Antimony Trioxide ATO

Antimony trioxide (ATO), with the chemical formula Sb2O3, is an important inorganic compound. It appears as a white crystalline powder under normal conditions, odorless and non-toxic, with relatively stable chemical properties. It has two crystal forms, cubic and rhombohedral, corresponding to antimonite and antimonite in nature. The density of the cubic crystal form reaches 5.2g/cm ³. When heated to 550-577 ℃, it undergoes a crystal transformation and becomes a rhombohedral crystal. At this point, the density becomes 5.67g/cm ³, the melting point is 656 ℃, and the boiling point is as high as 1425 ℃. It has the characteristics of amphoteric oxides, slightly stronger alkalinity than arsenic trioxide, difficult to dissolve in water, alcohol, dilute sulfuric acid, dilute nitric acid, but soluble in concentrated hydrochloric acid, concentrated sulfuric acid, concentrated nitric acid, concentrated sodium hydroxide solution, sodium sulfide solution, and tartaric acid solution. With good flame retardancy, catalytic properties, etc., it plays a key role in many fields.

The antimony trioxide ATO antimony trioxide flame retardant is an added flame retardant, antimony trioxide ATO flame retardantin the early stage of combustion, the first is melting, forming a protective film on the surface of the material to isolate the air, through the internal endothermic reaction, reduce the combustion temperature. At high temperatures, antimony trioxide ATO is vaporized, diluting the oxygen concentration in the air and thus playing a flame retardant role.

Physical and Chemical Properties

Product Introduction:

1. Chemical properties: Antimony trioxide (ATO) exhibits significant characteristics in chemical reactions. In an acidic environment, it will undergo a neutralization reaction with acid to form antimony salts, such as reacting with sulfuric acid to produce antimony sulfate. It has oxidizing properties and reacts with hydrogen sulfide to produce orange antimony trisulfide. During the flame retardant process, in the early stages of combustion, ATO will first melt and quickly form a dense protective film on the surface of the material, effectively isolating air; Meanwhile, the endothermic reaction occurring internally can lower the combustion temperature. At high temperatures, ATO is vaporized, which can dilute the oxygen concentration in the air and achieve flame retardancy.

2. Physical properties: The appearance of white crystalline powder ensures that it does not interfere with the color of the product during application. When heated, it turns yellow and returns to white after cooling. Uniform particle size, after special processing, the average particle size can reach an extremely fine level, ensuring that it can be uniformly dispersed in various materials and fully exert its performance. In addition, when heated to 400 ℃ in a high vacuum environment, ATO can sublime, which has important applications in some special processes.

3. Technical specifications: High quality antimony trioxide (ATO) typically has a purity of over 99%, ensuring stable and reliable performance. The whiteness is generally ≥ 85, which meets most application scenarios that require appearance and color. The particle size can be customized according to customer needs, and the common average particle size can be controlled within 1-5 μ m to meet the processing requirements of different materials. Heating loss (105 ℃, 2h) ≤ 0.1%, ensuring that product quality is not significantly affected by temperature and time changes under normal storage and use conditions.

Application areas:

1. Flame retardant field: As an additive flame retardant, ATO is often used in conjunction with other flame retardants and smoke suppressants, and the synergistic effect can greatly enhance the flame retardant effect. In the plastic industry, it is widely used in plastics such as epoxy resin, polyurethane, polystyrene, polyvinyl chloride, polyester, etc., such as plastic shells of electronic products, insulation layers of wires and cables, effectively improving the flame retardant level of plastics and reducing the risk of fire. In the rubber industry, it is used for rubber products such as conveyor belts and cables. It not only plays a filling role, but also enhances the flame retardant properties of rubber, ensuring the safe use of rubber products in complex environments. In the textile industry, it is applied to fire-resistant fabrics, such as firefighter protective clothing, public place curtains, etc., to provide protection for the safety of life and property.

2. Catalytic field: In the production of polyester (PET), ATO is a key catalyst for synthesizing polyethylene terephthalate, which can promote the condensation reaction of phthalic anhydride and ethylene glycol, increase molecular weight, optimize the mechanical strength and thermal stability of the material. In the ammonia oxidation reaction of acrylonitrile and benzonitrile synthesis, as a selective catalyst, propylene can be converted to acrylonitrile or toluene can be converted to benzonitrile, significantly reducing the generation of by-products. In the contact method sulfuric acid production process, as an auxiliary component of vanadium catalyst, the conversion efficiency of sulfur dioxide oxidation to sulfur trioxide can be optimized, the reaction temperature can be reduced, and the catalyst life can be extended.

Packaging : Net weight 25kg/bag, Compound paper-plastic bag

Storage and Attention : Keep in dry, room temperature and moisture proof condition, preventing the heating.

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