Ultrapure ammonia
Content introduction
1、 Product introduction
High purity ammonia is a colorless, toxic, alkaline, highly corrosive combustible gas with a pungent odor, and high concentration is harmful to eyes, skin and mucous membrane
It is stimulating. The density of ammonia is smaller than that of air, and the density under standard conditions is 0.781g/L, which is very soluble in water and easy to be liquefied into colorless liquid ammonia.
中文名：氨 | 分子式：NH3 |
英文名：Ammonia | 相对分子量：17.03 |
CAS No：7664-41-7 | 危险性类别：第2.3类 |
UN No：1005 | 溶解性：溶于水、乙醇、乙醚 |
熔点(101.325kPa)： -77.7℃ | 沸点(101.325kPa)： -33.4℃ |
临界温度： 132.4℃ | 液体密度(-73.15℃，8.666kPa)：729kg/m3 |
临界压力： 11.27MPa | 相对密度(气体，空气=1)：0.597 |
空气中可燃范围(20℃，101.325kPa)：15%～27% | |
氧气中可燃范围(20℃，101.325kPa)：14%～79% | |
2、 Technical indicators
Inspection items | index |
氨（v/v）% ≥ | 99.99999 |
氮 ppmv ≤ | 0.01 |
氧 氩 ppmv ≤ | 0.01 |
一氧化碳 ppmv ≤ | 0.01 |
二氧化碳 ppmv ≤ | 0.01 |
氢ppmv ≤ | 0.01 |
烃（C1-C3）ppmv ≤ | 0.01 |
水 ppmv ≤ | 0.05 |
总杂质含量ppmv ≤ | 0.1 |
3、 Packaging specification (steel cylinder, Y cylinder, T cylinder, liquid ammonia tank)
Volume (L) | 47 | 440 | 930 | Tank tank |
Filling capacity (kg) | 22 | 230 | 480 | 12000 |
Valve model | CGA660 | DISS720 | DISS720 | ACME threaded interface |
Other specifications can be provided according to customer requirements.
4、 Application of ultrapure ammonia
Ultra pure ammonia is mainly used in the field of new optoelectronic materials and is an important basic material for preparing GAN by MOCVD technology. High sensitivity produced by GAN
Blue light emitting diodes, blue light lasers, and other related electronic devices. Ultrapure ammonia is also the basic material for preparing nitrogen trifluoride and silicon nitride,
It is the feed gas for producing super nitrogen. In addition, liquid ammonia is widely used in semiconductor industry, metallurgical industry and other industries that need protective atmosphere
Industrial and scientific research.
5、 Precautions
High purity ammonia is a highly corrosive toxic substance, which has a strong corrosive effect on skin and eyes, causing severe painful burns. Strong high-purity ammonia vapor
Irritating the mucous membrane of respiratory tract and eyes, with asphyxiation effect on respiration. The skin damaged by high-purity ammonia should be immediately washed with water, and then treated with 3%~5% boric acid
Wet compress with acetic acid or citric acid solution. If it is serious, ask a doctor for treatment immediately.
High purity ammonia is inhaled into the human body, and a small part is neutralized by carbon dioxide. The rest enters the blood, mainly combines with hemoglobin, and destroys blood oxygen transport
Function. In a short time, after inhaling a large amount of ammonia, there will be tears, sore throat, cough, chest tightness, dyspnea, dizziness, vomiting, fatigue, etc. If inhaled
Too much high-purity ammonia will lead to high ammonia concentration in the blood, which will cause cardiac arrest and respiratory arrest through the reflex of trigeminal nerve endings
And life.
Before using high-purity ammonia, nitrogen pressure test, helium pressure holding and soapy water leakage test shall be carried out for ammonia pipeline to ensure no leakage of ammonia pipeline. work environment
Keep ventilation. Two people are required to operate at the same time to deal with emergencies. There is a cylinder inspection time on the bottle neck of the ammonia cylinder, and the unqualified cylinder shall be entrusted
Suppliers such as Philips special gas shall go to a qualified pressure vessel inspection unit for inspection. It is strictly prohibited to use expired cylinders.
The steel cylinder or tank car filled with liquid ammonia shall comply with the "Gas Cylinder Safety Supervision Regulation", "Pressure Vessel Safety Supervision Regulation" and other relevant regulations issued by the National Labor Bureau
regulations. The filling coefficient of liquid ammonia is 0.52kg/L. The steel cylinder and tank car used to transport liquid ammonia must comply with the "Transportation of Dangerous Goods" formulated by the Ministry of Communications of the People's Republic of China
Transportation rules, avoid heating during transportation, and prohibit fireworks. The steel cylinder must be equipped with a safety helmet, and the outside of the cylinder shall be wrapped with a rubber band or straw rope to prevent violent impact and
Vibration. The high-purity ammonia cylinder shall be stored in the warehouse or on the platform with shed. When stacking in the open air, it shall be covered with tents to prevent direct sunlight. Mainly dangerous goods
Transport by transport vehicle. The special trolley for steel cylinder shall be used when moving the steel cylinder in a short distance.
