CN102092763A - Method for purifying strontium sulfate and co-producing calcium sulfate and industrial salt by using strontium sulfate waste residues - Google Patents
Method for purifying strontium sulfate and co-producing calcium sulfate and industrial salt by using strontium sulfate waste residues Download PDFInfo
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- CN102092763A CN102092763A CN2010102754081A CN201010275408A CN102092763A CN 102092763 A CN102092763 A CN 102092763A CN 2010102754081 A CN2010102754081 A CN 2010102754081A CN 201010275408 A CN201010275408 A CN 201010275408A CN 102092763 A CN102092763 A CN 102092763A
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- strontium sulphate
- sulfate
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Abstract
The invention belong to the technical field of treatment and utilization of chemical waste gases, waste water and waste residues, and particularly relates to a method for purifying strontium sulfate and co-producing calcium sulfate and industrial salt by using strontium sulfate waste residues. The main technical scheme is that: the strontium sulfate is extracted from the strontium sulfate waste residues by utilizing calcium chloride, thereby forming relatively purer solution of strontium sulfate and the calcium sulfate, and exchange reaction is performed by using sodium sulphate to simultaneously obtain pure strontium sulfate and the byproduct industrial salt. The method ensures low production cost, high profits, great market needs and simple process and production equipment, is a relatively more practical treatment and utilization method, can create considerable economic values, eliminates the chemical waste residues, treats environmental pollutions and avoids the hidden dangers of secondary pollutions.
Description
Technical field
The invention belongs to the technical field of three chemical wastes and utilization, the particularly a kind of Strontium Sulphate waste residue purification Strontium Sulphate co-producing sulfuric acid calcium that produces in the inorganic chemical industry thiocarbamide manufacturing processed and method of Industrial Salt utilized.
Technical background
The production method that thiocarbamide is produced is a lot, wherein traditional method is to adopt the sulfuric acid acidation barium sulphide to produce hydrogen sulfide, carries out condensation reaction with calcyanide again, after crystallization, dehydration, drying, pulverizing, packing make thiocarbamide, but one ton of thiocarbamide of every production will produce 9.5 tons barium sulfide waste residue, like this a large amount of waste residue if handle badly, not only can take a large amount of soils, and can pollute the environment band, especially waste residue contains the part rare metal, and as not being used, then waste is very big; The relevant report of the method for present Strontium Sulphate waste residue purification Strontium Sulphate co-producing sulfuric acid calcium also useless and Industrial Salt.
Summary of the invention
The invention provides a kind of not only with low cost, be easy to realize that and technology and production unit are simply used the method for Strontium Sulphate waste residue purification Strontium Sulphate co-producing sulfuric acid calcium and Industrial Salt; This method can produce the Industrial products of high economic worth.
To achieve the above object, technical scheme of the present invention is:
A kind of method with Strontium Sulphate waste residue purification Strontium Sulphate co-producing sulfuric acid calcium and Industrial Salt, preparation process is as follows:
Steps A, will convert good Strontium Sulphate waste residue and calcium chloride, under stirring slowly, carry out chemical reaction with the putting in first corrosion-resistant reactor of pure mass ratio 1: 0.40～0.80 priority; Reaction generates pure strontium chloride and calcium sulfate mixing solutions; Described Strontium Sulphate waste residue and calcium chloride reaction are by the pure Strontium Sulphate in the waste residue;
Step B, with the reaction mixture that obtains of reaction in the steps A, filter with first strainer, obtain white filter cake calcium sulfate and clarification and purified strontium chloride solution;
Step C, step B gained strontium chloride solution and sodium sulfate are carried out chemical reaction with pure mass ratio 1: 0.69～1.09 in second corrosion-resistant reactor; Generate the liquid of Strontium Sulphate and sodium-chlor.
Step D, with the reaction mixture that obtains of reaction among the step C, filter with second strainer;
Gained filtrate is sent in the distiller and is distilled among step e, the step D, cools off to separate out with cooling tower again to obtain the Industrial Salt product when reaching capacity;
Among step F, the step D filter cake of gained successively with first washer, first moisture eliminator and first pulverizer wash, dry, crushing packing obtains the Strontium Sulphate product;
Among step G, the step B filter cake of gained successively with second washer, second moisture eliminator and second pulverizer wash, dry, crushing packing obtains the calcium sulfate product.
Wherein, used calcium chloride is the refining waste liquid of chlor-alkali in the described steps A; When reacting, by pure calcium chloride with the Strontium Sulphate waste residue;
In the described step e, described filtrate distillation is underpressure distillation.
The present invention utilizes calcium chloride that the Strontium Sulphate in the Strontium Sulphate waste residue is dissolved out, thereby forms solution and calcium sulfate such as purer strontium chloride, and then obtains purified Strontium Sulphate with sodium sulfate exchange reduction, goes back the by-product Industrial Salt simultaneously; Not only production cost is cheap, profit is high in the present invention, the huge market demand, and technology and production unit are simple; Be a kind of relatively actual processing and utilize method, this method not only can create considerable economic value, but also has eliminated chemical sludge, administered environmental pollution; Avoided the hidden danger of secondary pollution.
Reaction principle of the present invention is:
SrSO
4+CaCl
2＝＝＝＝＝SrCl
2+CaSO
4
SrCl
2+Na
2SO
4＝＝＝＝＝SrSO
4+2NaCl
Description of drawings
Fig. 1 is the method with Strontium Sulphate waste residue purification Strontium Sulphate co-producing sulfuric acid calcium and Industrial Salt;
Wherein:
1-first corrosion-resistant reactor, 2-first strainer, 3-second corrosion-resistant reactor, 4-second strainer, 5-distiller, 6-cooling tower, 7-Industrial Salt product, 8-first washer, 9-first moisture eliminator, 10-first pulverizer, 11-Strontium Sulphate product, 12-second washer, 13-second moisture eliminator, 14-second pulverizer, 15-calcium sulfate product.
Concrete embodiment
Embodiment 1
A kind of method with Strontium Sulphate waste residue purification Strontium Sulphate co-producing sulfuric acid calcium and Industrial Salt, preparation process is as follows:
Steps A, will convert good Strontium Sulphate waste residue (by pure Strontium Sulphate 400kg) and the refining waste liquid (by pure calcium chloride) of chlor-alkali with pure mass ratio 1: 0.4 successively successively put into 1 li of first corrosion-resistant reactor, under stirring slowly, carry out chemical reaction; Reaction generates pure strontium chloride and calcium sulfate mixing solutions.
Step B, with the reaction mixture that obtains of reaction in the steps A, filter with first strainer 2, obtain white filter cake calcium sulfate and clarification and purified strontium chloride solution;
Step C, step B gained strontium chloride solution and sodium sulfate are carried out chemical reaction with pure mass ratio 1: 0.69 for 3 li at second corrosion-resistant reactor; Generate the liquid of Strontium Sulphate and sodium-chlor.
Step D, with the reaction mixture that obtains of reaction among the step C, filter with second strainer 4;
Gained filtrate is sent into and is carried out underpressure distillation in the distiller 5 among step e, the step D, cools off to separate out with cooling tower 6 again to obtain 135.21kg Industrial Salt product 7 when reaching capacity;
The filter cake of gained is successively with first washer 8, first moisture eliminator 9 with first pulverizer 10 washs, dry, crushing packing obtains 212.24kg Strontium Sulphate product 11 among step F, the step D;
The filter cake of gained is successively with second washer 12, second moisture eliminator 13 with second pulverizer 14 washs, dry, crushing packing obtains 196.01kg calcium sulfate product 15 among step G, the step B.
Embodiment 2
A kind of method with Strontium Sulphate waste residue purification Strontium Sulphate co-producing sulfuric acid calcium and Industrial Salt, preparation process is as follows:
Steps A, will convert good Strontium Sulphate waste residue (by pure Strontium Sulphate 400kg) and the refining waste liquid (by pure calcium chloride) of chlor-alkali with pure mass ratio 1: 0.6 successively successively put into 1 li of first corrosion-resistant reactor, under stirring slowly, carry out chemical reaction; Reaction generates pure strontium chloride and calcium sulfate mixing solutions.
Step B, with the reaction mixture that obtains of reaction in the steps A, filter with first strainer 2, obtain white filter cake calcium sulfate and clarification and purified strontium chloride solution;
Step C, step B gained strontium chloride solution and sodium sulfate are carried out chemical reaction with pure mass ratio 1: 0.89 for 3 li at second corrosion-resistant reactor; Generate the liquid of Strontium Sulphate and sodium-chlor.
Step D, with the reaction mixture that obtains of reaction among the step C, filter with second strainer 4;
Gained filtrate is sent into and is carried out underpressure distillation in the distiller 5 among step e, the step D, cools off to separate out with cooling tower 6 again to obtain 261.66kg Industrial Salt product 7 when reaching capacity;
The filter cake of gained is successively with first washer 8, first moisture eliminator 9 with first pulverizer 10 washs, dry, crushing packing obtains 410.64kg Strontium Sulphate product 11 among step F, the step D;
The filter cake of gained is successively with second washer 12, second moisture eliminator 13 with second pulverizer 14 washs, dry, crushing packing obtains 294.02kg calcium sulfate product 15 among step G, the step B.
Embodiment 3
A kind of method with Strontium Sulphate waste residue purification Strontium Sulphate co-producing sulfuric acid calcium and Industrial Salt, preparation process is as follows:
Steps A, will convert good Strontium Sulphate waste residue (by pure Strontium Sulphate 400kg) and the refining waste liquid (by pure calcium chloride) of chlor-alkali with pure mass ratio 1: 0.80 successively successively put into 1 li of first corrosion-resistant reactor, under stirring slowly, carry out chemical reaction; Reaction generates pure strontium chloride and calcium sulfate mixing solutions.
Step B, with the reaction mixture that obtains of reaction in the steps A, filter with first strainer 2, obtain white filter cake calcium sulfate and clarification and purified strontium chloride solution;
Step C, step B gained strontium chloride solution and sodium sulfate are carried out chemical reaction with pure mass ratio 1: 1.09 for 3 li at second corrosion-resistant reactor; Generate the liquid of Strontium Sulphate and sodium-chlor.
Step D, with the reaction mixture that obtains of reaction among the step C, filter with second strainer 4;
Gained filtrate is sent into and is carried out underpressure distillation in the distiller 5 among step e, the step D, cools off to separate out with cooling tower 6 again to obtain 287.93kg Industrial Salt product 7 when reaching capacity;
The filter cake of gained is successively with first washer 8, first moisture eliminator 9 with first pulverizer 10 washs, dry, crushing packing obtains 451.88kg Strontium Sulphate product 11 among step F, the step D;
The filter cake of gained is successively with second washer 12, second moisture eliminator 13 with second pulverizer 14 washs, dry, crushing packing obtains 392.02kg calcium sulfate product 15 among step G, the step B.
The foregoing description is preferred embodiment of the present invention, is not to be used for limiting the scope of the present invention, so all equivalences of being done with described feature of claim of the present invention and principle change or modify, all should be included within the claim scope of the present invention.
Claims (3)
1. method with Strontium Sulphate waste residue purification Strontium Sulphate co-producing sulfuric acid calcium and Industrial Salt is characterized in that preparation process is as follows:
Steps A, will convert good Strontium Sulphate waste residue and put in first corrosion-resistant reactor with pure mass ratio 1: 0.40～0.80 priority, under stirring slowly, carry out chemical reaction with calcium chloride; Described Strontium Sulphate waste residue and calcium chloride reaction are by the pure Strontium Sulphate in the waste residue;
Step B, with the reaction mixture that obtains of reaction in the steps A, filter with first strainer, obtain white filter cake calcium sulfate and clarification and purified strontium chloride solution;
Step C, step B gained strontium chloride solution and sodium sulfate are carried out chemical reaction with pure mass ratio 1: 0.69～1.09 in second corrosion-resistant reactor;
Step D, with the reaction mixture that obtains of reaction among the step C, filter with second strainer;
Gained filtrate is sent in the distiller and is distilled among step e, the step D, cools off to separate out with cooling tower again to obtain the Industrial Salt product when reaching capacity;
Among step F, the step D filter cake of gained successively with first washer, first moisture eliminator and first pulverizer wash, dry, crushing packing obtains the Strontium Sulphate product;
Among step G, the step B filter cake of gained successively with second washer, second moisture eliminator and second pulverizer wash, dry, crushing packing obtains the calcium sulfate product.
2. the method with Strontium Sulphate waste residue purification Strontium Sulphate co-producing sulfuric acid calcium and Industrial Salt according to claim 1 is characterized in that, used calcium chloride is the refining waste liquid of chlor-alkali in the described steps A; When reacting, by pure calcium chloride with the Strontium Sulphate waste residue;
3. the method with Strontium Sulphate waste residue purification Strontium Sulphate co-producing sulfuric acid calcium and Industrial Salt according to claim 1 is characterized in that, in the described step e, described filtrate distillation is underpressure distillation.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106241850A (en) * | 2016-07-12 | 2016-12-21 | 重庆工商大学 | The preparation method and applications of insoluble sulfur hydrochlorate photocatalyst |
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2010
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106241850A (en) * | 2016-07-12 | 2016-12-21 | 重庆工商大学 | The preparation method and applications of insoluble sulfur hydrochlorate photocatalyst |
| CN106241850B (en) * | 2016-07-12 | 2018-01-02 | 重庆工商大学 | The preparation method and applications of insoluble sulfur hydrochlorate photochemical catalyst |
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Application publication date: 20110615 |