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1. 发明授权

US09840667B2 Reverse osmosis for purifying mixtures of hydrofluoric acid and nitric acid 有权
公开(公告)号：US09840667B2
公开(公告)日：2017-12-12
申请号：US14786211
申请日：2014-04-16
申请人： SOLVAY SA
发明人： Jean-Marie Collard
IPC分类号： C09K13/08 , B01D61/02 , H01L31/18 , C01B21/46 , C01B7/19 , H01M4/1395 , H01L31/0236 , H01M4/38
CPC分类号： C09K13/08 , B01D61/025 , C01B7/195 , C01B21/46 , H01L31/02363 , H01L31/1804 , H01M4/1395 , H01M4/386 , Y02E10/50
摘要： Disclosed is a method of purifying a solution containing hydrofluoric acid, nitric acid and at least one silicon impurity by treating the solution with at least one reverse osmosis membrane. According to the method of the present invention, silicon impurities contained in the solution containing hydrofluoric acid and nitric acid can be selectively removed or reduced. This method can be advantageously used in the photovoltaic industry or in the battery component industry.

2. 发明申请

US20130259793A1 Method for Obtaining or Recovering Nitric Acid and Hydrofluoric Acid from Solutions of Stainless Steel Pickling Systems 审中-公开
标题翻译：从不锈钢酸洗系统溶液中获取或回收硝酸和氢氟酸的方法
公开(公告)号：US20130259793A1
公开(公告)日：2013-10-03
申请号：US13642720
申请日：2011-04-18
申请人： Gerhard Frithum , Herbert Klausner , Wilfried Szokol , Fabian Storek
发明人： Gerhard Frithum , Herbert Klausner , Wilfried Szokol , Fabian Storek
IPC分类号： C01B21/46 , C01B7/19
CPC分类号： C01B21/46 , C01B7/191 , C01B7/195 , C01B13/18 , C01B21/42 , C23G1/36 , Y02P20/129
摘要： A method for obtaining or recovering acids, in particular nitric acid and hydrofluoric acid, from solutions and/or metal salts of these acids containing solutions, comprising the steps of: a) spray-drying the solutions at temperatures below the decomposition temperature of the acids, the requisite energy for which is introduced via a gaseous heat-transfer medium, in order to obtain dry metal salts and gaseous acids; b) absorbing the gaseous acids formed in step a); c) separating out the dry metal salts formed in step a); optionally d) roasting the dry metal salts obtained in step a) at temperatures in the range from 400 to 900° C., in order to obtain metal oxides and gaseous acids; and e) absorbing the gaseous acids formed in step d).
摘要翻译：一种从这些含酸溶液的溶液和/或金属盐中获得或回收酸，特别是硝酸和氢氟酸的方法，包括以下步骤：a）在低于酸的分解温度的温度下将溶液喷雾干燥，通过气体传热介质引入其所需的能量，以获得干燥的金属盐和气态酸; b）吸收步骤a）中形成的气态酸; c）分离步骤a）中形成的干金属盐; 任选地d）在400-900℃的温度范围焙烧步骤a）中得到的干金属盐，以获得金属氧化物和气态酸; 和e）吸收步骤d）中形成的气态酸。

3. 发明申请

US20120301389A1 METHOD FOR THE SEPARATION OF A NON-VOLATILE STRONG ACID FROM A SALT THEREOF AND COMPOSITIONS PRODUCED THEREBY 审中-公开
标题翻译：从其盐分离非挥发性强酸的方法及其制备的组合物
公开(公告)号：US20120301389A1
公开(公告)日：2012-11-29
申请号：US13574641
申请日：2011-02-06
申请人： Aharon Eyal , Asher Vitner , Revital Mali , Carmi Raz
发明人： Aharon Eyal , Asher Vitner , Revital Mali , Carmi Raz
IPC分类号： C01B17/90 , C09K3/00
CPC分类号： C01B25/234 , C01B17/903 , C01B21/46
摘要： The present invention provides an organic phase composition comprising (a) a first solvent (S1) characterized by water solubility of less than 10% and by at least one of (a1) having a polarity related component of Hoy's cohesion parameter (delta-P) between 5 and 10 MPa1/2 and (b1) having a Hydrogen bonding related component of Hoy's cohesion parameter (delta-H) between 5 and 20 MPa1/2; (b) a second solvent (S2) characterized by a water solubility of at least 30% and by at least one of (a2) having delta-P greater than 8 MPa1/2 and (b2) having delta-H greater than 12 MPa1/2; (c) water; (d) a non-volatile strong acid; and (e) a salt thereof.
摘要翻译：本发明提供一种有机相组合物，其包含（a）第一溶剂（S1），其特征在于水溶性小于10％，和至少一种具有Hoy的内聚参数（Δ-P）的极性相关成分的（a1） 5〜10MPa1 / 2，（b1）具有5〜20MPa·1/2的Hoy粘结参数（δ-H）的氢键相关成分; （b）第二溶剂（S2），其特征在于水溶解度为至少30％，并且至少一种具有δ-P大于8MPa1 / 2的（a2）和（b2）具有大于12MPa1的Δ-H / 2; （c）水; （d）不挥发性强酸; 和（e）其盐。

4. 发明授权

US07851649B2 Process for the mononitration of alkanediols 失效
标题翻译：链烷二醇单硝化方法
公开(公告)号：US07851649B2
公开(公告)日：2010-12-14
申请号：US12036555
申请日：2008-02-25
申请人： Nevio Francescutti , Tiziano Scubla , Fausto Gorassini , Graziano Castaldi
发明人： Nevio Francescutti , Tiziano Scubla , Fausto Gorassini , Graziano Castaldi
IPC分类号： C07C63/00
CPC分类号： C01B21/46 , C07C201/02 , C07C203/04
摘要： A process for the preparation of compounds of formula HO-A-ONO2 (I) wherein A is a C2-C6 alkylene chain by nitration of the corresponding alkanediols with “stabilized” nitric acid is herein disclosed. The process is safer to operators and allows to obtain advantageous yields on an industrial scale.
摘要翻译：本文公开了通过用“稳定”的硝酸硝化相应的链烷二醇制备式HO-A-ONO 2（I）的化合物的方法，其中A是C2-C6亚烷基链。该过程对操作员更安全，并允许在工业规模上获得有利的产量。

5. 发明授权

US5266292A Method of extracting dinitrogen pentoxide from its mixture with nitric acid 失效
标题翻译：从硝酸与其混合物中提取五氧化二氮的方法
公开(公告)号：US5266292A
公开(公告)日：1993-11-30
申请号：US847989
申请日：1992-04-16
申请人： Greville E. G. Bagg , Anthony W. Arber
发明人： Greville E. G. Bagg , Anthony W. Arber
IPC分类号： C01B21/00 , C01B21/20 , C01B21/46 , C01B21/22 , C01B21/24 , C01B21/38
CPC分类号： C01B21/206 , C01B21/46
摘要： Method of extracting dinitrogen pentoxide (N.sub.2 O.sub.5) from its mixture in nitric acid, which consists of providing a solution of the mixture in an inert organic solvent, stripping out the N.sub.2 O.sub.5 from solution in a carrier gas stream containing ozone, and subsequently condensing the N.sub.2 O.sub.5 out of the gas stream by contact with further inert organic solvent. The presence of ozone suppresses the dissociation of the N.sub.2 O.sub.5 transferred to the gas stream into dinitrogen tetroxide (N.sub.2 O.sub.4). In a preferred embodiment the stripping and absorbing steps take place continuously in adjacent stripping and absorbing columns respectively having organic solvent recirculating through each.
摘要翻译： PCT No.PCT / GB91 / 01249 Sec。 371日期：1992年4月16日 102（e）日期1992年4月16日PCT 1991年7月15日PCT公布。出版物WO92 / 02451 日本1992年2月20日。从硝酸混合物中提取五氧化二氮（N2O5）的方法，其由在惰性有机溶剂中提供混合物的溶液组成，从含有臭氧的载气流中的溶液中除去N 2 O 5 然后通过与另外的惰性有机溶剂接触将N2O5从气流中冷凝出来。臭氧的存在抑制了转移到气流中的N2O5离解成四氧化二氮（N2O4）。在优选的实施方案中，汽提和吸收步骤在相邻的汽提塔和吸收塔中连续进行，分别具有通过各自循环的有机溶剂。

6. 发明授权

US5264123A Acid recycling system 失效
标题翻译：酸回收系统
公开(公告)号：US5264123A
公开(公告)日：1993-11-23
申请号：US931945
申请日：1992-08-18
申请人： Daniel E. Bailey
发明人： Daniel E. Bailey
IPC分类号： B01D61/24 , B01D63/08 , C01B7/07 , C01B21/46 , C23F1/46 , B01D61/28
CPC分类号： B01D61/243 , B01D63/084 , C01B21/46 , C01B7/0706 , C23F1/46
摘要： A system for removing acid from a metal-rich acid stream by diffusion dialysis. The acid stream is contacted with a water stream through an ion exchange membrane, in a series, counter-current flow contactor. The contactor is formed of a stack of layers of ion exchange membranes and impervious separators with flow-control apertures. The stack includes switch-back spacers which cause the flow to switch direction.
摘要翻译：通过扩散透析从富含金属的酸流中除去酸的体系。酸流与水流通过离子交换膜，一系列逆流流动接触器接触。接触器由离子交换膜的一叠层和具有流动控制孔的不透水分离器形成。堆叠包括使流动切换方向的开关间隔件。

7. 发明授权

US4344827A Process for working up nitric acid 失效
标题翻译：硝酸处理工艺
公开(公告)号：US4344827A
公开(公告)日：1982-08-17
申请号：US164445
申请日：1980-06-30
申请人： Wolfgang Auge , Bernd Thelen , Karl-Werner Thiem , Rutger Neeff
发明人： Wolfgang Auge , Bernd Thelen , Karl-Werner Thiem , Rutger Neeff
IPC分类号： C01B21/46 , B01D1/00 , B01D3/14
CPC分类号： C01B21/46 , Y10S159/19
摘要： Process for working up aqueous nitric acid which is of a concentration above the azeotropic concentration and contains organic compounds in solution for suspension wherein said nitric acid of a concentration about the azeotropic concentration is distilled off in one or more rectification steps until the azeotropic nitric acid is obtained. In the process, certain specified ratios of nitric acid and water to organic constituents must be maintained.
摘要翻译：用于处理浓度高于共沸浓度的硝酸水溶液并在悬浮溶液中含有有机化合物的方法，其中在一个或多个精馏步骤中蒸馏出浓度约为共沸浓度的硝酸，直到共沸硝酸为获得。在此过程中，必须保持某些特定比例的硝酸和水与有机成分。

8. 发明授权

US4110183A Process for denitration of exhaust gas 失效
标题翻译：排气处理方法
公开(公告)号：US4110183A
公开(公告)日：1978-08-29
申请号：US820316
申请日：1977-07-29
申请人： Isao Furuta , Yoshimi Takiguchi
发明人： Isao Furuta , Yoshimi Takiguchi
IPC分类号： B01D53/56 , B01D53/74 , B01J19/12 , C01B21/38 , C01B21/46 , B01J1/10
CPC分类号： C01B21/46 , B01D53/56
摘要： A process for removing nitrogen oxides from exhaust gases which comprises;Introducing an oxidizing gas into the exhaust gas to oxidize the nitrogen monoxide contained therein to nitrogen dioxide and thereby form a first oxidized exhaust gas;Irradiating said first oxidized gas with actinic light to oxidize said nitrogen dioxide to nitric acid and thereby form a second oxidized exhaust gas; andRemoving said nitric acid from said second oxidized exhaust gas.

9. 发明授权

US3803295A Method for removing iodine from nitric acid 失效
标题翻译：从硝酸中去除碘的方法
公开(公告)号：US3803295A
公开(公告)日：1974-04-09
申请号：US31745572
申请日：1972-12-21
申请人： ATOMIC ENERGY COMMISSION
发明人： CATHERS G , SHIPMAN C
IPC分类号： B01D59/04 , C01B21/46 , G21F9/08 , C01B7/14 , C01B21/44
CPC分类号： B01D59/04 , C01B21/46 , G21F9/08
摘要： A METHOD FOR REMOVING SMALL AMOUNTS OF RADIOACTIVE IODINE FROM NITRIC ACID SOLUTION BY ISOTOPICALLY DILUTING THE IODINE, SPARGING THE SOLUTION WITH OZONE, AND DISTILLING THE IODINE FROM SOLUTION.

10. 发明授权

US3758566A Removal of iron impurities 失效
标题翻译：去除铁损
公开(公告)号：US3758566A
公开(公告)日：1973-09-11
申请号：US3758566D
申请日：1971-04-21
申请人： CELANESE CORP
发明人： ORGAN G
IPC分类号： C01B21/46 , C07C51/48 , C07C55/14
CPC分类号： C07C51/48 , C01B21/46 , C07C55/10 , C07C55/14 , C07C55/12
摘要： Iron impurities are removed from an aqueous nitric acid solution containing copper and vanadium catalyst ions by solvent extraction with an organic solution of an organo-phosphate prior to passing the aqueous nitric acid solution through an ion exchange zone for recovery of the copper and vanadium.
摘要翻译：在通过硝酸水溶液通过用于回收铜和钒的离子交换区之前，用有机磷酸酯的有机溶液进行溶剂萃取，从含有铜和钒催化剂离子的硝酸水溶液中除去铁杂质。

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