Indlela Yekwakha I-Sodium Ye-Oxalic Acid
Kukhicitwa kwe esidi ye oxalic ngendlela ye sodium formate kuhlukaniswe ngendlela yekuhola kanye nendlela ye calcium. I-carbon monoxide imunywa sisombululo se-sodium hydroxide kute kutfolakale i-sodium formate, lese iyasuswa emanti kute yakhe i-sodium oxalate. Loku kwekugcina kuhlangana ne lead sulfate (indlela yekuhola) noma icalcium hydroxide (indlela ye calcium) kwentela kwakha umholi we oxalate noma umholi we calcium oxalate, lese iyahlanganiswa nge sulfuric esidi kwentela kutfola i-oxalic esidi.
Indlela yekuhola yekukhicita i-oxalic acid: Ngemuva kwekugeza, kugeza nge-alkali, kanye nekususa lutfuli, i-carbon monoxide icindetelwa ibe ngu 2 MPa ngumcindzeteli, ishiswe ngaphambilini ibe ngu 150 °C nga 160 g/L we sodium hydroxide, bese itfunyelwa ku reactor kwentela kuhlanganisa sisombululo se sodium formate lencane. Lesixazululo sigcizelelwa cishe ku 600 g/L, sitfunyelwe egedeni lekukhipha emanti kutsi sishiswe bese sigcizelelwa sibe yintfo lecinile, bese siyashiswa bese siyancibilika, bese siyasusa emanti ku 400 °C. Le sodium oxalate lekhishiwe ilungiselelwe ibe yintfo lemisiwe, bese lead sulfate yengetwa ngaphansi kwekuvuselela ngesikhatsi igcina linani le pH ku 3–4. Kungcola lokuncibilikako kususwa ngekugeza, bese kufakwa isulfuric acid lengetulu kwentela kwenta esidi kwentela kutfola sisombululo se oxalic acid. iBarium carbonate kanye na 1% we polyacrylamide kuyangetwa kwentela kuhlanganiswa kanye nekuhlala kwentela kususa kungcola. Lesixazululo siyapholiswa, sibe ngema crystall, sihlungwe nge centrifugation, bese siyawomiswa kwentela kutfola umkhicito lophelile.
Indlela ye calcium yekukhicita i-oxalic acid: Le sodium oxalate lelungiselelwe kumiswa kanye nekumiswa kwe calcium hydroxide kuyalinganiswa bese kutfunyelwa endzaweni yekukhicita i-calcium kwentela kuphendvula kwe-calcium ngaphansi kwekuvuselela. Loku ketshezi lokutfolakele kwe calciumization kuyahlungwa bese kuyagezwa. Le sodium hydroxide lehlungiwe iyagcizelelwa futsi isetjentiselwa kwenta isodium formate, bese lelikhekhe lekuhlunga le calcium oxalate isetjentiselwa kwenta esidi. Lelikhekhe lekuhlunga lilungiswa libe yi calcium oxalate lemisiwe, lefaka esidi egedeni lekufaka esidi nge sulfuric acid kanye ne oxalic acid lecinile ye tjwala lobuke, bese iyahlungwa. Lelikhekhe lekuhlunga (i-gypsum) liyagezwa, bese loludzaka lwekugeza lusetjentiswa kulungisa kumiswa kwe calcium oxalate. Le filtrate (sisombululo se oxalic acid) iyamuncwa kwentela kususa tinhlayiya letincane te calcium sulfate, ipholiswe, ibe yi crystall, bese iya centrifuged kwentela kwehlukanisa ioxalic acid lengakahlutwa, lephindze ibe yi crystall, ihlukaniswe, bese yomiswa kwentela kutfola umkhicito lofanele, bese tjwala lobuyinhloko buyaphindze busetjentiswe.
Lendlela yekuhola ye sodium formate inenchubo levutsiwe, lizinga lemkhicito lelicinile, kanye nemjikeleto wekukhicita lomfishane, ngekukhicita lokungu 80%–90% kanye nekuhlanteka kwe oxalic acid lokucolisiwe lokungu 99.5%. Nomakunjalo, kunekungcola kwe lead kulenchubo yekukhicita, futsi le sodium sulfate letfolakala kulenchubo ayikhoni kubuyiselwa kulenchubo, ngako-ke linani lelikhulu le sulfuric acid kanye ne caustic soda kudliwa ekukhiciteni. Indlela ye calcium yekuhlanganisa i-oxalic acid ingacedza kungcola kwetintfo letiholako kanye ne sodium sulfate emantini langaphansi kwemhlaba, futsi kufaka esikhundleni se caustic soda nge lime kungehlisa kakhulu tindleko tekukhicita. Lomkhicito we CaSO4 lotfolakala kule reaction ungacutshungulwa ube tintfo tekwakha ngaphandle kwekungcola. Ngesikhatsi lesifanako, le NaOH yemake letfolakala ngekuphendvula isetjentiswa kuphendvula ne CO kulungisa iSodium formate, ngaleyondlela kugcinwe linani letintfo letiluhlata.

Emakhemikhali e-Oxalic Acid: Tinzuzo Letiyinhloko
I-oxalic acid ye-Shandong Pulisi Chemical (≥99.6% yekuhlanteka, i-CAS 144-62-7) igcamile ngekungcola lokuphansi kakhulu (i-sulfate ≤0.1%, tinsimbi letisindzako ≤0.002%, insimbi ≤0.003%) kanye netitifiketi te-ISO RMIQ, kuhambisana netimakethe temhlaba wonkhe. Sisekelwe yiminyaka lengu-18+ yebungcweti bemakhemikhali, siniketa intsengo lecondzile efektri, kuhanjiswa kwetintfo letigcwele letinetindzawo tekugcina tintfo kulo lonkhe laseQingdao, eTianjin, emachwebeni aseShanghai, kanye nekupakisha ngekwemvelo (25kg / 50kg) kwekutfumela ngaphandle kwemthungoShandong Pulisi Chemical Group. I-oxalic acid yetfu ihamba embili ekugcineni kwensimbi lengakavami, kususa umhlwa wensimbi, kudaya tindvwangu, kanye nekucwebetela kwemabhali, kuletsa kusebenta lokungagucuki kanye netisombululo letisimeme, letibolako temakhasimende etimboni emhlabeni wonkhe.