Some Common Knowledge About High-Purity Acetylene

      High-purity acetylene is a colorless, highly flammable gas at room temperature. Its molecular formula is C2H2, and it is commonly known as "wind coal." It is one of the smallest acetylene hydrocarbons and is primarily used in industrial applications, especially for welding metals. Pure acetylene is odorless, but industrial-grade acetylene contains impurities such as hydrogen sulfide and phosphine, giving it a garlic-like odor.

　　High-purity acetylene is primarily used for lighting, welding, and cutting metals (using oxyacetylene flames). It also serves as a fundamental raw material for the production of acetaldehyde, acetic acid, benzene, synthetic rubber, synthetic fibers, and other chemicals. When acetylene burns, it produces extremely high temperatures—up to around 3,200 degrees Celsius in an oxyacetylene flame. This flame can be used for cutting and welding metals. With sufficient oxygen supply, acetylene burns completely, emitting a bright white light. As such, it can serve as a lighting source in places where electric lights are not common or where there is no access to electricity.

　　High-purity acetylene is typically dissolved in a solvent and encapsulated in a porous material before being placed into cylinders. It should be stored in a cool, well-ventilated area, away from ignition sources and heat sources. The storage temperature should not exceed 30°C, and the acetylene must be kept separate from oxidizers, acids, and halogens to prevent accidental mixing. Explosion-proof lighting and ventilation equipment must be used. The use of machinery and tools that easily generate sparks is strictly prohibited. The storage area must be equipped with emergency spill-response equipment.

　　Emergency Handling Measures for High-Purity Acetylene:

　　Inhalation of high-purity acetylene: Quickly leave the scene and breathe fresh air. Keep the airway open. If breathing becomes difficult, administer oxygen. If breathing stops, immediately perform artificial respiration and seek medical attention.

　　Respiratory Protection: Generally, no special protection is required; however, in special circumstances (when the oxygen content is the same as or close to that in the air), it is recommended to wear a suitable self-contained filtering gas mask.

　　Eye protection: Generally, no special protection is required; however, when handling high concentrations, chemical safety goggles may be worn.

　　Body protection: Wear antistatic work clothing.

　　Hand protection: Wear general work protective gloves.

　　Other precautions: Smoking is strictly prohibited at the work site. Avoid prolonged and repeated exposure. When working in storage tanks, confined spaces, or other areas with high concentrations of hazardous substances, ensure that there is a supervisor present.

　　Emergency Response for High-Purity Acetylene Leaks: Immediately evacuate personnel from the leak-contaminated area to upwind locations and establish a containment zone, strictly restricting access. Eliminate all ignition sources. Emergency responders are advised to wear self-contained positive-pressure breathing apparatus and anti-static work clothing. As much as possible, isolate and shut off the leak source. Ensure adequate ventilation to accelerate gas dispersion. Spray water to dilute and dissolve the leaked acetylene. Construct dikes or excavate pits to contain large volumes of wastewater. If feasible, use exhaust fans to direct the leaking gas to an open area, or install appropriate nozzles for controlled combustion. Before reuse, thoroughly handle, repair, and inspect any leaking containers.

　　Harmful combustion products of high-purity acetylene: 1. Carbon dioxide.

　　Fire-extinguishing methods for high-purity acetylene: Shut off the gas supply. If it is impossible to cut off the air supply, do not attempt to extinguish the flame at the leak site. Cool the container with water spray, and if possible, move the container away from the fire to an open area.

　　Fire extinguishing agents used for high-purity acetylene: misted water, foam, carbon dioxide, and dry powder.