专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

41. 发明申请

US20100266484A1 METHOD OF PROCESSING DIARSENIC TRIOXIDE 有权
标题翻译：加工二氧化硫的方法
公开(公告)号：US20100266484A1
公开(公告)日：2010-10-21
申请号：US12452593
申请日：2008-07-11
申请人： Mitsuo Abumiya , Yusuke Sato , Hironobu Mikami , Masami Oouchi , Tetsuo Fujita , Masayoshi Matsumoto
发明人： Mitsuo Abumiya , Yusuke Sato , Hironobu Mikami , Masami Oouchi , Tetsuo Fujita , Masayoshi Matsumoto
IPC分类号： C01G28/00
CPC分类号： C22B3/44 , C01G28/005 , C01P2002/72 , C01P2006/80 , C22B3/22 , C22B7/006 , C22B15/0026 , C22B30/04 , Y02P10/234
摘要： To provide a method of generating, with good reproducibility and ease and without complicated operations, scorodite which satisfies the elution standard (in accordance with Notification of No. 13 of Japanese Environment Agency) and which has good filterbility and stability for processing arsenic contained in a diarsenic trioxide form. A method of processing diarsenic trioxide, including: a leaching step of adding water to diarsenic trioxide to produce slurry, heating the slurry, and leaching arsenic while adding an oxidant to obtain leachate; a deoxidization step of removing the oxidant so as to obtain an adjusted solution; and a crystallizing step of converting arsenic in the adjusted solution to scorodite crystal.
摘要翻译：为了提供满足洗脱标准（根据日本环境局第13号的通知）的具有良好的再现性和容易性，无复杂操作的臭氧石，其具有良好的过滤性和稳定性，用于处理三氧化二砷形式。一种处理三氧化二砷的方法，包括：向三氧化二砷中加入水以产生浆料，加热浆料和浸出砷同时加入氧化剂以获得渗滤液的浸出步骤; 去除氧化剂以获得调节溶液的脱氧步骤; 以及将调整后的溶液中的砷转化为臭葱石晶体的结晶工序。

42. 发明授权

US5449503A Process for separating arsenic acid from an aqueous mixture comprising sulfuric and arsenic acids 失效
标题翻译：从含有硫酸和砷酸的含水混合物中分离砷酸的方法
公开(公告)号：US5449503A
公开(公告)日：1995-09-12
申请号：US296983
申请日：1994-08-26
申请人： Charles L. Redmon , Somanahalli N. Subbanna , Robert A. Smith
发明人： Charles L. Redmon , Somanahalli N. Subbanna , Robert A. Smith
IPC分类号： C01B17/90 , C01G28/00 , C01B9/08 , C22B30/00
CPC分类号： C01G28/005 , C01B17/907
摘要： The present invention provides a process for recovering arsenic acid from a starting mixture comprising sulfuric and arsenic acids and water. In step (a), the starting mixture is treated with a sulfur (IV) compound which will reduce the arsenic acid to arsenic (III) compound under conditions sufficient to substantially convert the arsenic acid to arsenic (III) wherein the resulting mixture comprises arsenic (III) compound, the sulfur (IV) compound, sulfuric acid, and water. In step (b), the resulting mixture is purged with gas to substantially remove the sulfur (IV) compound from the mixture wherein the purged mixture comprises the arsenic (III) compounds, sulfuric acid, and water. In step (c), the purged mixture is treated under conditions sufficient to substantially separate the arsenic (III) compounds from the purged mixture. In step (d), the separated arsenic (III) compound is reacted with an oxidizing agent to substantially convert arsenic (III) compound to arsenic acid wherein the final mixture comprises arsenic acid, unreacted oxidizing agent, and water. In step (e), impurities are removed from the final mixture to provide substantially pure aqueous arsenic acid.
摘要翻译：本发明提供从包含硫酸和砷酸和水的起始混合物中回收砷酸的方法。在步骤（a）中，起始混合物用硫（IV）化合物处理，该化合物在足以将砷酸基本转化成砷（III）的条件下将砷酸还原为砷（III）化合物，其中所得混合物包含砷（III）化合物，硫（IV）化合物，硫酸和水。在步骤（b）中，将所得混合物用气体吹扫以从混合物中基本上除去硫（IV）化合物，其中清除的混合物包含砷（III）化合物，硫酸和水。在步骤（c）中，将清洗的混合物在足以使砷（III）化合物与被清除的混合物基本分离的条件下进行处理。在步骤（d）中，分离的砷（III）化合物与氧化剂反应，以将砷（III）化合物基本上转化为砷酸，其中最终混合物包含砷酸，未反应的氧化剂和水。在步骤（e）中，从最终混合物中除去杂质以提供基本上纯的砷酸水溶液。

43. 发明授权

US5089241A Process for converting hexafluoroarsenic acid or any salt thereof to arsenic acid or salt thereof which can then be rendered nonhazardous 失效
标题翻译：将六氟砷酸或其盐转化成砷酸或其盐，然后可以使其成为非危险的方法
公开(公告)号：US5089241A
公开(公告)日：1992-02-18
申请号：US633652
申请日：1990-12-20
申请人： Robert A. Smith , Douglas G. Frick , Charles L. Redmon , Somanahalli N. Subbanna
发明人： Robert A. Smith , Douglas G. Frick , Charles L. Redmon , Somanahalli N. Subbanna
IPC分类号： A62D3/00 , A62D3/34 , A62D3/35 , A62D3/36 , A62D101/22 , A62D101/43 , A62D101/49
CPC分类号： A62D3/35 , C01B7/195 , C01G28/005 , A62D2101/43 , A62D2101/49
摘要： The present invention provides a process for the conversion of hazardous hexafluoroarsenic acid or any salt thereof to arsenic acid or salt thereof which can be rendered nonhazardous. In particular, the hexafluoroarsenic acid or salt is converted to arsenic acid or salt which can be converted to a water insoluble salt. Known insolubilization and stabilization technology then renders the material nonhazardous.The present process involves converting hexafluoroarsenic acid or salt thereof contained in an aqueous mixture to arsenic acid or salt thereof. The process comprises the steps of: (a) adding acid selected from the group consisting of sulfuric acid, arsenic acid, perchloric acid, and mixtures thereof to the aqueous mixture in an amount sufficient to catalyze the hydrolysis of the hexafluoroarsenic acid or salt thereof and raising the temperature of the aqueous mixture before, during, or after the acid addition sufficient to remove substantially all of the hydrogen fluoride in subsequent step (b); (b) passing an inert gas through the heated acid mixture steam in a quantity sufficient to remove substantially all of the hydrogen fluoride in the heated acid mixture from the heated acid mixture; and (c) separating substantially all of the hydrogen fluoride from the heated acid mixture whereupon the hexafluoroarsenic acid or salt thereof converts substantially to arsenic acid or salt thereof.
摘要翻译：本发明提供了将危险的六氟砷酸或其盐转化成可以变得不危险的砷酸或其盐的方法。特别地，将六氟砷酸或盐转化为可转化为水不溶性盐的砷酸或盐。已知的不溶化和稳定化技术使材料无害化。本方法涉及将含水混合物中所含的六氟砷酸或其盐转化为砷酸或其盐。该方法包括以下步骤：（a）以足以催化六氟砷酸或其盐的水解的量向该含水混合物中加入选自硫酸，砷酸，高氯酸及其混合物的酸，以及在酸加入之前，期间或之后提高含水混合物的温度，足以在随后的步骤（b）中除去基本上所有的氟化氢; （b）使惰性气体通过加热的酸性混合物蒸汽，其量足以从加热的酸混合物中除去加热的酸混合物中的基本上所有的氟化氢; 和（c）从加热的酸混合物中基本上分离所有氟化氢，因此六氟砷酸或其盐基本上转化为砷酸或其盐。

44. 发明授权

US4769230A Process for preparation of arsenic acid 失效
标题翻译：砷酸的制备方法
公开(公告)号：US4769230A
公开(公告)日：1988-09-06
申请号：US404614
申请日：1982-08-02
申请人： Nicholas P. Greco , Byung K. Ahn , John J. Kozak
发明人： Nicholas P. Greco , Byung K. Ahn , John J. Kozak
IPC分类号： C01G28/00
CPC分类号： C01G28/005
摘要： Arsenic acid is formed from arsenous acid and water under oxygen pressure with catalytic amounts of nitric acid and a halide whereby the nitric oxide by-product is regenerated to nitric acid for contact with fresh arsenous acid.
摘要翻译：在亚硝酸和氧气压力下用催化量的硝酸和卤化物形成砷酸，由此将一氧化氮副产物再生成硝酸以与新鲜的砷酸接触。

45. 发明授权

US4588564A Process for recovering arsenic trioxide from exhaust gas of smelting 失效
标题翻译：从冶炼废气中回收三氧化二砷的工艺
公开(公告)号：US4588564A
公开(公告)日：1986-05-13
申请号：US660110
申请日：1984-10-12
申请人： Hiroshi Kohno , Haruhiko Asao , Masao Kuwabara , Takashi Shimizu
发明人： Hiroshi Kohno , Haruhiko Asao , Masao Kuwabara , Takashi Shimizu
IPC分类号： B01D53/64 , C01G28/00 , C01G28/02
CPC分类号： C01G28/005 , C01P2006/80
摘要： In the process for recovering arsenic trioxide from scrubbing water used to scrub the flue gas of sulfide ore smelting, the crude arsenic trioxide crystals collected from the scrubbing solution which contains plaster as an impurity is purified by treating it with hydrochloric acid of a concentration of 50-150 g/l at a temperature not higher than 30.degree. C.
摘要翻译：在用于洗涤硫化矿冶炼的烟道气的洗涤水中回收三氧化二砷的过程中，将含有灰泥作为杂质的洗涤溶液收集的粗三氧化二砷晶体通过用浓度为50的盐酸处理而纯化 -150g / l，温度不高于30℃。

46. 发明授权

US4447405A Removal of bromides from arsenic acid solution 失效
标题翻译：从砷酸溶液中去除溴化物
公开(公告)号：US4447405A
公开(公告)日：1984-05-08
申请号：US411817
申请日：1982-08-26
申请人： Byung K. Ahn , Kenneth A. Morris
发明人： Byung K. Ahn , Kenneth A. Morris
IPC分类号： C01B7/09 , C01G28/00 , C01B29/00
CPC分类号： C01G28/005 , C01B7/096
摘要： Bromide ions when used as the redox intermediates in the oxidation of arsenic (III) oxide to arsenic (V) acid can be removed from a solution having a major proportion of arsenic acid by treatment with an oxidant selected from H.sub.2 O.sub.2, O.sub.3 or Cr(VI) to oxidize the bromide to bromine followed by purging with air, nitrogen or other inert gas to sweep out the resultant bromine. The bromine can be recovered and recycled to a fresh batch of arsenic (III) oxide.
摘要翻译：当氧化砷（III）氧化为砷（V）酸时，用作氧化还原中间体的溴离子可以通过用选自H 2 O 2，O 3或Cr（VI）的氧化剂处理从具有主要比例的砷的溶液中除去）将溴化物氧化成溴，然后用空气，氮气或其它惰性气体吹扫，以清除所得的溴。可以回收溴并再循环至新鲜的氧化砷（III）。

47. 发明授权

US4401632A Recovery of arsenic from flue dust 失效
标题翻译：从烟尘中回收砷
公开(公告)号：US4401632A
公开(公告)日：1983-08-30
申请号：US348118
申请日：1982-02-11
申请人： Brent W. Madsen , Henry Dolezal , Philip A. Bloom , Monte B. Shirts
发明人： Brent W. Madsen , Henry Dolezal , Philip A. Bloom , Monte B. Shirts
IPC分类号： C01G28/00
CPC分类号： C01G28/005 , C01P2006/80
摘要： Arsenic is recovered from flue dusts by forming an aqueous slurry of the dust, treating the slurry with SO.sub.2 gas to solubilize arsenic, and precipitating the arsenic as As.sub.2 O.sub.3 by means of sulfuric acid.
摘要翻译：通过形成粉尘的水性浆料从烟道灰中回收砷，用SO 2气体处理浆料以溶解砷，并通过硫酸使砷沉淀为As 2 O 3。

48. 发明授权

US4218425A Process for extracting arsenic from oxidic materials 失效
标题翻译：从氧化材料中提取砷的方法
公开(公告)号：US4218425A
公开(公告)日：1980-08-19
申请号：US920604
申请日：1978-06-29
申请人： Thomas L. Charlton , Robert F. Redden
发明人： Thomas L. Charlton , Robert F. Redden
IPC分类号： C01G28/00 , C22B30/04 , C01B27/02
CPC分类号： C22B30/04 , C01G28/005 , C01P2006/80 , Y02P10/234
摘要： A process is disclosed for the selective extraction of arsenic from oxidic materials containing compounds such as arsenic trioxide, arsenic pentoxide, antimony trioxide, antimony pentoxide, antimony tetroxide and mixtures thereof in which arsenic is effectively separated from antimony. Said oxidic materials are subjected to a leach with a lixiviant containing arsenic acid or hydrogen peroxide at a temperature in the range of 40.degree. C. to the boiling point of the reaction mixture, preferably in the range of 80.degree. to 100.degree. C., for 5 to 90 minutes. The leach solution containing arsenic oxides is separated from leach residue. The leach solution is either cooled to a temperature in the range of 5.degree. to 25.degree. C. to crystallize and subsequently recover arsenic trioxide or the solution is oxidized and evaporated and arsenic pentoxide is recovered. Arsenic acid lixiviant contains 5 to 500 g/l arsenic as arsenic pentoxide, preferably 25 to 200 g/l, and hydrogen peroxide lixiviant preferably contains a 10 to 60% hydrogen peroxide concentration.
摘要翻译：公开了从含有三氧化二砷，五氧化二锑，三氧化锑，五氧化二锑，四氧化锑及其混合物的化合物的氧化物质中选择性提取砷的方法，其中砷与锑有效分离。所述氧化物质在含有砷酸或过氧化氢的浸液中在40℃至反应混合物的沸点，优选在80℃至100℃的范围内进行浸提， 5至90分钟。含有氧化砷的浸出溶液与浸出残渣分离。将浸出溶液冷却至5〜25℃的温度，结晶并随后回收三氧化二砷或溶液氧化并蒸发，回收五氧化二砷。砷酸浸剂含有5〜500g / l的砷作为五氧化二砷，优选为25〜200g / l，过氧化氢浸泡剂优选含有10〜60％的过氧化氢浓度。

49. 发明授权

US3923478A Process and an apparatus for recovering arsenic trioxide from gases 失效
标题翻译：用于从气体中回收三氧化二砷的方法和装置
公开(公告)号：US3923478A
公开(公告)日：1975-12-02
申请号：US44138574
申请日：1974-02-11
申请人： BOLIDEN AB
发明人： FIEDLER UTZ GERHARD
IPC分类号： B01D53/14 , C01G28/00 , B01D47/00
CPC分类号： C01G28/005 , B01D53/14
摘要： The invention refers to a process and to an apparatus for recovering arsenic trioxide from a gas by washing out said oxide from the gas with a liquid having the ability of dissolving arsenic trioxide. The invention is characterized thereby that non-desired deposits in the apparatus formed in connection with saturated solution are removed by dissolution with an unsaturated solution of arsenic trioxide.
摘要翻译：本发明涉及通过用具有溶解三氧化二砷的能力的液体从气体中清除所述氧化物，从气体中回收三氧化二砷的方法和装置。本发明的特征在于，通过用三氧化二砷的不饱和溶液溶解来除去与饱和溶液结合形成的装置中的不需要的沉积物。

50. 发明授权

US3576601A Process for production of phosphoric acid by the use of an ion exchange resin 失效
标题翻译：使用离子交换树脂生产磷酸的方法
公开(公告)号：US3576601A
公开(公告)日：1971-04-27
申请号：US3576601D
申请日：1967-08-17
申请人： MULTI MINERALS LTD
发明人： COCHRAN LINDEN WAYNE
IPC分类号： B01J39/00 , C01B17/74 , C01B17/90 , C01B25/18 , C01G28/00 , G01S7/52
CPC分类号： C01G28/005 , B01J39/00 , C01B17/745 , C01B17/90 , C01B25/185 , C01P2006/80
摘要： THIS INVENTION RELATES TO A METHOD FOR THE PRODUCTION OF AN ACID, SUCH AS PHOSPHORIC, SULFURIC, ARSENIC, SULFUROUS, ETC., BY CONTACTING A MOTHER LIQUOR COMPRISING A SATURATED SOLUTION OF A SALT OF THE ACID WITH THE ACID AND A MATERIAL CONTAINING A SALT OF THE ACID AND THE SUBSEQUENT SEPARATION OF SUSPENDED CRYSTALS FROM SAID MOTHER LIQUOR FOR CONVERSION TO THE ACID BY CONTACT WITH AN ION EXCHANGE RESIN.

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式