Ndlela ya Sodium Formate ya Oxalic Acid
Ku endliwa ka oxalic acid hi ndlela ya sodium formate swi avanyisiwile hi ndlela ya lead na ndlela ya calcium. Carbon monoxide yi tswongiwa hi sodium hydroxide solution kuva yikuma sodium formate, leyi endzhaku yi susiwaka hayidirojeni kuva yi endla sodium oxalate. Leyo hetelela yi endla nhluvuko na lead sulfate (ndlela ya lead) kumbe calcium hydroxide (ndlela ya calcium) ku endla lead oxalate precipitate kumbe calcium oxalate precipitate, leyi endzhaku yi endliwaka acid hi sulfuric acid kuva yikuma oxalic acid.
Ndlela ya lead ya vuhumelerisi bya oxalic acid: Endzhaku ko hlantswiwa, ku hlantswiwa hi alkali, naku susa ntshuri, carbon monoxide yi tshikileriwa kuya eka 2 MPa hi compressor, yi hisiwa kuya eka 150 °C hi 160 g/L sodium hydroxide, kutani yi rhumeriwa eka reactor kuva yi endla dilute sodium formate solution. Nkatsakanyo wu hlanganisiwa kuya kwalomu ka 600 g/L, wu rhumeriwa eka kettle ya dehydrogenation leswaku wuta hisiwa kutani wu hlanganisiwa kuva wuva solid, kutani wu hisiwa naku n’okisiwa, naswona wu susiwa hydrogen eka 400 °C. Sodium oxalate leyinga dehydrogenated yi lulamisiwa kuva yiva suspension, naswona lead sulfate yi cheriwa ehansi ka ku hlanganisiwa loko kurikarhi ku hlayisiwa nhlayo ya pH eka 3–4. Thyaka leri n’okaka ri susiwa hiku hlantswiwa, kutani ku cheriwa sulphuric acid leyi tlulaka mpimo kuva yi endliwa acid kuva ku kumiwa nkatsakanyo wa oxalic acid. Barium carbonate na 1% polyacrylamide swi cheriwa eka coagulation na sedimentation ku susa thyaka. Nkatsakanyo lowu wu titimela, wu endliwa crystallized, wu sefiwa hi centrifugation, kutani wu omisiwa leswaku kuta kumeka xitirhisiwa lexi hetiweke.
Ndlela ya calcium eka vuhumelerisi bya oxalic acid: Sodium oxalate suspension leyi lulamisiweke na calcium hydroxide suspension swi pimiwa kutani swi rhumeriwa eka calciumization reactor kuva ku endliwa calciumization reaction ehansi ka ku hlanganisiwa. Mati ya calciumization lawa ya kumiweke ya sefiwa kutani ya hlantswiwa. Filtrate sodium hydroxide yi hlanganisiwa naswona yitirhisiwa ku endla sodium formate, naswona filter cake calcium oxalate yitirhisiwa eka acidification reaction. Cake ya filter yi lulamisiwile kuva yiva calcium oxalate suspension, leyi endliwaka acid eka kettle ya acidification hi sulfuric acid na concentrated oxalic acid mother liquor, kutani yi sefiwa. Cake ya filter (gypsum) ya hlantswiwa, naswona mati yo hlamba ya tirhisiwa ku lulamisa calcium oxalate suspension. Filtrate (oxalic acid solution) yi adsorbed ku susa ti calcium sulfate particles letinene, yi kufumetiwa, yi crystallized, naswona yi centrifuged kuva yi hambanyisa crude oxalic acid, leyi tlhelaka yi crystallized, yi hambanisiwa, naswona yi omisiwa kuva yikuma xitirhisiwa lexi faneleke, naswona byala bya manana byi tlhela byi tirhisiwa.
Ndlela ya sodium formate lead yina maendlelo lawa ya vupfeke, khwalithi ya swihumelerisiwa leyi tiyeke, na xirhendzevutani xo koma xa vuhumelerisi, laha kungana mbuyelo wa 80%–90% xikan’we na ku basa ka oxalic acid leyi antswisiweke ya 99.5%. Hambiswiritano, kuna thyaka ra lead eka maendlelo ya vuhumelerisi, naswona sodium sulfate leyi kumekaka kusuka eka reaction ayi tlheriseriwa eka maendlelo, hikokwalaho nhlayo leyikulu ya sulfuric acid na caustic soda swa dyiwa eka vuhumelerisi. Ndlela ya calcium yo endla oxalic acid yinga herisa ku thyakisa ka lead salts na sodium sulfate eka mati yale hansi ka misava, naswona ku cinca caustic soda hi lime swinga hunguta swinene ku durha ka vuhumelerisi. By-product CaSO4 leyi kumiwaka kusuka eka reaction yinga lulamisiwa kuva switirhisiwa swo aka handle ka thyaka. Hi nkarhi walowo, manana liquor NaOH leyi kumiwaka kusuka eka reaction yitirhisiwa ku endla reaction na CO kuva yi lulamisa sodium formate, hindlela yaleyo ku hlayisiwa nhlayo ya switirhisiwa swoka swinga lulamisiwanga.

Shandong Pulisi Tikhemikhali ta Oxalic Acid: Swipfuno swa nkoka
Shandong Pulisi Chemical’s oxalic acid (≥99.6% ku basa, CAS 144-62-7) yi humelela hi thyaka rale hansi swinene (sulfate ≤0.1%, tinsimbi to tika ≤0.002%, iron ≤0.003%) na ISO 9001, BV, REACH, switifikheti swa FAMI-QS, leswi tiyisisaka ku landzelerisa eka timakete ta misava hinkwayo. Hi seketeriwa hi malembe ya 18+ ya vutshila bya tikhemikhali, hi nyika minxavo yo kongoma ya fektri, vutleketli bya swikhomela-ndhawu leswi heleleke na vuhlayiselo ku tsemakanya Qingdao, Tianjin, swikepe swa Shanghai, na ku pakiwa loku endleriweke (25kg/50kg) ku rhumela ehandle loku nga na swiphiqoShandong Pulisi Chemical Group. Oxalic acid ya hina yi humelela eka ku khuluka ka nsimbi ya misava leyi nga tolovelekangiki, ku susa rust ya nsimbi, ku daya swiambalo, na ku pholisha marble, ku tisa matirhelo lama nga cincekiki na swintshuxo leswi nga heriki, leswi nga onhaka hi swilo leswi hanyaka eka tiklayenti ta tiindasitiri emisaveni hinkwayo.