Calcium formate siv

Calcium formate siv: txhua yam qhuav mix mortar, txhua yam ntawm cov pob zeb, hnav-resistant cov ntaub ntawv, pem teb kev lag luam, pub kev lag luam, tanning. Tus nqi ntawm calcium formate yog kwv yees li 0.5 ~ 1.0% ib tuj qhuav mortar thiab pob zeb, thiab qhov siab tshaj qhov ntxiv yog 2.5%. Tus nqi ntawm calcium formate yog maj mam nce nrog qhov txo qis ntawm qhov kub thiab txias, thiab txawm tias qhov nyiaj ntawm 0.3-0.5% yog siv rau lub caij ntuj sov, nws yuav ua rau muaj zog thaum ntxov.
Calcium formate yog me ntsis hygroscopic thiab saj me ntsis iab. Neutral, non-toxic, soluble hauv dej. Cov tshuaj aqueous yog nruab nrab. Solubility ntawm calcium formate tsis hloov ntau nrog qhov kub thiab txias, 16g / 100g dej ntawm 0 ℃ thiab 18.4g / 100g dej ntawm 100 ℃. Lub ntiajteb txawj nqus tshwj xeeb: 2.023 (20 ℃), qhov ntom ntom 900-1000g / L. Cua sov decomposition kub> 400 ℃.
Hauv kev tsim kho, nws yog siv los ua tus neeg sawv cev ceev ceev, lubricant thiab lub zog thaum ntxov rau cov cement. Siv nyob rau hauv lub tsev mortar thiab ntau yam pob zeb, ua kom lub hardening ceev ntawm cov cement, txo lub sij hawm teem, tshwj xeeb tshaj yog nyob rau hauv lub caij ntuj no kev tsim kho, kom tsis txhob kub kub qhov chaw ceev yog qeeb heev. Fast demoulding, kom cov cement sai li sai tau los txhim kho lub zog muab tso rau hauv kev siv.
Formic acid yog neutralized nrog hydrated txiv qaub los tsim calcium formate, thiab kev lag luam calcium formate yog tau los ntawm refining. Sodium formate thiab calcium nitrate tau dhau los ua cov tshuaj tiv thaiv ob zaug nyob rau hauv lub xub ntiag ntawm catalyst kom tau txais calcium formate thiab co-ua sodium nitrate. Kev lag luam calcium formate tau los ntawm kev ua kom zoo.
Hauv cov txheej txheem ntawm pentaerythritol ntau lawm, calcium hydroxide yog siv los muab cov kev mob tshwm sim yooj yim, thiab calcium formate yog tsim los ntawm kev ntxiv formic acid thiab calcium hydroxide hauv cov txheej txheem ntawm neutralization.
Anhydrous formic acid tuaj yeem tau los ntawm kev sib xyaw formic acid nrog phosphorus pentoxide thiab distillation nyob rau hauv qhov txo qis, rov ua dua 5 mus rau 10 zaug, tab sis tus nqi qis thiab siv sij hawm, uas yuav ua rau qee qhov decomposition. Lub distillation ntawm formic acid thiab boric acid yog yooj yim thiab zoo. Lub boric acid yog lub cev qhuav dej ntawm qhov nruab nrab kub kom txog thaum nws tsis tsim npuas, thiab qhov tshwm sim yaj yog nchuav rau ntawm ib daim ntawv hlau, txias hauv lub tshuab ziab khaub ncaws, thiab tom qab ntawd hauv cov hmoov av.
Cov hmoov nplua borate phenol tau ntxiv rau formic acid thiab muab tso rau ob peb hnub los ua ib qho nyuaj. Cov kua ntshiab raug muab cais rau lub tshuab nqus tsev distillation thiab qhov distillation ntawm 22-25 ℃ / 12-18 mm tau sau ua cov khoom. Qhov tseem yuav tsum tau ua tiav hauv av sib koom ua ke thiab tiv thaiv los ntawm cov yeeb nkab kom qhuav.
Khaws rau hauv ib qho chaw txias, ventilated warehouse. Khaws kom deb ntawm hluav taws thiab cua sov. Qhov kub ntawm lub reservoir yuav tsum tsis txhob ntau tshaj 30 ℃, thiab cov txheeb ze humidity yuav tsum tsis txhob ntau tshaj 85%. Khaws lub thawv kaw. Nws yuav tsum tau muab cais los ntawm oxidizers, alkalis thiab active hlau hmoov, thiab yuav tsum tsis txhob tov. Nruab nrog cov khoom sib xws thiab qhov ntau ntawm cov khoom siv hluav taws xob. Qhov chaw cia khoom yuav tsum tau nruab nrog cov khoom siv kho mob thaum muaj xwm txheej ceev thiab cov ntaub ntawv ntim khoom tsim nyog.