CN104058444A - Method for preparing strontium chloride by using strontium slag - Google Patents
Method for preparing strontium chloride by using strontium slag Download PDFInfo
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- CN104058444A CN104058444A CN201410269861.XA CN201410269861A CN104058444A CN 104058444 A CN104058444 A CN 104058444A CN 201410269861 A CN201410269861 A CN 201410269861A CN 104058444 A CN104058444 A CN 104058444A
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- strontium
- slag
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- sulfuric acid
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Abstract
The invention discloses a method for preparing strontium chloride by using strontium slag. The method specifically comprises the following steps: (1), firstly grinding the strontium slag into powder, then sieving the ground strontium slag through a 100-mesh sieve; (2), adding hydrochloric acid in the sieved strontium slag powder, wherein the weight ratio of hydrochloric acid to the strontium slag powder is 1.25:1; then stirring, reacting for 2-4h, filtering to obtain supernate after the reaction is ended; (3), adding sulfuric acid in the supernate prepared in the step (2), stirring, and reacting for 1-2h; (4), after the reaction is ended, adding strontium hydroxide in the solution, regulating pH of the solution to 6.5-7.5, standing, and filtering to obtain filtrate after completely settling; and (5), heating, evaporating and crystallizing the filtrate obtained in the step (4) to obtain the strontium chloride. The method provided by the invention has the advantages of simplicity, low requirement on equipment, safety, environment friendliness, high yield, and the like.
Description
Technical field
The present invention relates to chemical technology field, relate in particular to a kind of method of utilizing strontium slag to prepare strontium chloride.
Background technology
Strontium slag is the waste residue producing in the process of production Preparation of Metallic Strontium, and main content is strontium, thus general designation strontium slag, the mode that strontium slag takes collective's sealing to stack.
Strontium slag exists difficult treatment at present, stacks for a long time the problems such as contaminate environment, so find a kind of mode comprehensive utilization of resources and environment protection of processing strontium slag, has very large meaning.
Summary of the invention
The invention provides a kind of method of utilizing strontium slag to prepare strontium chloride.
The present invention adopts following technical scheme:
The concrete steps of the method that strontium slag prepares strontium chloride of utilizing of the present invention are as follows:
(1) first strontium slag is carried out to grinding, then the strontium slag after grinding is crossed to 100 mesh sieves;
(2) in the strontium ground-slag end after sieving, add hydrochloric acid, the add-on of hydrochloric acid is 1.25 times of strontium slag powder weight, then stirs, and reaction 2-4h, filters to obtain clear liquid after reaction finishes;
(3) in the clear liquid making toward step (2), add sulfuric acid, detect the barium content in strontium slag, according to doubly adding sulfuric acid except barium with the 1.2-1.5 of sulfuric acid theoretical value, then stir, reaction 1-2h;
(4) after reaction finishes, in solution, add strontium hydroxide, regulator solution pH to 6.5-7.5, standing, after precipitating completely, then filter, obtain filtrate;
(5) step (4) is carried out to heating evaporation crystallization, obtain strontium chloride.
In step (1), in described strontium slag, comprise SrOAl
2o
3, Sr (OH)
2, Al, Sr and the SrCO not decomposing
3.
In step (4), preferred regulator solution pH to 7.0.
In step (5), heating evaporation, the temperature of crystallization is≤35 ℃.
The main component of Preparation of Metallic Strontium slag is: SrOAl
2o
3, Sr (OH)
2, Al, the SrCO that Sr does not decompose
3, its proterties is solid, is insoluble in water, for convenience of the useful strontium the best way extracting wherein, is that it is transformed in solution with dissolving with hydrochloric acid, after it dissolves, insolubles is filtered, filtrate is produced six water strontium chlorides by producing the technique of six water strontium chlorides.Its principal reaction is:
SrO+2HCl→SrCl
2·6H
2O (1)
Al
2O
3+6HCl→2AlCl
3(2)
AlCl
3+3OH
-→Al(OH)
3+3Cl
-(3)
Positively effect of the present invention is as follows:
It is simple, low for equipment requirements that the method for utilizing strontium slag to prepare strontium chloride of the present invention has method, safety and environmental protection, and yield advantages of higher.Method of the present invention " three wastes " quantity discharged in producing process is less, and processing parameter is convenient to control, and without waste product, produces, easy to operate, to operative employee's integral body, requires relatively low.
Accompanying drawing explanation
Fig. 1 is the schema that utilizes strontium slag to prepare the method for strontium chloride of the present invention.
Embodiment
The following examples are to describe in further detail of the present invention.
Embodiment 1
(1) first strontium slag is carried out to grinding, then the strontium slag after grinding is crossed to 100 mesh sieves;
(2) in the strontium ground-slag end after sieving, add hydrochloric acid, the add-on of hydrochloric acid is 1.25 times of strontium slag powder weight, then stirs, and reaction 2h, filters to obtain clear liquid after reaction finishes;
(3) in the clear liquid making toward step (2), add sulfuric acid, detect the barium content in strontium slag, according to adding sulfuric acid except barium with 1.2 times of sulfuric acid theoretical value, then stir, react 1h;
(4) after reaction finishes, in solution, add strontium hydroxide, regulator solution pH to 6.5, standing, after precipitating completely, then filter, obtain filtrate;
(5) step (4) is carried out to heating evaporation crystallization, obtain strontium chloride.
Embodiment 2
(1) first strontium slag is carried out to grinding, then the strontium slag after grinding is crossed to 100 mesh sieves;
(2) in the strontium ground-slag end after sieving, add hydrochloric acid, the add-on of hydrochloric acid is 1.25 times of strontium slag powder weight, then stirs, and reaction 4h, filters to obtain clear liquid after reaction finishes;
(3) in the clear liquid making toward step (2), add sulfuric acid, detect the barium content in strontium slag, according to adding sulfuric acid except barium with 1.5 times of sulfuric acid theoretical value, then stir, react 2h;
(4) after reaction finishes, in solution, add strontium hydroxide, regulator solution pH to 7.5, standing, after precipitating completely, then filter, obtain filtrate;
(5) step (4) is carried out to heating evaporation crystallization, obtain strontium chloride.
Embodiment 3
(1) first strontium slag is carried out to grinding, then the strontium slag after grinding is crossed to 100 mesh sieves;
(2) in the strontium ground-slag end after sieving, add hydrochloric acid, the add-on of hydrochloric acid is 1.25 times of strontium slag powder weight, then stirs, and reaction 3h, filters to obtain clear liquid after reaction finishes;
(3) in the clear liquid making toward step (2), add sulfuric acid, detect the barium content in strontium slag, according to adding sulfuric acid except barium with 1.3 times of sulfuric acid theoretical value, then stir, react 1.5h;
(4) after reaction finishes, in solution, add strontium hydroxide, regulator solution pH to 7.0, standing, after precipitating completely, then filter, obtain filtrate;
(5) step (4) is carried out to heating evaporation crystallization, obtain strontium chloride.
Through company's pre-stage test result data, add up: the recyclable six water strontium chloride 800Kg of 1T strontium slag, coproduct hydrogen aluminum oxide, produces the about 10Kg of secondary residue (impurity of removal) simultaneously, and strontium slag utilization ratio reaches more than 99%.
Although illustrated and described embodiments of the invention, for the ordinary skill in the art, be appreciated that without departing from the principles and spirit of the present invention and can carry out multiple variation, modification, replacement and modification to these embodiment, scope of the present invention is limited by claims and equivalent thereof.
Claims (3)
1. utilize strontium slag to prepare a method for strontium chloride, it is characterized in that: the concrete steps of described method are as follows:
(1) first strontium slag is carried out to grinding, then the strontium slag after grinding is crossed to 100 mesh sieves;
(2) in the strontium ground-slag end after sieving, add hydrochloric acid, the add-on of hydrochloric acid and strontium ground-slag end weight ratio are 1.25:1, then stir, and reaction 2-4h, filters to obtain clear liquid after reaction finishes;
(3) in the clear liquid making toward step (2), add sulfuric acid, detect the barium content in strontium slag, according to doubly adding sulfuric acid except barium with the 1.2-1.5 of sulfuric acid theoretical value, then stir, reaction 1-2h;
(4) after reaction finishes, in solution, add strontium hydroxide, regulator solution pH to 6.5-7.5, standing, after precipitating completely, then filter, obtain filtrate;
(5) step (4) is carried out to heating evaporation crystallization, obtain strontium chloride.
2. the method for claim 1, is characterized in that: in step (1), in described strontium slag, comprise SrOAl
2o
3, Sr (OH)
2, Al, Sr and the SrCO not decomposing
3.
3. the method for claim 1, is characterized in that: in step (4), and regulator solution pH to 7.0.4, the method for claim 1, is characterized in that: in step (5), and heating evaporation, the temperature of crystallization is≤35 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410269861.XA CN104058444A (en) | 2014-06-17 | 2014-06-17 | Method for preparing strontium chloride by using strontium slag |
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|---|---|---|---|
| CN201410269861.XA CN104058444A (en) | 2014-06-17 | 2014-06-17 | Method for preparing strontium chloride by using strontium slag |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105293555A (en) * | 2015-11-10 | 2016-02-03 | 青海民族大学 | Method for preparing high-purity strontium chloride by utilizing strontium slag |
| CN109011670A (en) * | 2018-09-13 | 2018-12-18 | 中国核动力研究设计院 | It is a kind of89SrCl2The enrichment facility and its method for concentration of solution |
| CN111762817A (en) * | 2020-04-24 | 2020-10-13 | 重庆大学 | Method for preparing strontium barium ferrite from strontium slag |
| CN114229880A (en) * | 2021-12-24 | 2022-03-25 | 湖州国阳化学科技有限公司 | Method for preparing low-barium industrial strontium chloride through primary crystallization and strontium chloride obtained through method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102275968A (en) * | 2011-06-03 | 2011-12-14 | 重庆邮电大学 | Method for preparing strontium chloride by using metal strontium slag |
| CN102417199A (en) * | 2011-08-31 | 2012-04-18 | 天津市化学试剂研究所 | Preparation method of spectroscopically pure strontium chloride |
-
2014
- 2014-06-17 CN CN201410269861.XA patent/CN104058444A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102275968A (en) * | 2011-06-03 | 2011-12-14 | 重庆邮电大学 | Method for preparing strontium chloride by using metal strontium slag |
| CN102417199A (en) * | 2011-08-31 | 2012-04-18 | 天津市化学试剂研究所 | Preparation method of spectroscopically pure strontium chloride |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105293555A (en) * | 2015-11-10 | 2016-02-03 | 青海民族大学 | Method for preparing high-purity strontium chloride by utilizing strontium slag |
| WO2017080244A1 (en) * | 2015-11-10 | 2017-05-18 | 严利容 | Method for preparing high-purity strontium chloride by using strontium slag |
| CN109011670A (en) * | 2018-09-13 | 2018-12-18 | 中国核动力研究设计院 | It is a kind of89SrCl2The enrichment facility and its method for concentration of solution |
| CN111762817A (en) * | 2020-04-24 | 2020-10-13 | 重庆大学 | Method for preparing strontium barium ferrite from strontium slag |
| CN114229880A (en) * | 2021-12-24 | 2022-03-25 | 湖州国阳化学科技有限公司 | Method for preparing low-barium industrial strontium chloride through primary crystallization and strontium chloride obtained through method |
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Application publication date: 20140924 |