CN102115118A - Method for preparing calcium sulfide, calcium carbonate and sodium hydroxide from sodium sulphide waste - Google Patents
Method for preparing calcium sulfide, calcium carbonate and sodium hydroxide from sodium sulphide waste Download PDFInfo
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- CN102115118A CN102115118A CN2010106154823A CN201010615482A CN102115118A CN 102115118 A CN102115118 A CN 102115118A CN 2010106154823 A CN2010106154823 A CN 2010106154823A CN 201010615482 A CN201010615482 A CN 201010615482A CN 102115118 A CN102115118 A CN 102115118A
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Abstract
The invention provides a method for preparing calcium sulfide, calcium carbonate and sodium hydroxide from sodium sulphide waste. The sodium sulphide waste mixes and reacts with calcium bicarbonate to produce a mixture containing calcium sulfide, sodium carbonate and sodium bicarbonate; the mixture is filtered to produce a clear filtrate containing sodium carbonate and sodium bicarbonate and a filter cake containing calcium sulfide; the filter cake containing calcium sulfide is washed, dried and pulverized to produce a calcium sulfide product; the filtrate containing sodium carbonate and sodium bicarbonate reacts with an excessive amount of calcium hydroxide solution to produce a mixture containing calcium carbonate precipitates and sodium hydroxide solution; the mixture is filtered to produce a filter cake of calcium carbonate and a liquid containing sodium hydroxide; the filter cake of calcium carbonate is washed, dried and pulverized to obtain a calcium carbonate product; and the liquid containing sodium hydroxide is distilled to produce a supersaturated solution of sodium hydroxide, and the supersaturated solution of sodium hydroxide is spray-dried to obtain a sodium hydroxide product. The method eliminates the environmental pollution due to the sodium sulphide waste, makes the best use of the potential value of the sodium sulfide waste, achieves the purpose of turning waste into treasure, and has a high practical value.
Description
Technical field
The present invention relates to the improvement of barium sulfate by-product sodium sulfide method gained Sodium Sulphide waste residue and the technical field of utilization, be particularly related to the method for preparing sulfurated lime, lime carbonate and sodium hydroxide with the Sodium Sulphide waste residue, its raw material is a barium sulfate by-product sodium sulfide method gained Sodium Sulphide waste residue.
Background technology
The industrial process of Sodium Sulphide (sodium sulphite) mainly contains coal dust reduction of mirabilite method, gas reduction method, barium sulfate by-product sodium sulfide method and hydrogen sulfide method.Wherein, barium sulfate by-product sodium sulfide method is to produce barium sulphide with coal reduction barium sulfate, adds metabisulfite solution again and handles, and generates sodium sulphite and process white, separates evaporation concentration and getting through suction filtration.This method is discharged a large amount of Sodium Sulphide waste residues, and is wherein most of from carbon contained in the coal, and fails isolating sodium sulphite.After testing, the content of yellow soda ash in this Sodium Sulphide waste residue reaches 12-15%, and sodium sulphite is 25-30%.
Total institute is known, and sodium sulphite is very easily water-soluble, and the aqueous solution is strong basicity, and extremely strong pungency and corrodibility are arranged when contacting with mucous membrane with skin, can cause when touching skin and hair and burn.Especially react the hydrogen sulfide that generates with water, behind the absorption human body, thereby cause the extremely death of poisoning, therefore,, not only can cause environmental pollution, also have certain potential safety hazard if the Sodium Sulphide waste residue is not used and administers.
Therefore, be necessary to explore the method for from the Sodium Sulphide waste residue, extracting sodium sulphite, thereby effectively excavate the potential value of Sodium Sulphide waste residue, eliminate environmental pollution and potential safety hazard.
Summary of the invention
The objective of the invention is to, the method for preparing sulfurated lime, lime carbonate and sodium hydroxide with the Sodium Sulphide waste residue is provided, its raw material is a barium sulfate by-product sodium sulfide method gained Sodium Sulphide waste residue, this method is simple to operate, facility investment is few, made full use of the potential value of barium sulfate by-product sodium sulfide method gained Sodium Sulphide waste residue, realized turning waste into wealth, eliminated of the pollution of Sodium Sulphide waste residue environment.
Technical scheme of the present invention is as follows: prepare the method for sulfurated lime, lime carbonate and sodium hydroxide with the Sodium Sulphide waste residue, its raw material is a barium sulfate by-product sodium sulfide method gained Sodium Sulphide waste residue, comprises the steps:
Steps A: carbonate content in the conversion Sodium Sulphide waste residue, and configuration Sodium Sulphide waste residue suspension liquid and calcium bicarbonate solution;
Step B: with Sodium Sulphide waste residue suspension liquid and calcium bicarbonate solution with sodium sulphite with successively drop in the protection against corrosion reactor with ratio 1:0.8～1.2 of the molar content of Calcium hydrogen carbonate pure substance, carry out chemical reaction, at this moment, owing to being combined into sulfurated lime, calcium ion and sulfonium ion precipitate, thereby, be reacted to last, calcium ions or contain the calcium ion of minute quantity not in the solution, thus obtain the mixture of Containing Sulfur calcium, yellow soda ash and sodium bicarbonate;
Step C: step B gained mixture is filtered through filter, filter the clarifying solution of yellow soda ash and sodium bicarbonate and the filter cake of Containing Sulfur calcium of containing;
Step D: the filter cake of the Containing Sulfur calcium that step C is obtained is through washing, and drying is pulverized, and obtains the sulfurated lime product;
Step e: configuration aqua calcis, the solution that contains yellow soda ash and sodium bicarbonate that step C is obtained mixes with the excessive hydrogen calcium oxide solution, in the hydroxide ion and hydrogen-carbonate with the hydrogen in the ion, thereby the release carbanion, then calcium ion and carbonic acid are that lime carbonate precipitates with ionic bond, thereby, be reacted to last, contain sodium ion in the solution, hydroxide ion, thus obtain containing the mixture of carbonic acid calcium deposit and sodium hydroxide solution;
Step F: step e gained mixture is filtered, obtain calcium carbonate filter cake and the solution that contains sodium hydroxide;
Step G: through washing, drying is pulverized, and obtains calcium carbonate product with calcium carbonate filter cake;
Step H: the solution distillation that will contain sodium hydroxide is the sodium hydroxide supersaturated solution, and spraying drying obtains the sodium hydroxide product.
Before the configuration Sodium Sulphide waste residue suspension liquid, earlier described Sodium Sulphide waste residue is ground into the 80-100 order.
The principle of the chemical reaction of the method for preparing sulfurated lime, lime carbonate and sodium hydroxide with the Sodium Sulphide waste residue of the present invention is:
Na2S+?Ca(HCO3)2=====?CaS↓+2?NaHCO3
2NaHCO3++?Ca（OH）2?=====?CaCO3↓+Na2CO3?+2H2O
Na2CO3+?Ca（OH）2?=====?CaCO3↓+2?NaOH
The invention has the beneficial effects as follows: the method for preparing sulfurated lime, lime carbonate and sodium hydroxide with the Sodium Sulphide waste residue of the present invention, this method will be converted into industrial raw material sulfurated lime, lime carbonate and sodium hydroxide with the Sodium Sulphide waste residue of barium sulfate by-product sodium sulfide method gained, thereby eliminated in the Sodium Sulphide waste residue sodium sulphite to the pollution of environment, effectively utilized the potential value of Sodium Sulphide waste residue, having realized turning waste into wealth, is a method of great practical value.
Embodiment
Embodiment 1
Prepare the method for sulfurated lime, lime carbonate and sodium hydroxide with the Sodium Sulphide waste residue, its raw material is a barium sulfate by-product sodium sulfide method gained Sodium Sulphide waste residue, comprises the steps:
Steps A: carbonate content in the conversion Sodium Sulphide waste residue, and the Sodium Sulphide waste residue is pulverized is 80 orders, then disposes Sodium Sulphide waste residue suspension liquid and calcium bicarbonate solution;
Step B: Sodium Sulphide waste residue suspension liquid and calcium bicarbonate solution are successively dropped in the protection against corrosion reactor with ratio 1:0.8 with the molar content of Calcium hydrogen carbonate pure substance with sodium sulphite, carry out chemical reaction, obtain the mixture of Containing Sulfur calcium, yellow soda ash and sodium bicarbonate;
Step C: step B gained mixture is filtered through filter, filter the clarifying solution of yellow soda ash and sodium bicarbonate and the filter cake of Containing Sulfur calcium of containing;
Step D: the filter cake of the Containing Sulfur calcium that step C is obtained is through washing, and drying is pulverized, and obtains the sulfurated lime product;
Step e: the configuration aqua calcis, the solution that contains yellow soda ash and sodium bicarbonate that step C is obtained mixes with the excessive hydrogen calcium oxide solution, obtains containing the mixture of carbonic acid calcium deposit and sodium hydroxide solution;
Step F: step e gained mixture is filtered, obtain calcium carbonate filter cake and the solution that contains sodium hydroxide;
Step G: through washing, drying is pulverized, and obtains calcium carbonate product with calcium carbonate filter cake;
Step H: the solution distillation that will contain sodium hydroxide is the sodium hydroxide supersaturated solution, and spraying drying obtains the sodium hydroxide product.
Embodiment 2
Prepare the method for sulfurated lime, lime carbonate and sodium hydroxide with the Sodium Sulphide waste residue, its raw material is a barium sulfate by-product sodium sulfide method gained Sodium Sulphide waste residue, comprises the steps:
Steps A: carbonate content in the conversion Sodium Sulphide waste residue, and the Sodium Sulphide waste residue is pulverized is 90 orders, then disposes Sodium Sulphide waste residue suspension liquid and calcium bicarbonate solution;
Step B: Sodium Sulphide waste residue suspension liquid and calcium bicarbonate solution are successively dropped in the protection against corrosion reactor with ratio 1:1 with the molar content of Calcium hydrogen carbonate pure substance with sodium sulphite, carry out chemical reaction, obtain the mixture of Containing Sulfur calcium, yellow soda ash and sodium bicarbonate;
Step C: step B gained mixture is filtered through filter, filter the clarifying solution of yellow soda ash and sodium bicarbonate and the filter cake of Containing Sulfur calcium of containing;
Step D: the filter cake of the Containing Sulfur calcium that step C is obtained is through washing, and drying is pulverized, and obtains the sulfurated lime product;
Step e: the configuration aqua calcis, the solution that contains yellow soda ash and sodium bicarbonate that step C is obtained mixes with the excessive hydrogen calcium oxide solution, obtains containing the mixture of carbonic acid calcium deposit and sodium hydroxide solution;
Step F: step e gained mixture is filtered, obtain calcium carbonate filter cake and the solution that contains sodium hydroxide;
Step G: through washing, drying is pulverized, and obtains calcium carbonate product with calcium carbonate filter cake;
Step H: the solution distillation that will contain sodium hydroxide is the sodium hydroxide supersaturated solution, and spraying drying obtains the sodium hydroxide product.
Embodiment 3
Prepare the method for sulfurated lime, lime carbonate and sodium hydroxide with the Sodium Sulphide waste residue, its raw material is a barium sulfate by-product sodium sulfide method gained Sodium Sulphide waste residue, comprises the steps:
Steps A: carbonate content in the conversion Sodium Sulphide waste residue, and the Sodium Sulphide waste residue is pulverized is 100 orders, then disposes Sodium Sulphide waste residue suspension liquid and calcium bicarbonate solution;
Step B: Sodium Sulphide waste residue suspension liquid and calcium bicarbonate solution are successively dropped in the protection against corrosion reactor with ratio 1:1.2 with the molar content of Calcium hydrogen carbonate pure substance with sodium sulphite, carry out chemical reaction, obtain the mixture of Containing Sulfur calcium, yellow soda ash and sodium bicarbonate;
Step C: step B gained mixture is filtered through filter, filter the clarifying solution of yellow soda ash and sodium bicarbonate and the filter cake of Containing Sulfur calcium of containing;
Step D: the filter cake of the Containing Sulfur calcium that step C is obtained is through washing, and drying is pulverized, and obtains the sulfurated lime product;
Step e: the configuration aqua calcis, the solution that contains yellow soda ash and sodium bicarbonate that step C is obtained mixes with the excessive hydrogen calcium oxide solution, obtains containing the mixture of carbonic acid calcium deposit and sodium hydroxide solution;
Step F: step e gained mixture is filtered, obtain calcium carbonate filter cake and the solution that contains sodium hydroxide;
Step G: through washing, drying is pulverized, and obtains calcium carbonate product with calcium carbonate filter cake;
Step H: the solution distillation that will contain sodium hydroxide is the sodium hydroxide supersaturated solution, and spraying drying obtains the sodium hydroxide 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 method.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 (2)
1. prepare the method for sulfurated lime, lime carbonate and sodium hydroxide with the Sodium Sulphide waste residue, it is characterized in that, its raw material is a barium sulfate by-product sodium sulfide method gained Sodium Sulphide waste residue, comprises the steps:
Steps A: carbonate content in the conversion Sodium Sulphide waste residue, and configuration Sodium Sulphide waste residue suspension liquid and calcium bicarbonate solution;
Step B: with Sodium Sulphide waste residue suspension liquid and calcium bicarbonate solution with sodium sulphite with successively drop in the protection against corrosion reactor with ratio 1:0.8～1.2 of the molar content of Calcium hydrogen carbonate pure substance, carry out chemical reaction, obtain the mixture of Containing Sulfur calcium, yellow soda ash and sodium bicarbonate;
Step C: step B gained mixture is filtered through filter, filter the clarifying solution of yellow soda ash and sodium bicarbonate and the filter cake of Containing Sulfur calcium of containing;
Step D: the filter cake of the Containing Sulfur calcium that step C is obtained is through washing, and drying is pulverized, and obtains the sulfurated lime product;
Step e: the configuration aqua calcis, the solution that contains yellow soda ash and sodium bicarbonate that step C is obtained mixes with the excessive hydrogen calcium oxide solution, obtains containing the mixture of carbonic acid calcium deposit and sodium hydroxide solution;
Step F: step e gained mixture is filtered, obtain calcium carbonate filter cake and the solution that contains sodium hydroxide;
Step G: through washing, drying is pulverized, and obtains calcium carbonate product with calcium carbonate filter cake;
Step H: the solution distillation that will contain sodium hydroxide is the sodium hydroxide supersaturated solution, and spraying drying obtains the sodium hydroxide product.
2. as claimed in claim 1ly prepare the method for sulfurated lime, lime carbonate and sodium hydroxide, it is characterized in that, before the configuration Sodium Sulphide waste residue suspension liquid, earlier described Sodium Sulphide waste residue is ground into the 80-100 order with the Sodium Sulphide waste residue.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112551552A (en) * | 2020-09-24 | 2021-03-26 | 宣城市楷昂化工有限公司 | Method for preparing sodium hydroxide by using carbon dioxide |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112551552A (en) * | 2020-09-24 | 2021-03-26 | 宣城市楷昂化工有限公司 | Method for preparing sodium hydroxide by using carbon dioxide |
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Application publication date: 20110706 |