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公开(公告)号：US1340290A
公开(公告)日：1920-05-18
申请号：US26887218
申请日：1918-12-30
申请人： SAMUEL M SHOEMAKER
发明人： JOHN PATTEN
IPC分类号： C01B17/88
CPC分类号： C01B17/88 , Y10S159/19
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公开(公告)号：US20220371890A1
公开(公告)日：2022-11-24
申请号：US17736785
申请日：2022-05-04
发明人： Ching-Jung KAN
IPC分类号： C01B17/765 , C01B17/88 , C01B17/79 , C01B17/775 , C01B17/58
摘要： A method for preparing an electronic grade sulfuric acid from a waste sulfuric acid solution includes the steps of: performing, in sequence, a concentration treatment, a cracking treatment, and a purification treatment; performing a first oxidation treatment on sulfur dioxide; performing a first absorption treatment and a second oxidization treatment; performing an evaporation treatment; performing a first removal treatment on an acid mist containing metal ions and anion impurities; performing a second absorption treatment; and performing a second removal treatment on residual sulfur dioxide.
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公开(公告)号：US20220002155A1
公开(公告)日：2022-01-06
申请号：US17286450
申请日：2019-10-17
申请人： PLINKE GMBH
摘要： In a process for workup of mixed acid and wastewater from the nitration of aromatics in which the nitric acid present is converted by reaction with an aromatic under adiabatic conditions, a. at least one waste stream component selected from waste acid (mixed acid) generated in the nitration, acidic washing water from the workup of crude nitroaromatics and dilute nitric acid generated in an off-gas treatment in the course of the nitration is provided, b. the at least one waste stream component is mixed with re-concentrated sulfuric acid, c. an aromatic is added to the mixture in stoichiometric excess based on the nitric acid, d. the obtained reaction mixture is reacted in an adiabatically operated reactor, e. the obtained organic phase is separated from the sulfuric-acid-containing phase in a separator, f. the sulfuric-acid-containing phase is concentrated under vacuum and g. at least one substream of the re-concentrated sulfuric acid from step g) is employed in step b).
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公开(公告)号：US09926198B2
公开(公告)日：2018-03-27
申请号：US14266819
申请日：2014-04-30
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：US20170182457A1
公开(公告)日：2017-06-29
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：US09139508B2
公开(公告)日：2015-09-22
申请号：US14374665
申请日：2013-01-28
IPC分类号： C07C201/08 , C07C205/06 , C01B17/94 , C01B17/88
CPC分类号： C07C201/08 , C01B17/88 , C01B17/94 , C07C205/06
摘要： The present invention relates to a process and a plant for the production, in particular the continuous production, of nitrobenzene by means of adiabatic nitration of benzene with nitric acid in the presence of sulfuric acid, in which, following the nitration, a multi-stage concentration of the sulfuric acid is carried out by means of heating at a pressure that is reduced as compared with ambient pressure, and wherein the heating takes place using the heat generated in the adiabatic nitration of benzene.
摘要翻译： 本发明涉及在硫酸存在下通过苯与硝酸的绝热硝化来生产，特别是连续生产硝基苯的方法和设备，其中在硝化之后，进行多阶段 通过在与环境压力相比降低的压力下加热进行硫酸的浓度，并且其中使用在苯的绝热硝化中产生的热量进行加热。
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公开(公告)号：US20120308473A1
公开(公告)日：2012-12-06
申请号：US13577013
申请日：2011-01-11
申请人： Karl-Heinz Daum , Henry Eisermann , Wolfram Schalk
发明人： Karl-Heinz Daum , Henry Eisermann , Wolfram Schalk
CPC分类号： C01B17/80 , B01F3/0865 , B01F5/0451 , B01F5/0453 , B01F5/0456 , B01F5/0463 , B01F5/0646 , B01F5/0648 , C01B17/69 , C01B17/74
摘要： A method for adjusting a concentration of an acid or lye includes charging a medium for adjusting the concentration of the acid or lye into a supply conduit of the acid or lye so as to provide a combined stream. The combined stream is supplied through an inlet to a mixing chamber such that the combined stream is deflected upon entering the mixing chamber. The combined stream is mixed in the mixing chamber. The combined stream is discharged through an outlet of the mixing chamber such that the combined stream is again deflected upon being discharged from the mixing chamber.
摘要翻译： 用于调节酸或碱液浓度的方法包括将用于调节酸或碱液浓度的介质装入酸或碱液的供应导管中以提供组合的流。 组合的流通过入口供应到混合室，使得组合的流在进入混合室时被偏转。 合并的流在混合室中混合。 组合的流通过混合室的出口排出，使得当混合流从混合室排出时再次被偏转。
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公开(公告)号：US20050269266A1
公开(公告)日：2005-12-08
申请号：US11141490
申请日：2005-06-01
CPC分类号： B01D61/364 , C01B17/88 , C25B15/08
摘要： A method of enhancing the concentration of a first inorganic compound in a first aqueous solution of a first process of a heavy chemical plant, the method comprising (a) feeding the first solution having the first compound at a first concentration and a first water vapor pressure to an osmotic membrane distillation means comprising a hydrophobic, gas and water vapor permeable membrane separating (i) a first chamber for receiving the first solution, from (ii) a second chamber for receiving a receiver feed aqueous solution having a second water vapor pressure lower than the first water vapor pressure; (b) feeding the receiver aqueous feed solution to the second chamber as to effect transfer of water vapor through the membrane from the first chamber to the second chamber, and to produce (i) a resultant first solution having a second concentration of the first compound greater than the first concentration and (ii) a diluted receiver feed aqueous solution; and (c) collecting the resultant first solution. The apparatus and method are of particular value in electrolytic haloalkali production plants in offering reduced capital and operating re-concentration and dilution costs.
摘要翻译： 一种提高重化工厂第一工序的第一水溶液中第一无机化合物浓度的方法，该方法包括（a）将第一化合物的第一溶液以第一浓度和第一水蒸气压 涉及一种包含疏水性，气体和水蒸气可渗透膜的渗透膜蒸馏装置，其分离（i）用于接收第一溶液的第一室，（ii）用于接收第二水蒸气压较低的接收器进料水溶液的第二室 比第一次水蒸气压力高; （b）将所述接收器水性进料溶液供给到所述第二室，以使水蒸汽通过所述膜从所述第一室转移到所述第二室，并且产生（i）所得第一溶液具有所述第一化合物的第二浓度 大于第一浓度和（ii）稀释的受体进料水溶液; 和（c）收集所得的第一溶液。 该设备和方法在电解卤代碱生产工厂中具有特殊价值，从而降低资本和运营重新浓缩和稀释成本。
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公开(公告)号：US6090364A
公开(公告)日：2000-07-18
申请号：US976312
申请日：1997-11-21
申请人： Peter Schoubye
发明人： Peter Schoubye
CPC分类号： C01B17/88
摘要： The present invention provides a process for concentrating sulphuric acids with concentrations of 90% to 98% H.sub.2 SO.sub.4 and temperatures of 160.degree. C. to 270.degree. C. into sulphuric acid with concentrations of 96% to 98.8% H.sub.2 SO.sub.4 by contacting the acid countercurrently in a packed tower with hot air or with hot process gas containing up to 6% SO.sub.3 and up to 30% H.sub.2 O and with inlet temperatures to the tower of 350.degree. C to 600.degree. C. The H.sub.2 O and H.sub.2 SO.sub.4 evaporated in the tower is contained in a stream of offgas from which the H.sub.2 SO.sub.4 thereafter is removed by controlled condensation The invention relates, in particular, to concentrating the product acid from wet gas sulphuric acid plants in which condensation of H.sub.2 SO.sub.4 takes place in the presence of excess H.sub.2 O in the process gas in air cooled, vertical glass tubes.
摘要翻译： 本发明提供了一种将浓度为90％至98％的H 2 SO 4和160至270℃的硫酸浓缩成浓度为96％至98.8％的H 2 SO 4的硫酸的方法，其通过将酸逆向接触 填充塔用热空气或含有高达6％SO 3和高达30％H 2 O的热处理气体，并且塔的入口温度为350℃至600℃。在塔中蒸发的H 2 O和H 2 SO 4含有 通过控制的冷凝从其中除去H 2 SO 4的废气流本发明特别涉及浓缩来自湿气硫酸设备的产物酸，其中在空气中的过程气体中存在过量H 2 O时发生H 2 SO 4的冷凝 冷却，垂直玻璃管。
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公开(公告)号：US5648565A
公开(公告)日：1997-07-15
申请号：US679323
申请日：1996-07-12
IPC分类号： C01B17/88 , C07C201/08 , C07C201/16 , C07C205/06 , C07C205/00
CPC分类号： C07C201/08
摘要： Mononitrotoluenes can be prepared by intensively mixing together toluene, nitric acid, sulphuric acid and water, simultaneously or successively in their total amount, and, in the case of continuous preparation, redispersing the mixture at least twice, for which purpose a mixing energy of 1 to 40 watts per liter of the total reaction mixture, preferably 3 to 30 W/l, is employed per volume of the reactor, and, for the continuous procedure, the back mixing is substantially repressed. Adiabatic reaction conditions are maintained.
摘要翻译： 单硝基甲苯可以通过将甲苯，硝酸，硫酸和水同时或相继浓缩在一起而制备，并且在连续制备的情况下，将混合物再分散至少两次，为此目的的混合能量为1 至40瓦/升的总反应混合物，优选3至30W / l，并且对于连续方法，背混合基本上被压制。 保持绝热反应条件。
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