CN102115115A - Method for preparing barium carbonate, calcium sulfide and sodium hydroxide by sodium sulfide waste residue - Google Patents

Abstract

The invention provides a method for preparing barium carbonate, calcium sulfide and sodium hydroxide by sodium sulfide waste residue, which comprises the steps of: taking the sodium sulfide waste residue obtained by a method of by-product sodium sulfide of barium sulfate as raw material; mixing the sodium sulfide waste residue and barium hydroxide solution for reaction, and obtaining mixture containing the barium carbonate, the sodium hydroxide and sodium sulfide; filtering the obtained mixture and obtaining clear solution containing the sodium hydroxide and the sodium sulfide as well as a filter cake containing the barium carbonate; washing, drying and grinding the filter cake containing the barium carbonate, and obtaining the barium carbonate product; mixing the solution containing the sodium hydroxide and the sodium sulfide to have reaction with calcium hydroxide solution, filtering and obtaining a calcium sulfide filter cake and sodium hydroxide solution; washing, drying and grinding the calcium sulfide filter cake, and obtaining the calcium sulfide product; and finally, leading the sodium hydroxide solution to be distilled into supersaturated solution, spray drying and obtaining the sodium hydroxide product. The method eliminates the pollution of the sodium sulfide waste residue for the environment, and effectively utilizes the potential value of the sodium sulfide waste residue, thus changing waste into valuable, and being good in practical value.

Description

The method for preparing barium carbonate, sulfurated lime and sodium hydroxide with the Sodium Sulphide waste residue

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 barium carbonate, sulfurated lime 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 barium carbonate, sulfurated lime 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 barium carbonate, sulfurated lime 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 barium hydroxide solution;

Step B: Sodium Sulphide waste residue suspension liquid and barium hydroxide solution are successively dropped in the protection against corrosion reactor with the yellow soda ash and ratio 1:0.8～1.2 of the molar content of hydrated barta pure substance, carry out chemical reaction, at this moment, owing to being combined into barium carbonate, barium ion and carbanion precipitate, thereby, be reacted at last, do not contain barium ion in the solution or contain the barium ion of minute quantity, thereby obtain containing the mixture of barium carbonate, sodium hydroxide and sodium sulphite;

Step C: step B gained mixture is filtered through filter, filter the clarifying filter cake that contains the solution of sodium hydroxide and sodium sulphite and contain barium carbonate;

Step D: with the filter cake process washing that contains barium carbonate that step C obtains, drying is pulverized, and obtains barium carbonate product.

Step e: configuration aqua calcis, ratio by sodium sulphite and the molar content of the pure substance of calcium hydroxide is solution that contains sodium hydroxide and sodium sulphite and the aqua calcis hybrid reaction that 1:0.8-1.2 obtains step C, at this moment, calcium ion and sulfonium ion are combined into sulfurated lime and precipitate, thereby, be reacted at last, contain minute quantity calcium ion and sulfonium ion in the solution, thereby obtain the mixture of Containing Sulfur calcium deposit and sodium hydroxide solution;

Step F: step e gained mixture is filtered, obtain calcium sulfide filter cake and the solution that contains sodium hydroxide;

Step G: through washing, drying is pulverized, and obtains the sulfurated lime product with calcium sulfide 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 barium carbonate, sulfurated lime and sodium hydroxide with the Sodium Sulphide waste residue of the present invention is:

Na2CO3+?Ba(OH)2?=====?BaCO3↓+2NaOH

Na2S+Ca(OH?)2?=====?CaS↓+2NaOH

The invention has the beneficial effects as follows: the method for preparing barium carbonate, sulfurated lime and sodium hydroxide with the Sodium Sulphide waste residue of the present invention, this method will be converted into industrial raw material barium carbonate, sulfurated lime 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 barium carbonate, sulfurated lime 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 barium hydroxide solution;

Step B: Sodium Sulphide waste residue suspension liquid and barium hydroxide solution are successively dropped in the protection against corrosion reactor with the ratio 1:0.8 of yellow soda ash with the molar content of hydrated barta pure substance, carry out chemical reaction, obtain containing the mixture of barium carbonate, sodium hydroxide and sodium sulphite;

Step C: step B gained mixture is filtered through filter, filter the clarifying filter cake that contains the solution of sodium hydroxide and sodium sulphite and contain barium carbonate;

Step D: with the filter cake process washing that contains barium carbonate that step C obtains, drying is pulverized, and obtains barium carbonate product.

Step e: configuration aqua calcis, the mixture that obtains Containing Sulfur calcium deposit and sodium hydroxide solution by the ratio of sodium sulphite and the molar content of the pure substance of calcium hydroxide solution that contains sodium hydroxide and sodium sulphite that to be 1:0.8 obtain step C and aqua calcis hybrid reaction;

Step F: step e gained mixture is filtered, obtain calcium sulfide filter cake and the solution that contains sodium hydroxide;

Step G: through washing, drying is pulverized, and obtains the sulfurated lime product with calcium sulfide 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 barium carbonate, sulfurated lime 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 barium hydroxide solution;

Step B: Sodium Sulphide waste residue suspension liquid and barium hydroxide solution are successively dropped in the protection against corrosion reactor with the ratio 1:1 of yellow soda ash with the molar content of hydrated barta pure substance, carry out chemical reaction, at this moment, owing to being combined into barium carbonate, barium ion and carbanion precipitate, thereby, be reacted at last, do not contain barium ion in the solution or contain the barium ion of minute quantity, thereby obtain containing the mixture of barium carbonate, sodium hydroxide and sodium sulphite;

Step C: step B gained mixture is filtered through filter, filter the clarifying filter cake that contains the solution of sodium hydroxide and sodium sulphite and contain barium carbonate;

Step D: with the filter cake process washing that contains barium carbonate that step C obtains, drying is pulverized, and obtains barium carbonate product.

Step e: configuration aqua calcis, ratio by sodium sulphite and the molar content of the pure substance of calcium hydroxide is solution that contains sodium hydroxide and sodium sulphite and the aqua calcis hybrid reaction that 1:1 obtains step C, at this moment, calcium ion and sulfonium ion are combined into sulfurated lime and precipitate, thereby, be reacted at last, contain minute quantity calcium ion and sulfonium ion in the solution, thereby obtain the mixture of Containing Sulfur calcium deposit and sodium hydroxide solution;

Step F: step e gained mixture is filtered, obtain calcium sulfide filter cake and the solution that contains sodium hydroxide;

Step G: through washing, drying is pulverized, and obtains the sulfurated lime product with calcium sulfide 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 barium carbonate, sulfurated lime 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 barium hydroxide solution;

Step B: Sodium Sulphide waste residue suspension liquid and barium hydroxide solution are successively dropped in the protection against corrosion reactor with the ratio 1:1.2 of yellow soda ash with the molar content of hydrated barta pure substance, carry out chemical reaction, at this moment, owing to being combined into barium carbonate, barium ion and carbanion precipitate, thereby, be reacted at last, do not contain barium ion in the solution or contain the barium ion of minute quantity, thereby obtain containing the mixture of barium carbonate, sodium hydroxide and sodium sulphite;

Step C: step B gained mixture is filtered through filter, filter the clarifying filter cake that contains the solution of sodium hydroxide and sodium sulphite and contain barium carbonate;

Step D: with the filter cake process washing that contains barium carbonate that step C obtains, drying is pulverized, and obtains barium carbonate product;

Step e: configuration aqua calcis, ratio by sodium sulphite and the molar content of the pure substance of calcium hydroxide is solution that contains sodium hydroxide and sodium sulphite and the aqua calcis hybrid reaction that 1:1.2 obtains step C, at this moment, calcium ion and sulfonium ion are combined into sulfurated lime and precipitate, thereby, be reacted at last, contain minute quantity calcium ion and sulfonium ion in the solution, thereby obtain the mixture of Containing Sulfur calcium deposit and sodium hydroxide solution;

Step F: step e gained mixture is filtered, obtain calcium sulfide filter cake and the solution that contains sodium hydroxide;

Step G: through washing, drying is pulverized, and obtains the sulfurated lime product with calcium sulfide 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 barium carbonate, sulfurated lime 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 barium hydroxide octahydrate solution;

Step B: Sodium Sulphide waste residue suspension liquid and barium hydroxide solution are successively dropped in the protection against corrosion reactor with the yellow soda ash and ratio 1:0.8～1.2 of the molar content of hydrated barta pure substance, carry out chemical reaction, obtain containing the mixture of barium carbonate, sodium hydroxide and sodium sulphite;

Step C: step B gained mixture is filtered through filter, filter the clarifying filter cake that contains the solution of sodium hydroxide and sodium sulphite and contain barium carbonate;

Step D: with the filter cake process washing that contains barium carbonate that step C obtains, drying is pulverized, and obtains barium carbonate product;

Step e: configuration aqua calcis, the mixture that obtains Containing Sulfur calcium deposit and sodium hydroxide solution by the ratio of sodium sulphite and the molar content of the pure substance of calcium hydroxide solution that contains sodium hydroxide and sodium sulphite that to be 1:0.8-1.2 obtain step C and aqua calcis hybrid reaction;

Step F: step e gained mixture is filtered, obtain calcium sulfide filter cake and the solution that contains sodium hydroxide;

Step G: through washing, drying is pulverized, and obtains the sulfurated lime product with calcium sulfide 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 barium carbonate, sulfurated lime 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.