CN100410395C - Recovery method of rhodium - Google Patents
Recovery method of rhodium Download PDFInfo
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- CN100410395C CN100410395C CNB2006101074489A CN200610107448A CN100410395C CN 100410395 C CN100410395 C CN 100410395C CN B2006101074489 A CNB2006101074489 A CN B2006101074489A CN 200610107448 A CN200610107448 A CN 200610107448A CN 100410395 C CN100410395 C CN 100410395C
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- rhodium
- formic acid
- black
- recovery method
- reduction
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- 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
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Abstract
The present invention relates to a rhodium recycle method, adding 2.5-5.0 equivalent formic acid relative to theory quantity in the need of formic acid deoxidize rhodium in the process of adding formic acid in ammonium hexachlororhodium solution to deoxidize recycle rhodium, then filtrating to recycle black rhodium at 98% high recovery rate. The invention can recycle black rhodium with high recovery rate by using formic acid to deoxidize rhodium in ammonium hexachlororhodium solution, then sintering recycle black rhodium with reductive and high quality sponginess rhodium is obtained.
Description
Technical field
The present invention relates to a kind of method that from chlordene rhodium acid ammonium solution, reclaims the solid rhodium by interpolation formic acid.
Background technology
In special fair 1-30896 " from the solution that contains precious metal, extracting the method for precious metal ", disclose by in chlordene rhodium acid ammonium solution, adding the method that formic acid reclaims the rhodium of rhodium black form.But, detailed reductive condition is not wherein disclosed.
Discoveries such as the inventor are being reclaimed under the situation of rhodium with the formic acid reduction, and there is maximum value with respect to the addition of formic acid in the rate of recovery of rhodium in a certain scope.
[patent documentation 1]
Special fair 1-30896 " extracts the method for precious metal " from the solution that contains precious metal.
Summary of the invention
The purpose of this invention is to provide the method that reclaims rhodium with high yield, wherein, from chlordene rhodium acid ammonium solution, reclaim the solid rhodium by adding formic acid.
To achieve the above object, the present inventor waits and has made following invention.That is, the invention provides:
(1) a kind of recovery method of rhodium, wherein, reducing and reclaiming in the process of rhodium by in chlordene rhodium acid aqueous ammonium, adding formic acid, with respect to reduce the required theoretical amount of rhodium with formic acid, add the formic acid of 2.5～5.0 times of amounts, filter after the reduction, reclaim the solid rhodium with the high yield more than 98% thus.(2) according to the recovery method of the rhodium described in (1), wherein the addition with formic acid is made as 2.5～3.0 times of amounts, reclaims the solid rhodium with the high yield more than 99% thus.
(3) according to the recovery method of (1) or (2) rhodium described in each, the temperature when wherein reducing is 85 ℃～95 ℃.
(4) according to the recovery method of each described rhodium in (1) to (3), wherein, under reducing atmosphere, the rhodium black through reclaiming gained is burnt till, obtain spongy rhodium.
In the rhodium recovery method of the present invention,, can reclaim the solid rhodium with the high yield more than 98% by selected suitable formic acid addition in interpolation formic acid in chlordene rhodium acid aqueous ammonium reduces the process that reclaims rhodium.
Description of drawings
Fig. 1 represents a kind of form of the reduction recovery process of rhodium.
Fig. 2 represents the rate of recovery with the corresponding rhodium of formic acid addition.
Embodiment
Below the present invention will be described in detail.
Discoveries such as the inventor are being reclaimed under the situation of rhodium with the formic acid reduction, and with respect to the addition of formic acid, there is maximum value in the rate of recovery of rhodium in a certain scope.
Usually, come under the situation of the metal in the reducing solution, in order to reclaim metal with high yield, the general reductive agent that becomes 1 times～several times with respect to the necessary theoretical amount of reduction that adds at the various reductive agents of interpolation.This is because exist in the reductive agent that is added the inoperative part of the reduction of metal target, therefore before reaching the target reduction ratio, needs to increase the addition of reductive agent.In addition,,, revert back yield and also can reach capacity, keep steady state value even excessively add reductive agent under then a lot of situation if surpass certain scope.
The formic acid that adds in chlordene rhodium acid ammonium solution among the present invention reduces rhodium and obtaining in the process of rhodium black, before the addition of formic acid reaches 3 times of amounts, reduction ratio is rising always, if but will be made as maximum value and the further addition that increases formic acid corresponding to the reduction ratio of 3 times of amounts, then reduction ratio could descend on the contrary.Reason wherein is not clear, is known that formic acid and metal can form coordination compound, therefore may be to add after the excessive formic acid, and rhodium and formic acid have formed coordination compound, thereby have caused rhodium to be not easy to be reduced.
The temperature of liquid during reduction is preferably 85 ℃～95 ℃.Its reason is, temperature is during less than 85 ℃, formic acid carries out slowly to the reduction reaction of rhodium, cause reaction being not easy to carry out, thereby make that the reduction ratio of rhodium is low, temperature is more than 95 ℃ the time, because the boiling point (with the azeotropic point of water) of formic acid is 107 ℃, the volatile quantity of formic acid can increase, and causes the ratio of formic acid that reduction is worked to reduce, thereby makes the reduction ratio of rhodium also descend.
Also have, after the rhodium that washing is reclaimed, a part of rhodium can dissolve, and this may be that a part of rhodium has become chlordene rhodium acid ammonium precipitation because be different from the reduction reaction as the rhodium black of precipitated metal.
The rhodium of this recovery no matter whether through washing, can be under reducing atmosphere, for example hydrogen atmosphere obtains spongy rhodium through burning till.
The temperature of burning till processing is 750 ℃～850 ℃, removes residual oxygen thus, obtains the spongy rhodium of 99.99 quality %.
The present invention will be described according to schema shown in Figure 1.In the analysis of embodiment and comparative example, use ICP Emission Spectrophotometer device during analytical solution, use the glow discharge quality analysis apparatus when spongy rhodium is analyzed.
Embodiment 1
As raw material, used the chlordene rhodium acid ammonium solution shown in the table 1 of rhodium-containing metal in addition hardly.
Table 1
In order to prevent the precipitation of chlordene rhodium acid ammonium, the liquid temperature before reducing is made as 60 ℃, and calculates with the needed formic acid theoretical amount of formic acid reduction rhodium according to following reaction formula, add the formic acid that is equivalent to its 3 times of amounts afterwards, 90 ℃ were heated 1 hour down.
2(NH
4)
3[RhCl
6]+3HCOOH→2Rh+6HCl+6NH
4Cl+3CO
2
Then, place one evening of cooling under the room temperature, carry out vacuum filtration, obtain sedimentary rhodium and reduce rear filtrate with the membrane filter of 0.1 μ m.Calculated the rate of recovery of the rhodium of this moment with following formula.
Rh amount (g) * 100 before the rhodium rate of recovery (%)=(the Rh amount (g) in the Rh amount (g) before the reduction in the liquid-reduction rear filtrate) ÷ reduction in the liquid
The analytical value of the liquid after the reduction of this moment is listed in table 2.The rate of recovery of rhodium is 99.7%.
Table 2
[embodiment 2 and comparative example]
Used the chlordene rhodium acid ammonium solution shown in the table 1 as raw material, adopted the condition identical with embodiment 1, the addition that only changes formic acid reduces, and the analytical value of the reduction rear filtrate of gained and the rate of recovery of rhodium are shown in Table 3.
Table 3
The rate of recovery with the corresponding rhodium of formic acid addition of embodiment 1, embodiment 2 and comparative example is shown in Fig. 2.As can be seen from the figure,, the rhodium rate of recovery more than 98% can be obtained, and then, the rate of recovery of the rhodium more than 99% can be obtained by the formic acid addition being made as 2.5～3.0 times of amounts of theoretical amount by the formic acid addition being made as 2.5～5.0 times of amounts of theoretical amount.
Embodiment 3
The rhodium black that obtains among the embodiment 1 under hydrogen atmosphere, is reduced in 800 ℃ and to burn till, obtained spongy rhodium.By burning till, can remove residual oxygen basically, and then analyze the impurity (according to the atom sequence number from the lithium to uranium, wherein except rhodium and the rare gas element) of 72 compositions with GDMS, the result shows that having obtained total impurities is the above rhodium of 99.99 quality % of 84ppm.
As mentioned above,, can under free of contamination condition, from chlordene rhodium acid ammonium solution, reclaim rhodium black, burn till resulting rhodium black afterwards, just can reclaim high-quality spongy rhodium with high yield by embodiment 1,2,3.
Claims (5)
1. the recovery method of a rhodium, it is characterized in that, reducing and reclaiming in the process of rhodium by in chlordene rhodium acid aqueous ammonium, adding formic acid, with respect to reduce the required theoretical amount of rhodium with formic acid, add the formic acid of 2.5～5.0 times of amounts, filter after the reduction, the high yield with more than 98% reclaims as rhodium black.
2. the recovery method of rhodium according to claim 1 is characterized in that, the addition of formic acid is made as 2.5～3.0 times of amounts, and the high yield with more than 99% reclaims as rhodium black.
3. the recovery method of rhodium according to claim 1 and 2 is characterized in that, the temperature during reduction is 85 ℃～95 ℃.
4. the recovery method of rhodium according to claim 1 and 2 is characterized in that, under hydrogen atmosphere the rhodium black that reclaims is burnt till, and obtains spongy rhodium.
5. the recovery method of rhodium according to claim 3 is characterized in that, under hydrogen atmosphere the rhodium black that reclaims is burnt till, and obtains spongy rhodium.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2005350386 | 2005-12-05 | ||
| JP2005350386A JP4188365B2 (en) | 2005-12-05 | 2005-12-05 | Recovery method of rhodium |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1978678A CN1978678A (en) | 2007-06-13 |
| CN100410395C true CN100410395C (en) | 2008-08-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006101074489A Expired - Fee Related CN100410395C (en) | 2005-12-05 | 2006-07-26 | Recovery method of rhodium |
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| JP (1) | JP4188365B2 (en) |
| CN (1) | CN100410395C (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4268646B2 (en) * | 2007-03-30 | 2009-05-27 | 日鉱金属株式会社 | Recovery method of rhodium |
| EP3064602A1 (en) * | 2015-03-05 | 2016-09-07 | Heraeus Deutschland GmbH & Co. KG | Method for the production of elemental rhodium |
| CN112481494A (en) * | 2019-09-12 | 2021-03-12 | 中国石油化工股份有限公司 | Method for recovering rhodium from residual liquid of waste rhodium catalyst in oxo synthesis reaction |
| CN113020615A (en) * | 2021-03-03 | 2021-06-25 | 中海油(山西)贵金属有限公司 | Method for preparing high-purity rhodium powder by using rhodium trichloride |
| CN114178540B (en) * | 2021-10-18 | 2023-09-15 | 英特派铂业股份有限公司 | Quick and low-loss reduction method of potassium hexanitrosorhodium |
| CN114105230A (en) * | 2021-12-21 | 2022-03-01 | 浙江微通催化新材料有限公司 | Preparation method of rhodium trichloride hydrate |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0130896B2 (en) * | 1980-09-05 | 1989-06-22 | Inco Ltd | |
| CN1016707B (en) * | 1987-08-13 | 1992-05-20 | 中国有色金属工业总公司昆明贵金属研究所 | Method for dissolving and purifying crude rhodium and alloy waste with high rhodium content |
| JPH10226828A (en) * | 1997-02-18 | 1998-08-25 | Sumitomo Metal Mining Co Ltd | Method for refining rhodium from rhodium-containing precipitate |
-
2005
- 2005-12-05 JP JP2005350386A patent/JP4188365B2/en active Active
-
2006
- 2006-07-26 CN CNB2006101074489A patent/CN100410395C/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0130896B2 (en) * | 1980-09-05 | 1989-06-22 | Inco Ltd | |
| CN1016707B (en) * | 1987-08-13 | 1992-05-20 | 中国有色金属工业总公司昆明贵金属研究所 | Method for dissolving and purifying crude rhodium and alloy waste with high rhodium content |
| JPH10226828A (en) * | 1997-02-18 | 1998-08-25 | Sumitomo Metal Mining Co Ltd | Method for refining rhodium from rhodium-containing precipitate |
Non-Patent Citations (1)
| Title |
|---|
| 平1-30896B 1989.06.21 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1978678A (en) | 2007-06-13 |
| JP4188365B2 (en) | 2008-11-26 |
| JP2007154252A (en) | 2007-06-21 |
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