CN87100620A - The production method of cerous hydroxide - Google Patents
The production method of cerous hydroxide Download PDFInfo
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- CN87100620A CN87100620A CN87100620.0A CN87100620A CN87100620A CN 87100620 A CN87100620 A CN 87100620A CN 87100620 A CN87100620 A CN 87100620A CN 87100620 A CN87100620 A CN 87100620A
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Abstract
A kind of method of producing cerous hydroxide, its feature comprises that an acidic aqueous solution that contains cerium and cerium rare earth element in addition is divided into two batches, alkali metal hydroxide or ammonia are joined in first (1), separate the solid generated, this solid is added in company with oxygenant in second batch (2) of batch-wise solution to generate the solid hydrogen cerium oxide.
Description
The present invention relates to a kind of production method of cerous hydroxide.More particularly, it relate to a kind of from the acidic aqueous solution that contains the rare earth element beyond cerium and the cerium method of separation of hydrogen cerium oxide.
Method as separation of hydrogen cerium oxide a kind of acidic aqueous solution (following will being called briefly " raw material earth solution ") of the rare earth element beyond containing cerium and cerium it is believed that it is that a kind of oxygenant and rare earth metal hydroxide are joined (Japanese publication No. 96526/1985) in the raw material earth solution.
In the method, as rare earth metal hydroxide referred lanthanum hydroxide, neodymium hydroxide Neodymium trihydroxide, praseodymium hydroxide, samaric hydroxide, gadolinium hydroxide, yttrium hydroxide and their mixture thereof arranged, then used lanthanum hydroxide in an embodiment.Yet, this method industrial be disadvantageous, this be because rare earth metal hydroxide must be prepared respectively.
On the other hand, also having a kind of known method, wherein is the rare earth metal hydroxide that obtains from a part of earth solution after oxygenant and the separating cerium to be joined the raw material earth solution go (Japanese publication No. 96527/1985).But according to this on the one hand, a part of product after the separating cerium will carry out recirculation, and be used for recirculation amount will up to the separated cerium of desire etc. the gram molecular weight level.Therefore this method exists the drawback of production efficiency difference.
The present inventor has carried out deep research to seek a kind of method that obtains cerous hydroxide with high production efficiency from the raw material earth solution.Found that and to adopt the simple operations of certain specific program to obtain cerous hydroxide by a kind of.The present invention finishes on the basis of this discovery.
That is, the objective of the invention is and to produce cerous hydroxide in industrial favourable mode.This purpose can realize by the method for production cerous hydroxide of the present invention, comprising the acidic aqueous solution that contains cerium and cerium rare earth element in addition is divided into two batches, alkali metal hydroxide or ammonia are added first solution (1), separate the solid generated, then this solid and a kind of oxygenant are joined second batch of solution of batch-wise (2) thus in form the solid hydrogen cerium oxide.
Raw material earth solution used in the present invention is a kind of rare earth element acidic aqueous solution of lanthanum, praseodymium, neodymium or the like for example that contains beyond cerium and the cerium.
Rare earth element preferably is the form of muriate or nitrate.Acidity preferably is in pH value and is 6 level to the maximum, better is 3～5.
Come the present invention is explained in detail referring now to accompanying drawing.
Fig. 1 is the schema that a specific embodiment of the inventive method has been described.
Above-mentioned raw materials rare earth solution is divided into two batches. First (1) is introduced in solid and forms operation, and second batch (2) is introduced in mixed processes.
That this step that is divided into two batches preferably is performed such so that making the amount of first (1) is 0.5～2 times of amount of second batch (2), be better 0.8～1.5 times. If this ratio is too high, then the purity of the cerium hydroxide that generates just trends towards low. On the other hand, if this ratio is excessively low, although the purity of the cerium hydroxide that generates improves, its output will be low.
Form in the operation at solid, be added in first (1) to generate the rare earth metal hydroxide of solid such as NaOH or such alkali metal hydroxide or the ammonia of potassium hydroxide. Thereby alkali metal hydroxide is to be used with ormal weight to make the pH value of solution be at least 10, is preferably 11～13.
Form in the operation at this solid, the adding of oxidant is not main. Yet if oxidant exists, that just might reduce the amount of oxidant in the later mixed processes. In addition, employed oxidant does not require it is strong oxidizer in solid-formation operation, can be oxygen containing gas such as air. So, preferably in this operation, add oxidant. The amount of oxidant preferably makes 1～50 gram molecule that the trivalent cerium hydroxide in first (1) changes into the required theoretical amount of tetravalence cerium hydroxide doubly.
The solid that is generated is a rare earth metal hydroxide.When a kind of oxygenant was used, cerous hydroxide was that the form that is in oxidation is the tetravalence form.Filtrate (1) is the aqueous solution that contains corresponding to the alkali metal salts or ammonium salt of the acid of acid groups in the raw material earth solution.
In mixed processes, form the solid and a kind of oxygenant that obtain in the operation at above-mentioned solid and be introduced in second batch (2) and mixing.Here employed oxygenant is had no particular limits, as long as it can make tervalent cerous hydroxide change into the quaternary cerous hydroxide.For example, can use hydrogen peroxide or perchloric acid.The amount of using is that the trivalent cerous hydroxide in the mixed processes system is changed into the required theoretical amount of tetravalence cerous hydroxide at least, and preferably 1～2 mol of this theoretical amount doubly.
There is not special qualification in order by merging to above-mentioned three kinds of components.Yet preferably after being mixed, batch of material (2) and solid add oxygenant, so that avoid the excessive decomposition of oxygenant.Temperature is up to 50 ℃ usually, is preferably room temperature to 40 ℃.
Then, this mixture is heated to 40～100 ℃ temperature, is preferably 60～80 ℃, and reaction was then carried out under agitation condition 1～10 hour, was preferably 2～6 hours.
Through this operation, the oxyhydroxide of the rare earth element in the solid beyond the cerium is with dissolved, and solid will be a solid tetravalence cerous hydroxide with the cerium of criticizing in (2), and its separates the acidic aqueous solution that obtains highly purified cerous hydroxide and cerium rare earth element in addition through filtering.
Now, the present invention will be described in more detail with reference to embodiment.Yet must understand that the present invention is not subjected to the restriction of this specific examples.
Embodiment
11m as first indication of table 1
3The raw material earth solution by batch (1): the ratio of batch (2)=6: 5 is divided into two batches.In batch (1), add 4m
320% aqueous sodium hydroxide solution, simultaneously with 150m
3/ hour the speed input air, under 40 ℃, this mixture carried out 2 hours stirring then, thereby and stirs down at 70 ℃ and to form a kind of solid in 3 hours.
The mixture that generates becomes the solid of rare earth metal hydroxide by filtering separation and contains the filtrate of sodium-chlor.
Be mixed in batch (2) and suspension there through isolating solid like this.Then with 1 hour time and at 40 ℃ of aqueous hydrogen peroxide solutions that add down 78.5 liter 50% in this suspension, follow this mixture and be heated to 70 ℃ and accept 3 hours reaction.
Thereby this reaction mixture is filtered solid hydrogen cerium oxide that the rare earth that obtained to have the 2nd indication of table 1 forms and as the acidic aqueous solution as rare earth element beyond the cerium of the 3rd indication of table 1 of filtrate (2).
Table 1
The method according to this invention just can be produced cerous hydroxide with industrial favourable mode, and this is because do not needed to prepare respectively the rare earth metal hydroxide of required use, does not also need product is carried out recirculation.Moreover, simply by the ratio that is divided into two batches is just changed and can easily adjust to required level to the concentration of cerous hydroxide.Therefore, method of the present invention is a kind of outstanding method.
Claims (10)
1, a kind of method of producing cerous hydroxide, its feature comprises that the acidic aqueous solution of rare earth element is divided into two batches beyond cerium and the cerium containing, alkali metal hydroxide or ammonia are joined in first (1), separate the solid generated, this solid is joined in company with oxygenant in second batch (2) of solution in batches to generate the solid hydrogen cerium oxide.
2, method according to claim 1 is characterized in that said to be divided into two batches of amounts that must make first (1) be 0.5～2 times of second batch (2) amount.
3, method according to claim 1 is characterized in that said to be divided into two batches of amounts that must make first (1) be 0.8～1.5 times of second batch (2) amount.
4, method according to claim 1 is characterized in that oxygenant joins in first (1) in company with alkali metal hydroxide or ammonia.
5, method according to claim 4 is characterized in that oxygenant is oxygen containing gas.
6, method according to claim 1 is characterized in that containing the pH value that the acidic aqueous solution of the rare earth element beyond cerium and the cerium has and is 6 to the maximum, is the muriate of rare earth element or the aqueous solution of nitrate.
7, method according to claim 1, the add-on that it is characterized in that alkaline earth metal hydroxides or ammonia should make the pH value after the adding be at least 10.
8, method according to claim 1, it is characterized in that second batch (2) with add oxygenant again after the solid that obtains from first (1) mixes.
9, method according to claim 1, the amount with second batch of (2) blended oxygenant of it is characterized in that are to make 1 to 2 mol that trivalent cerous hydroxide in the system changes into the required theoretical amount of tetravalence cerous hydroxide doubly.
10, method according to claim 1, the mixture that it is characterized in that containing the solid that derives from first (1), oxygenant and second batch (2) are reacted under 40～100 ℃ temperature and stirring condition and are reached 1～10 hour.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61033493A JPS62191422A (en) | 1986-02-18 | 1986-02-18 | Production of cerium hydroxide |
| JP33493/86 | 1986-02-18 | ||
| JP33493/1986 | 1986-02-18 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN87100620A true CN87100620A (en) | 1987-08-26 |
| CN1009641B CN1009641B (en) | 1990-09-19 |
Family
ID=12388080
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 87100620 Expired CN1009641B (en) | 1986-02-18 | 1987-02-07 | Process for producing cerium hydroxide |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JPS62191422A (en) |
| CN (1) | CN1009641B (en) |
| BR (1) | BR8700728A (en) |
| MY (1) | MY102131A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1114564C (en) * | 1999-04-01 | 2003-07-16 | 张其春 | Technological process of preparing pure cerium hydroxide |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100453552B1 (en) * | 2001-12-26 | 2004-10-20 | 한국지질자원연구원 | A method for manufacturing of cerium hydroxide removal of fluoride from the bastnasite |
| US20140341790A1 (en) | 2013-01-18 | 2014-11-20 | Rare Element Resources Ltd. | Extraction of metals from metallic compounds |
| CN103910373B (en) * | 2014-04-04 | 2016-05-18 | 江西稀有金属钨业控股集团有限公司 | A kind of preparation method of cerium hydroxide and system |
| WO2015191645A1 (en) * | 2014-06-09 | 2015-12-17 | Rare Element Resources, Ltd. | Selective extraction of cerium from other metals |
-
1986
- 1986-02-18 JP JP61033493A patent/JPS62191422A/en active Pending
-
1987
- 1987-02-07 CN CN 87100620 patent/CN1009641B/en not_active Expired
- 1987-02-12 MY MYPI87000136A patent/MY102131A/en unknown
- 1987-02-17 BR BR8700728A patent/BR8700728A/en not_active IP Right Cessation
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1114564C (en) * | 1999-04-01 | 2003-07-16 | 张其春 | Technological process of preparing pure cerium hydroxide |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1009641B (en) | 1990-09-19 |
| MY102131A (en) | 1992-04-30 |
| BR8700728A (en) | 1987-12-15 |
| JPS62191422A (en) | 1987-08-21 |
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