Barium chloride production technology

Abstract

The invention discloses a technology for producing barium chloride by the witherite containing barium carbonate, which mainly comprises steps as follows: sulfur iron impurities are decomposed and oxidated to remove and the hydrated barium salt raw material liquid is prepared; the raw material liquid is electrically heated and concentrated in vacuum, which is driven by an axial flow pump, the solute is thermally crystallized to form the hydrated barium chloride dihydrate saturated crystalline; the crystallized hydrate is cooled to produce the serial barium salt products, wherein the vacuum heating condensation crystallization is a continuous production process; the whole technological process is implemented in the closed state; the by-products could be recycled; the crystallisation processis completed at one time and the production process is continuous. The products manufactured in the technological process has low impurity content, saves energy, is adaptive to the large-scale industrialization production and reduces the pollution and resource waste to a large extent.

Description

technical field

[0001] The invention relates to the field of chemical industry, in particular to a production process for producing barium chloride from barium carbonate. Background technique

[0002] At present, there are many ways to produce barium chloride, mainly using barite as raw material, such as reducing and melting barite and coal powder, then reacting with hydrochloric acid to produce barium chloride, and using barite as raw material , with coal powder and calcium water for reduction melting, leaching, desulfurization and other treatments to produce barium chloride. The above-mentioned method for producing barium chloride not only has high energy consumption and high labor intensity, but also the treatment of the three wastes is not easy, causing pollution to the environment.

[0003] Another method is to produce barium chloride with witherite as raw material. The main component of witherite is barium carbonate. The reaction of witherite and hydrochloric acid to...

Examples

Embodiment 1

[0029] Embodiment 1: by witherite containing barium carbonate 65% by weight, by witherite: hydrochloric acid: water: hydrogen peroxide by 1: 0.37: 1: 0.1 ratio mixture 1 is input in reactor 2 at a constant speed, chemical reaction takes place, wherein hydrochloric acid The weight percent concentration is 30-32%, and the weight percent concentration of hydrogen peroxide is ≥ 29%. Free sulfur (S) and iron (Fe) undergo oxidation reaction with hydrogen peroxide and generate precipitates. The filter residue, the filtrate is barium chloride hydrate raw material solution, the released carbon dioxide is recovered and purified through outlet 3 to produce barium carbonate, and the filter residue is used as cement additive; Keep the temperature in the crystallization tank 21 at 100°C to 113°C, preferably 103°C. The vacuum condensation recovery device 10 sucks water vapor and condenses it for reuse. The vacuum is maintained at 10 to 30Kpa. Under the drive, in the crystallization kettle 21...

Embodiment 3

[0039] Embodiment 3: Repeat Example 1 according to the same steps as described, but witherite contains barium carbonate in 50% by weight, witherite: hydrochloric acid: water: hydrogen peroxide is mixed in a ratio of 1.3: 0.37: 1: 0.1 for a uniform input reaction In kettle 2, a chemical reaction takes place. Gained product barium chloride is identical with embodiment 1.

Embodiment 4

[0040] Embodiment 4: Repeat Example 1 according to the same steps as described, but witherite contains barium carbonate in 70% by weight, witherite: hydrochloric acid: water: hydrogen peroxide is mixed in a ratio of 0.93: 0.37: 1: 0.1 for 1 uniform input reaction In kettle 2, a chemical reaction takes place. Gained product barium chloride is identical with embodiment 1.

technical field

[0001] The invention relates to the field of chemical industry, in particular to a production process for producing barium chloride from barium carbonate. Background technique

[0002] At present, there are many ways to produce barium chloride, mainly using barite as raw material, such as reducing and melting barite and coal powder, then reacting with hydrochloric acid to produce barium chloride, and using barite as raw material , with coal powder and calcium water for reduction melting, leaching, desulfurization and other treatments to produce barium chloride. The above-mentioned method for producing barium chloride not only has high energy consumption and high labor intensity, but also the treatment of the three wastes is not easy, causing pollution to the environment.

[0003] Another method is to produce barium chloride with witherite as raw material. The main component of witherite is barium carbonate. The reaction of witherite and hydrochloric acid to...

Examples

Embodiment 1

[0029] Embodiment 1: by witherite containing barium carbonate 65% by weight, by witherite: hydrochloric acid: water: hydrogen peroxide by 1: 0.37: 1: 0.1 ratio mixture 1 is input in reactor 2 at a constant speed, chemical reaction takes place, wherein hydrochloric acid The weight percent concentration is 30-32%, and the weight percent concentration of hydrogen peroxide is ≥ 29%. Free sulfur (S) and iron (Fe) undergo oxidation reaction with hydrogen peroxide and generate precipitates. The filter residue, the filtrate is barium chloride hydrate raw material solution, the released carbon dioxide is recovered and purified through outlet 3 to produce barium carbonate, and the filter residue is used as cement additive; Keep the temperature in the crystallization tank 21 at 100°C to 113°C, preferably 103°C. The vacuum condensation recovery device 10 sucks water vapor and condenses it for reuse. The vacuum is maintained at 10 to 30Kpa. Under the drive, in the crystallization kettle 21...

Embodiment 3

[0039] Embodiment 3: Repeat Example 1 according to the same steps as described, but witherite contains barium carbonate in 50% by weight, witherite: hydrochloric acid: water: hydrogen peroxide is mixed in a ratio of 1.3: 0.37: 1: 0.1 for a uniform input reaction In kettle 2, a chemical reaction takes place. Gained product barium chloride is identical with embodiment 1.

Embodiment 4

[0040] Embodiment 4: Repeat Example 1 according to the same steps as described, but witherite contains barium carbonate in 70% by weight, witherite: hydrochloric acid: water: hydrogen peroxide is mixed in a ratio of 0.93: 0.37: 1: 0.1 for 1 uniform input reaction In kettle 2, a chemical reaction takes place. Gained product barium chloride is identical with embodiment 1.

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