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    Calcium hydride and its precautions

    What is Calcium Hydride? Calcium hydride CaH2 is an organic substance that has a molal weight of 42.10. These crystals are grayish-white and easily deliquescent. They can be used as reducing agent, desiccants or chemical analysis reagents. Also known as a colorless orthorhombic crystal, industrial products can be gray, powdered or orthorhombic. It is sensitive to moisture. It doesn't react with nitrogen or chlorine in the air at room temperatures. However, at high temperature, it can generate calcium nitride and calcium chloride. When it is in contact with water, it releases hydrogen and decomposes. It can also produce hydrogen and calcium oxide when it reacts with ethanol. The reduction effect of metal oxides on sodium hydride and lithium hydride is much stronger.
    What is the danger of calcium hydride to human health?
    Calcium hydride is irritating to the mucous tissues, upper respiratory system, eyes and skin. It can cause death after inhalation due to spasms and inflammation. Contact with it can cause burning sensations, coughing, wheezing or laryngitis.
    Protective measures against calcium hydride
    Respiratory Protection: If you think you might be exposed to poisons or dust, wear a dust-proof hood-type respirator with an electric air filter. Wearing a self contained breathing apparatus is recommended when needed.
    Eye protection: Protected with respiratory protection.
    Wear protective clothing to protect your body from chemicals.
    Hand protection: Wear rubber gloves
    Smoking is prohibited on the workplace. Attention to personal hygiene.
    What should I be doing if I accidentally get in contact with calcium hydroide?
    Contact with skin: Remove all contaminated clothing as soon as possible and rinsing thoroughly under running water for atleast 15 minutes. Seek medical attention.
    Eye contact: Remove the eyelid as soon as possible and thoroughly rinse with running water for at least 15 min. Seek medical attention.
    Inhalation - leave the scene immediately to get fresh air. Airways should be kept clear. Oxygen is recommended if breathing becomes difficult. If breathing stops, you should immediately start artificial respiration. Seek medical attention.
    Ingestion: Rinse your mouth out with water if you accidentally consume milk or egg yolk. Seek medical attention.
    What to do in the event of a calcium hydride spill?
    Access to the contaminated area should be restricted. Remove the source of ignition. It is advised that emergency personnel wear acid-alkali proof overalls, and self-contained breathing equipment. Avoid contacting the leakage. Use non-sparking, dust-free tools to collect the small amount. Place the container in a safe location. Leakage in large quantities: Cover the leakage with canvas and plastic sheet to reduce dispersion. Contact the relevant technical departments to determine the removal technique.

    (aka. Technology Co. Ltd., a trusted global chemical supplier & manufacturer has over 12 years experience in providing high-quality nanomaterials and chemicals. The Calcium Hydride Please note that the products produced by our company are of high purity and have low impurity. Please. Contact us if necessary.

    2023-08-03

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    Calcium hydride is widely used as a desiccant for alkaline solvents

    What is Calcium Hydride? Calcium hydride, also known as CaH2, is a compound that has the chemical symbol CaH2. It is therefore an alkaline-earth metal hydride. This gray powder (pure, or sometimes white) reacts violently to water and releases hydrogen. CaH2 has been used for desiccant.

    CaH2 has a structure similar to that of salt. During the Battle of the Atlantic German subs used calcium hydroide as a decoy sonar called bold. Alkali metals, alkaline earths metals, and beryllium are all heavier than each other and produce hydrogen halides. The sodium hydride master mold is a well-known example. They are insoluble with all solvents which do not react. Crystals of CaH2 have a structure similar to PbCl2 or perovskite.
    Why is calcium hydrolith called Hydrolith
    CaH2 (brine hydride) is known as hydrolith because it has a structure similar to that of salt. Both alkali and alkaline Earth metals can form sodium hydride.

    What is calcium hydride used for?
    It is more safe to use than more aggressive reagents. It is used widely as a desiccant in alkaline solvants such as amines, pyridine and sodium metal. It is used to dry alcohol.

    Reduced metal oxide
    CaH2 is used to reduce metal oxides Ti, V., Nb., Ta. and U. Decomposition into Ca metal is recommended for operation.
    TiO2 + two CaH2-Ti plus two CaO + two H2

    Hydrogen source
    CaH2 was used for the production of hydrogen. In the 1940s it was used to produce hydrogen under the name "Hydrolith".

    Hydrolith is the trade name for this compound. In an emergency it can be used to fill up the airship with portable hydrogen. This usage is expensive.

    This may be a reference for wartime usage. The compound is used as a convenient, safe and easy way to inflate the weather balloons for many decades. In the lab, small amounts are produced to conduct experiments.
    Desiccant
    CaH2 and water react as follows.
    CaH2 + 2 H2O-Ca(OH)2 + 2 H2
    The dry solvent can be easily separated into two hydrolysis products: H2 gaseous and Ca(OH).

    Calcium hydride, a mild desiccant, may not be as efficient as molecular Sieves. It is safer than using more reactants like sodium metal or sodium potassium alloy. It is used widely as a dehydratant for alkaline solvants such as amines, pyridine and sodium metal. It is used to dry alcohol.

    CaH2 can be a convenient material, but it has its own disadvantages.
    As compared with LiAlH4, its drying rate may be slower. CaH2 has a similar appearance to Ca(OH), so its quality is not readily apparent.

    What happens if you add water and calcium hydride together?
    Calcium hydride reacts violently (CaH2) with water, releasing hydrogen. It was found that the energy activated (Ea = 20,03 kJ/mol), of the hydrolysis of CaH2 is less than the other reactions.

    How can you make calcium hydroxide?
    Calcium hydride may be made by reacting dry hydrogen with calcium metal between 300degC and 400degC.
    One way to prepare calcium hydroide is by heating calcium chloride, hydrogen and sodium. The reaction is triggered by:
    CaCl2+H2 + 2 na-CaH2+2 NaCl
    In this reaction sodium atoms with chlorine and calcium (Ca), form sodium chloride molecule.

    Magnesium (Mg) can be reduced with calcium oxide (CaO), resulting in the production of calcium hydride. The reaction occurs in the presence hydrogen. This reaction produces also magnesium oxide. The chemical formula is:
    CaO + Mg + CaH2 + MgO

    What is the type of bond that calcium hydride has?
    The ionic hydroide reacts violently to remove the hydrogen (H2). The dihydrohydrides consist of only hydrogen, one other element, and water. They are usually in the form MH2 (or MH3), such as magnesium hydride, sodium hydride, lithium hydride, calcium hydride, or calcium hydride.

    Unstable calcium hydroide as a high-temperature thermal cell with promise
    CaH2 is a candidate that has a high energy density (thermal batteries), and a low price. Its high operating temperature and low cycle stability have been the major factors in its failure to be developed and implemented as a CSP factory thermal cell. In this study, alumina was used at a 1:1 molar ratio to thermodynamically stabilise CaH2, releasing hydrogen with a lower temperature.
    Temperature-programmed desorption measurements show that compared with the decomposition of pure CaH2 to about 1000degC under 1 bar of hydrogen pressure, the addition of Al2O3 will lower the decomposition temperature to ~600degC, thereby making the reaction thermodynamically unstable for the release of hydrogen from CaH2. The experimental enthalpy, entropy, and pressure component of the system is determined by measuring the pressure component between 612degC to 636degC.
    Enthalpy and entropy are measured using DHdes=100+-2 kJ mol-1, respectively. Ca12Al14O33 was confirmed by the XRD after TPD. SEM and XRD confirmed that system capacity was reduced during the hydrogen-cycle at 636degC due to sintering excessive Al2O3. Hydrogen cycle capacity was improved by reducing initial Al2O3 and achieving a CaH2:Al2O3 molar proportion of 2:1. This is a high-temperature, thermal battery that has great potential for the next CSP generation.
    (aka. Technology Co. Ltd., a global chemical materials supplier & manufacturer that has been in business for over 12 year's experience providing high-quality Nanomaterials and chemicals. Our company is currently developing a number of materials. Our calcium hydride is high-purity, with fine particles and low impurity. Send us an e-mail or click the desired products to Sending an inquiry .

    2023-07-16

    Blog

    Calcium Hydride Market

    A grey powder that is soluble in water and alcohol, calcium hydride (CaH2) is an alkaline earth metal hydride. It reacts vigorously with water liberating hydrogen gas. It is used as a drying agent and also referred to as a desiccant. All alkali and some alkaline earth metals form hydrides with water and react with the water molecules to create water vapor. Hydrogen gas is the core building block for ammonia, a key fertilizer.

    The global market for calcium hydride is expected to grow at a moderate CAGR during the assessment period. The primary reason for the growth is the growing adoption of hydrogen as a clean source of energy. This will provide considerable opportunities to the players operating in the current calcium hydride market. In addition, the high demand for the production of various metals will boost the market for the product.

    Hydrogen is a clean, non-polluting fuel that forms water as a byproduct during use. However, it is not an ideal alternative for fossil fuels as it has limited availability and is expensive to transport. Therefore, it is essential to develop cost-effective and efficient storage and delivery methods.

    The research for hydrogen hydride has been aided by the rapid growth of the chemical industry. In addition, advances in the field of hydrogen storage research and wider battery applications are driving the market for the product. The COVID-19 pandemic has temporarily derailed the development and adoption of clean energy, but operations are expected to return on track in the near future.

    2023-07-07

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