High-purity Oxygen
Editor
Table of Contents
Physical Properties
2 Chemical Properties
Method of Preparation and Applications
4 Oxygen Purity
5 Important Notes
1 Physical Properties Edit
high purity oxygen
Molecular Formula: O2
Dust (φ≥0.5μm) ≤ 3.5 particles/L, impurity content N2 ≤ 10 cm3/m3, Ar ≤ 5 cm3/m3, H2O ≤ 1 cm3/m3, CO2 ≤ 0.5 cm3/m3. Colorless, odorless, tasteless gas. Oxygen is non-flammable but supports combustion. Relative density ds (21.1°C, air = 1) 1.105. Gas density 1.326 kg/m3 (21.1°C, 101.3 kPa); liquid density 1141 kg/m3 (-182.96°C). Boiling point -182.96°C. Melting point -218.78°C. [1]
2 Chemical Properties Edit
Ring-shaped and chain-shaped structural elements can react with oxygen, these reactions are called oxidation reactions, and the compounds produced by these reactions (comprising two elements, one of which is oxygen) are called oxides. Generally speaking, the aqueous solutions of non-metal oxides are acidic, while the oxides of alkali or alkaline earth metals are alkaline. Additionally, almost all organic compounds can combust vigorously in oxygen to produce carbon dioxide and water. Chemically, the reaction of substances with oxygen has been defined as an oxidation reaction, and redox reactions refer to reactions involving the transfer or shift of electrons. [1]
Method of Preparation and Applications
Method of manufacture
Most oxygen is produced from air separation. The air is first liquefied and then purified through distillation. The cryogenic complete distillation method can also be used. Other purification methods include pressure swing adsorption and membrane separation. [2]
Application
High-purity oxygen is used in chemical vapor deposition of silicon dioxide; as a reagent for generating high-purity water; dry oxidation; and mixed with carbon tetrafluoride for plasma etching. The primary uses of oxygen are derived from its ability to sustain life and its flammable properties; it is widely used in the metallurgical industry. It can also be used for water treatment. All oxidation reactions and combustion processes require oxygen, such as removing sulfur and phosphorus impurities during steelmaking, where a mixture of oxygen and acetylene burns at temperatures up to 3500°C, used for welding and cutting steel. Oxygen is needed in glass manufacturing, cement production, mineral roasting, and hydrocarbon processing. Liquid oxygen is also used as rocket fuel, being more cost-effective than other fuels. [2]
4 Oxygen Purity Edit
Pure Oxygen, High Purity Oxygen, Ultra Pure Oxygen (GB/T14599-2008)
Project Name Specifications
Ultra-pure Oxygen, High-purity Oxygen, Pure Oxygen
Hydrogen (H2) volume fraction/10 ≤ 0.1 0.5 1
Argon (Ar) volume fraction/10 ≤ 0.2
Nitrogen (N2) volume fraction/10 ≤ 0.1 5 20
Total Hydrocarbon Content (based on methane) /10 ≤ 0.1 0.5 2
Carbon Dioxide Content/10 ≤ 0.1 0.5 1
Moisture/10 ≤ 0.5 2 3
Note: Purity and content are expressed as volume fractions (V/V) in the table.
5 Precautions to Note
1) Carefully inspect the spherical portion of the cylinder shoulder for markings before use. Pay special attention to the "Next Pressure Test Date." And conduct technical inspections of the cylinder regularly as required during use. Do not use cylinders past the due inspection date.
2) When in use, first conduct an external inspection, focusing on the bottle valve, pipe threads, and pressure reducer. If leaks, loose fittings, inoperative gauge pointer, or "climbing" are found, repair them promptly and avoid any casual handling. Prohibit tightening valve rods under pressure or adjusting packing materials. Use soap and water to check for leaks; avoid using open flames. When gas cylinders and electric welding are used in the same area, place an insulating material under the cylinder base to prevent the cylinder from becoming electrified. Pipes and equipment that come into contact with the gas cylinder should have grounding devices to prevent combustion or explosion due to static electricity. In winter, when using electric batteries, the bottle valve or pressure reducer may frost over, and should be thawed with hot water or steam; absolutely do not use fire to bake or use metal tools to strike the valve, nor should you拧 the pressure reducer's adjustment screw too forcefully to prevent a large gas discharge and potential accidents.
3) During the use and storage of high-purity oxygen cylinders, avoid severe vibrations and impacts. Handle the cylinders with gentle lifting and lowering, and use only specialized lifting frames or small carts. Prohibit the use of steel wire ropes for lifting oxygen cylinders directly. When in use and storage, secure the cylinders with railings or brackets to prevent them from toppling over.
4) Oxygen cylinders should be kept away from high temperatures, open flames, and splashes of molten metal [at least 10 meters (m) away]. Do not expose them to direct sunlight during summer use.
5) Slowly operate the bottle valve or pressure reducer to prevent the discharge of static sparks from high-speed gas flow, collision heat and frictional heat from solid particles, and heat released during sudden compression of the gas (adiabatic compression), which could cause an explosion and fire in the oxygen cylinder and pressure reducer.
Product Brand: Nianlong
Packaging: Steel Cylinder
Specification: 40L
Material: Genuine