High-purity oxygen
Editor
Table of Contents
1. Physical Properties
2 Chemical Properties
Method of Production and Applications
4 Oxygen Purity
5 Key Points
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, and these reactions are called oxidation reactions. The compounds produced by these reactions (comprising two elements, one of which is oxygen) are called oxides. Generally, 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 burn vigorously in oxygen to produce carbon dioxide and water. Chemically, the reaction of substances with oxygen is defined as an oxidation reaction, while redox reactions refer to reactions involving electron transfer or shift. [1]
Method of Preparation and Applications
Method of Manufacture
Most oxygen products are manufactured through air separation. The process involves liquefying air and then purifying it through distillation. The low-temperature full distillation method can also be used. Other purification methods include pressure swing adsorption and membrane separation. [2]
Applied
High-purity oxygen is used in chemical vapor deposition of silicon dioxide; as an oxidizing agent to produce high-purity water; dry oxidation; and mixed with carbon tetrafluoride for plasma etching. The main applications of oxygen are derived from its ability to sustain life and its combustion-supporting properties; it is widely used in the metallurgical industry. It can also be used in water treatment. All oxidation reactions and combustion processes require oxygen, such as removing sulfur and phosphorus impurities during steelmaking, where oxygen and acetylene mixtures burn at temperatures as high as 3500°C, used for welding and cutting steel. Oxygen is also necessary for glass manufacturing, cement production, mineral roasting, and hydrocarbon processing. Liquid oxygen is also used as rocket fuel, being cheaper than other fuels. [2]
4 Oxygen Purity Editing
Pure Oxygen, High Purity Oxygen, Ultra Pure Oxygen (GB/T14599-2008)
Project Name: Specification
Ultra-pure Oxygen, High-purity Oxygen, Pure Oxygen
Volume fraction of hydrogen (H2): ≤ 0.1, 0.5, 1
Argon (Ar) volume fraction/10 ≤ 0.2 2 10
Nitrogen (N2) volume fraction/10 ≤ 0.1 5 20
Total Hydrocarbon Content (by 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 concentration are expressed as volume/volume percentages (V/V).
5 Precautions to Note
1) Carefully inspect the spherical part 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 beyond the due inspection period.
2) When in use, perform an external inspection first, focusing on the bottle valve, pipe threads, and pressure reducers. If leaks, loose connections, sluggish gauge movement, or "crawling" are detected, repair promptly and avoid casual handling. Prohibit tightening valve stems under pressure or adjusting packing material. Use soap water to check for leaks, never use open flame. When using gas cylinders and electric welding in the same area, place insulating material under the cylinder bottom to prevent the cylinder from becoming electrically charged. Pipes and equipment that come into contact with the cylinder must be grounded to prevent fire or explosion due to static electricity generation. During winter use of electric batteries, the cylinder valve or reducer may frost over; thaw with hot water or steam, never use fire to bake or hammer on the valve with metal tools, and do not turn the reducer's adjustment screw too forcefully to prevent a large gas discharge and accidents.
3) During the use and storage of high-purity oxygen cylinders, avoid severe vibrations and impacts. Handle the cylinders with care, lifting and lowering them gently, and use only designated lifting frames or small carts. Prohibit the use of steel wire ropes for hoisting oxygen cylinders directly. When in use and storage, secure the cylinders with railing 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 [more than 10 meters (m) away]. Do not expose them to direct sunlight during summer use.
5) When opening the bottle valve or pressure reducer, move slowly to prevent static spark discharges from high-speed gas streams, collision heat and friction heat from solid particles, and heat released during sudden compression of the gas (adiabatic compression) from causing an explosion and fire in the oxygen cylinder and pressure reducer.
Product Brand: Nianlong
Packaging: Steel Cylinder
Size: 40L
Material: Genuine