CN102115140A - Method for preparing barium sulfate and co-producing industrial salt with barium chloride waste residues - Google Patents
Method for preparing barium sulfate and co-producing industrial salt with barium chloride waste residues Download PDFInfo
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- CN102115140A CN102115140A CN 201010615461 CN201010615461A CN102115140A CN 102115140 A CN102115140 A CN 102115140A CN 201010615461 CN201010615461 CN 201010615461 CN 201010615461 A CN201010615461 A CN 201010615461A CN 102115140 A CN102115140 A CN 102115140A
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- barium
- bariumchloride
- solution
- sodium
- sulfate
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Abstract
The invention provides a method for preparing barium sulfate and co-producing industrial salt with barium chloride waste residues. The method is characterized in that the barium chloride waste residues are obtained in the process of preparing thiourea through reaction between hydrochloric acid and barium sulfide. The method comprises the following steps: fully dissolving the barium chloride waste residues into water; mixing the solution with surplus hydrochloric acid to react to obtain solution containing barium chloride; mixing the solution containing barium chloride with sodium sulfate to react to generate barium sulfate and sodium chloride and filtering the products to obtain barium sulfate filter cakes and solution containing sodium chloride; washing, grinding and drying the barium sulfate filter cakes to obtain barium sulfate products; and distilling the obtained solution containing sodium chloride into sodium chloride supersaturated solution and dissolving out the sodium chloride crystals to obtain the sodium chloride products. The method has the following beneficial effects: the operation is simple, the equipment investment is low and the active ingredients in the barium sulfide waste residues are converted into the substances which can be used industrially, so the method is economical and applicable.
Description
Technical field
The present invention relates to the disposal of three wastes of inorganic chemical industry thiocarbamide manufacturing and utilize technical field, especially prepare the method for barium sulfate and co-produced Industrial Salt with the bariumchloride waste residue, described is the waste residue of hydrochloric acid and barium sulphide prepared in reaction thiocarbamide gained with the bariumchloride waste residue.
Background technology
The production method of thiocarbamide is a lot, wherein traditional method is to utilize barium sulphide and hydrochloric acid reaction to generate hydrogen sulfide and bariumchloride precipitation, hydrogen sulfide absorbs through the milk of lime negative pressure and makes the hydrogen sulfide calcium solution, then react with calcium cyanamide again, the mol ratio of calcium sulfhydrate and calcium cyanamide is 1: 5, under constantly stirring, temperature of reaction is (80 ± 5) ℃, reaction times is 3h, through negative pressure filtration, can generate thiocarbamide liquid, again through evaporation, filtration, cooling, crystallization, promptly get the crystal thiocarbamide, centrifugal drying gets product.Reaction equation is as follows:
BaS+2HCl→BaC12+H2S↑
CaO+H2O→Ca(OH)2
2H
2S+Ca(OH)
2→Ca(SH)
2+2H
2O
2CaCN
2+Ca(SH
2)
2+6H
2O→2(NH
2)
2CS+3Ca(OH)
2
Aforesaid method is produced thiocarbamide, and its main industrial residue is exactly the bariumchloride waste residue, according to one's analysis, also contains a large amount of barium sulphides in the bariumchloride waste residue.
Summary of the invention
The waste residue of hydrochloric acid and barium sulphide prepared in reaction thiocarbamide gained is bariumchloride waste residue of the present invention, and its main component is a bariumchloride, also contains a large amount of barium sulphides, the invention provides the method for preparing common barium sulfate and Industrial Salt with above-mentioned bariumchloride waste residue.This method is simple to operate, and facility investment is few, and the effective constituent in the bariumchloride waste residue is converted into industrial utilizable material, is an economic and practical method.
Technical scheme of the present invention is as follows: prepare the method for barium sulfate and co-produced Industrial Salt with the bariumchloride waste residue, described is the waste residue of hydrochloric acid and barium sulphide prepared in reaction thiocarbamide gained with the bariumchloride waste residue, comprises following concrete steps:
Steps A: the bariumchloride waste residue fully is dissolved in water, is mainly contained the solution of bariumchloride and barium sulphide, convert the wherein molar content of barium sulphide;
Step B: the steps A gained mainly contained bariumchloride and barium sulfide solution and mixed in hydrochloric acid, the molar content that makes barium sulphide is 1:1.6-2.4 with the ratio of the molar content of hydrogenchloride, hydrochloric acid and barium sulphide reaction generate bariumchloride and hydrogen sulfide, after hydrogen sulfide is overflowed from solution, obtain containing the solution of bariumchloride, the effusion hydrogen sulfide feeds in the sodium hydroxide solution and absorbs, in order to avoid contaminate environment;
Step C: the solution that contains bariumchloride of step B gained is mixed with sodium sulfate, and making the bariumchloride and the ratio of the molar content of the material of sodium sulfate is 1:0.8-1.2; Sodium sulfate and bariumchloride reaction generate barium sulfate and sodium-chlor; After filtration, obtain the solution of sodium sulfate barium filter cake and sodium chloride-containing;
Step D: after barium sulfate filter cake washing, pulverizing and drying, obtain barium sulfate product;
Step e: the solution distillation of the sodium chloride-containing of step C gained is the sodium-chlor supersaturated solution, the sodium-chlor crystallization is separated out, obtain the sodium-chlor product.
Of the present inventionly prepare the method for barium sulfate and co-produced Industrial Salt with the bariumchloride waste residue, related chemical principle is:
BaS+2HCl=====BaCl
2+H
2S
BaCl
2+Na
2SO
4=====BaSO
4↓+2NaCl
Beneficial effect of the present invention is: the method for preparing barium sulfate and co-produced Industrial Salt with the bariumchloride waste residue of the present invention, this method is simple to operate, facility investment is few, and the effective constituent in the bariumchloride waste residue is converted into industrial utilizable material, is an economic and practical method.
Embodiment
Embodiment 1:
Prepare the method for barium sulfate and co-produced Industrial Salt with the bariumchloride waste residue, described is the waste residue of hydrochloric acid and barium sulphide prepared in reaction thiocarbamide gained with the bariumchloride waste residue, comprises following concrete steps:
Steps A: 500kg bariumchloride waste residue fully is dissolved in water, is mainly contained the solution of bariumchloride and barium sulphide, convert the wherein molar content of barium sulphide;
Step B: the steps A gained mainly contained bariumchloride and barium sulfide solution and mixed in hydrochloric acid, the molar content that makes barium sulphide is 1:1.6 with the ratio of the molar content of hydrogenchloride, hydrochloric acid and barium sulphide reaction generate bariumchloride and hydrogen sulfide, after hydrogen sulfide is overflowed from solution, obtain containing the solution of bariumchloride, the effusion hydrogen sulfide feeds in the sodium hydroxide solution and absorbs, in order to avoid contaminate environment;
Step C: the solution that contains bariumchloride of step B gained is mixed with sodium sulfate, and making the bariumchloride and the ratio of the molar content of the material of sodium sulfate is 1:1; Sodium sulfate and bariumchloride reaction generate barium sulfate and sodium-chlor; After filtration, obtain the solution of sodium sulfate barium filter cake and sodium chloride-containing;
Step D: after barium sulfate filter cake washing, pulverizing and drying, obtain barium sulfate product;
Step e: the solution distillation of the sodium chloride-containing of step C gained is the sodium-chlor supersaturated solution, the sodium-chlor crystallization is separated out, obtain the sodium-chlor product.
Embodiment 2:
Prepare the method for barium sulfate and co-produced Industrial Salt with the bariumchloride waste residue, described is the waste residue of hydrochloric acid and barium sulphide prepared in reaction thiocarbamide gained with the bariumchloride waste residue, comprises following concrete steps:
Steps A: 500kg bariumchloride waste residue fully is dissolved in water, is mainly contained the solution of bariumchloride and barium sulphide, convert the wherein molar content of barium sulphide;
Step B: the steps A gained mainly contained bariumchloride and barium sulfide solution and mixed in hydrochloric acid, the molar content that makes barium sulphide is 1:2 with the ratio of the molar content of hydrogenchloride, hydrochloric acid and barium sulphide reaction generate bariumchloride and hydrogen sulfide, after hydrogen sulfide is overflowed from solution, obtain containing the solution of bariumchloride, the effusion hydrogen sulfide feeds in the sodium hydroxide solution and absorbs, in order to avoid contaminate environment;
Step C: the solution that contains bariumchloride of step B gained is mixed with sodium sulfate, and making the bariumchloride and the ratio of the molar content of the material of sodium sulfate is 1:1.2; Sodium sulfate and bariumchloride reaction generate barium sulfate and sodium-chlor; After filtration, obtain the solution of sodium sulfate barium filter cake and sodium chloride-containing;
Step D: after barium sulfate filter cake washing, pulverizing and drying, obtain barium sulfate product;
Step e: the solution distillation of the sodium chloride-containing of step C gained is the sodium-chlor supersaturated solution, the sodium-chlor crystallization is separated out, obtain the sodium-chlor product.
Embodiment 3:
Prepare the method for barium sulfate and co-produced Industrial Salt with 500kg bariumchloride waste residue, described is the waste residue of hydrochloric acid and barium sulphide prepared in reaction thiocarbamide gained with the bariumchloride waste residue, comprises following concrete steps:
Steps A: the bariumchloride waste residue fully is dissolved in water, is mainly contained the solution of bariumchloride and barium sulphide, convert the wherein molar content of barium sulphide;
Step B: the steps A gained mainly contained bariumchloride and barium sulfide solution and mixed in hydrochloric acid, the molar content that makes barium sulphide is 1:2.4 with the ratio of the molar content of hydrogenchloride, hydrochloric acid and barium sulphide reaction generate bariumchloride and hydrogen sulfide, after hydrogen sulfide is overflowed from solution, obtain containing the solution of bariumchloride, the effusion hydrogen sulfide feeds in the sodium hydroxide solution and absorbs, in order to avoid contaminate environment;
Step C: the barium chloride solution that contains of step B gained is mixed with sodium sulfate, and making the bariumchloride and the ratio of the molar content of the material of sodium sulfate is 1:0.8; Sodium sulfate and bariumchloride reaction generate barium sulfate and sodium-chlor; After filtration, obtain the solution of sodium sulfate barium filter cake and sodium chloride-containing;
Step D: after barium sulfate filter cake washing, pulverizing and drying, obtain barium sulfate product;
Step e: the solution distillation of the sodium chloride-containing of step C gained is the sodium-chlor supersaturated solution, the sodium-chlor crystallization is separated out, obtain the sodium-chlor product.
Above content be in conjunction with concrete preferred implementation to further describing that the present invention did, can not assert that concrete enforcement of the present invention is confined to these explanations.For the general technical staff of the technical field of the invention, without departing from the inventive concept of the premise, its framework form can be flexible and changeable, can the subseries product.Just make some simple deduction or replace, all should be considered as belonging to the scope of patent protection that the present invention is determined by claims of being submitted to.
Claims (1)
1. prepare the method for barium sulfate and co-produced Industrial Salt with the bariumchloride waste residue, it is characterized in that, described is the waste residue of hydrochloric acid and barium sulphide prepared in reaction thiocarbamide gained with the bariumchloride waste residue, comprises following concrete steps:
Steps A: the bariumchloride waste residue fully is dissolved in water, is mainly contained the solution of bariumchloride and barium sulphide, convert the wherein molar content of barium sulphide;
Step B: the steps A gained mainly contained bariumchloride and barium sulfide solution and mixed in hydrochloric acid, the molar content that makes barium sulphide is 1:1.6-2.4 with the ratio of the molar content of hydrogenchloride, hydrochloric acid and barium sulphide reaction generate bariumchloride and hydrogen sulfide, after hydrogen sulfide is overflowed from solution, obtain containing the solution of bariumchloride, the effusion hydrogen sulfide feeds in the sodium hydroxide solution and absorbs, in order to avoid contaminate environment;
Step C: the solution that contains bariumchloride of step B gained is mixed with sodium sulfate, and making the bariumchloride and the ratio of the molar content of the material of sodium sulfate is 1:0.8-1.2; Sodium sulfate and bariumchloride reaction generate barium sulfate and sodium-chlor; After filtration, obtain the solution of sodium sulfate barium filter cake and sodium chloride-containing;
Step D: after barium sulfate filter cake washing, pulverizing and drying, obtain barium sulfate product;
Step e: the solution distillation of the sodium chloride-containing of step C gained is the sodium-chlor supersaturated solution, the sodium-chlor crystallization is separated out, obtain the sodium-chlor product.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010615461 CN102115140A (en) | 2010-12-31 | 2010-12-31 | Method for preparing barium sulfate and co-producing industrial salt with barium chloride waste residues |
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|---|---|---|---|
| CN 201010615461 CN102115140A (en) | 2010-12-31 | 2010-12-31 | Method for preparing barium sulfate and co-producing industrial salt with barium chloride waste residues |
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| Publication Number | Publication Date |
|---|---|
| CN102115140A true CN102115140A (en) | 2011-07-06 |
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|---|---|---|---|
| CN 201010615461 Pending CN102115140A (en) | 2010-12-31 | 2010-12-31 | Method for preparing barium sulfate and co-producing industrial salt with barium chloride waste residues |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109970089A (en) * | 2019-05-20 | 2019-07-05 | 长沙中硅水泥技术开发有限公司 | A kind of method and system preparing barium sulfate using barium slag |
-
2010
- 2010-12-31 CN CN 201010615461 patent/CN102115140A/en active Pending
Non-Patent Citations (1)
| Title |
|---|
| 《现代化工》 19940820 郭斌等 含钡废渣酸浸法制取硫酸钡 第26页 1 , 第8期 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109970089A (en) * | 2019-05-20 | 2019-07-05 | 长沙中硅水泥技术开发有限公司 | A kind of method and system preparing barium sulfate using barium slag |
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Application publication date: 20110706 |