Nzira yeSodium Formate yeOxalic Acid
Kugadzirwa kweoxalic acid nenzira yesodium formate kwakakamurwa kuva nzira ye lead uye nzira ye calcium. Carbon monoxide inotorwa ne sodium hydroxide solution kuti iwane sodium formate, iyo inobva yabviswa hydrogenation kuti igadzire sodium oxalate. Iyo yekupedzisira inosangana ne lead sulfate (nzira ye lead) kana calcium hydroxide (nzira ye calcium) kuti igadzire lead oxalate precipitate kana calcium oxalate precipitate, iyo inobva yaiswa acid ne sulfuric acid kuti iwane oxalic acid.
Nzira yekugadzira oxalic acid: Mushure mekusuka, kusukwa kwealkali, uye kubvisa guruva, kabhoni monoxide inomanikidzwa kusvika 2 MPa necompressor, yopiswa kusvika 150 °C ne 160 g/L sodium hydroxide, yotumirwa kune reactor kuti igadzire sodium formate solution. Mhinduro yacho inosanganiswa kusvika 600 g/L, yotumirwa mukettle yekudzima hydrogenation kuti ipiswe uye isanganiswe kuita solid, yozopiswa uye yanyungudutswa, uye yabviswa hydrogenation pa 400 °C. Sodium oxalate isina hydrogenation inogadzirwa kuita suspension, uye lead sulfate inowedzerwa ichikurunga uku pH ichiramba iri pa 3–4. Tsvina inonyunguduka inobviswa nekusukwa, uye sulfuric acid yakawandisa inowedzerwa kuti iwane acidification kuti iwane oxalic acid solution. Barium carbonate ne 1% polyacrylamide zvinowedzerwa kuti zviome uye zvisaparare kuti zvibvise tsvina. Mhinduro yacho inotonhodzwa, inocheneswa, inosefetwa ne centrifugation, uye inoomeswa kuti pave nechigadzirwa chapera.
Nzira yecalcium yekugadzira oxalic acid: Sodium oxalate suspension yakagadzirwa uye calcium hydroxide suspension inoyerwa uye inotumirwa ku calciumization reactor kuti iite calciumization reaction iri kusanganiswa. Calciumization liquid inowanikwa inoseferwa uye inogezwa. Filtrate sodium hydroxide inosanganiswa uye inoshandiswa kugadzira sodium formate, uye filter cake calcium oxalate inoshandiswa kuita acidification reaction. filter cake inogadzirwa kuita calcium oxalate suspension, iyo inoiswa acid mu acidification kettle ine sulfuric acid uye concentrated oxalic acid mother liquor, yozoseferwa. filter cake (gypsum) inogezwa, uye washing liquid inoshandiswa kugadzira calcium oxalate suspension. Filtrate (oxalic acid solution) inonyungudutswa kuti ibvise zvidimbu zve calcium sulfate, inotonhodzwa, inogadzirwa crystallized, uye inoiswa centrifuge kuti iparadzanise crude oxalic acid, iyo inodzokororwa, inoparadzaniswa, uye inoomeswa kuti iwane chigadzirwa chakakodzera, uye mother liquor inodzokororwa.
Nzira ye sodium formate lead ine maitiro akakura, mhando yechigadzirwa yakagadzikana, uye nguva pfupi yekugadzira, ine goho re80%–90% uye kuchena kwe oxalic acid kwakagadziridzwa kwe99.5%. Zvisinei, pane kusvibiswa kwe lead mukugadzirwa, uye sodium sulfate inowanikwa kubva mukuita kwe ...

Shandong Pulisi Chemical Oxalic Acid: Mabhenefiti Akakosha
Shandong Pulisi Chemical's oxalic acid (≥99.6% purity, CAS 144-62-7) inoonekwa nekusvibiswa kwakaderera zvakanyanya (sulfate ≤0.1%, heavy metals ≤0.002%, iron ≤0.003%) uye ISO 9001, BV, REACH, FAMI-QS certifications, zvichivimbisa kutevedzera mitemo yemisika yepasi rose. Tichitsigirwa nemakore anopfuura 18 ehunyanzvi hwemakemikari, tinopa mitengo yefekitori, zvinhu zvese zvine magaba nematura muQingdao, Tianjin, Shanghai ports, uye mapurasitiki akagadzirwa (25kg/50kg) ekutumira kunze pasina musonoShandong Pulisi Chemical Group. Oxalic acid yedu inobudirira mukunaya kwesimbi isingawanzoonekwi, kubvisa ngura yesimbi, kudhaya machira, uye kupukuta marble, ichipa mashandiro akasimba uye mhinduro dzinogara kwenguva refu, dzinoora kune vatengi vemaindasitiri pasi rese.