Industrial ammonia (NH₃) is produced using advanced purification technology and strict quality control system, with a purity of over 99.999% (5N grade), meeting the stringent requirements for gas purity in high-end manufacturing fields such as semiconductors, new energy, and chemicals. The product complies with the national standard GB/T 14601-2021 "Industrial Ammonia" and international SEMI, ISO and other specifications, and has both high stability and safety.

What is the use of industrial ammonia?

Pan-semiconductor and electronic manufacturing

Chip/panel production: used for silicon nitride/gallium nitride thin film deposition and etching processes to ensure high-precision processing.

LED manufacturing: used as a nitrogen source to generate GaN epitaxial layers to improve the performance of light-emitting devices.

New energy and photovoltaics

Solar cells: generate silicon nitride anti-reflection layers in the PECVD process to improve the photoelectric conversion efficiency.

Surface treatment and metal processing

Metal nitriding: hardening of mechanical parts to enhance wear resistance and fatigue resistance.

Welding protection: as a reducing gas to prevent high-temperature oxidation of metals.

Chemical and environmental protection

Denitrification and emission reduction: used for SCR denitrification in thermal power generation/chemical plants to reduce nitrogen oxide (NOx) emissions.

Chemical synthesis: core raw materials for the production of basic chemical raw materials such as urea and nitric acid.

Scientific research and medical care

Laboratory analysis: used as a carrier gas or reaction gas for material research and synthesis.

Low-temperature sterilization: a key medium in the sterilization process of medical equipment to ensure sterile safety.

Product advantages: Purity up to 99.999%+, impurities ≤0.1ppm, suitable for high-end manufacturing needs; flexible supply (cylinder/storage tank/tank truck), full process safety certification.

What are the three types of industrial ammonia?

Industrial grade ammonia

Uses: metal nitriding hardening, chemical synthesis (urea/nitric acid), welding protection, environmentally friendly denitrification (SCR).

Features: purity ≥ 99.9%, meeting general industrial needs, cost-effective.

Electronic grade high purity ammonia

Uses: semiconductor chips (silicon nitride deposition), LED epitaxial growth, photovoltaic cells (PECVD anti-reflection layer).

Features: purity ≥ 99.999% (5N grade), key impurities (H₂O/O₂) ≤ 0.1ppm, avoiding precision process pollution.

Liquid ammonia

Uses: large-scale chemical production (such as synthetic ammonia), industrial refrigeration systems, bulk denitrification agent supply.

Features: high-pressure liquefied storage, high transportation efficiency, suitable for large-scale applications.

How is industrial ammonia produced?

Raw material synthesis (mainly Haber process)

Raw materials: hydrogen (H₂, from natural gas reforming/water electrolysis) + nitrogen (N₂, produced by air separation).

Reaction: Iron-based catalysts catalyze the synthesis of NH₃ at high temperature (400-500℃) and high pressure (15-25MPa).

Gas purification

Desulfurization/decarbonization: Remove impurities such as sulfide and CO from the raw gas through adsorbents (such as activated carbon and molecular sieves) to avoid catalyst poisoning.

Ammonia purification

Multi-stage refining: Use low-temperature distillation (-33℃ liquefaction separation) + terminal filtration (remove micron-sized particles) to ensure purity ≥99.9% (industrial grade) or ≥99.999% (electronic grade).

Storage and packaging

Gaseous state: Pressurized filling into steel cylinders (40L standard specification).

Liquid state: Store in storage tanks or tank trucks after low-temperature liquefaction to improve transportation efficiency.

How is ammonia classified?

Classification by purity level

Industrial grade ammonia

Purity: ≥99.9%

Uses: chemical synthesis (urea/nitric acid), metal nitriding, environmental protection denitrification (SCR), welding protection.

Features: low cost, suitable for general industrial scenarios.

Electronic grade high purity ammonia

Purity: ≥99.999% (5N grade)

Uses: semiconductor thin film deposition (silicon nitride/gallium nitride), LED epitaxial growth, photovoltaic cell anti-reflection layer (PECVD).

Features: impurities (H₂O/O₂) ≤0.1ppm, avoiding precision process pollution, high price.

Classification by physical form

Gaseous ammonia

Packaging: high-pressure steel cylinders (such as 40L standard bottles), convenient for small-scale flexible use.

Scenario: laboratory, small factory, equipment protection gas.

Liquid ammonia (liquid ammonia)

Storage: low temperature and high pressure liquefaction, storage tank or tank truck transportation.

Scenarios: large-scale chemical synthesis (such as fertilizers), thermal power plant denitrification (SCR), industrial refrigeration systems.

Divided by application areas

Chemical ammonia: basic chemical raw materials such as synthetic urea and nitric acid.

Electronic special gases: high-purity ammonia in semiconductor, photovoltaic, and LED manufacturing.

Environmental ammonia: thermal power/chemical plant denitrification and emission reduction (SCR process).

Medical ammonia: low-temperature sterilization, laboratory analysis reagents.

How does the factory emit ammonia?

Emissions during production and use

Synthetic ammonia plant: process waste gas, equipment seal is not tight resulting in trace leakage.

Chemical/electronics plant: when using ammonia for nitriding and etching, the residual gas that is not completely reacted is released.

Storage and transportation leakage: accidental leakage caused by aging of storage tanks/pipelines, valve failure or operating errors.

Control measures

Technical prevention and control: adopt closed production process, install SCR/adsorption tower to treat waste gas.

Monitoring compliance: real-time gas detector + infrared imaging monitoring, in compliance with the requirements of the "Air Pollution Prevention and Control Law" and other regulations.

Huazhong Gas provides high-purity industrial ammonia, energy-saving and efficient production process, flexible and diverse supply methods. Our products meet international standards to ensure safe and reliable solutions for all walks of life.