Ultrapure ammonia
First, product introduction
High purity ammonia is a colorless, toxic, alkaline, corrosive, combustible gas with irritating odor and high concentration of eye, skin, and mucous membrane
It's exciting. The density of ammonia is smaller than that of air. The density of the ammonia is 0.781g/L under the standard condition. It is easily dissolved in water and easily liquefy into a colorless liquid ammonia.
Chinese Name: ammonia
Molecular formula: NH3
English Name: Ammonia
Relative molecular weight: 17.03
CAS No:7664-41-7
Risk category: category 2.3
UN No:1005
Solubility: dissolved in water, ethanol and ether
Melting point (101.325kPa):-77.7 C
Boiling point (101.325kPa):-33.4 C
Critical temperature: 132.4 degrees centigrade
Liquid density (-73.15, 8.666kPa):729kg/m3
Critical pressure: 11.27MPa
Relative density (gas, air =1):0.597
Combustible range in air (20 C, 101.325kPa):15% ~ 27%
Combustible range in oxygen (20 C, 101.325kPa):14% ~ 79%
Two. Technical indicators
Inspection project
index
Ammonia (v/v)% >
Ninety-nine point nine nine nine nine nine
N = ppmv
Zero point zero one
Oxygen argon ppmv
Zero point zero one
Carbon monoxide is less than or equal to ppmv
Zero point zero one
Carbon dioxide is less than or equal to ppmv
Zero point zero one
Hydrogen is less than or equal to ppmv
Zero point zero one
Hydrocarbon (C1-C3) ppmv
Zero point zero one
The water is less than ppmv
Zero Point Zero Five
The total impurity content less than ppmv
Zero point one
Three, packing specification (steel bottle, Y bottle, T bottle, liquid ammonia tank)
Volume (liter)
Forty-seven
Four hundred and forty
Nine hundred and thirty
Tank
Filling quantity (kilogram)
Twenty-two
Two hundred and thirty
Four hundred and eighty
Twelve thousand
Valve model
CGA660
DISS720
DISS720
ACME thread interface
* other specifications can be provided in accordance with customer requirements.
Four, the application of super pure ammonia
Ultra pure ammonia is mainly used in the field of new optoelectronic materials. It is an important basic material for the preparation of GAN by MOCVD technology. High sensitivity produced by GAN
Blue light emitting two and blue light lasers, as well as other related electronic devices. Super pure ammonia or the base material for the preparation of three fluorinated nitrogen and silicon nitride.
It is the raw gas for the production of super high nitrogen. In addition, the liquid ammonia is widely used in the semiconductor industry, the metallurgical industry, and the other needs to protect the atmosphere.
In industrial and scientific research.
Five. Precautions
High purity ammonia is a highly corrosive toxic substance, which has a strong corrosive effect on the skin and eyes and produces severe painful burns. High pure ammonia vapour
Stimulate the mucous membrane and eyes of the respiratory tract and asphyxiate the breathing. The skin damaged by high pure ammonia should be rinsed with water immediately, and then 3% ~ 5% of the boric acid,
Wet compress of acetic acid or citric acid solution. The doctor should be treated immediately when it is serious.
High pure ammonia inhalation of the human body, a small part of the carbon dioxide neutralization, the rest of the blood into the blood, mainly with hemoglobin, destruction of blood oxygen
Function. Short term inhalation of ammonia will appear after the tears, sore throat, cough, chest tightness, dyspnea, dizziness, vomiting, fatigue etc.. If inhaled
High ammonia is too high, causing excessive concentration of ammonia in the blood, which will cause cardiac arrest and respiratory arrest through the reflex action of the trigeminal nerve endings.
And life.
Before using high pure ammonia gas, nitrogen test pressure, helium gas pressure protection and soapy water leak test should be carried out to ammonia pipeline to ensure that the ammonia pipeline is not leaked. work environment
Keep ventilation. 2 people need to be operated at the same time to cope with the sudden situation. There is the test time of the cylinder on the bottle neck of the ammonia gas cylinder, and the cylinder should be entrusted to the cylinder which is not in conformity with the requirements.
Ferrill special gas supplier to the pressure vessel inspection unit qualification test. The use of overdue steel bottles is strictly prohibited.
The cylinder or tank car filled with liquid ammonia should be in conformity with the "safety supervision regulations for gas cylinders" issued by the State Labor Bureau and the "safety supervision regulations of pressure vessels".
Regulations。 The filling coefficient of liquid ammonia is 0.52kg/L. The cylinders and tankers carrying liquid ammonia must comply with the "dangerous goods" made by the Ministry of communications of the People's Republic of China.
In the course of transportation, heat should be avoided and fireworks are strictly prohibited during transportation. The cylinder must have safety cap, bottle external rubber ring or rope dressing, prevent fierce impact and
Vibrate. High purity ammonia cylinders should be deposited on a storeroom or a platform with a shed. It should be covered with tents to prevent direct sunlight when stacking in the open air. Mainly by dangerous goods
Transport vehicles. A steel bottle special handcart should be used when moving the cylinder in a short distance.
