When it comes to helium, industry insiders often use professional terms such as pure helium, high-purity helium, and ultra pure helium.
So what is ultra pure helium? Firstly, I would like to share with you the knowledge of pure helium, high-purity helium, and ultra pure helium. The following are the technical specifications of the national standard helium.
Ultra pure helium is actually helium gas with a purity of 99.9999%. So what are the methods for preparing ultra pure helium?
Mainly as follows:
1. Natural gas separation method: This is a commonly used industrial method that uses helium natural gas as raw material, repeatedly liquefies and fractionates it, and then uses activated carbon adsorption purification to finally obtain ultra pure helium.
2. Synthetic ammonia method: During the process of synthesizing ammonia, ultra pure helium can be separated and purified from the exhaust gas.
3. Air fractionation: Extracting ultra pure helium from neon helium mixture by fractional distillation from liquid air.
What are the specific uses of ultra pure helium?
1. Ultra low temperature research: Due to the extremely low boiling point of helium, it is commonly used to achieve ultra-low temperature environments close to absolute zero.
2. Gas phase analysis: used as a carrier gas or auxiliary gas for gas chromatography analysis.
3. Welding and leak detection: used for high-precision welding and leak detection in the electronics and metal processing industries.
4. Chemical vapor deposition and crystal growth: Used for material deposition and crystal growth in semiconductor manufacturing processes.
5. Plasma dry etching: used for plasma assisted dry etching process.
6. Special mixture: mixed with other gases for specific industrial applications.
7. Medical and scientific research: used as a cooling agent and other medical imaging equipment in MRI (magnetic resonance imaging), or as a standard gas and equilibrium gas in scientific research.
8. Inflatable applications: used for inflating balloons, electronic tubes, diving suits, etc.
Air Separation Plant/Nitrous oxide plant/CO2 recovery plant/Hydrogen plant/Acetylene Plant/Mobile Tank/ISO Tank Container/Cryogenic Storage Tank/LPG Storage Tank/Cryogenic Pump/Micro Bulk Tank Solutions/Cryogenic Semi Trailer Transport Tanker/LPG Semi Trailer Tanker/Dewar Flask/Vaporizer/Cylinders/Dry ice making machine/Calcium Carbide