Sodium Formate Method of Oxalic Acid
Yubu pa oxalic acid ku yore mi sodium formate jupoko i yore mi lead man yore mi calcium. Carbon monoxide juyike ku sodium hydroxide solution pi nwangu sodium formate, ma dong juwodhe pi nwangu sodium oxalate. Ma tok cen timo tic ku lead sulfate (yore mi lead) nyo calcium hydroxide (yore mi calcium) mi yubu lead oxalate precipitate nyo calcium oxalate precipitate, ma dong judwoko acid ku sulfuric acid mi nwangu oxalic acid.
Yore mi yubu oxalic acid: I ngei lwoko, lwoko ku alkali, man kwanyo buru, carbon monoxide juyike ni 2 MPa ku compressor, juyike ni 150 °C ku 160 g/L sodium hydroxide, man juoro i reactor pi yubu sodium formate solution. Jam pii ne juyike ni 600 g/L, juoro i kettle mi dehydrogenation kara juyike man juyike ni piny ma tek, man juyike man juyike, man juyike i 400 °C. Dehydrogenated sodium oxalate juyike i suspension, man lead sulfate jumedo i rwom ma malu man jugwoko pH value i 3-4. Piny ma rac ma nyai juwodhu ku lwoko, man i ngeye jumedo sulfuric acid ma ukadhu pi timo acid mi nwangu oxalic acid solution. Barium carbonate man 1% polyacrylamide ju medo pi coagulation man sedimentation pi kwanyu piny ma reco. Jam pii ne juyike, juyike, juyike ku centrifugation, man juyike pi nwangu piny ma judaru.
Yore mi calcium pi yubu oxalic acid: Sodium oxalate suspension man calcium hydroxide suspension ma juyike jupimo man juoro gi i calciumization reactor pi calciumization reactor ithe cing. Pi calciumization ma ju nwango juyike man ju lwoko. Filter sodium hydroxide jutiyo kudu pi yubu sodium formate, man filter cake calcium oxalate jutiyo kudu pi acidification reaction. Mugati ma juyiko ku filter juyiko i calcium oxalate suspension, ma juyiko i acidification kettle ku sulfuric acid man concentrated oxalic acid mother liquor, man juyiko. Filter cake (gypsum) ju lwoko, man pii ma lwoko ju tiyo kudu pi yiko calcium oxalate suspension. Filtrate (oxalic acid solution) juyike pi kwanyu calcium sulfate particles, juyike, juyike, man juyike pi poko oxalic acid, ma judwoko, jupoko, man jutwo pi nwangu piny maber, man kongo ma min ot judwoko kendu.
Yore mi sodium formate lead utiye ku yore ma dongo, ber pa piny ma juyubu, man kare manok mi yubu piny, ku adwogi pa 80%-90% man leng pa oxalic acid pa 99.5%. Ento, lead pollution utiye i yub mi yubu piny, man sodium sulfate ma ju nwango kud i tic ne copo dwogo ngo i yub ne, ci sulfuric acid madwong man caustic soda jutiyo kudu i yub ne. Yore mi calcium pi yubu oxalic acid ecopu jwigo rac pa lead salts man sodium sulfate i pii ma piny, man loko caustic soda ku lime ecopu dwoko piny wel mi yubu piny. CaSO4 ma wok kud i timo ne jucopo loko ni piny mi gedo manangu epe ku ler. I saa marom, kongo ma min NaOH ma ju nwango kud i timo ne jutiyo kudu pi timo tic ku CO pi yiko sodium formate, ma kumeno gwoko wel pa piny ma jutiyo kudu.

Shandong Pulisi Chemical Oxalic Acid: Ber pa piny
Shandong Pulisi Chemical's oxalic acid (≥99.6% purity, CAS 144-62-7) ucungo iwi ultra-low impurities (sulfate ≤0.1%, heavy metals ≤0.002%, iron ≤0.003%) man ISO 900 BV, REMI, FA-SQ, certifications neno ni lubu cik pi soko mi ng'om zoo. Ku kony pa oro 18+ mi ngec mi kemikol, wabe mio bei ma rwate ku factory, logistics ma pong ku udi madongo i Qingdao, Tianjin, Shanghai ports, man packaging ma juyike (25kg/50kg) pi cwalo piny woko maber Shandong Pulisi Chemical Group. Oxalic acid mwa ber akeca i timo piny ma nyai ungo, kwanyu nyai pa cuma, rangi mi bongo, man yiko marble, ma mio tic maber man ma rii pi kare malac, ma copo nyothre ni juwil piny i ng'om zoo.