Production Process of Industrial Grade Melamine‌

The industrial production of melamine typically involves the ‌urea decomposition method‌, which is the most widely used process due to its cost-effectiveness and scalability. Below is a step-by-step overview of the production process:

‌1. Raw Material Preparation‌

• ‌Urea Supply‌: High-purity urea (NH₂CONH₂) is used as the primary feedstock.
• ‌Pre-treatment‌: Urea is melted and purified to remove impurities (e.g., biuret, moisture) that could affect reaction efficiency.

‌2. Thermal Decomposition Reaction‌

• ‌Reactor‌: The reaction occurs in a ‌fluidized bed reactor‌ or ‌catalytic reactor‌ under controlled conditions.
• ‌Process Conditions‌:
  • ‌High-Pressure Method‌:
    • Temperature: 380–400°C
    • Pressure: 8–10 MPa
    • Catalyst: Silica-alumina (SiO₂-Al₂O₃)
  • ‌Low-Pressure Method‌:
    • Temperature: 350–400°C
    • Pressure: 0.1–1 MPa
    • Catalyst: Ammonia (NH₃) or other gas-phase catalysts.
• ‌Reaction‌: Urea decomposes into melamine, ammonia, and carbon dioxide:
  $6{\text{NH}}^2{\text{CONH}}^2\to {\text{C}}^3{\text{N}}^6{\text{H}}^6(\text{melamine})+6{\text{NH}}^3+3{\text{CO}}^2$

‌3. Gas Separation and Purification‌

• ‌Quenching‌: Hot reaction gases are rapidly cooled to condense melamine vapor into solid particles.
• ‌Ammonia Recovery‌: Ammonia (NH₃) and carbon dioxide (CO₂) byproducts are separated using scrubbers or absorbers. These gases can be recycled to produce urea or other chemicals.
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FAQ
Q1.What's the payment terms?
We could accept these payment terms: T/T L/C DP Escrow Western Union Paypal
Q2.What's the shelf life for the cargos?
Our product's shelf life is 2 years, which is based on dry and ventilated storage.
Q3.What's the delivery time?
We usually deliver the cargos within 10~20 days after receiving customer's payment.
Q4.What documents can we supply?
Commerical Invoice, packing list, bill of loading.The documents will be sent by Express within 24hours against your full payment.

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