CN101580264A - Method for co-production of sodium chloride from micro barium sulfate prepared from barium chloride - Google Patents

Abstract

The invention discloses a method for co-producing sodium chloride by using micro barium sulfate prepared by barium chloride, which is technically characterized by comprising the following steps: reacting barium chloride and sodium sulfate according to a certain proportion, filtering to obtain superfine barium sulfate and sodium chloride, filtering to obtain a filter cake, washing, drying, crushing and packaging to obtain a superfine barium sulfate product, and distilling the filtrate under reduced pressure to obtain an industrial salt sodium chloride product. The method is simple, convenient and quick, and particularly uses low-grade barium chloride and sodium sulfate to produce high-grade precipitated barium sulfate, the production process and equipment are simple, the yield is extremely high, and the profit is very high.

Description

A kind of method that the fine barium sulfate prepared with barium chloride co-produces sodium chloride

Technical field:

The invention relates to the technical field of preparation of chemical fillers, in particular to a method for co-producing sodium chloride with fine barium sulfate prepared from barium chloride.

technical background:

There are many ways to produce precipitated barium sulfate, mainly barium ore production. However, the production yield of this method is low, and a large amount of material transportation leads to complex and huge production equipment. The method of preparing precipitated barium sulfate with barium chloride and sodium sulfate is simple and clear, especially the production of high-grade precipitated barium sulfate with low-grade barium chloride and sodium sulfate, the production process and equipment are simple, the yield is huge, and the profit is very high.

Invention content:

The invention provides a method for co-producing sodium chloride with fine barium sulfate prepared by barium chloride. This method is simple and clear, especially for producing high-grade precipitated barium sulfate with low-grade barium chloride and sodium sulfate. The production process And the equipment is simple, the yield is huge, and the profit is very high.

For achieving above-mentioned purpose, technical scheme of the present invention is:

Dissolve barium chloride (5) in water and treat it with 1-3% surfactant and inject it into the reactor (1) at a mass ratio of pure substance (1:0.38-0.98) with the dissolved sodium sulfate (6) at a uniform and low speed. stirring, the number of rotations is 120-300/min for chemical reaction to obtain a mixed liquid of barium sulfate and sodium chloride, centrifuged (2) and filtered to obtain filter cake fine barium sulfate and then washed, dried (3), pulverized (4), The product is packaged, and the filtrate is distilled under reduced pressure to obtain the industrial salt sodium chloride.

Its chemical reaction equation is:

BaCl ₂ +NaSO ₄ ＝BaSO ₄ +2NaCl

Description of drawings:

This figure is a process flow diagram of the present invention, wherein:

1—acid leaching tank, 2—centrifuge, 3—dryer, 4—crusher, 5—barium chloride feeding line, 6—sodium sulfate feeding line.

Specific implementation methods:

Embodiment one: 500 kilograms of barium chloride (5) are dissolved in water and are injected into reactor (1) li with the mass ratio of pure matter 1: 0.38 after the tensio-active agent treatment of 1% and dissolving Stir evenly at low speed at the same time, and the number of revolutions is 120/min to carry out chemical reaction to obtain the mixed liquid of barium sulfate and sodium chloride, centrifuge (2) filter to get filter cake precipitated barium sulfate and then wash, dry (3), pulverize (4 ), the packaging obtains 311.76 finely precipitated barium sulfate products, and the filtrate obtains industrial salt sodium chloride through vacuum distillation. Its chemical reaction equation is:

Embodiment two: 500 kilograms of barium chloride (5) are dissolved in water and are injected into reactor (1) li with the mass ratio 1: 0.98 of the mass ratio of pure substance after 3% tensio-active agent is processed respectively Stir evenly at low speed, and the rotation speed is 300/min to carry out a chemical reaction to obtain a mixed liquid of barium sulfate and sodium chloride, centrifuge (2) filter to obtain a filter cake precipitated barium sulfate, then wash, dry (3), and pulverize (4) , packaged to obtain 560.1 kg of finely precipitated barium sulfate product, and the filtrate was distilled under reduced pressure to obtain industrial salt sodium chloride.

Claims (5)

1. A method for co-producing sodium chloride with barium chloride prepared from fine barium sulfate, which is obtained through the interaction of barium chloride and sodium sulfate. Its technical characteristics are that barium chloride and sodium sulfate react in a certain proportion. While obtaining fine barium sulfate, sodium chloride is also co-produced. 2. a kind of method that the microbarium sulfate coproduction sodium chloride that prepares with barium chloride described in claim 1 is characterized in that barium chloride and sodium sulfate react according to a certain ratio when obtaining microprecipitation barium sulfate Sodium chloride is also co-produced. Its specific technological process is: Dissolve barium chloride (5) in water and treat it with 1-3% surfactant and inject it into the reactor (1) at a mass ratio of pure substance (1:0.38-0.98) with the dissolved sodium sulfate (6) at a uniform and low speed. stirring, and the number of rotations is 120-300 minutes to carry out the chemical reaction to obtain a mixed liquid of barium sulfate and sodium chloride, centrifuge (2) and filter to obtain a fine precipitate of barium sulfate on the filter cake, then wash, dry (3), and pulverize (4), The product is packaged, and the filtrate is distilled under reduced pressure to obtain the industrial salt sodium chloride. 3. a kind of method that the microbarium sulfate coproduction sodium chloride that prepares with barium chloride described in claim 2 is characterized in that described barium chloride (5) is dissolved in water with 1-3% tensio-active agent After the treatment, the dissolved sodium sulfate (6) is injected into the reactor (1) at a mass ratio of 1:0.38-0.98 of the pure substance, and at the same time, it is uniformly stirred at a low speed, and the number of revolutions is 120-300/min for chemical reaction to obtain barium sulfate and sodium chloride mixed liquid. 4. a kind of method that the microbarium sulfate co-production sodium chloride that prepares with barium chloride described in claim 2 is characterized in that described centrifugation (2) is filtered to get the filter cake microfine barium sulfate through washing again, drying (3 ), pulverize (4), and pack to obtain microfine barium sulfate product. 5. a kind of method that the microbarium sulfate coproduction sodium chloride that prepares with barium chloride described in claim 2 is characterized in that described filtrate obtains industrial salt sodium chloride through underpressure distillation.

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