High-purity oxygen
Editor
Table of Contents
Physical Properties
2 Chemical Properties
Method of Preparation and Applications
4 Oxygen Purity
5 Important 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 formed through these reactions (comprising two elements, one of which is oxygen) are known as oxides. Generally, the aqueous solutions of non-metal oxides are acidic, while the oxides of alkali or alkaline earth metals are basic. Moreover, almost all organic compounds can combust vigorously in oxygen to produce carbon dioxide and water. In chemistry, the chemical reaction between a substance and oxygen was defined as an oxidation reaction, and redox reactions refer to reactions involving electron transfer or shift. [1]
Method of Preparation and Applications
Method of manufacture
Most oxygen is produced through air separation, which involves liquefying air and then purifying it through distillation. The low-temperature full distillation method can also be employed. 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 a reagent for producing 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 flame-supporting 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 cheaper 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
Volume fraction of Nitrogen (N2) / 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 in the table are expressed as volume/volume percentages (V/V).
5 Precautions to Note
1) Carefully inspect the spherical part of the cylinder's shoulder for markings before use. Pay special attention to the "Next Pressure Test Date." And conduct technical inspections of the cylinder regularly as required. Do not use cylinders past their inspection due date.
2) When in use, first conduct an external inspection, focusing on the bottle valve, pipe threads, and pressure reducer. If leaks, loose threads, inoperative gauge movement, or "climbing" are detected, repair them promptly and avoid casual handling. Do not tighten valve rods under pressure or adjust packing materials. Use soap and water to check for leaks; do not use open flames. When gas cylinders and electric welding are used in the same area, place an insulating material under the cylinder bottom to prevent the cylinder from becoming electrified. Pipes and equipment that come into contact with the gas cylinder must have grounding devices to prevent combustion or explosion due to static electricity. In winter, if using electric batteries, the bottle valve or pressure reducer may frost over, and can be defrosted using hot water or steam. Absolutely do not use fire to bake or use metal tools to strike the bottle valve, and do not forcefully tighten the pressure reducer's adjustment screw to prevent a large gas release and accidents.
3) During the use and storage of high-purity oxygen cylinders, avoid剧烈震动 and impacts. Handle the cylinders with gentle lifting and lowering, and use only specialized lifting frames or small carts. Prohibit the use of steel cables for hoisting oxygen cylinders directly. When in use and storage, secure the cylinders with railing or brackets to prevent tipping.
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 to direct sunlight during summer use.
5) When opening the bottle valve or reducer, move slowly to prevent static spark discharges from high-speed gas streams, collisions of solid particles, frictional heat, and heat released when gas is suddenly compressed (adiabatic compression), which may cause the oxygen cylinder and reducer to explode and catch fire.
Product Brand: Nianlong
Packaging: Steel Cylinder
Spec: 40L
Material: Genuine