CN102328937A - Method for preparing sodium chloride and powdery barium salt by using salting-out mother liquor generated in zinc powder method - Google Patents
Method for preparing sodium chloride and powdery barium salt by using salting-out mother liquor generated in zinc powder method Download PDFInfo
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- CN102328937A CN102328937A CN201110142066A CN201110142066A CN102328937A CN 102328937 A CN102328937 A CN 102328937A CN 201110142066 A CN201110142066 A CN 201110142066A CN 201110142066 A CN201110142066 A CN 201110142066A CN 102328937 A CN102328937 A CN 102328937A
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Abstract
The invention belongs to the technical field of treatment and utilization of the three wastes in the chemical industry, and in particular relates to a method for preparing sodium chloride and powdery barium salt by using salting-out mother liquor generated in a zinc powder method. According to the invention, barium chloride is mainly adopted to treat the salting-out mother liquor which is generated in the preparation of sodium hydrosulfite by using the zinc powder method, thus not only can sodium chloride and powdery barium salt products which have economic values and are pure be produced, but also almost no pollution is caused by the emission of the three wastes, and even a semi-finished product cleaning solution can also be recovered and utilized to dissolve raw materials. The method has the advantages of simple production process, simple equipment and low cost; and by using the method, the environmental pollution caused by the salting-out mother liquor, which is generated in the preparation of sodium hydrosulfite by using the zinc powder method, can be effectively controlled, and considerable economic benefits are created at the same time.
Description
Technical field
The invention belongs to the technical field of inorganic chemical industry industry comprehensive administration of three wastes and utilization, particularly a kind of salting-out mother liquor that is equipped with in the vat powder to be produced with the zinc powder legal system prepares the method for sodium-chlor and powder barium salt.
Technical background
The zinc powder legal system is equipped with vat powder (Na
2S
2O
42H
2O, V-Brite B) be in zinc suspension liquid, to feed sulfurous gas earlier, again with sodium hydroxide carry out metathesis, filter, saltout, dewater, the dry and product that makes.Its important use is to do printing and dyeing reductive agent, association with pulp bleaching agent etc.This method produces a large amount of salting-out mother liquors in salting-out process, one ton of vat powder of average every production just can produce 7～8 cubic metres mother liquor.An enterprise that produces 5000 tons of vat powders per year discharges mother liquor and can reach 3500～4000 cubic metres, not only severe contamination environment, and caused a large amount of losses of resource.Therefore, how fully utilizing salting-out mother liquor, is the research topic of vat powder enterprise-essential.
The staple of salting-out mother liquor is sodium-chlor, S-WAT, sodium hydroxide, V-Brite B and sodium sulfate etc.; Because the technologic difference of each enterprise production, the composition of salting-out mother liquor also has certain difference, and its main chemical compositions is roughly following: sodium chloride content is 240～270 grams per liters; S-WAT content is 40～50 grams per liters; Sodium hydrate content is 35～45 grams per liters, and the SODIUM HYDROSULPHITE sodium content is 13～21 grams per liters, and sodium sulphate content is 5～10 grams per liters.
The method of comprehensive utilization of salting-out mother liquor is a lot of in China's zinc powder method at present, has hydrochloric acid synthetic method, direct absorption method, three to steam two and freezes the method for washing, sulfurous gas neutralisation and improvement sulfurous gas neutralisation etc.Wherein the hydrochloric acid neutralisation is the method that technology is simple, investment is minimum with direct absorption method; But the hydrochloric acid neutralisation need consume a large amount of hydrochloric acid, and the cost that reclaims salt is increased substantially, and the quality that not only reclaims salt is on the low side; And slant acidity; Production to vat powder has certain influence, at the reaction process sulfur dioxide gas of can overflowing, also can cause secondary pollution.
Summary of the invention
The invention provides a kind of not only with low cost, reclaim the salt quality high, be easy to realize that and production technique and production unit simply prepare the method for sodium-chlor and powder barium salt with the salting-out mother liquor in the zinc powder method; This method can not only be produced more purified sodium-chlor, but also coproduction powder barium salt does not almost have the three wastes to discharge pollution simultaneously, and just half-finished washings also can recycle dissolving raw material at last.
In order to reach above-mentioned purpose, technical scheme of the present invention is:
Prepare the method for sodium-chlor and powder barium salt with the salting-out mother liquor in the zinc powder method, comprise being prepared as follows step:
Steps A, will use salting-out mother liquor and barium chloride solution in the zinc powder method to put in the corrosion-resistant reactor, and not stop to stir according to the mass ratio 1: 0.95～1.65 of pure substance; Reaction generates the mixing solutions of sodium-chlor, barium sulfite, barium hyposulflte and permanent white; Pure S-WAT, V-Brite B and the sodium sulfate that is contained in the salting-out mother liquor that said pure substance refers to react with bariumchloride (being the actual amount of putting into the bariumchloride in the corrosion-resistant reactor, is 0.95～1.65 times of calculating according to pure S-WAT, V-Brite B and sodium sulfate sum).The stirring reaction time is indefinite, and it is fixed to come according to the amount of actual treatment salting-out mother liquor.
Step B, the mixing solutions of gained in the steps A is filtered with strainer;
Step C, with the filter cake of gained among the step B, wash with first washing and spin-drying machine, the first drying and crushing machine earlier and dry and drying and crushing, carry out the classification selection by winnowing with classification winnowing machine again, distinguish powder barium sulfite, barium hyposulflte and permanent white after the selection by winnowing;
Step D, gained powder barium sulfite among the step C handy first wrapper of checking the weight is checked the weight and is packaged to be powder barium sulfite product; Gained powder barium hyposulflte handy second wrapper of checking the weight is checked the weight and is packaged to be powder and connects the barium sulfite product; Gained powder permanent white the 3rd wrapper of checking the weight is checked the weight and is packaged to be the powder barium sulfate product
Step e, with the sodium-chlor of gained among step B filtrating successively with distiller, cooling tower, second washing and spin-drying machine, the second drying and crushing machine and the 4th check the weight that wrapper is distilled, crystallisation by cooling, washing and spin-drying machine, drying and crushing and checking the weight obtain the sodium chloride crystal product after packing.
The present invention adopts bariumchloride to handle the salting-out mother liquor that the zinc powder legal system is equipped with in the vat powder to be produced, can not only produce economic worth, more purified sodium-chlor, powder barium sulfite, barium hyposulfate and barium sulfate product; And almost do not have the three wastes to discharge pollution, just be that the work in-process washings also can recycle dissolving raw material.This method not only production technique and equipment thereof is simple, with low cost, and effectively administered the pollution to environment of salting-out mother liquor that the zinc powder legal system is equipped with in the vat powder to be produced, created considerable economic simultaneously.
Its chemical equation is: Na
2SO
3+ BaCl
2====2NaCl+BaSO
3
Na
2S
2O
4+BaCl
2＝＝＝＝2NaCl+BaS
2O
4
Na
2SO
4+BaCl
2＝＝＝＝2NaCl+BaSO
4
Description of drawings
Fig. 1 is the process flow diagram for preparing the method for sodium-chlor and powder barium salt with the salting-out mother liquor in the zinc powder method,
Wherein:
The 1-corrosion-resistant reactor, 2-strainer, 3-first washing and spin-drying machine, the 4-first drying and crushing machine, 5-classification winnowing machine; 6-first wrapper of checking the weight, 7-powder barium sulfite product, 8-second wrapper of checking the weight, 9-powder barium hyposulflte product; 10-the 3rd wrapper of checking the weight, 11-powder barium sulfate product, 12-distiller, 13-cooling tower; 14-second washing and spin-drying machine, the 15-second drying and crushing machine, 16-the 4th wrapper of checking the weight, 17-sodium chloride crystal product.
Concrete embodiment
Embodiment 1
Prepare the method for sodium-chlor and powder barium salt with the salting-out mother liquor in the zinc powder method, it is characterized in that: comprise being prepared as follows step:
Steps A, will use salting-out mother liquor in the zinc powder method to put into 1 li of corrosion-resistant reactor with barium chloride solution at 1: 0.95 according to the mass ratio of pure substance for 1000 liters (wherein to contain S-WAT 40Kg, V-Brite B 20Kg, sodium sulfate 10Kg; Mass ratio according to mass ratio 1: 0.95, sodium sulfate and the bariumchloride of mass ratio 1: 0.95, V-Brite B and the bariumchloride of S-WAT and bariumchloride calculates at 1: 0.95 respectively; Then the bariumchloride of required input is 66.5Kg), do not stop to stir; Reaction generates the mixing solutions of sodium-chlor, barium sulfite barium hyposulflte and permanent white;
Step B, the mixing solutions of gained in the steps A is filtered with strainer 2;
Step C, with the filter cake of gained among the step B; Earlier wash drying and drying and crushing with first washing and spin-drying machine 3, the first drying and crushing machine 4; Carry out the classification selection by winnowing with classification winnowing machine 5 again, obtain powder barium sulfite, barium hyposulflte and permanent white after the selection by winnowing respectively;
Step D, gained powder barium sulfite among the step C handy first wrapper 6 of checking the weight is checked the weight and is packaged to be 39.67Kg powder barium sulfite product 7; Gained powder barium hyposulflte handy second wrapper 8 of checking the weight is checked the weight and is packaged to be 24.22Kg powder barium hyposulflte product 9; Gained permanent white the 3rd wrapper 10 of checking the weight is checked the weight and is packaged to be 10.65Kg powder barium sulfate product 11
Step e, with the sodium-chlor of gained among step B filtrating successively with distiller 12, cooling tower 13, second washing and spin-drying machine 14, the second drying and crushing machine 15 and the 4th check the weight that wrapper 16 is distilled, crystallisation by cooling, washing and spin-drying machine, drying and crushing and checking the weight obtain 37.33Kg sodium chloride crystal product 17 after packing.
Embodiment 2
Prepare the method for sodium-chlor and powder barium salt with the salting-out mother liquor in the zinc powder method, it is characterized in that: comprise being prepared as follows step:
Steps A, will use salting-out mother liquor in the zinc powder method to put into 1 li of corrosion-resistant reactor with barium chloride solution at 1: 1.65 according to the mass ratio of pure substance for 1000 liters (wherein to contain sodium-chlor 250Kg, S-WAT 40Kg, V-Brite B 20Kg, sodium sulfate 10Kg; Mass ratio according to mass ratio 1: 1.65, sodium sulfate and the bariumchloride of mass ratio 1: 1.65, V-Brite B and the bariumchloride of S-WAT and bariumchloride calculates at 1: 1.65 respectively; Then the bariumchloride of required input is 115.5Kg), do not stop to stir; Reaction generates the mixing solutions of sodium-chlor, barium sulfite barium hyposulflte and permanent white;
Step B, the mixing solutions of gained in the steps A is filtered with strainer 2;
Step C, with the filter cake of gained among the step B; Earlier wash drying and drying and crushing with first washing and spin-drying machine 3, the first drying and crushing machine 4; Carry out the classification selection by winnowing with classification winnowing machine 5 again, obtain powder barium sulfite, barium hyposulflte and permanent white after the selection by winnowing respectively;
Step D, gained powder barium sulfite among the step C handy first wrapper 6 of checking the weight is checked the weight and is packaged to be 68.98Kg powder barium sulfite product 7; Gained powder barium hyposulflte handy second wrapper 8 of checking the weight is checked the weight and is packaged to be 30.49g powder barium hyposulflte product 9; Gained permanent white the 3rd wrapper 10 of checking the weight is checked the weight and is packaged to be 16.43Kg powder barium sulfate product 11
Step e, with the sodium-chlor of gained among step B filtrating successively with distiller 12, cooling tower 13, second washing and spin-drying machine 14, the second drying and crushing machine 15 and the 4th check the weight that wrapper 16 is distilled, crystallisation by cooling, washing and spin-drying machine, drying and crushing and checking the weight obtain 58.75Kg sodium chloride crystal product 17 after packing.
The foregoing description is preferred embodiment of the present invention, is not to be used for limiting practical range of the present invention, so all equivalences of being done with described characteristic of claim of the present invention and principle change or modify, all should be included within the claim scope of the present invention.
Claims (2)
1. prepare the method for sodium-chlor and powder barium salt with the salting-out mother liquor in the zinc powder method, it is characterized in that: comprise being prepared as follows step:
Steps A, salting-out mother liquor that is produced in the zinc powder method and barium chloride solution are put in the corrosion-resistant reactor according to the mass ratio 1: 0.95～1.65 of pure substance, do not stopped to stir; Reaction generates the mixing solutions of sodium-chlor, barium sulfite, barium hyposulflte and permanent white;
Step B, the mixing solutions of gained in the steps A is filtered with strainer;
Step C, with the filter cake of gained among the step B; Wash with first washing and spin-drying machine, the first drying and crushing machine earlier and dry and drying and crushing; Carry out the classification selection by winnowing with classification winnowing machine again, obtain powder barium sulfite, barium hyposulflte and permanent white after the selection by winnowing respectively;
Step D, gained powder barium sulfite among the step C handy first wrapper of checking the weight is checked the weight and is packaged to be powder barium sulfite product; Gained powder barium hyposulflte handy second wrapper of checking the weight is checked the weight and is packaged to be powder and connects the barium sulfite product, and gained powder permanent white the 3rd wrapper of checking the weight is checked the weight and is packaged to be the powder barium sulfate product;
Step e, with the sodium-chlor of gained among step B filtrating successively with distiller, cooling tower, second washing and spin-drying machine, the second drying and crushing machine and the 4th check the weight that wrapper is distilled, crystallisation by cooling, washing and spin-drying machine, drying and crushing and checking the weight obtain the sodium chloride crystal product after packing.
2. prepare the method for sodium-chlor and powder barium salt according to the salting-out mother liquor described in the claim 1, it is characterized in that: contained pure S-WAT, V-Brite B and sodium sulfate in the salting-out mother liquor that pure substance described in the steps A refers to react with bariumchloride with in the zinc powder method.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110142066A CN102328937A (en) | 2011-05-30 | 2011-05-30 | Method for preparing sodium chloride and powdery barium salt by using salting-out mother liquor generated in zinc powder method |
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|---|---|---|---|
| CN201110142066A CN102328937A (en) | 2011-05-30 | 2011-05-30 | Method for preparing sodium chloride and powdery barium salt by using salting-out mother liquor generated in zinc powder method |
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|---|---|---|---|
| CN201110142066A Pending CN102328937A (en) | 2011-05-30 | 2011-05-30 | Method for preparing sodium chloride and powdery barium salt by using salting-out mother liquor generated in zinc powder method |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101643233A (en) * | 2009-06-08 | 2010-02-10 | 王嘉兴 | Method for preparing co-production sodium chloride of precipitated barium sulfate |
| CN101792168A (en) * | 2009-06-08 | 2010-08-04 | 王嘉兴 | Method for preparing barium sulfate and co-producing sodium chloride |
-
2011
- 2011-05-30 CN CN201110142066A patent/CN102328937A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101643233A (en) * | 2009-06-08 | 2010-02-10 | 王嘉兴 | Method for preparing co-production sodium chloride of precipitated barium sulfate |
| CN101792168A (en) * | 2009-06-08 | 2010-08-04 | 王嘉兴 | Method for preparing barium sulfate and co-producing sodium chloride |
Non-Patent Citations (1)
| Title |
|---|
| 黄荣春: "锌粉法保险粉生产过程中盐析母液的综合治理与利用", 《化工环保》 * |
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Application publication date: 20120125 |