Indlela ye-Sodium Formate ye-Oxalic Acid
Ukukhiqizwa kwe-oxalic acid ngendlela ye-sodium formate kuhlukaniswe ngendlela ye-lead kanye nendlela ye-calcium. I-carbon monoxide imuncwa yisisombululo se-sodium hydroxide ukuze kutholakale i-sodium formate, bese ikhishwa i-hydrogen ukuze kwakhiwe i-sodium oxalate. Le yokugcina isabela ne-lead sulfate (indlela ye-lead) noma i-calcium hydroxide (indlela ye-calcium) ukuze kwakhiwe i-lead oxalate precipitate noma i-calcium oxalate precipitate, bese ifakwa i-acid nge-sulfuric acid ukuze kutholakale i-oxalic acid.
Indlela ye-lead yokukhiqizwa kwe-oxalic acid: Ngemva kokuwasha, ukuwasha nge-alkali, kanye nokususwa kothuli, i-carbon monoxide icindezelwa ibe yi-2 MPa yi-compressor, ishiswe ku-150 °C nge-160 g/L sodium hydroxide, bese ithunyelwa ku-reactor ukuze kuhlanganiswe isixazululo se-sodium formate esincibilikisiwe. Isixazululo sigxiliswe cishe ku-600 g/L, sithunyelwe eketheni lokukhipha i-hydrogenation ukuze sifudumale futhi sigxishwe sibe yinto eqinile, bese sishiswa futhi sincibilikiswe, bese sikhishwa i-hydrogenation ku-400 °C. I-sodium oxalate ekhishwe i-hydrogenation ilungiswa ibe yi-suspension, bese i-lead sulfate ingezwa ngaphansi kokuxutshwa ngenkathi kugcinwa inani le-pH ku-3-4. Ukungcola okuncibilikayo kususwa ngokuwasha, bese kufakwa i-sulfuric acid eyengeziwe ukuze kutholakale i-acidification ukuze kutholakale isixazululo se-oxalic acid. I-Barium carbonate kanye ne-polyacrylamide engu-1% kuyangezwa ukuze kuhlanganiswe futhi kufakwe i-sedimentation ukuze kususwe ukungcola. Isixazululo siyapholiswa, sicwebezelwe, sihlungwe nge-centrifugation, bese somiswa ukuze kutholakale umkhiqizo oqediwe.
Indlela ye-calcium yokukhiqizwa kwe-oxalic acid: Ukumiswa kwe-sodium oxalate okulungiselelwe kanye nokumiswa kwe-calcium hydroxide kuyalinganiswa bese kuthunyelwa ku-reactor ye-calciumization ukuze kutholakale impendulo ye-calciumization ngaphansi kokuxutshwa. Uketshezi lwe-calciumization olutholiwe luyahlungwa bese lugezwa. I-sodium hydroxide ehlungiwe iyagxishwa futhi isetshenziselwa ukuhlanganisa i-sodium formate, kanti ikhekhe lesihlungi le-calcium oxalate lisetshenziselwa ukusabela kwe-acidification. Ikhekhe lesihlungi lilungiswa libe yi-calcium oxalate suspension, eqiniswa eketheni le-acidification eline-sulfuric acid kanye ne-oxalic acid mother liquor egxilile, bese lihlungwa. Ikhekhe lesihlungi (i-gypsum) liyagezwa, bese uketshezi lokuwasha lusetshenziselwa ukulungiselela ukumiswa kwe-calcium oxalate. I-filtrate (isisombululo se-oxalic acid) iyamuncwa ukuze kususwe izinhlayiya ezincane ze-calcium sulfate, zipholiswe, zicwebezelwe, futhi zibekwe phakathi ukuze kuhlukaniswe i-oxalic acid eluhlaza, ephinde icwecwe, ihlukaniswe, futhi yomiswe ukuze kutholakale umkhiqizo ofanelekile, bese utshwala obungumama buphinde busetshenziswe.
Indlela ye-sodium formate lead inenqubo evuthiwe, ikhwalithi yomkhiqizo ezinzile, kanye nomjikelezo omfushane wokukhiqiza, onesivuno esingu-80%–90% kanye nobumsulwa be-oxalic acid obucwengekile obungu-99.5%. Kodwa-ke, kukhona ukungcola komthofu enqubweni yokukhiqiza, futhi i-sodium sulfate etholakala ekusabeleni ayikwazi ukubuyiselwa enqubweni, ngakho-ke inani elikhulu le-sulfuric acid kanye ne-caustic soda kuyasetshenziswa ekukhiqizeni. Indlela ye-calcium yokwenza i-oxalic acid ingasusa ukungcola kosawoti we-lead kanye ne-sodium sulfate emanzini angaphansi komhlaba, futhi ukufaka esikhundleni se-caustic soda nge-lime kunganciphisa kakhulu izindleko zokukhiqiza. I-CaSO4 yomkhiqizo othathwe ekusabeleni ingacutshungulwa ibe izinto zokwakha ngaphandle kokungcola. Ngesikhathi esifanayo, utshwala obungumama i-NaOH etholakala ekusabeleni isetshenziselwa ukusabela ne-CO ukulungiselela i-sodium formate, ngaleyo ndlela kongiwe inani lezinto zokusetshenziswa.

I-Shandong Pulisi Chemical Oxalic Acid: Izinzuzo Eziyinhloko
I-oxalic acid yeShandong Pulisi Chemical (≥99.6% ubumsulwa, i-CAS 144-62-7) ivelele ngokungcola okuphansi kakhulu (i-sulfate ≤0.1%, izinsimbi ezisindayo ≤0.002%, insimbi ≤0.003%) kanye nezitifiketi ze-ISO 9001, BV, REACH, FAMI-QS, okuqinisekisa ukuhambisana nezimakethe zomhlaba wonke. Sisekelwa yiminyaka engu-18+ yobuchwepheshe bamakhemikhali, sinikeza amanani aqondile embonini, izinto ezigcwele izitsha kanye nezindawo zokugcina impahla kulo lonke elaseQingdao, eTianjin, eShanghai, kanye nokupakishwa okwenziwe ngokwezifiso (25kg/50kg) kokuthunyelwa ngaphandle okungenamthungo eShandong Pulisi Chemical Group. I-oxalic acid yethu idlula kakhulu ekunisweni kwensimbi engavamile, ukususwa kokugqwala kwensimbi, ukudaya izindwangu, kanye nokupholisha imabula, iletha ukusebenza okuqhubekayo kanye nezixazululo eziqhubekayo, ezibolayo kumakhasimende ezimboni emhlabeni jikelele.