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公开(公告)号：US11834343B2
公开(公告)日：2023-12-05
申请号：US17097655
申请日：2020-11-13
申请人： Riley Davis Robbins
发明人： Riley Davis Robbins
摘要： The disclosed technology includes a method for producing ultrafine alumina from salt slag waste generated in aluminum recycling useful in the manufacture of durable ceramic products; a system for recovering alumina from salt slag waste; a method and systems for recovering salts, aluminum and alumina from salt slag waste; and a method and systems of capturing ammonia in a process recovering salts, aluminum and alumina from salt slag waste. The methods and systems provided crush the dry particles of the salt slag waste, scrub the slag with water, and with steam and by means of a vented alumina press, dewater the scrubbed slag particles. In some methods and systems of the disclosed technology, the particles of the pressed alumina cake are further reduced. In some methods and systems, the salt in the salt effluent is crystalized. In some methods and systems of the disclosed technology, the ammonia is contained and captured.
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公开(公告)号：US11180447B2
公开(公告)日：2021-11-23
申请号：US16771892
申请日：2018-12-12
IPC分类号： C07C319/20 , C07C319/28 , C07C323/58 , B01D19/00 , C01C1/12
摘要： An object of the present invention to provide a method for producing methionine with consideration given to the environment. The production method of the present invention comprises a removal step of blowing an inert gas into a liquid containing 5-(2-methylmercaptoethyl)hydantoin and thereby diffusing ammonia remaining in the liquid to obtain an emission gas containing the ammonia, and a recovery step of bringing the emission gas into contact with a washing liquid to recover ammonia contained in the emission gas.
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公开(公告)号：US10022650B2
公开(公告)日：2018-07-17
申请号：US15123546
申请日：2015-03-05
发明人： Martin Taylor , Charles Kimtantas
IPC分类号： C01C1/12 , C01C1/02 , C01C1/10 , B01D53/14 , B01D53/73 , B01D53/96 , C02F1/20 , B01D19/00 , C02F103/36
摘要： Systems and methods for enhanced separation of H2S and NH3 in an H2S stripper using carbon dioxide and/or an inert gas.
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公开(公告)号：US20180105419A1
公开(公告)日：2018-04-19
申请号：US15782158
申请日：2017-10-12
发明人： Daniel BIRKE
CPC分类号： C01B21/38 , B01D53/00 , B01D53/8625 , B01J7/00 , C01B21/262 , C01B21/28 , C01C1/12 , C02F1/04
摘要： A process for preparing nitric acid may involve vaporizing ammonia in at least one first ammonia vaporizer to produce an ammonia gas, oxidizing this ammonia gas to nitrogen dioxide in a plant section of a nitric acid plant, and absorbing the nitrogen dioxide in water to produce nitric acid. A residual gas containing nitrous gases may be taken off from the plant section of the nitric acid plant and conveyed to a residual-gas cleaning apparatus. The residual gas containing nitrous gases may be reduced by means of ammonia in the residual-gas cleaning apparatus, wherein ammonia-containing wastewater obtained in the at least one first ammonia vaporizer may be conveyed to the residual-gas cleaning apparatus. Such a process may eliminate or at least substantially reduce ammonia-containing wastewater. Furthermore, a plant can be used in this process for preparing nitric acid.
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公开(公告)号：US20150183649A1
公开(公告)日：2015-07-02
申请号：US14415170
申请日：2013-06-24
发明人： Thomas A. Micka , Martin J. Renner
CPC分类号： C01C1/02 , B01D53/14 , B01D53/1425 , B01D53/58 , B01D53/96 , B01D2251/61 , B01D2257/406 , C01C1/12 , C01C3/0212 , C01C3/022
摘要： The present invention relates to reduction of corrosion. The present invention includes a method of decreasing corrosion during ammonia extraction. The method includes performing a process to extract ammonia using ammonia extraction equipment. The ammonia extraction equipment includes an ammonia absorber, an ammonia desorber, and an aqueous solution. The aqueous solution includes an acid or an ammonium salt thereof. The method also includes purging at least part of the aqueous solution. The purged part of the aqueous solution includes at least one corrosion-promoting ion. The method also includes adding a replacement aqueous solution to the aqueous solution. The replacement aqueous solution has a reduced concentration of the at least one corrosion-promoting ion as compared to the purged part of the aqueous solution. The invention also provides a system that can perform the method.
摘要翻译： 本发明涉及减少腐蚀。 本发明包括在氨提取期间减少腐蚀的方法。 该方法包括执行使用氨提取设备提取氨的方法。 氨提取设备包括氨吸收器，氨解吸器和水溶液。 水溶液包含酸或其铵盐。 该方法还包括清洗至少部分水溶液。 水溶液的吹扫部分包括至少一种腐蚀促进离子。 该方法还包括向水溶液中加入替代水溶液。 与水溶液的清洗部分相比，替代水溶液的至少一种腐蚀促进离子的浓度降低。 本发明还提供一种可以执行该方法的系统。
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6.发明授权公开(公告)号：US08889090B2
公开(公告)日：2014-11-18
申请号：US13901684
申请日：2013-05-24
发明人： Kansei Izaki , Masanori Iwaki , Toshio Akiyama
CPC分类号： F25J3/08 , C01C1/12 , Y02P20/129 , Y10S438/905
摘要： There are provided methods capable of easily and efficiently recovering and recycling ammonia from exhaust gas containing a small amount of ammonia, the exhaust gas being exhausted from a production process of a gallium nitride compound semiconductor. The method of recovering ammonia includes filtering exhaust gas containing ammonia, hydrogen, nitrogen, and a solid compound with a filter to remove the solid compound from the exhaust gas; pressurizing and cooling the filtered exhaust gas with a heat pump to liquefy ammonia contained in the filtered exhaust gas; and separating liquefied ammonia from hydrogen and nitrogen to recover liquefied ammonia. The method of recycling ammonia includes evaporating recovered liquid ammonia; mixing the evaporated ammonia with another crude ammonia to obtain mixed gas; purifying the mixed gas; and supplying the purified gas to the production process of a gallium nitride compound semiconductor.
摘要翻译： 提供了能够容易且有效地从含有少量氨的废气中回收和回收氨的方法，废气从氮化镓化合物半导体的生产过程中排出。 回收氨的方法包括用过滤器过滤含有氨，氢，氮和固体化合物的废气以从废气中除去固体化合物; 用热泵对过滤的废气进行加压和冷却，以液化所含过滤废气中的氨; 并将液氨与氢气和氮气分离，回收液氨。 回收氨的方法包括蒸发回收的液氨; 将蒸发的氨与另一种粗氨混合以获得混合气体; 净化混合气体; 并将净化气体供给到氮化镓系化合物半导体的制造工序中。
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公开(公告)号：US20130011321A1
公开(公告)日：2013-01-10
申请号：US13543693
申请日：2012-07-06
申请人： HSUEH YUAN LEE , Ding Chung LIOU
发明人： HSUEH YUAN LEE , Ding Chung LIOU
CPC分类号： B01D53/145 , B01D53/1418 , B01D53/58 , B01D2251/512 , B01D2252/103 , B01D2257/406 , B01D2258/0216 , C01C1/12 , Y02A50/2346 , Y02P20/129
摘要： An exhaust gas treatment apparatus comprises an ammonia absorption system and an ammonia conversion system. The ammonia absorption receives ammonia-containing tail gas generated by a semiconductor process, and removes dust from the tail gas, absorbs and decomposes ammonia gas from the tail gas, converts the ammonia gas into aqueous ammonia, and emits the tail gas without the dust and the ammonia to an external environment. The ammonia conversion system receives the ammonia solution from the ammonia absorption system, and converts it into gaseous ammonia, and then converts the gaseous ammonia to produce liquid ammonia by vaporization and cooling-pressurized liquefaction. After that, the liquid ammonia is purified by a purification system to formed hi-purity liquid ammonia.
摘要翻译： 废气处理装置包括氨吸收系统和氨转化系统。 氨吸收接收由半导体工艺产生的含氨尾气，从尾气除去灰尘，从尾气中吸收和分解氨气，将氨气转化为氨水，并排出尾气，无灰尘和 氨到外部环境。 氨转化系统从氨吸收系统接收氨溶液，并将其转化为气态氨，然后通过汽化和冷却加压液化转化气氨以产生液氨。 之后，通过净化系统对液氨进行纯化以形成高纯液氨。
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8.发明授权公开(公告)号：US07377965B2
公开(公告)日：2008-05-27
申请号：US11156511
申请日：2005-06-20
CPC分类号： B01D53/02 , B01D2253/106 , B01D2255/20761 , B01J20/103 , B01J20/28057 , B01J20/28071 , B01J20/28073 , B01J20/3236
摘要： The present invention relates generally to an environmental control unit for use in air handling systems that provides highly effective filtration of noxious gases (such as ammonia). Such a filtration system utilizes novel metal-doped silica-based gels to trap and remove such undesirable gases from an enclosed environment. Such gels exhibit specific porosity requirements and density measurements. Furthermore, in order for proper metal doping to take effect, such gels must be treated while in a wet state. The combination of these particular properties and metal dopant permits highly effective noxious gas filtration such that uptake and breakthrough results are attained, particularly in comparison with prior silica gel filtration products. Methods of using and specific filter apparatuses are also encompassed within this invention.
摘要翻译： 本发明一般涉及一种用于空气处理系统的环境控制单元，其提供对有害气体（例如氨）的高效过滤。 这种过滤系统利用新颖的金属掺杂的二氧化硅基凝胶来从封闭的环境中捕集和去除这些不期望的气体。 这种凝胶表现出特定的孔隙率要求和密度测量。 此外，为了适当的金属掺杂生效，这种凝胶必须在潮湿状态下进行处理。 这些特定性质和金属掺杂剂的组合允许高效有害的气体过滤，从而获得吸收和突破性结果，特别是与现有硅胶过滤产物相比。 使用方法和特定的过滤装置也包括在本发明中。
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公开(公告)号：US4762535A
公开(公告)日：1988-08-09
申请号：US57403
申请日：1987-06-02
申请人： Guido P. Pez , Daniel V. Laciak
发明人： Guido P. Pez , Daniel V. Laciak
IPC分类号： B01D53/22 , B01D19/00 , B01D53/58 , B01D61/38 , B01D69/00 , B01D69/14 , C01C1/04 , C01C1/10 , C01C1/12 , C01C3/02 , C02F1/20
CPC分类号： B01D61/38 , B01D69/141 , C01C1/0458 , C01C1/12 , C01C3/0212 , Y02P20/52
摘要： The present invention is a process for separating ammonia from mixtures of other gases or from aqueous streams. The ammonia-containing mixture is contacted with a membrane containing, as the active component, a salt having the structural formula: NR.sub.4.sup.+ X.sup.-, wherein each R is independently H or a straight chain or branched alkyl group and X.sup.- is an organic or inorganic anion. The membrane is useful for the selective permeation of ammonia from mixtures of gases containing ammonia, nitrogen and hydrogen.
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公开(公告)号：US4317808A
公开(公告)日：1982-03-02
申请号：US208026
申请日：1980-11-18
申请人： Carl Voigt , Hans Strack , Peter Kleinschmit
发明人： Carl Voigt , Hans Strack , Peter Kleinschmit
IPC分类号： C01C1/12 , B01D53/02 , B01D53/04 , C01B39/14 , C01B39/22 , C01B39/24 , C01B39/26 , C01B39/30 , C01C3/02
CPC分类号： B01D53/04 , C01C3/0233 , B01D2253/108 , B01D2257/406 , B01D2257/408 , B01D2257/7022 , B01D2259/40086 , B01D2259/402
摘要： For the reduction of the ammonia content in the product gas of the hydrocyanic acid-methane-ammonia (BMA) process and accordingly to increase the yield the reaction gas mixture of this process is brought into contact with zeolite and the ammonia thereafter desorbed from the zeolite preferably again employed in the reaction step. If the desorption is carried out with a flushing gas such as the hydrocarbon used in the reaction then this mixture can be directly supplied again to the BMA reactor. Through this procedure the amount of ammonia previously lost to the process can again be made useful in the process itself.
摘要翻译： 为了降低氢氰酸 - 甲烷 - 氨（BMA）工艺的产物气中的氨含量，并且为了提高产率，该方法的反应气体混合物与沸石接触，然后氨从沸石中脱附 优选在反应步骤中再次使用。 如果用反应中使用的烃类的冲洗气体进行解吸，则可以将该混合物再次直接供给到BMA反应器。 通过这个过程，过程中丢失的氨的量可以再次在该过程本身中有用。
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