Calcium bromide is an inorganic calcium salt with the chemical formula CaBr ₂, which is easily soluble in water. Its core functions are concentrated in four major fields: oilfield drilling, medicine, refrigeration, and chemical engineering. At the same time, it has auxiliary applications in environmental protection, building materials, and other fields. It is classified and sorted according to its core scenarios, with a clear structure that is suitable for industrial/civilian use
1、 Core application scenario 1: Oilfield drilling (large usage, industrial core use)
      This is the main application area of calcium bromide, which focuses on the core weighting agent of high-density drilling fluid/completion fluid
1. Core function: Adjust drilling fluid density and balance downhole pressure
      Calcium bromide is easily soluble in water and can be used to prepare high-density solid free drilling fluids (with a density of up to 1.8-2.3g/cm ³). After injection into the wellbore, it can balance formation pressure, prevent blowouts, lost circulation, and wellbore collapse, and is particularly suitable for high-pressure oil and gas wells, deep wells, and ultra deep wells.
2. Additional key roles
      Anti pollution: resistant to salt and calcium pollution, strong stability in saline and complex mineralized formations, and does not affect the rheological properties of drilling fluids;
      Protecting oil and gas reservoirs: without solid phase characteristics, it will not block the pores of oil and gas reservoirs, reduce damage to oil and gas reservoirs, and improve oil and gas recovery rate;
      Good compatibility: It can be compounded with zinc bromide and sodium bromide to adjust different density requirements and meet different well conditions.
3. Adaptation scenarios: high-pressure oil and gas wells, offshore drilling, shale gas drilling, completion operations, and well repair operations.
2、 Core application scenario 2: Pharmaceutical field (pharmaceutical grade exclusive, clinical essential)
      Medicinal calcium bromide is a colorless and transparent injection solution that focuses on dual effects of central sedation and calcium supplementation, and must strictly comply with pharmacopoeia standards
1. Core function 1: Sedation of the central nervous system
      Bromine ions can act on the cerebral cortex, inhibit central nervous system excitability, and have sedative, sedative, and anticonvulsant effects. They are clinically used to treat neurasthenia, insomnia, anxiety disorders, and can also assist in the treatment of spastic diseases such as epilepsy and hand and foot convulsions.
2. Core function 2: Supplement calcium and maintain electrolyte balance in the body
      Calcium ions can participate in bone formation, muscle contraction, and nerve conduction. Medicinal calcium bromide can be used to prevent and treat calcium deficiency disorders (such as osteoporosis and rickets), and can also assist in relieving allergic reactions, inflammation, and edema.
3. Additional advantages: Good water solubility, fast absorption after injection, rapid onset of action, minimal vascular irritation, and high safety.
3、 Core application scenario 3: Refrigeration industry (industrial auxiliary, efficient cooling load)
      Calcium bromide is an environmentally friendly refrigerant core material, suitable for medium and low temperature refrigeration scenarios
1. Core function: Preparation of efficient refrigerant carrier
      Calcium bromide aqueous solution has a low freezing point (about -40 ℃ at a concentration of about 40%), high specific heat capacity, good thermal conductivity, and is non corrosive, non flammable, and non explosive. It can be used as a refrigerant to transfer cold in refrigeration systems, replacing some fluorine-containing refrigerants and being more environmentally friendly.
2. Adaptation scenarios: central air conditioning chillers, cold storage refrigeration, industrial low-temperature processes (such as chemical low-temperature reactions, food freezing).
3. Additional function: It can be compounded with lithium bromide to improve the low-temperature stability and thermal conductivity of the refrigerant, and is suitable for lower temperature requirements (below -50 ℃).
4、 Core application scenario 4: Chemical industry (raw material intermediates, multi-purpose extensions)
Calcium bromide, as a source of bromine and calcium, is a key intermediate in various chemical products
1. Bromine source raw materials: used to prepare other bromides (such as sodium bromide, potassium bromide, zinc bromide), and can also be used as brominating agents in organic synthesis, participating in the synthesis of pharmaceutical and pesticide intermediates.
2. Calcium source assistance: used in the electroplating industry as an additive in electroplating solutions to enhance the glossiness and adhesion of coatings, suitable for metal surface treatment; It can also be used in the printing and dyeing industry as a fixing agent to enhance the color fastness of dyes and prevent color fading.
3. Catalyst assistance: Used as a co catalyst in some organic chemical reactions to enhance reaction rate and conversion rate.
5、 Auxiliary application scenarios (niche but essential)
In the field of environmental protection, as a wastewater treatment agent, it can remove sulfate and fluoride ions from wastewater, generate insoluble calcium sulfate and calcium fluoride precipitates, and meet discharge standards; It can also be used for flue gas desulfurization to assist in the removal of sulfur dioxide.
In the field of building materials, it is added to concrete and mortar as an early strength agent to accelerate cement hydration reaction, enhance early strength of building materials, and shorten curing time; At the same time, it can improve the frost resistance of building materials and adapt to low-temperature construction environments.
Food field (little amount): Food grade calcium bromide can be used as a calcium fortifier and added to health foods and infant complementary foods to supplement calcium (in accordance with the national standard for food additives, with strict dosage control).
6、 Core features support corresponding functions (why can these functions be achieved)
Highly soluble in water: It is easily soluble in water and its solubility increases with temperature, making it convenient to prepare solutions of different concentrations and suitable for liquid applications such as drilling fluids, refrigerants, and injections;
Chemical stability: not easily decomposed at room temperature, good temperature resistance (non-volatile at high temperatures), suitable for extreme working conditions such as underground high temperature and refrigeration low temperature;
Non explosive: Belongs to non flammable and non explosive materials, safe storage and transportation, suitable for large-scale industrial use;
Bromine ion+calcium ion dual activity: Both ions exert corresponding effects, achieving "one material, multiple uses".
7、 Key precautions (industrial/pharmaceutical core taboos)
Medicinal grade: Purity must be strictly controlled, and it is prohibited to use it together with cardiac glycoside drugs (calcium ions can enhance cardiac glycoside toxicity). Patients with renal insufficiency should use it with caution;
Industrial grade: Calcium bromide used for drilling needs to control the content of impurities such as chloride ions and sulfate ions to avoid affecting the performance of drilling fluids;
Storage: Sealed and dry storage is required to prevent moisture absorption and agglomeration (calcium bromide is prone to deliquescence).

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