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, and 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 through these reactions (comprising two elements, one of which is oxygen) are referred to as oxides. Generally, the aqueous solutions of non-metal oxides are acidic, while oxides of alkali or alkaline earth metals are basic. Moreover, almost all organic compounds can burn vigorously in oxygen, producing carbon dioxide and water. Chemically, the reaction of substances with oxygen is defined as an oxidation reaction, and oxidation-reduction reactions involve the transfer or shift of electrons. [1]
Method of Preparation and Application
Method of Production
Most oxygen products are manufactured through air separation. The process involves liquefying air and then purifying it through fractional distillation. The low-temperature fractional 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 combustion-enhancing 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 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 Editing
Pure Oxygen, High Purity Oxygen, Ultra Pure Oxygen (GB/T14599-2008)
Project Name: Specification
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 2 10
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 concentration are expressed as volume/volume percentages (V/V).
5 Points to Note
1) Prior to use, carefully inspect the spherical portion of the cylinder shoulder for markings. 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 their scheduled inspection period.
2) Upon use, perform an external inspection first, focusing on the bottle valve, pipe threads, and pressure regulators. If leaks, loose fittings, erratic gauge movement, or "climbing" are detected, repair should be immediate; do not attempt casual fixes. Prohibit tightening valve stems under pressure or adjusting packing material. Use soap and water to check for leaks, and avoid open flames. When using gas cylinders alongside electric welding in the same area, place insulating material under the cylinder bottom to prevent the cylinder from becoming electrified. Pipeline and equipment in contact with the gas cylinder must be grounded to prevent fire or explosion due to static buildup. In winter, if using electric batteries, the bottle valve or pressure regulator may frost over; thaw using hot water or steam. Absolutely avoid using fire to heat or using metal tools on the bottle valve. Also, do not forcibly tighten the pressure regulator's adjustment screw to prevent a large gas release that could cause an accident.
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. Direct hoisting with wire ropes is prohibited. 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 metals [at least 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 the discharge of static sparks from high-speed gas flow, collision heat and friction heat from solid particles, and heat released when the gas is suddenly compressed (adiabatic compression), which could cause the oxygen cylinder and pressure reducer to explode and catch fire.
Product Brand: Nianlong
Packaging: Steel Cylinder
Specification: 40L
Material: Genuine