申请人： Donald C. Young , James A. Green, II
发明人： Donald C. Young , James A. Green, II
IPC分类号： C07C273/16 , C07C127/24 , C07C126/08
CPC分类号： C07C273/16
摘要： The biuret content of biuret-containing urea is reduced by contacting a solution or melt of biuret-containing urea with a polar adsorbent under conditions sufficient to remove at least a portion of biuret from the urea. The resulting biuret-containing adsorbent can be regenerated for further use by contact with a polar desorbent under conditions sufficient to desorb at least a portion of the biuret contained on the adsorbent. Optionally, biuret can be recovered by recovering the biuret-containing desorbent, and biuret concentration in the desorbent can be increased by recycling the biuret-containing desorbent into contact with biuret-containing adsorbents, and biuret can be recovered from the desorbent by low temperature crystallization.
摘要翻译：通过在足以从尿素除去至少一部分缩二脲的条件下使含缩二脲的脲与极性吸附剂的溶液或熔体接触来降低缩二脲含脲的缩二脲含量。所得到的含缩二脲合金的吸附剂可以在足以解吸吸附剂上所含的至少一部分缩二脲的条件下与极性解吸剂接触来再生再进一步使用。任选地，可以通过回收含缩二脲的解吸剂来回收缩二脲，并且可以通过将含缩二脲的解吸剂再循环到与含缩二脲的吸附剂接触来提高解吸剂中的缩二脲浓度，并且可以通过低温结晶从解吸剂中回收缩二脲。

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