Product Introduction:

Liquid oxygen, or liquid oxygen gas, is a widely used gas. As an important industrial gas, liquid oxygen finds extensive applications in numerous fields, including steelmaking, chemical engineering, electronics, and healthcare. Liquid oxygen is produced by compressing and cooling gaseous oxygen; its storage and use require specialized equipment and facilities.

Physical properties:

Oxygen is a colorless, odorless gas. Its melting point is −218.4°C, and its boiling point is −183°C. It is only slightly soluble in water. At room temperature, it is relatively unreactive; however, at high temperatures, it becomes highly reactive and can directly combine with a wide variety of elements. Liquid oxygen appears pale blue, and due to its cryogenic properties, it can render any material it comes into contact with extremely brittle. Liquid oxygen is also a powerful oxidizing agent—organic materials can burn vigorously in liquid oxygen. Some substances may even explode if immersed in liquid oxygen for an extended period.

Chemical properties:

The chemical properties of liquid oxygen are primarily characterized by its strong oxidizing power, which enables it to undergo oxidation reactions with numerous substances. Specifically, liquid oxygen can react with metals to form metal oxides; it can also react with nonmetals to produce nonmetal oxides; moreover, liquid oxygen can react with organic compounds to generate carbon dioxide and water. These reactions highlight the crucial role of liquid oxygen in chemical reactions and its wide range of applications.

Application areas:

01 Liquid Oxygen Applications in the Aerospace Field

Liquid oxygen serves as a propellant for rocket engines and is an indispensable and vital component of modern aerospace endeavors. Not only does liquid oxygen boast a high storage density, but the oxygen it releases after combustion also provides the oxygen source necessary for astronauts’ survival. In addition, liquid oxygen can be used in propellants, attitude control systems, and maneuvering systems.

02 Applications of Liquid Oxygen in the Chemical Industry

In the chemical industry, liquid oxygen is commonly used as an oxidizing agent—for example, in the desulfurization process during oil refining. By employing liquid oxygen as an oxidant, sulfur content can be reduced, thereby minimizing atmospheric pollution. In addition, liquid oxygen is widely utilized as an oxidizing agent or oxygen source in industries such as rubber, plastics, and coatings.

03 Applications of Liquid Oxygen in the Medical Field

Liquid oxygen is primarily used in the medical field for medical oxygen generation, where nitrogen is separated from air to supply the oxygen required by the body. Liquid oxygen oxygen generators are widely employed in hospitals, ambulances, nursing stations, and other such institutions. In the treatment of respiratory diseases, liquid oxygen oxygen generators also play a crucial role.

04 Applications of Liquid Oxygen in Environmental Protection

Liquid oxygen is being used more and more extensively in the field of environmental protection. For example, in exhaust gas treatment systems, liquid oxygen not only provides oxygen to promote the oxidative decomposition of harmful components in the exhaust gas, but also works synergistically with NOx reductants to jointly reduce NOx emission concentrations.

In short, liquid oxygen has extensive applications across many fields—from aerospace and chemical engineering to healthcare and environmental protection—none of which can do without this vital substance.

Precautions for Use:

1. Operate in a closed system and ensure adequate natural ventilation.

2. Operators must strictly adhere to operating procedures to prevent gas from leaking into the air in the workplace.

3. Equip with leak emergency response equipment. High‑pressure gas cylinders used for storing gases shall be operated in accordance with applicable regulations.

4. Bottled gas products must be stored, transported, and used in a categorized manner. Flammable gases must never be stored together with oxidizing gases, and they must be kept away from open flames and heat sources. Avoid exposure to fire, oil, or wax; do not expose them to direct sunlight, drop them forcefully, or subject them to impact. It is strictly prohibited to strike an arc or use electric arcs on the surface of gas cylinders, and rough handling during loading and unloading is strictly forbidden.