Application of nitrogen in the petrochemical industry: Nitrogen is the main component of air. It is a colorless, odorless, non-toxic and non-flammable gas at room temperature and atmospheric pressure. The boiling point is -195.8 °C, and its chemical properties are inactive. In addition to synthetic ammonia, nitrogen is usually used as a protective gas for metallurgy, chemicals, coal, food, medicine, electronics, magnetic materials, transportation, heat treatment, tires, thermoelectricity, aviation and other industries. Petrochemicals is one of the largest and most used industries in nitrogen equipment. The current use of more: polyvinyl chloride(PVC), purity 99.5 %, large flow. Polypropylene(PE) has a purity of 99.9 % and a large flow rate. The nitrogen application of the product is divided into two parts. First, the activator and catalyst require 99.9 % nitrogen(small amount) when filling and emptying, and the reaction kettle uses 99.5 % nitrogen. The amount is large and the customary purity is 99.9 %. Polyethylene, aniline, purity 99.95 %, petrochemical product aniline in catalyst regeneration with nitrogen is about 4 times the usual, but the use period is short. Maleic anhydride and ethanol, generally 99.9 % purity, petrochemical product polyformaldehyde(currently few domestic manufacturers, strong demand), purity 99.9 %. Oil: Nitrogen that can be applied to pipe containers, etc. in the system to sweep and store
