JP2001335855A - Method for recovering platinum from waste catalyst - Google Patents
Method for recovering platinum from waste catalystInfo
- Publication number
- JP2001335855A JP2001335855A JP2000154246A JP2000154246A JP2001335855A JP 2001335855 A JP2001335855 A JP 2001335855A JP 2000154246 A JP2000154246 A JP 2000154246A JP 2000154246 A JP2000154246 A JP 2000154246A JP 2001335855 A JP2001335855 A JP 2001335855A
- Authority
- JP
- Japan
- Prior art keywords
- leaching
- platinum
- catalyst
- stage
- waste catalyst
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 title claims abstract description 73
- 229910052697 platinum Inorganic materials 0.000 title claims abstract description 36
- 238000000034 method Methods 0.000 title claims abstract description 35
- 239000003054 catalyst Substances 0.000 title claims abstract description 33
- 239000002699 waste material Substances 0.000 title claims abstract description 12
- 238000002386 leaching Methods 0.000 claims abstract description 63
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims abstract description 14
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 12
- 229910052878 cordierite Inorganic materials 0.000 claims description 7
- JSKIRARMQDRGJZ-UHFFFAOYSA-N dimagnesium dioxido-bis[(1-oxido-3-oxo-2,4,6,8,9-pentaoxa-1,3-disila-5,7-dialuminabicyclo[3.3.1]nonan-7-yl)oxy]silane Chemical compound [Mg++].[Mg++].[O-][Si]([O-])(O[Al]1O[Al]2O[Si](=O)O[Si]([O-])(O1)O2)O[Al]1O[Al]2O[Si](=O)O[Si]([O-])(O1)O2 JSKIRARMQDRGJZ-UHFFFAOYSA-N 0.000 claims description 7
- 238000011084 recovery Methods 0.000 claims description 6
- 239000012535 impurity Substances 0.000 abstract description 4
- 239000010845 automotive waste Substances 0.000 abstract 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 16
- 239000000306 component Substances 0.000 description 14
- QZPSXPBJTPJTSZ-UHFFFAOYSA-N aqua regia Chemical compound Cl.O[N+]([O-])=O QZPSXPBJTPJTSZ-UHFFFAOYSA-N 0.000 description 8
- 239000007788 liquid Substances 0.000 description 8
- 238000000926 separation method Methods 0.000 description 6
- 239000000126 substance Substances 0.000 description 6
- 229910052684 Cerium Inorganic materials 0.000 description 5
- 229910052782 aluminium Inorganic materials 0.000 description 5
- 238000003756 stirring Methods 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000000758 substrate Substances 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 150000007513 acids Chemical class 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- GWXLDORMOJMVQZ-UHFFFAOYSA-N cerium Chemical compound [Ce] GWXLDORMOJMVQZ-UHFFFAOYSA-N 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 238000005868 electrolysis reaction Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
- 239000003929 acidic solution Substances 0.000 description 1
- DIZPMCHEQGEION-UHFFFAOYSA-H aluminium sulfate (anhydrous) Chemical compound [Al+3].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O DIZPMCHEQGEION-UHFFFAOYSA-H 0.000 description 1
- CETPSERCERDGAM-UHFFFAOYSA-N ceric oxide Chemical compound O=[Ce]=O CETPSERCERDGAM-UHFFFAOYSA-N 0.000 description 1
- 229910000422 cerium(IV) oxide Inorganic materials 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000003426 co-catalyst Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000010842 industrial wastewater Substances 0.000 description 1
- 239000012533 medium component Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- 239000008188 pellet Substances 0.000 description 1
- 238000010926 purge Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Landscapes
- Processing Of Solid Wastes (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、廃触媒から有価物を回
収する方法に関するものであり、更に詳しく述べると自
動車排気ガス浄化用廃触媒から有価物である白金を湿式
処理により回収する方法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for recovering valuable materials from waste catalysts, and more particularly to a method for recovering platinum, which is valuable materials, from waste catalysts for purifying automobile exhaust gas by wet treatment. Things.
【０００２】[0002]
【従来の技術】廃触媒からの有価物回収方法は大きく分
けて、乾式法と湿式法がある。乾式法は、廃触媒を溶剤
と共に加熱溶解炉に装入し、更に有価物である白金を捕
集するため銅等の金属を装入する。銅等の金属に捕集さ
れた白金は、浸出あるいは電解により濃縮され精製され
る。2. Description of the Related Art A method for recovering valuable resources from a spent catalyst is roughly classified into a dry method and a wet method. In the dry method, a spent catalyst is charged into a heating and melting furnace together with a solvent, and further a metal such as copper is charged to collect valuable platinum. Platinum collected by a metal such as copper is concentrated and purified by leaching or electrolysis.
【０００３】乾式法では、電解工程に数十日かかること
や、溶解炉排ガスによる環境問題、さらには熱エネルギ
ーを大量に消費するなどの問題点がある。[0003] In the dry method, there are problems such as that the electrolysis process takes several tens of days, environmental problems due to the exhaust gas from the melting furnace, and a large amount of heat energy is consumed.
【０００４】一方、湿式法は塩酸浸出法や王水浸出法等
が従来から知られている。これらは廃触媒をそのままあ
るいは適当な大きさに粉砕した後、王水等で常圧高温に
て浸出し、白金を含有した酸性溶液として回収してい
る。On the other hand, as the wet method, a hydrochloric acid leaching method, an aqua regia leaching method and the like have been conventionally known. These waste catalysts are leached at normal pressure and high temperature with aqua regia or the like after the spent catalyst is pulverized as it is or in an appropriate size, and recovered as an acidic solution containing platinum.
【０００５】塩酸浸出法や王水浸出法では、回収目的成
分（白金）以外の成分も同時に浸出されるため、浸出後
の白金との分離が問題となる。またこれらの浸出では、
王水や塩酸といった比較的高価な薬剤が、目的成分以外
にも消費される等の問題もある。[0005] In the hydrochloric acid leaching method or the aqua regia leaching method, components other than the recovery target component (platinum) are simultaneously leached, so that separation from platinum after leaching becomes a problem. Also in these leaches,
There is also a problem that relatively expensive drugs such as aqua regia and hydrochloric acid are consumed in addition to the target components.
【０００６】[0006]
【発明が解決しようとする課題】上記問題点を解決す
る、湿式法による白金の回収方法を提供するものであ
る。SUMMARY OF THE INVENTION An object of the present invention is to provide a method for recovering platinum by a wet method, which solves the above problems.
【０００７】[0007]
【課題を解決するための手段】本発明者らは方法の種々
の検討を行った結果、廃触媒からの白金回収方法とし
て、 （１）廃触媒に担持されている白金を湿式回収する方法
において、1段階目の浸出を７５％以上濃硫酸で行い白
金以外の成分を選択的に浸出分離し、ついで２段階目に
おいて主に白金を浸出する白金の回収方法。 （２）廃触媒が、自動車排気ガス浄化用触媒であり、ア
ルミナ製ペレット状担体またはコーディエライト製ハニ
カム構造を備える上記（１）記載の方法。 （３）１段階目の浸出条件が、液温７０℃以上、４時間
以上、パルプ濃度１２０ｇ／Ｌ以下である上記（１）記
載の方法。を提供する。Means for Solving the Problems As a result of various studies on the method, the present inventors have found that as a method for recovering platinum from a spent catalyst, (1) a method for recovering platinum carried on a spent catalyst by a wet method. A method of recovering platinum in which first stage leaching is performed with 75% or more of concentrated sulfuric acid to selectively leaching and separating components other than platinum, and then second stage leaching mainly of platinum. (2) The method according to the above (1), wherein the waste catalyst is a catalyst for purifying automobile exhaust gas, and is provided with an alumina pellet-shaped carrier or a cordierite honeycomb structure. (3) The method according to the above (1), wherein the first stage leaching conditions are a liquid temperature of 70 ° C. or more, 4 hours or more, and a pulp concentration of 120 g / L or less. I will provide a.
【０００８】[0008]
【作用】以下本発明の構成を詳しく説明する。なお構成
は例を挙げて説明しているが、本発明はこの例に制限さ
れるものではない。The structure of the present invention will be described below in detail. Although the configuration has been described using an example, the present invention is not limited to this example.
【０００９】本発明者らは、廃触媒からの白金回収につ
いて種々検討を行った結果、浸出を２段階で行うことに
より１段階目で回収目的成分（白金）以外の成分を選択
分離できるとの知見を得た。The present inventors have conducted various studies on the recovery of platinum from spent catalysts. As a result, it was found that by performing leaching in two stages, components other than the target component (platinum) to be recovered can be selectively separated in the first stage. Obtained knowledge.
【００１０】自動車排気ガス浄化用触媒の外観は、アル
ミナ製ペレット状担体またはコーディエライト製ハニカ
ム構造を備えるものとに大別される。現在使用されてい
るものの多くは後者である。このコーディエライト製ハ
ニカム構造を備える自動車触媒は、多数の貫通ガス道を
持ち（以下セルと称する）、このセル内を排気ガスが通
過することにより、排気ガスの浄化を行っている。セル
開口部は約１ｍｍ角であり、基材と触媒層から構成さ
れ、基材はコーディエライト（２ＭｇＯ・２Ａｌ ２Ｏ３
・５ＳｉＯ２ ）であり、そのガス通過側にγアルミナ
がウオッシュコートされている。このγアルミナ中に触
媒成分である白金や助触媒成分であるセリア（Ｃｅ
Ｏ２）等が担持されている。The appearance of an automobile exhaust gas purifying catalyst is
Mina pellet carrier or cordierite honeycomb
It is broadly divided into those with a memory structure. Currently used
Many of the latter are the latter. This cordierite
Autocatalysts with a honeycomb structure have many through gas paths.
(Hereinafter referred to as a cell), through which exhaust gas passes.
By purging, exhaust gas is purified. cell
The opening is about 1 mm square and consists of a substrate and a catalyst layer.
The base material is cordierite (2MgO.2Al 2O3
・ 5SiO2 ) And gamma alumina on the gas passage side
Is wash-coated. The contact in this gamma alumina
Platinum as a medium component and ceria (Ce as a promoter component)
O2) Etc. are carried.
【００１１】このγアルミナは、酸類に溶解することが
知られている。このため、廃触媒を塩酸浸出法や王水浸
出法等で浸出すると白金以外にγアルミナも浸出される
こととなり、後工程で白金との分離が問題となってく
る。また目的成分（白金）以外に酸類が消費されるた
め、予めγアルミナを除去することにより、目的成分
（白金）浸出時の使用薬剤低減を図ることも可能であ
る。This gamma alumina is known to dissolve in acids. Therefore, when the spent catalyst is leached by hydrochloric acid leaching method or aqua regia leaching method, γ-alumina is leached in addition to platinum, and the separation from platinum in a later step becomes a problem. In addition, since acids are consumed in addition to the target component (platinum), it is possible to reduce the chemicals used in leaching the target component (platinum) by removing γ-alumina in advance.
【００１２】廃触媒の１段階目浸出として濃硫酸浸出を
行うことにより、触媒層成分であるγアルミナと助触媒
成分であるセリウムを選択的に浸出除去可能との知見を
得た。このとき回収目的成分である白金や廃触媒基材で
あるコーディエライトは浸出されない。浸出されたγア
ルミナは硫酸アルミとなり蒸発濃縮することにより回収
され、工場排水の浄水剤としての使用が可能である。ま
た浸出後液は、濃硫酸浸出工程（１段階目）へ繰り返し
使用することができる。表１に硫酸濃度と浸出率結果を
示す。It has been found that by performing concentrated sulfuric acid leaching as the first stage leaching of the spent catalyst, it is possible to selectively leaching and removing γ-alumina as a catalyst layer component and cerium as a promoter component. At this time, platinum as a recovery target component and cordierite as a spent catalyst substrate are not leached. The leached γ-alumina becomes aluminum sulfate and is recovered by evaporation and concentration, and can be used as a water purification agent for industrial wastewater. The liquid after leaching can be repeatedly used in the concentrated sulfuric acid leaching step (first stage). Table 1 shows the results of sulfuric acid concentration and leaching rate.
【００１３】[0013]
【表１】 [Table 1]
【００１４】廃触媒中の全アルミニウムのうちγアルミ
ナが占める割合は、３０％であり、残りは触媒基材であ
るコーディエライト中のアルミニウムである。Ａｌの浸
出率が９７％Ｈ２ＳＯ４で２７．７％に達していること
から、γアルミナがほぼ浸出されている。したがって、
この濃硫酸浸出残渣に公知の塩酸浸出法や王水浸出法等
を適用することにより、白金以外の不純物濃度の少ない
白金含有浸出液を得ることが可能となる。The proportion of γ-alumina in the total aluminum in the spent catalyst is 30%, and the remainder is aluminum in cordierite, which is a catalyst substrate. Since the leaching rate of Al reached 27.7% with 97% H 2 SO 4 , γ alumina was almost leached. Therefore,
By applying a known hydrochloric acid leaching method or aqua regia leaching method to the concentrated sulfuric acid leaching residue, it becomes possible to obtain a platinum-containing leaching solution having a low impurity concentration other than platinum.
【００１５】濃硫酸浸出における液温は７０℃以上が好
ましく、更に詳細に述べると８０℃が好ましい。温度が
低いとAl及びCeの浸出率が低く、温度が８０℃を超える
と、Ce等の浸出率向上が期待できないばかりかエネルギ
ーのロスとなるため好ましくない。表２に液温を要因と
した場合の浸出率を示す。[0015] The liquid temperature in the concentrated sulfuric acid leaching is preferably 70 ° C or higher, and more preferably 80 ° C. If the temperature is low, the leaching rate of Al and Ce is low. If the temperature exceeds 80 ° C., not only the improvement of the leaching rate of Ce and the like cannot be expected, but also energy loss is not preferable. Table 2 shows the leaching rate based on the liquid temperature.
【表２】 [Table 2]
【００１６】濃硫酸浸出におけるパルプ濃度は１２０ｇ
／Ｌ以下が好ましく、更に詳細に述べると８０ｇ／Ｌが
好ましい。パルプ濃度が１６０ｇ／Ｌを超えると、Al及
びCeの浸出率が低下しPtの浸出率が高くなってくる。表
３にパルプ濃度を要因とした場合の浸出率結果を示す。The pulp concentration in the concentrated sulfuric acid leaching is 120 g.
/ L or less, more preferably 80 g / L. If the pulp concentration exceeds 160 g / L, the leaching rate of Al and Ce decreases and the leaching rate of Pt increases. Table 3 shows the leaching rate results when the pulp concentration is a factor.
【表３】 [Table 3]
【００１７】濃硫酸浸出における処理時間は４ｈｒ以上
が好ましく、更に詳細に述べると５ｈｒが好ましい。処
理時間が短いと、Al及びCe浸出率が上がらず、時間が５
ｈｒを超えると、Ce等の浸出率向上が望めないばかりか
熱エネルギーのロスとなる。表４に処理時間要因とした
場合の浸出率結果を示す。The treatment time in the concentrated sulfuric acid leaching is preferably 4 hours or more, more preferably 5 hours. If the treatment time is short, the leaching rate of Al and Ce does not increase,
When it exceeds hr, not only the improvement of the leaching rate of Ce or the like cannot be expected, but also a loss of heat energy. Table 4 shows the leaching rate results when the processing time factor is used.
【表４】 [Table 4]
【００１８】本発明により、自動車廃触媒中の触媒層成
分であるγアルミナ及び助触媒成分であるセリウムを選
択的に除去することが可能となり、更には白金浸出工程
での薬剤使用量を抑えることが可能となった。本発明で
得た１段階目濃硫酸浸出残渣を公知の塩酸浸出法や王水
浸出法等で浸出することにより効率的な白金回収が可能
である。According to the present invention, it is possible to selectively remove γ-alumina as a catalyst layer component and cerium as a co-catalyst component in an automobile waste catalyst, and further reduce the amount of chemicals used in the platinum leaching step. Became possible. By leaching the first-stage concentrated sulfuric acid leaching residue obtained in the present invention by a known hydrochloric acid leaching method or aqua regia leaching method, efficient platinum recovery is possible.
【００１９】以上説明したように、自動車廃触媒を２段
階に浸出することにより、1段階目浸出で白金以外の不
純物を選択的に取り除き、更には2段階目浸出で白金を
効率的に浸出回収する方法を確立した。As described above, by leaching the waste automobile catalyst in two stages, impurities other than platinum are selectively removed in the first stage leaching, and platinum is efficiently leached and recovered in the second stage leaching. Established a way to do it.
【００２０】以下本発明の実施例を説明する。なお本発
明は実施例に限定されるものではない。Hereinafter, embodiments of the present invention will be described. Note that the present invention is not limited to the embodiments.
【００２１】ハニカム構造を有する使用済み自動車廃触
媒を１６メッシュ以下（１ｍｍ以下）に粉砕し供試サン
プルとした。廃触媒のセル開口部寸法が約１ｍｍ角であ
り、セル内触媒層と浸出液との接触を考慮して１ｍｍ以
下に粉砕した。この供試サンプルの分析例を表５に示
す。A used automobile waste catalyst having a honeycomb structure was pulverized to 16 mesh or less (1 mm or less) to obtain a test sample. The cell opening size of the waste catalyst was about 1 mm square, and was crushed to 1 mm or less in consideration of the contact between the catalyst layer in the cell and the leachate. Table 5 shows an analysis example of the test sample.
【００２２】[0022]
【表５】 [Table 5]
【００２３】供試サンプル２０ｇを９７％Ｈ２ＳＯ４液
０．２５Ｌにリパルプし、８０℃×５ｈｒ攪拌放置し
た。処理終了後固液分離を行い、化学分析を実施し浸出
率を算出した。20 g of the test sample was repulped into 0.25 L of a 97% H 2 SO 4 solution, and the mixture was allowed to stand at 80 ° C. for 5 hours with stirring. After the treatment, solid-liquid separation was performed, and chemical analysis was performed to calculate the leaching rate.
【００２４】[0024]
【表６】 [Table 6]
【００２５】上記で得られた濃硫酸浸出残渣を2段階目
浸出として濃塩酸浸出して得られた結果を表７に示す。
なお浸出率結果は、供試サンプルを１００％としたとき
の分配率で表してある。Table 7 shows the results obtained by leaching the concentrated sulfuric acid leaching residue obtained above as a second stage leaching with concentrated hydrochloric acid.
The leaching rate results are represented by the distribution rate when the test sample is taken as 100%.
【表７】 [Table 7]
【００２６】[0026]
【比較例１】実施例と同一サンプル２０ｇを濃硝酸（６
３％）０．２５Lにリパルプし８０℃×５ｈｒ攪拌放置
した。処理終了後固液分離を行い、化学分析を実施し浸
出率を算出した。[Comparative Example 1] 20 g of the same sample as in the example was mixed with concentrated nitric acid (6
(3%) The pulp was repulped to 0.25 L and left to stir at 80 ° C. for 5 hours. After the treatment, solid-liquid separation was performed, and chemical analysis was performed to calculate the leaching rate.
【００２７】[0027]
【表８】 [Table 8]
【比較例２】[Comparative Example 2]
【００２８】実施例と同一サンプル２０ｇを濃塩酸（３
６％）０．２５Lにリパルプし８０℃×５ｈｒ攪拌放置
した。処理終了後固液分離を行い、化学分析を実施し浸
出率を算出した。20 g of the same sample as in the example was treated with concentrated hydrochloric acid (3
(6%) repulped to 0.25 L and left stirring at 80 ° C. × 5 hr. After the treatment, solid-liquid separation was performed, and chemical analysis was performed to calculate the leaching rate.
【００２９】[0029]
【表９】 [Table 9]
【比較例３】[Comparative Example 3]
【００３０】実施例と同一サンプル２０ｇを王水０．２
５Lにリパルプし８０℃×５ｈｒ攪拌放置した。処理終
了後固液分離を行い、化学分析を実施し浸出率を算出し
た。20 g of the same sample as in the above example was aqua regia 0.2
It was repulped to 5 L and left to stir at 80 ° C. × 5 hr. After the treatment, solid-liquid separation was performed, and chemical analysis was performed to calculate the leaching rate.
【００３１】[0031]
【表１０】 [Table 10]
【００３２】[0032]
【発明の効果】以上説明したように、本発明により自動
車廃触媒を２段階に浸出することによって、1段階目浸
出で白金以外の不純物を選択的に取り除き、更には2段
階目浸出で白金を効率的に浸出回収することが可能とな
った。As described above, by leaching the waste automobile catalyst in two stages according to the present invention, impurities other than platinum are selectively removed in the first stage leaching, and platinum is further removed in the second stage leaching. The leaching and collection can be performed efficiently.
【図1】本発明の処理フロー一態様を示す。FIG. 1 shows one embodiment of a processing flow of the present invention.
フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ テーマコート゛(参考） // Ｃ２２Ｂ 21/00 Ｃ２２Ｂ 11/04 59/00 Ｂ０９Ｂ 3/00 ３０４Ｌ Continued on the front page (51) Int.Cl. 7 Identification symbol FI Theme coat II (reference) // C22B 21/00 C22B 11/04 59/00 B09B 3/00 304L
Claims (3)
る方法において、1段階目の浸出を７５％以上濃硫酸で
行い白金以外の成分を選択的に浸出分離し、ついで２段
階目において主に白金を浸出することを特徴とする白金
の回収方法。1. A method for wet recovery of platinum carried on a spent catalyst, wherein the first stage of leaching is performed with 75% or more of concentrated sulfuric acid to selectively leaching and separating components other than platinum. A platinum recovery method characterized by mainly leaching platinum.
り、アルミナ製ペレット状担体またはコーディエライト
製ハニカム構造を備えることを特徴とする請求項１に記
載の方法。2. The method according to claim 1, wherein the waste catalyst is a catalyst for purifying automobile exhaust gas, and is provided with a pelletized carrier made of alumina or a honeycomb structure made of cordierite.
４時間以上、パルプ濃度１２０ｇ／Ｌ以下であることを
特徴とする請求項１に記載の方法。3. The leaching condition of the first stage is as follows:
The method according to claim 1, wherein the pulp concentration is 120 g / L or less for 4 hours or more.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012219314A (en) * | 2011-04-07 | 2012-11-12 | Okuchi Denshi Kk | Method for recovering platinum from blasting powder |
| JP2012241198A (en) * | 2011-05-16 | 2012-12-10 | Dowa Holdings Co Ltd | Method for recovering platinum group metal from blasting sand containing platinum group metal |
| KR101419744B1 (en) * | 2013-02-26 | 2014-07-17 | 한국지질자원연구원 | Enrichment and recovery method of valuable metals from spent automotive catalysts |
| CN108315564A (en) * | 2017-12-28 | 2018-07-24 | 核工业北京化工冶金研究院 | The method that a kind of molten carrier recycles platinum from aluminium-based catalyst |
-
2000
- 2000-05-25 JP JP2000154246A patent/JP3550528B2/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012219314A (en) * | 2011-04-07 | 2012-11-12 | Okuchi Denshi Kk | Method for recovering platinum from blasting powder |
| JP2012241198A (en) * | 2011-05-16 | 2012-12-10 | Dowa Holdings Co Ltd | Method for recovering platinum group metal from blasting sand containing platinum group metal |
| KR101419744B1 (en) * | 2013-02-26 | 2014-07-17 | 한국지질자원연구원 | Enrichment and recovery method of valuable metals from spent automotive catalysts |
| CN108315564A (en) * | 2017-12-28 | 2018-07-24 | 核工业北京化工冶金研究院 | The method that a kind of molten carrier recycles platinum from aluminium-based catalyst |
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| Publication number | Publication date |
|---|---|
| JP3550528B2 (en) | 2004-08-04 |
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