melamina da urea (alta pressione)

flowchart LR melamineHpSynthesis["sintesi melamina alta pressione da urea"] melaminePurificationCryst["quench + cristallizzazione + lavaggio melamina"] s_urea(["urea"]):::role_rawMaterial s_urea --> melamineHpSynthesis s_melamineCrude(["melamina grezza + NH3 gas"]):::role_intermediate melamineHpSynthesis --> s_melamineCrude s_ammonia(["ammoniaca"]):::role_byproduct melamineHpSynthesis -.-> s_ammonia s_carbonDioxide(["carbon dioxide"]):::role_byproduct melamineHpSynthesis -.-> s_carbonDioxide s_melamineCrude --> melaminePurificationCryst s_water(["acqua"]):::role_utility s_water --> melaminePurificationCryst s_melamine(["melammina"]):::role_finalProduct melaminePurificationCryst --> s_melamine classDef role_rawMaterial fill:#e8f4ff,stroke:#06c,color:#003 classDef role_finalProduct fill:#e8ffe8,stroke:#0a7,color:#030 classDef role_intermediate fill:#f0f0f0,stroke:#666,color:#333 classDef role_byproduct fill:#fff4e0,stroke:#cc7a00,color:#642 classDef role_waste fill:#fae8e8,stroke:#888,stroke-dasharray:3 3,color:#444 classDef role_utility fill:#e0f7f7,stroke:#06c8c8,color:#033 classDef role_catalyst fill:#fde0f0,stroke:#cc3399,color:#506 classDef role_mine fill:#f5e6d3,stroke:#8b5a2b,color:#3d2e15,stroke-width:2px

PREFIX chem: <https://ontology.siletto.it/chem-pipeline#>
SELECT ?role ?substance WHERE {
  ?substance chem:playsRole ?ra .
  ?ra chem:role ?role ; chem:inPipeline chem:melaminePipeline .
} ORDER BY ?role