Txoj Kev Sodium Formate ntawm Oxalic Acid
Kev tsim cov oxalic acid los ntawm txoj kev sodium formate yog muab faib ua txoj kev lead thiab txoj kev calcium. Cov pa roj carbon monoxide raug nqus los ntawm cov kua sodium hydroxide kom tau txais sodium formate, uas tom qab ntawd dehydrogenated los ua sodium oxalate. Qhov kawg reacts nrog lead sulfate (txoj kev lead) lossis calcium hydroxide (txoj kev calcium) los ua cov lead oxalate precipitate lossis calcium oxalate precipitate, uas tom qab ntawd acidified nrog sulfuric acid kom tau txais oxalic acid.
Txoj kev ua cov hlau lead rau kev tsim cov kua qaub oxalic: Tom qab ntxuav, ntxuav alkali, thiab tshem tawm cov plua plav, cov pa roj carbon monoxide raug nias rau 2 MPa los ntawm lub tshuab compressor, preheated rau 150 ° C nrog 160 g / L sodium hydroxide, thiab xa mus rau lub reactor los tsim cov kua sodium formate dilute. Cov kua raug concentrated rau txog 600 g / L, xa mus rau lub lauj kaub dehydrogenation kom sov thiab concentrated rau hauv cov khoom khov, tom qab ntawd cua sov thiab yaj, thiab dehydrogenated ntawm 400 ° C. Cov dehydrogenated sodium oxalate tau npaj rau hauv kev ncua, thiab cov hlau lead sulfate raug ntxiv rau hauv qab do thaum tswj hwm tus nqi pH ntawm 3-4. Cov khoom tsis huv uas yaj tau raug tshem tawm los ntawm kev ntxuav, thiab tom qab ntawd cov kua qaub sulfuric ntau dhau raug ntxiv rau acidification kom tau txais cov kua qaub oxalic. Barium carbonate thiab 1% polyacrylamide raug ntxiv rau coagulation thiab sedimentation kom tshem tawm cov khoom tsis huv. Cov kua raug txias, crystallized, lim los ntawm centrifugation, thiab ziab kom tau txais cov khoom tiav.
Txoj kev Calcium rau kev tsim cov kua qaub oxalic acid: Cov kua qaub sodium oxalate uas tau npaj tseg thiab cov kua qaub calcium hydroxide uas tau npaj tseg raug ntsuas thiab xa mus rau lub tshuab ua kom cov kua qaub calcium rov qab ua haujlwm raws li kev sib xyaw. Cov kua qaub calcium uas tau txais raug lim thiab ntxuav. Cov kua qaub sodium hydroxide uas tau lim lawm raug concentrated thiab siv rau kev tsim cov sodium formate, thiab cov kua qaub calcium oxalate uas tau lim lawm siv rau cov kua qaub acidification. Cov kua qaub lim tau npaj rau hauv cov kua qaub calcium oxalate uas tau ua kom cov kua qaub acidification, uas tau ua kom cov kua qaub acidification nrog cov kua qaub sulfuric acid thiab cov kua qaub oxalic acid uas tau concentrated, thiab tom qab ntawd lim. Cov kua qaub lim (gypsum) raug ntxuav, thiab cov kua ntxuav tau siv los npaj cov kua qaub calcium oxalate uas tau lim lawm. Cov kua qaub lim (cov kua qaub oxalic acid) raug adsorbed kom tshem tawm cov calcium sulfate me me, txias, crystallized, thiab centrifuged kom cais cov kua qaub oxalic acid nyoos, uas tau recrystallized, sib cais, thiab ziab kom tau txais cov khoom tsim nyog, thiab cov kua qaub niam tau rov ua dua tshiab.
Txoj kev sodium formate lead muaj cov txheej txheem paub tab, cov khoom zoo ruaj khov, thiab lub voj voog luv luv, nrog rau cov txiaj ntsig ntawm 80% -90% thiab cov kua qaub oxalic acid purity ntawm 99.5%. Txawm li cas los xij, muaj cov kuab paug ntawm cov kua qaub hauv cov txheej txheem ntau lawm, thiab cov sodium sulfate tau los ntawm cov tshuaj tiv thaiv tsis tuaj yeem rov qab mus rau cov txheej txheem, yog li ntau cov sulfuric acid thiab caustic soda raug noj hauv kev tsim khoom. Txoj kev calcium rau kev tsim cov oxalic acid tuaj yeem tshem tawm cov kuab paug ntawm cov ntsev txhuas thiab sodium sulfate rau hauv av, thiab hloov caustic soda nrog txiv qaub tuaj yeem txo cov nqi tsim khoom ntau heev. Cov khoom lag luam CaSO4 tau los ntawm cov tshuaj tiv thaiv tuaj yeem ua tiav rau hauv cov ntaub ntawv tsim kho yam tsis muaj kuab paug. Tib lub sijhawm, cov kua txiv hmab txiv ntoo NaOH tau los ntawm cov tshuaj tiv thaiv siv los tiv thaiv nrog CO los npaj sodium formate, yog li txuag tau cov khoom siv raw.

Shandong Pulisi Tshuaj Oxalic Acid: Cov txiaj ntsig tseem ceeb
Shandong Pulisi Chemical's oxalic acid (≥99.6% purity, CAS 144-62-7) sawv tawm nrog cov khoom tsis huv uas tsis muaj zog heev (sulfate ≤0.1%, cov hlau hnyav ≤0.002%, hlau ≤0.003%) thiab ISO 9001, BV, REACH, FAMI-QS daim ntawv pov thawj, ua kom ntseeg tau tias ua raws li kev lag luam thoob ntiaj teb. Txhawb nqa los ntawm 18+ xyoo ntawm kev txawj ntse tshuaj lom neeg, peb muab cov nqi ncaj qha los ntawm lub Hoobkas, kev xa khoom puv nrog cov chaw khaws khoom thoob plaws Qingdao, Tianjin, Shanghai chaw nres nkoj, thiab cov ntim khoom tshwj xeeb (25kg / 50kg) rau kev xa khoom tsis muaj teeb meem Shandong Pulisi Chemical Group. Peb cov oxalic acid zoo heev hauv kev ua cov hlau tsis tshua muaj av, tshem tawm cov hlau xeb, textile dyeing, thiab marble polishing, xa cov kev ua tau zoo tas li thiab cov kev daws teeb meem biodegradable rau cov neeg siv khoom lag luam thoob ntiaj teb.