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公开(公告)号：US5415849A
公开(公告)日：1995-05-16
申请号：US202225
申请日：1994-02-25
申请人： Keiji Toyabe , Kenji Kirishima , Haruo Shibayama , Yuji Nakano , Hisaaki Shimauchi , Ichiro Matsunaga
发明人： Keiji Toyabe , Kenji Kirishima , Haruo Shibayama , Yuji Nakano , Hisaaki Shimauchi , Ichiro Matsunaga
CPC分类号： C22B7/009 , B01J38/60 , B09B3/0016 , B09B3/0058 , B09B3/0083 , Y02P10/214
摘要： A process for dissolving used catalyst includes the steps of roasting, after subjecting to an optional deoiling treatment, the used catalyst at a temperature lower than 1,000.degree. C. but not lower than the temperature at which any of the residual components in the used catalyst undergoes ignition and combustion where the residual components are selected from the group consisting of oils, sulfur components, and carbon components; and dissolving the roasted product using sulfuric acid after adding a metal to the roasted product as a catalyst for accelerating dissolution. The process provides a simple and efficient method for completely dissolving a used catalyst having a carrier containing alumina as the principal component.
摘要翻译： 用于溶解所用催化剂的方法包括在低于1000℃但不低于使用的催化剂中的任何残余组分经历的温度下经过任选的脱油处理焙烧所用催化剂的步骤 点火和燃烧，其中残余组分选自油，硫组分和碳组分; 并在加入金属作为加速溶解的催化剂的焙烧产物之后用硫酸溶解焙烧产物。 该方法提供了一种用于完全溶解具有含有氧化铝的载体作为主要成分的用过的催化剂的简单有效的方法。
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公开(公告)号：US5503812A
公开(公告)日：1996-04-02
申请号：US302895
申请日：1994-09-19
CPC分类号： C22B11/042 , C01G55/001 , Y02P10/214
摘要： Fission noble metals contained in an insoluble residue and/or a high-level radioactive liquid waste generated in the step of reprocessing spent nuclear fuels are dissolved in nitric acid to prepare a palladium-containing nitric acid solution, which is then brought into liquid-liquid contact with an extracting solvent containing a dialkyl sulfide in which each alkyl group has 4 to 10 carbon atoms as an extractant to extract the palladium component into the extracting solvent. The palladium-containing extracting solvent is brought into liquid-liquid contact with an aqueous thio compound solution or aqueous ammonia solution to strip the palladium component into the aqueous solution. A borohydride compound in added to the palladium-containing aqueous solution to precipitate palladium from this solution by reduction, and metallic palladium is recovered by separating the precipitate from the aqueous solution.
摘要翻译： PCT No.PCT / JP93 / 01332 Sec。 371日期1994年9月19日 102（e）1994年9月19日PCT 1993年9月17日提交。在废核燃料后处理步骤中产生的不溶性残渣和/或高放射性废液中含有的贵金属溶解在硝酸 制备含钯硝酸溶液，然后将其与含有各自具有4〜10个碳原子的烷基的二烷基硫醚的萃取溶剂进行液 - 液接触，作为萃取剂，将钯组分萃取到萃取溶剂中 。 将含钯萃取溶剂与硫代化合物水溶液或氨水溶液液液接触以将钯组分剥离成水溶液。 将硼氢化合物加入到含钯水溶液中，通过还原从该溶液中沉淀钯，通过从水溶液中分离出沉淀物来回收金属钯。
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3.发明授权
公开(公告)号：US4374807A
公开(公告)日：1983-02-22
申请号：US169830
申请日：1980-07-17
CPC分类号： C01G43/025 , C01F7/50 , C22B60/026
摘要： In a process for converting UF.sub.6 into UO.sub.2, the UF.sub.6 is brought into contact with an aqueous aluminum nitrate solution. The resultant product is solvent extracted with tributyl phosphate to remove uranyl nitrate. The raffinate has a fluorine/aluminum (F/Al) weight ratio within the range of from about 0.5 to about 1.2. A sufficient quantity of hydrofluoric acid is added to the raffinate to minimize the solubility of aluminum fluoride (AlF.sub.3) therein and thereby maximize the precipitation potential of AlF.sub.3. Generally this occurs when sufficient hydrofluoric acid has been added to cause the F/Al weight ratio to be within the range of from about 1.8 to about 2.2. As a result of this treatment, the raffinate is divided into an uranium-containing aqueous solution and an AlF.sub.3 precipitate which contains substantially no uranium.
摘要翻译： 在将UF6转化成UO2的过程中，UF6与硝酸铝水溶液接触。 所得产物用磷酸三丁酯溶剂萃取以除去硝酸铀酰。 萃余液的氟/铝（F / Al）重量比在约0.5至约1.2的范围内。 向剩余物中加入足够量的氢氟酸以使其中的氟化铝（AlF 3）的溶解度最小化，从而使AlF 3的沉淀电位最大化。 通常，当加入足够的氢氟酸以使F / Al重量比在约1.8至约2.2的范围内时，会发生这种情况。 作为该处理的结果，将残液分为含铀水溶液和基本上不含铀的AlF 3沉淀物。
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