Calcium formate is an organic substance with the molecular formula of c2h2o4ca. It is white crystal or powder, slightly hygroscopic and slightly bitter. Neutral, non-toxic, soluble in water. The aqueous solution is neutral. The solubility of calcium formate changes little with the increase of temperature, 16g/100g water at 0 ℃ and 18.4g/100g water at 100 ℃. Specific gravity: 2.023 (20 ℃), bulk density 900-1000g / L. Heating decomposition temperature >400 degree. Raws li pub additive, nws yog haum rau txhua yam tsiaj thiab muaj cov teebmeem ntawm acidification, mildew tiv thaiv, antibacterial, thiab lwm yam nyob rau hauv kev lag luam, nws kuj yog siv los ua ib tug pob zeb, mortar additive, tawv tanning los yog raws li ib tug preservative.
Txoj hauv kev tseem ceeb ntawm kev tsim cov calcium formate yog siv cov kua qaub formic acid los ua cov tshuaj calcium carbonate los yog calcium hydroxide los tsim cov tshuaj calcium formate, uas yog lim kom tshem tawm cov tshuaj insoluble. Cov filtrate yog concentrated, crystallized, centrifuged thiab qhuav los tsim cov khoom calcium formate, thiab niam cawv yog siv dua.
Lub hauv paus ntsiab lus ntawm cov tshuaj tiv thaiv: vim tias cov acidity ntawm formic acid muaj zog dua li ntawm carbonic acid, formic acid tuaj yeem cuam tshuam ncaj qha nrog calcium carbonate los tsim calcium formate. Nws cov qauv tshuaj tiv thaiv yog:
Cov khoom zoo yog zoo heev, thiab cov ntsiab lus ntawm cov dej insoluble teeb meem nyob rau hauv cov khoom yog tsawg; Qhov tsis zoo uas twb muaj lawm yog kev siv cov txheej txheem evaporative crystallization ntau lawm, uas yog complex, siab zog noj, siab ntau lawm nqi thiab tsawg efficiency. Nyob rau hauv no hais txog, peb tau tsim ib tug quicksand calcium formate ntau lawm technology, uas ncaj qha siv formic acid thiab calcium carbonate raws li lub ntsiab raw cov ntaub ntawv los ua ke ib qho zoo tagnrho quicksand calcium formate khoom nyob rau hauv ib kauj ruam. Qhov zoo ntawm cov tshuab no yog cov txheej txheem luv luv, kev ua haujlwm yooj yim, kev siv hluav taws xob tsawg, kev nqis peev me me thiab cov nqi tsim khoom tsawg. Cov khoom yog dawb thiab zoo ntws zoo li sai sai sand crystalline hais nrog siab purity thiab zoo.
Kev siv tseem ceeb ntawm calcium formate:
1. Siv hauv kev tsim kho. Nws yog siv los ua tus neeg sawv cev ceev ceev, lubricant thiab thaum ntxov zog tus neeg sawv cev ntawm cov cement. Nws yog siv rau hauv kev tsim kho mortar thiab txhua yam ntawm cov pob zeb ua kom nrawm nrawm ntawm cov cement thiab ua kom lub sij hawm luv. Tshwj xeeb tshaj yog nyob rau hauv lub caij ntuj no kev tsim kho, nws muaj peev xwm zam dhau qeeb qhov chaw ceev nyob rau hauv qis kub. Demoulding yog ceev, kom cov cement tuaj yeem siv sai li sai tau. Daim ntawv thov ntawm calcium formate: txhua yam qhuav sib tov mortar, txhua yam ntawm cov pob zeb, hnav-resistant cov ntaub ntawv, flooring kev lag luam, pub kev lag luam, tanning kev lag luam. Qhov ntau npaum ntawm calcium formate thiab kev ceev faj: qhov ntau npaum li cas ntawm cov hmoov qhuav mortar thiab qhob ib tuj yog li ntawm 0.5 ~ 1.0 feem pua , thiab qhov siab tshaj plaws ntxiv yog 2.5 feem pua . Qhov ntau npaum ntawm calcium formate nce maj mam nrog qhov txo qis ntawm qhov kub thiab txias. Txawm hais tias 0.3-0.5 feem pua yog siv rau lub caij ntuj sov, nws yuav muaj qhov pom tseeb thaum ntxov zog.
2. Ua ib qho khoom noj tshiab. Pub calcium formate kom nce qhov hnyav thiab siv calcium formate raws li pub additive rau piglets tuaj yeem txhawb nqa piglets lub qab los noj mov thiab txo qhov mob raws plab. Ntxiv 1 feem pua ~ 1.5 feem pua calcium formate rau piglet noj tuaj yeem txhim kho kev ua haujlwm ntawm cov piglets weaned. Kev tshawb fawb German tau pom tias ntxiv 1.3 feem pua calcium formate rau kev noj zaub mov ntawm cov piglets weaned tuaj yeem txhim kho qhov hloov pauv hloov pauv los ntawm 7 feem pua - 8 feem pua, thiab ntxiv 0.9 feem pua tuaj yeem txo qhov mob raws plab hauv piglets. Zheng Jianhua (1994) ntxiv 1.5 feem pua calcium formate rau kev noj haus ntawm 28 hnub qub weaned piglets. Tom qab pub mis rau 25 hnub, qhov nce txhua hnub ntawm piglets nce 7.3 feem pua, qhov hloov pauv hloov pauv tau nce los ntawm 2.53 feem pua, cov protein thiab lub zog siv tau nce 10.3 feem pua thiab 9.8 feem pua, thiab raws plab ntawm piglets txo qis. Wu Tianxing (2002) ntxiv 1 feem pua calcium formate rau kev noj zaub mov ntawm ternary hybrid weaned piglets, qhov nce txhua hnub nce 3 feem pua, tus nqi hloov pauv hloov pauv tau nce 9 feem pua, thiab tus kab mob plab piglets txo los ntawm 45.7 feem pua. Lwm yam uas yuav tsum nco ntsoov: kev siv cov calcium formate ua tau zoo ua ntej thiab tom qab weaning, vim hais tias cov hydrochloric acid secreted los ntawm piglets nce nrog hnub nyoog; Calcium formate muaj 30 feem pua calcium uas yooj yim nqus. Thaum npaj pub, ua tib zoo saib xyuas qhov kev faib ua feem ntawm calcium thiab phosphorus.
Cov khoom siv raw ntawm calcium formate yog qhov cuam tshuam ncaj qha rau peb cov zaub mov kev nyab xeeb! Raws li kev txheeb xyuas ntawm calcium formate, peb txhua tus paub tias calcium formate yog dawb siv lead ua los yog hmoov, tab sis nws kuj yog daj nyob rau hauv kev ua lag luam, vim hais tias cov khoom siv raw siv tsis yog cov khoom siv raw, uas yog, feem ntau hu ua los ntawm - khoom. Muaj ntau yam impurities nyob rau hauv hom raw cov ntaub ntawv, thiab tsis tas yuav tsum tau rau hnyav hlau. Nrog rau txoj kev loj hlob ntawm cov tsiaj txhu thiab kev ua siab zoo rau kev tiv thaiv ib puag ncig, txoj kev tsim khoom siv formic acid raws li cov khoom tseem ceeb muaj tsawg impurities thiab ruaj khov zoo. Qhov zoo ntawm calcium formate synthesized nrog calcium carbonate tau mus txog qib siab dua. Lwm qhov tseem ceeb ntawm calcium formate siv nyob rau hauv pub yog calcium cov ntsiab lus, uas feem ntau yog ntau dua los yog sib npaug li 30 feem pua. Ib txwm tsiaj calcium ntxiv yog siv pob zeb hmoov. Txawm hais tias nws tseem tuaj yeem ua lub luag haujlwm hauv calcium ntxiv, kev siv lub sijhawm ntev ntawm cov hmoov pob zeb yuav cuam tshuam rau kev zom zaub mov thiab kev nqus cov as-ham los ntawm cov tsiaj nyeg thiab nqaij qaib, thiab txawm tias tsim o, ua rau cov kua qaub ntau hauv cov hnyuv yuav neutralized. , indirectly ua rau raws plab nyob rau hauv piglets, thiab loj pob zeb. Raws li ib yam tshiab ntawm cov tsiaj pub additive, pub qib calcium formate txawv ntawm cov calcium uas siv hauv cov khoom noj dhau los. Nws tsis xav tau kev koom tes ntawm gastric acid nyob rau hauv cov txheej txheem ntawm kev sib cais ntawm cov tsiaj, thiab tus nqi nqus tau zoo dua li yav dhau los. Nws tuaj yeem siv rau hauv cov tsiaj hluas uas tsis muaj kev ua haujlwm ntawm plab hnyuv, thiab feem ntau tuaj yeem paub txog kev hloov cov calcium formate thiab pob zeb hmoov. Thaum siv calcium formate, lwm yam yuav raug coj mus rau hauv tus account rau kev siv sib txawv. Pub qib calcium formate yuav coj mus rau hauv tus account cov ntsiab lus ntawm cov hlau hnyav, dej solubility thiab lwm yam teeb meem. Txhawm rau ua lub luag haujlwm zoo hauv lub cev tsiaj, pub calcium formate yuav tsum tau txiav txim siab los ntawm qhov tseem ceeb ntawm cov khoom siv raw.