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1.发明申请公开(公告)号：US20220219983A1
公开(公告)日：2022-07-14
申请号：US17613112
申请日：2020-07-10
申请人： HALDOR TOPSØE A/S
摘要： A sulfuric acid recirculation loop and a standalone sulfuric acid concentrator including: a concentrator column, an air lift pump having a liquid inlet fed with concentrated sulfuric acid from the outlet of a sulfuric acid reservoir downstream the concentrator column, a gas inlet fed with a carrier fluid having a lower density than the concentrated sulfuric acid, and an outlet, wherein the sulfuric acid reservoir is located below the concentrator column and above the carrier fluid inlet of the air lift pump, a downcomer pipe leading down from the sulfuric acid reservoir to the liquid inlet of the air lift pump, and a riser pipe leading up from the carrier fluid inlet on the air lift pump to an inlet pipe for the concentrator column, the inlet pipe being configured for allowing a liquid flow from the inlet to the outlet.
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公开(公告)号：US10351427B2
公开(公告)日：2019-07-16
申请号：US15894863
申请日：2018-02-12
摘要： A method for manufacturing high purity sulfuric acid is provided. A mixed solution subsequently undergoes a first preheating step, a second preheating step, a distilling step and an evaporating step to remove peroxide, water, oxygen and insoluble impurities, so as to obtain the first gas containing sulfur trioxide, sulfuric acid and hydrogen oxide. And then, the sulfur trioxide is absorbed by a sulfuric acid solution, thereby forming the high purity sulfuric acid.
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公开(公告)号：US20180162731A1
公开(公告)日：2018-06-14
申请号：US15894863
申请日：2018-02-12
摘要： A method for manufacturing high purity sulfuric acid is provided. A mixed solution subsequently undergoes a first preheating step, a second preheating step, a distilling step and an evaporating step to remove peroxide, water, oxygen and insoluble impurities, so as to obtain the first gas containing sulfur trioxide, sulfuric acid and hydrogen oxide. And then, the sulfur trioxide is absorbed by a sulfuric acid solution, thereby forming the high purity sulfuric acid.
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公开(公告)号：US09849419B2
公开(公告)日：2017-12-26
申请号：US15308720
申请日：2014-05-09
申请人： OUTOTEC (FINLAND) OY
发明人： Karl-Heinz Daum , Hannes Storch , Wolfram Schalk
CPC分类号： B01D53/507 , B01D53/1481 , B01D53/18 , B01D2251/506 , C01B17/806 , C01B17/88
摘要： A process for the production of liquid acid, comprising the steps of: feeding liquid acid with a first concentration into a gas purification; passing a gas through the gas purification such that a second concentration of the liquid acid is reached; withdrawing the liquid acid from the sump of the gas purification, where in the gas purification sump is divided by a partition wall into a first and a second section. The concentration of the liquid acid collected in the first section is adjusted to the first concentration. The liquid acid with the first concentration from the first section is at least partially fed back into step and the liquid acid with the second concentration collected in the second section is at least partially withdrawn as product.
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公开(公告)号：US5075097A
公开(公告)日：1991-12-24
申请号：US595516
申请日：1990-10-11
申请人： Gordon M. Cameron
发明人： Gordon M. Cameron
IPC分类号： C01B17/88
CPC分类号： C01B17/88 , Y10S423/02
摘要： Dilute waste sulfuric acid is concentrated by heating it against product acid and then passing it through two contact zones separated by a collection zone. The dilute acid scrubs vapour produced in the collection zone and from a high temperature acid reboiler. In the collection zone acid is drawn off, heated, and recirculated to the collection zone where part of the liquid flashes to vapour. The main heat input is to the more dilute low temperature recirculating acid from the first contact zone rather than to the more concentrated high temperature acid in the reboiler. As a result, less sulfuric acid vapour is generated; the major portion of the heat can be fed to the process at low temperature; and only a single column is required, having a single cool clear water vapour exit stream to dispose of.
摘要翻译： 稀释废硫酸通过加热产品酸浓缩，然后将其通过由收集区分离的两个接触区域。 稀酸洗涤收集区产生的蒸气和高温酸再沸器。 在收集区中，酸被抽出，加热并再循环到收集区，其中部分液体闪蒸至蒸气。 主要的热量输入是来自第一接触区域的更稀释的低温再循环酸，而不是再沸器中更浓缩的高温酸。 结果，产生较少的硫酸蒸气; 热的主要部分可以在低温下进料到工艺中; 并且仅需要单个柱，具有单个清澈的透明水蒸气出口流以处置。
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公开(公告)号：US4857281A
公开(公告)日：1989-08-15
申请号：US144292
申请日：1988-01-15
申请人： Heiko Beckhaus , Harro Witt , Peter Klein
发明人： Heiko Beckhaus , Harro Witt , Peter Klein
摘要： A Pauling boiler for the concentration of sulphuric acid, wherein the external surface of the Pauling boiler is coated with aluminum.A process for the concentration of sulphuric acid in Pauling boilers by underfiring with gas or liquid fuels, wherein the concentration is carried out in a Pauling boiler coated with aluminum.
摘要翻译： 用于浓缩硫酸的鲍林锅炉，其中鲍林锅炉的外表面涂有铝。 通过用气体或液体燃料进行燃烧，在宝宁锅炉中浓缩硫酸的方法，其中浓度在涂有铝的鲍林锅炉中进行。
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公开(公告)号：US4673560A
公开(公告)日：1987-06-16
申请号：US771054
申请日：1985-08-30
CPC分类号： H05B6/802 , B01D1/0017 , C01B17/88 , C01B17/90 , H05B6/782
摘要： Process and apparatus for the generation of sulphur trioxide from oleum using microwave energy for use in the sulphonation and nitration of organic compounds and the fortification of oleum. The process provides improved control of production and concentration of the sulphur trioxide produced and comprises subjecting sulphur trioxide-rich oleum feed to microwave energy for a sufficient period of time to produce sulphur trioxide vapour and spent oleum; isolating said sulphur trioxide vapour and collecting said spent oleum.
摘要翻译： 使用微波能量从发烟硫酸生成三氧化硫的方法和设备用于有机化合物的磺化和硝化以及发烟硫磺的强化。 该方法提高了对生成的三氧化硫的生产和浓度的控制，并且包括使三氧化硫富集的发烟硫酸进料在微波能量下足够长的时间以产生三氧化硫蒸汽和废发烟硫酸; 分离所述三氧化硫蒸气并收集所述废发烟硫酸。
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公开(公告)号：US4329155A
公开(公告)日：1982-05-11
申请号：US167402
申请日：1980-07-11
申请人： Rainer Schlegel
发明人： Rainer Schlegel
CPC分类号： C01B17/905 , C01B17/88 , C01B17/90
摘要： The invention relates to a process for the purification of fluoride-containing 65 to 95% strength waste sulfuric acid which contains water, organic impurities and fluoride. The impure sulfuric acid is introduced onto the top tray of a stripping column, in which this waste acid is heated and pre-concentrated. The heated acid then flows into a heating tank filled with boiling concentrated sulfuric acid. The sulfuric acid vapors escaping from this heating tank are condensed in the stripping column by the waste sulfuric acid flowing in counter-current. According to the invention, at least in the region of one tray of the stripping column, construction components which come into contact with acid vapors or liquid acid consist of acid-resistant plastic, at least on the surface.
摘要翻译： 本发明涉及一种净化含有65至95％的含有水，有机杂质和氟化物的废硫酸的含氟化物的方法。 将不纯的硫酸引入汽提塔的顶部塔板中，在其中将该废酸加热并预浓缩。 然后加热的酸流入装有沸腾浓硫酸的加热槽中。 从该加热罐逸出的硫酸蒸汽在逆流中通过废硫酸在汽提塔中冷凝。 根据本发明，至少在汽提塔的一个塔板的区域中，至少在表面上与酸性蒸气或液体酸接触的结构部件由耐酸塑料组成。
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9.发明授权
公开(公告)号：US4251715A
公开(公告)日：1981-02-17
申请号：US858078
申请日：1977-12-06
申请人： Stig A. Petersson , Allan F. Norro
发明人： Stig A. Petersson , Allan F. Norro
CPC分类号： C01B17/88 , F22B1/30 , H05B3/03 , Y10S159/01 , Y10S159/19
摘要： A method is provided for directly heating a concentrated sulphuric-acid solution by passing alternating electric current between surface-passivated electrodes immersed in the solution and by using electrodes of iron or an iron alloy having a low resistance iron or iron alloy inner core covered by an outer high resistance passivating surface layer which are so surface-passivated that the transition resistance between the electrodes and the concentrated sulphuric-acid solution is at least as great as the resistance exerted by the concentrated sulphuric-acid solution.
摘要翻译： 提供了一种通过在浸入溶液中的表面钝化电极之间通过交流电流并且通过使用具有低电阻铁或铁合金内核的铁或铁合金的电极来直接加热浓硫酸溶液的方法， 表面钝化的外部高电阻钝化表面层，电极和浓硫酸溶液之间的过渡电阻至少与由浓硫酸溶液施加的电阻一样大。
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公开(公告)号：US4169054A
公开(公告)日：1979-09-25
申请号：US943995
申请日：1978-09-20
CPC分类号： C01B17/90 , C01B17/88 , Y10S159/19
摘要： Concentrated sulphuric acid aqueous solutions, stably clear through the time, are obtained starting from diluted sulphuric acid aqueous solutions containing Mg and possibly other impurities such as Fe, Al, Cr, V and Mn, by evaporation concentration. The process is characterized in that, before filtering, the slurry obtained by evaporation concentration, is cooled down to 10.degree.-25.degree. C. and maintained at this temperature for not less than 12 hours.
摘要翻译： 通过蒸发浓缩从含有Mg和可能的其他杂质如Fe，Al，Cr，V和Mn的稀硫酸水溶液开始获得浓缩的硫酸水溶液，从而稳定地清除。 该方法的特征在于，在过滤之前，将通过蒸发浓缩获得的浆液冷却至10 -25℃，并在该温度下保持不少于12小时。
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