Calcium bromide (CaBr ₂) is an inorganic compound with characteristics such as easy solubility in water, strong moisture absorption, and stable chemical properties. Its application scenarios mainly revolve around the three core areas of "moisture absorption and prevention", "industrial additives", and "pharmaceutical functions", covering the following industries:
1、 Oil and gas industry (core application areas)
      Calcium bromide is a key drilling fluid additive in oil and gas extraction, with the core function of "regulating drilling fluid density and inhibiting formation reactions". Specific application scenarios:
      Drilling fluid weighting agent: Calcium bromide solution (with a density of up to 1.8-2.3 g/cm ³) can be used as a high-density drilling fluid to balance the high-pressure formation pressure underground and prevent blowouts and lost circulation; Especially suitable for "high-pressure and leak prone" formations such as shale gas and deep-sea oil and gas. Compared with traditional weighting agents (such as barite), its solution flowability is better and it is less likely to block oil and gas channels.
       Composition of completion fluid: During the completion stage of oil and gas wells, calcium bromide solution can be used as a "solid free completion fluid" to avoid damage to the oil and gas reservoir by solid particles, while inhibiting the expansion of formation clay and protecting wellbore stability.
       Workover operation: Used as well control fluid during downhole well repair to prevent the overflow of formation fluids (oil, gas, water) during the repair process and ensure operational safety.
2、 Pharmaceutical industry
      Calcium bromide is mainly used in the pharmaceutical field for its physiological effects of "sedation and anticonvulsant" as a raw material for inorganic bromide drugs. Specific applications include:
      Central nervous system inhibitory drugs: used to prepare "calcium bromide injection", clinically can alleviate symptoms such as neurasthenia, insomnia, and epileptic seizures, and exert sedative effects by inhibiting central nervous system excitability; It can also be used to treat allergic diseases such as urticaria and eczema, and assist in relieving skin itching.
      Other pharmaceutical uses: as an additive in certain dental materials to regulate material hardness; Or as a pharmaceutical intermediate, participate in the synthesis reactions of some drugs.
3、 Desiccant and moisture-proof industry
      Calcium bromide has extremely strong hygroscopicity (it can absorb moisture from the air to form hydrates, such as CaBr ₂ · 6H ₂ O), and is not easily clumped after moisture absorption. It is the core component of high-efficiency hygroscopic agents and is suitable for:
       Industrial moisture-proof: used for moisture-proof of warehouses, containers, and precision instruments (such as electronic equipment and optical instruments), to prevent goods from mold and rust due to moisture; Especially suitable for high humidity environments (such as southern rainy season and coastal areas).
       Moisture prevention of food and drugs: As a "food grade moisture absorbent" (which must comply with food additive standards), it is used to prevent moisture and extend the shelf life of sealed packaging of food (such as biscuits, nuts) and drugs (such as capsules, tablets); But it is necessary to strictly control the dosage and avoid direct contact with food/medicine.
       Air conditioning and dehumidification equipment: In industrial dehumidifiers and rotary dehumidifiers, calcium bromide solution can serve as a "hygroscopic carrier" to absorb moisture from the air through circulation and reduce environmental humidity.
4、 Metallurgical and metal processing industry
      Calcium bromide mainly plays a role in "melting and refining" in metal processing, with specific applications:
      Metal refining flux: In the refining of non-ferrous metals such as aluminum and magnesium, calcium bromide can lower the refining temperature, improve the flowability of slag, help remove impurities (such as oxides and sulfides) from the metal, and increase the purity of the metal.
      Welding and cutting aids: As a component of welding protectants, they reduce the oxidation of metals during the welding process; Or used as a coolant additive in metal cutting to improve cutting efficiency and protect the tool.
5、 Other industries
      Firefighting industry: Calcium bromide solution has certain fire extinguishing properties and can be used as a "flame retardant additive" to prepare fireproof coatings, flame-retardant plastics, and enhance the high temperature resistance and flame retardant effect of materials.
      Photography and printing industry: In traditional film photography, calcium bromide can be used as a component of photosensitive materials to adjust the sensitivity of the film; Or used as a desiccant for printing ink to accelerate the drying and curing of ink.
      Laboratory and Analytical Chemistry: Used as a chemical reagent for water quality analysis (detecting sulfates in water), catalyst or co solvent for organic synthesis reactions.

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