Indlela yeSodium Formate yeOxalic Acid
Ukuveliswa kwe-oxalic acid ngendlela ye-sodium formate kwahlulwe phakathi kwendlela ye-lead kunye nendlela ye-calcium. I-carbon monoxide ifunxwa sisisombululo se-sodium hydroxide ukuze kufunyanwe i-sodium formate, ethi emva koko ikhutshwe i-hydrogen ukuze kwenziwe i-sodium oxalate. Le yokugqibela isabela kunye ne-lead sulfate (indlela ye-lead) okanye i-calcium hydroxide (indlela ye-calcium) ukuze kwenziwe i-lead oxalate precipitate okanye i-calcium oxalate precipitate, ethi emva koko ifakwe i-sulfuric acid ukuze kufunyanwe i-oxalic acid.
Indlela ye-lead yokuvelisa i-oxalic acid: Emva kokuhlamba, ukuhlamba nge-alkali, kunye nokususa uthuli, i-carbon monoxide icinezelwa kwi-2 MPa yi-compressor, ifudunyezwe kwi-150 °C nge-160 g/L ye-sodium hydroxide, ize ithunyelwe kwi-reactor ukuze kwenziwe isisombululo se-sodium formate esinyibilikisiweyo. Isisombululo sigxininiswe kwi-600 g/L, sithunyelwe kwi-kettle ye-dehydrogenation ukuze sifudunyezwe kwaye sigxininiswe kwi-solid, emva koko sifudunyezwe kwaye sinyibilikiswe, kwaye sinyibilikiswe kwi-400 °C. I-sodium oxalate enyibilikisiweyo ilungiswa ibe yi-suspension, kwaye i-lead sulfate yongezwa phantsi kokuxutywa ngelixa igcina ixabiso le-pH kwi-3–4. Ukungcola okunyibilikayo kususwa ngokuhlanjwa, kwaye emva koko kongezwa i-sulfuric acid engaphezulu ukuze kufunyanwe i-acid ukuze kufunyanwe isisombululo se-oxalic acid. I-Barium carbonate kunye ne-1% ye-polyacrylamide zongezwa ukuze zijiye kwaye zitshiswe ukuze kususwe ukungcola. Isisombululo siyapholiswa, senziwe i-crystallized, sihluzwe nge-centrifugation, kwaye somiswe ukuze kufunyanwe imveliso egqityiweyo.
Indlela yeCalcium yokuvelisa i-oxalic acid: I-sodium oxalate suspension elungisiweyo kunye ne-calcium hydroxide suspension ziyalinganiswa kwaye zithunyelwe kwi-calciumization reactor ukuze kubekho i-calciumization reaction phantsi kokuxutywa. Ulwelo lwe-calciumization olufunyenweyo luyahluzwa kwaye luhlanjwe. I-sodium hydroxide ye-filtrate ixutywe kwaye isetyenziselwa ukwenza i-sodium formate, kwaye i-filter cake calcium oxalate isetyenziselwa i-acidification reaction. I-filter cake ilungiswa ibe yi-calcium oxalate suspension, efakwa i-acid kwi-kettle ye-acidification ene-sulfuric acid kunye ne-oxalic acid egxininisiweyo kunye notywala be-mother, ize ihluzwe. I-filter cake (i-gypsum) iyahlanjwa, kwaye ulwelo lokuhlamba lusetyenziselwa ukulungiselela i-calcium oxalate suspension. I-filtrate (isisombululo se-oxalic acid) iyafunxwa ukuze kususwe amasuntswana amancinci e-calcium sulfate, apholiswe, acwecwe, kwaye axutywe ukuze kwahlulwe i-oxalic acid ekrwada, ephinda iguqulwe, yahlulwe, kwaye yomiswe ukuze kufunyanwe imveliso efanelekileyo, kwaye utywala be-mother buphinde busetyenziswe.
Indlela ye-sodium formate lead inenkqubo evuthiweyo, umgangatho wemveliso ozinzileyo, kunye nomjikelo omfutshane wemveliso, kunye nesivuno se-80%–90% kunye nobumsulwa be-oxalic acid obucociweyo obuyi-99.5%. Nangona kunjalo, kukho ungcoliseko lwe-lead kwinkqubo yemveliso, kwaye i-sodium sulfate efunyenwe kwi-reaction ayinakubuyiselwa kwinkqubo, ngoko ke isixa esikhulu se-sulfuric acid kunye ne-caustic soda ziyasetyenziswa kwimveliso. Indlela ye-calcium yokwenza i-oxalic acid inokuphelisa ungcoliseko lweetyuwa ze-lead kunye ne-sodium sulfate emanzini angaphantsi komhlaba, kwaye ukutshintsha i-caustic soda ngelayimu kunokunciphisa kakhulu iindleko zemveliso. I-CaSO4 yemveliso efunyenwe kwi-reaction inokucutshungulwa ibe zizinto zokwakha ngaphandle kongcoliseko. Kwangaxeshanye, utywala obungumama i-NaOH efunyenwe kwi-reaction isetyenziselwa ukusabela ne-CO ukulungiselela i-sodium formate, ngaloo ndlela konga inani lezinto eziluhlaza.

I-Shandong Pulisi Chemical Oxalic Acid: Iingenelo eziphambili
I-oxalic acid yeShandong Pulisi Chemical (≥99.6% ubumsulwa, i-CAS 144-62-7) ivelele ngokungcola okuphantsi kakhulu (i-sulfate ≤0.1%, iintsimbi ezinzima ≤0.002%, isinyithi ≤0.003%) kunye neziqinisekiso ze-ISO 9001, BV, REACH, FAMI-QS, eziqinisekisa ukuthotyelwa kwemithetho kwiimarike zehlabathi. Sixhaswa bubuchule beekhemikhali obungaphezu kweminyaka eli-18, sinikezela ngamaxabiso ngqo kwifektri, izinto ezigcweleyo kunye neendawo zokugcina impahla kulo lonke elaseQingdao, eTianjin, eShanghai, kunye nokupakisha okwenziwe ngokwezifiso (25kg/50kg) ukuze kuthunyelwe ngaphandle ngaphandle kwe-Shandong Pulisi Chemical Group. I-oxalic acid yethu igqwesile kwi-rare earth metal precipitation, ukususa i-metal rust, ukudaya ilaphu, kunye nokupolisha imabula, inikezela ngokusebenza rhoqo kunye nezisombululo ezizinzileyo, ezinokubola kubathengi bemizi-mveliso kwihlabathi liphela.