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公开(公告)号：US20070265466A1
公开(公告)日：2007-11-15
申请号：US11801719
申请日：2007-05-10
申请人： Markus Dugal , Bernd Pennemann , Friedhelm Kamper
发明人： Markus Dugal , Bernd Pennemann , Friedhelm Kamper
IPC分类号： C07C263/10
CPC分类号： C01B7/04 , C01B7/0743 , C01B17/88 , C01B17/94 , C01B32/80 , C07C265/14
摘要： A process for the coupled production of chlorine and isocyanates in which the sulfuric acid used for both processes is combined after use, concentrated together and returned to one or both processes.
摘要翻译： 用于偶联生产氯和异氰酸酯的方法，其中用于两种方法的硫酸在使用后组合，浓缩在一起并返回到一种或两种方法。
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公开(公告)号：US06926757B2
公开(公告)日：2005-08-09
申请号：US10451358
申请日：2001-12-11
申请人： Aarno Kalliokoski , Pauli Kuisma
发明人： Aarno Kalliokoski , Pauli Kuisma
CPC分类号： B01D53/75 , B01D1/14 , C01B17/88 , Y02P20/129
摘要： The invention relates to a method for the concentration of the spent acid produced in connection with the scrubbing smelter or roaster gas. The hot gas produced is scrubbed first by dry and then by wet separation, and the scrubbed gas is conducted to the manufacture of a sulfurous end product. The spent acid formed is dilute, and its sulfuric acid content is increased by making use of the thermal capacity of the actual hot gas, which comes from dry separation. Thus, by making use of the thermal capacity of the gas created in the process, it is possible to replace, at least partly, the use of evaporators.
摘要翻译： 本发明涉及一种浓缩与洗涤冶炼炉或焙烧炉气体相关产生的废酸的方法。 首先通过干燥然后通过湿分离来洗涤所产生的热气体，并且将洗涤的气体进行至亚硫酸终产物的制造。 所形成的废酸是稀释的，其硫酸含量通过利用来自干分离的实际热气的热容量而增加。 因此，通过利用在该过程中产生的气体的热容量，可以至少部分地替代蒸发器的使用。
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公开(公告)号：US06858198B2
公开(公告)日：2005-02-22
申请号：US10051512
申请日：2002-01-18
摘要： Provided is a method for regulating the concentration of water in the acid feed stream in a process for the production of HF by the reaction with a fluorine containing material, the method comprising: (a) providing an acid feed stream comprising bound water and free water; (b) estimating the concentration of bound water and free water in the acid feed stream by providing a probe in said feed stream; and (c) adjusting the concentration of free water in said process stream based on said estimating step.
摘要翻译： 本发明提供一种通过与含氟材料反应生产HF的方法来调节酸进料流中的水浓度的方法，该方法包括：（a）提供含有结合水和游离水的酸进料流 ;（b）通过在所述进料流中提供探针来估计酸进料流中结合水和游离水的浓度; 和（c）基于所述估计步骤调节所述工艺流中的游离水的浓度。
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4.发明申请公开(公告)号：US20040211464A1
公开(公告)日：2004-10-28
申请号：US10478311
申请日：2004-05-17
发明人： Yasuhito Inagaki
IPC分类号： G05D011/00
CPC分类号： G06Q10/06 , C01B17/69 , C01B17/88 , C01B17/901 , Y10S423/02 , Y10T137/0329 , Y10T137/2509
摘要： The present invention provides a system for recycling spent sulfuric acid, which aims at providing an industrially advantageous system featuring that spent sulfuric acid is effectively utilized at a place other than a discharge source regardless of geographical conditions, and also provides a method for recycling waste sulfuric acid, and recycled sulfuric acid. In the system, when spent sulfuric acid discharged or collected at a discharge source A is transported by a carrier unit B, and used at a user office C, a concentration of the spent sulfuric acid is measured and/or adjusted at least at one of the discharge source A, the carrier unit B, and the user office C. The spent sulfuric acid waste liquid discharged or collected at the discharge source A is reutilized by being mixed with at least one of a hydrogen peroxide solution and water.
摘要翻译： 本发明提供了一种回收废硫酸的系统，其目的在于提供一种工业上有利的系统，其特征在于废硫酸在排放源以外的地方有效地被利用，而不管地理条件如何，并且还提供了一种回收废硫酸 酸和再循环的硫酸。 在该系统中，当在排出源A排出或收集的废硫酸由载体单元B输送并在用户办公室C使用时，测量废弃硫酸的浓度和/或至少在 排出源A，运送单元B和用户办公室C.排出源A排出或收集的废硫酸废液通过与过氧化氢溶液和水中的至少一种混合而再利用。
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公开(公告)号：US20040062707A1
公开(公告)日：2004-04-01
申请号：US10451358
申请日：2003-06-19
发明人： Aarno Kalliokoski , Pauli Kuisma
IPC分类号： C01B017/69
CPC分类号： B01D53/75 , B01D1/14 , C01B17/88 , Y02P20/129
摘要： The invention relates to a method for the concentration of the spent acid produced in connection with the scrubbing smelter or roaster gas. The hot gas produced is scrubbed first by dry and then by wet separation, and the scrubbed gas is conducted to the manufacture of a sulfurous end product. The spent acid formed is dilute, and its sulfuric acid content is increased by making use of the thermal capacity of the actual hot gas, which comes from dry separation. Thus, by making use of the thermal capacity of the gas created in the process, it is possible to replace, at least partly, the use of evaporators.
摘要翻译： 本发明涉及一种浓缩与洗涤冶炼炉或焙烧炉气体相关产生的废酸的方法。 首先通过干燥然后通过湿分离来洗涤所产生的热气体，并且将洗涤的气体进行至亚硫酸终产物的制造。 所形成的废酸是稀释的，其硫酸含量通过利用来自干分离的实际热气的热容量而增加。 因此，通过利用在该过程中产生的气体的热容量，可以至少部分地替代蒸发器的使用。
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公开(公告)号：US6156288A
公开(公告)日：2000-12-05
申请号：US205672
申请日：1998-12-04
申请人： Heiko Beckhaus , Jurgen Munnig , Dieter Grenner
发明人： Heiko Beckhaus , Jurgen Munnig , Dieter Grenner
摘要： A process is provided for the purification of sulfuric acid contaminated with impurities, such as nitric acid, nitrosylsulfuric acid, dinitrotoluenes and mononitrotoluenes, wherein this contaminated sulfuric acid was obtained from the production of nitrated toluene using toluene and nitric acid. The contaminated sulfuric acid is preheated to a temperature in the range of 50 to 180.degree. C. in a heat exchanger. The heated, contaminated sulfuric acid is freed from steam-volatile impurities, such as dinitrotoluenes and mononitrotoluenes, and the nitrogen-containing compounds within the sulfuric acid are decomposed by counter currently contacting the contaminated sulfuric acid with steam and vapors from a downstream concentration step in a steam stripper, which is operated at a pressure ranging from 300 to 1,000 mbars. The steam-stripped sulfuric acid is fed into a first concentration stage, which is operated at the same pressure used in the steam stripper. The concentrated sulfur acid is then fed into a vacuum concentration process which produces a sulfuric acid having a concentration of 88 to 97 percent by weight. By using the same pressure that the steam stripper operates at in the first concentration stage, the crystallization of nitroaromatic compounds can be avoided in the condensation system of the concentration stages, along with the concomitant blockage of the condensation system that would have been caused by the crystals.
摘要翻译： 提供了用于净化被杂质污染的硫酸的方法，例如硝酸，亚硝酰基硫酸，二硝基甲苯和一硝基甲苯，其中该受污染的硫酸是使用甲苯和硝酸从硝化甲苯生产得到的。 将污染的硫酸在热交换器中预热至50〜180℃的温度。 受热污染的硫酸不含蒸汽挥发性杂质，例如二硝基甲苯和单硝基甲苯，硫酸中的含氮化合物由目前与污染的硫酸接触的蒸汽和蒸汽从下游浓缩步骤中分解 蒸汽汽提器，其工作压力范围为300至1,000千巴。 将蒸汽汽提的硫酸进料到第一浓缩阶段，其在与汽提塔中相同的压力下运行。 然后将浓硫酸加入到产生浓度为88-97重量％的硫酸的真空浓缩过程中。 通过使用蒸汽汽提器在第一浓缩阶段中操作的相同压力，在浓缩阶段的冷凝系统中可以避免硝基芳族化合物的结晶，同时伴随着会引起凝结系统的堵塞 晶体。
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公开(公告)号：US5275701A
公开(公告)日：1994-01-04
申请号：US033653
申请日：1993-03-15
CPC分类号： B01D1/26 , C01B17/88 , C01B17/905 , C01B17/94 , Y10S159/08 , Y10S159/42 , Y10S203/08
摘要： A process for the purification and concentration of sulfuric acid contained with nitric acid by-products and organic components pursuant to the mixed acid nitration of aromatics. The process resides in the integration of a purification system with a concentration system which includes:heat exchanging spent sulfuric acid feedstock in indirect heat exchange with hot, concentrated sulfuric acid obtained from the sulfuric acid concentration system prior to introduction to said purification system;introducing the hot sulfuric acid into an upper portion of a purification system including a stripping column wherein organic contaminants and nitrogen-containing by-products are removed by countercurrent contact with superheated steam or hot gases;removing a contaminant-free sulfuric acid stream from a lower portion of said stripping column and introducing said contaminant-free sulfuric acid to the first stage of a sulfuric acid concentration system including a multiple effect vacuum concentration system;establishing a pressure differential between the removal point for the contaminant-free sulfuric acid from the stripping column and the entry point for the sulfuric acid concentration system including a multiple effect evaporator system such that the pressure differential is sufficient to provide flow from said stripping column to the multiple effect evaporator system without external pumps.
摘要翻译： 根据芳族化合物的混合酸硝化，纯化和浓缩含有硝酸副产物和有机组分的硫酸的方法。 该方法在于净化系统与浓缩系统的整合，其包括：在引入所述净化系统之前，将从硫酸浓缩系统获得的热的浓硫酸进行间接热交换热交换废硫酸原料; 将热硫酸引入包括汽提塔的净化系统的上部，其中通过与过热蒸汽或热气体逆流接触除去有机污染物和含氮副产物; 从所述汽提塔的下部除去不含污染物的硫酸料流，并将所述无污染物的硫酸引入包括多重真空浓缩系统的硫酸浓缩系统的第一阶段; 建立来自汽提塔的无污染硫酸的去除点与硫酸浓缩系统的入口点之间的压力差，其包括多重效应蒸发器系统，使得压力差足以提供从所述汽提塔到 多效蒸发器系统无外部泵。
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公开(公告)号：US4671951A
公开(公告)日：1987-06-09
申请号：US918608
申请日：1986-10-10
申请人： Gary M. J. Masse
发明人： Gary M. J. Masse
CPC分类号： C01B17/88
摘要： This invention relates to a process for the production of concentrated sulphuric acid from waste sulphuric acid which comprises subjecting said waste acid to microwave energy for a sufficient period of time to effect production of water vapor, whereby said waste acid is concentrated to a desired degree; removing said water vapor; and collecting said concentrated acid.
摘要翻译： 本发明涉及从废硫酸生产浓硫酸的方法，该方法包括使所述废酸经受足够的时间的微波能量以产生水蒸气，由此将所述废酸浓缩至期望的程度; 去除所述水蒸气; 并收集所述浓缩酸。
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9.发明授权Device for an installation of a quartz tube in a device for concentration of mineral acids 失效用于在无机酸浓缩装置中安装石英管的装置
公开(公告)号：US4243477A
公开(公告)日：1981-01-06
申请号：US041140
申请日：1979-05-21
申请人： Hans Broberg , Lars Douren
发明人： Hans Broberg , Lars Douren
CPC分类号： C01B17/88 , B01D1/065 , Y10S159/15
摘要： The evaporating tubes of an acid concentrating system are positioned within a double-walled tube unit which directs heating gases over the tube and are supported at their lower ends on a spherical bearing surface which permits relative movement of the components without inducing unacceptable stress levels.
摘要翻译： 酸浓缩系统的蒸发管定位在双壁管单元内，该双层管单元将加热气体引导到管上并且在其下端处支撑在球面轴承表面上，允许部件的相对运动而不引起不可接受的应力水平。
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10.发明授权Foam prevention during the regeneration of waste sulfuric acid with aromatic nitro compounds 失效在废硫酸与芳香硝基化合物再生期间防止泡沫
公开(公告)号：US4150103A
公开(公告)日：1979-04-17
申请号：US853312
申请日：1977-11-21
CPC分类号： C01B17/88
摘要： The foam formation arising when aqueous waste sulfuric acid is concentrated can be suppressed by adding aromatic nitro compounds such as nitrobenzene to the acid.
摘要翻译： 通过向硝酸中加入硝基苯等芳香族硝基化合物，可以抑制废弃硫酸浓缩时产生的泡沫形成。
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