Oxalic Acid hmanga Sodium Formate hman dan
Sodium formate hmanga oxalic acid siam chhuah dan chu lead method leh calcium method-ah then a ni. Carbon monoxide chu sodium hydroxide solution hmangin sodium formate a lo chhuak a, chu chu dehydrogenated a ni a, sodium oxalate a siam a ni. Hemi hnuhnung zawk hian lead sulfate (lead method) emaw calcium hydroxide (calcium method) emaw nen an inrem a, lead oxalate precipitate emaw calcium oxalate precipitate emaw a siam a, chu chu sulfuric acid nen acidified niin oxalic acid a lo chhuak ta a ni.
Oxalic acid siamna atana lead method: Silfai, alkali silfai leh leivut lakchhuah hnuah carbon monoxide chu compressor hmangin 2 MPa-ah compress a ni a, 160 g/L sodium hydroxide hmangin 150 °C-ah preheated a ni a, reactor-ah thawnin dilute sodium formate solution siam a ni. Chu solution chu 600 g/L velin an concentrate a, dehydrogenation kettle-ah an thawn a, chu chu a lum a, solid-ah dah a ni a, chutah chuan a lum a, a hmin a, 400 °C-ah dehydrogenated a ni. Dehydrogenated sodium oxalate chu suspension-ah siam a ni a, pH value 3–4-a awm reng chungin stirring hnuaiah lead sulfate dah a ni. Soluble impurities te chu silfai hmangin an paih chhuak a, chutah chuan sulfuric acid tam lutuk chu acidification atan dahin oxalic acid solution an hmu a ni. Barium carbonate leh 1% polyacrylamide te chu coagulation leh sedimentation atan dahin bawlhhlawh paih a ni. Solution chu a lum a, a crystallized a, centrifugation hmangin a filter a, a vawt a, a siam zawh tawh chu a hmu chhuak ta a ni.
Oxalic acid siamna atana calcium hman dan: Sodium oxalate suspension leh calcium hydroxide suspension siam chu quantified niin calciumization reactor-ah stirring hnuaiah calciumization reaction atan thawn a ni. Calciumization liquid hmuh chu filter a, silfai a ni. Filtrate sodium hydroxide chu concentrate-in sodium formate siam nan hman a ni a, filter cake calcium oxalate chu acidification reaction atan hman a ni bawk. Filter cake chu calcium oxalate suspension-ah siam a ni a, chu chu acidification kettle-ah sulfuric acid leh concentrated oxalic acid mother liquor hmangin acidified a ni a, chutah chuan filter a ni. Filter cake (gypsum) chu silfai a ni a, chu washing liquid chu calcium oxalate suspension siam nan hman a ni. Filtrate (oxalic acid solution) chu adsorbe-in calcium sulfate particles te chu paih chhuakin, a lum a, a crystallized a, centrifuge-in crude oxalic acid a inthen a, chu chu recrystallized, separate, leh dried-in qualified product hmuh theih a ni a, mother liquor chu recycle a ni.
Sodium formate lead method hian process puitling tak, product quality nghet tak, leh production cycle tawi tak a nei a, yield 80%–90% a nei a, refined oxalic acid purity chu 99.5% a ni. Mahse, a siam chhuahnaah hian lead pollution a awm a, chu chu reaction atanga sodium sulfate hmuh chu a siamnaah a kir leh theih loh avangin sulfuric acid leh caustic soda tam tak chu siamchhuahnaah a hmang zo vek a ni. Oxalic acid siamna atana calcium hman dan hian leihnuai tuiah lead salt leh sodium sulfate bawlhhlawh a ti bo thei a, caustic soda aiah lime hmanga thlak chuan siamchhuah man nasa takin a tihtlem thei bawk. Reaction atanga by-product CaSO4 hmuh chu boruak bawlhhlawh awm lovin building material-ah siam theih a ni. Chutih rual chuan, reaction atanga mother liquor NaOH hmuh chu CO nen react in sodium formate siam a ni a, chu chuan raw materials a humhim thei a ni.

Shandong Pulisi Chemical Oxalic Acid: A thatna bulpui ber
Shandong Pulisi Chemical-a oxalic acid (≥99.6% thianghlimna, CAS 144-62-7) chu ultra-low impurities (sulfate ≤0.1%, heavy metals ≤0.002%, iron ≤0.003%) leh ISO 9001, BV, REACH, FAMI-QS certifications, zawm a nih theih nan a langsar hle khawvel pum huap market tan a ni. Kum 18+ chhung zet chemical lama thiamna nei tawhin kan thlawp a, factory-direct pricing, Qingdao, Tianjin, Shanghai port hrang hranga warehouse nei full-container logistics, leh customized packaging (25kg/50kg) te chu seamless exportShandong Pulisi Chemical Group atan kan pe a ni. Kan oxalic acid hian rare earth metal precipitation, metal rust removal, textile dyeing, leh marble polishing-ah te a tha hle a, khawvel puma industrial client-te tan performance mumal tak leh sustainable, biodegradable solutions a pe chhuak a ni.