Filiera polietilene

flowchart LR hdpePolymerization["polimerizzazione HDPE"] ldpePolymerization["polimerizzazione LDPE"] pePelletizing["pelletizzazione PE"] s_ethylene(["C2H4"]):::role_rawMaterial s_ethylene --> hdpePolymerization s_zieglerNattaCatalyst(["catalizzatore Ziegler-Natta"]):::role_catalyst s_zieglerNattaCatalyst -.-> hdpePolymerization s_hdpe(["polietilene alta densità"]):::role_intermediate hdpePolymerization --> s_hdpe s_polyethylene(["PE"]):::role_byproduct hdpePolymerization -.-> s_polyethylene s_ethylene --> ldpePolymerization s_peroxideInitiator(["perossido"]):::role_utility s_peroxideInitiator --> ldpePolymerization s_ldpe(["polietilene bassa densità"]):::role_intermediate ldpePolymerization --> s_ldpe ldpePolymerization -.-> s_polyethylene s_hdpe --> pePelletizing s_ldpe --> pePelletizing s_pePellet(["pellet di polietilene"]):::role_finalProduct pePelletizing --> s_pePellet 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:polyethylenePipeline .
} ORDER BY ?role