Kuchenesa Sodium Hydrosulfide: Nhoroondo uye Ruzivo

Muindasitiri yepetroleum nemakemikari, maitiro ekuchenesa akadai se vacuum distillation uye catalytic cracking anowanzo gadzira magasi ane acidic. Magasi aya ane acidic anowanzo kuve ne 85%–95% hydrogen sulfide (H₂S), 3%–10% carbon dioxide (CO₂), 2%–5% organic gases, uye 0.5%–3% zvimwe zvikamu.

Mafekitori madiki nepakati anowanzo gadzirisa magasi aya ane acidic nekuanyudza ne30% sodium hydroxide (NaOH) solution. NaOH inosangana neH₂S kuti igadzire sodium hydrosulfide (NaHS). Kana huwandu hweNaHS mumushonga hwasvika 30%, mushonga unopinda muchirongwa chekuwanda. Mushure mekushaya mvura uye kuwanda, huwandu hweNaHS hunowedzera kusvika 70%, uye NaHS yakanyungudutswa inobva yachekwa kuita zvidimbu.

Zvisinei, sezvo magasi ane acidic aine CO₂, tsvina yakaita sesodium carbonate (Na₂CO₃) inogadzirwa panguva yekurapwa, zvichideredza kuchena kwechigadzirwa cheNaHS.

Pamusoro pezvo, kana madhiramu akavhurika akashandiswa kucheka NaHS yakanyungudutswa, NaHS inowanzoita oxygen iri mumhepo, zvoita sodium thiosulfate (Na₂S₂O₃), iyo inogona kuora uye yakaoma kuchengeta. Kucheka kwakavhurika kunoburitsawo magasi anotsamwisa, zvichisvibisa nharaunda yekugadzira.

Dzvanya apa kuti uwane mutengo wakaderedzwa we sodium hydrosulfide, pachava nezvinoshamisa.