Qhov sib txawv tseem ceeb ntawm quicklime thiab hydrated txiv qaub yog tias cov kua qaub sai (los yog cov txiv qaub hlawv) muaj calcium oxide whereas cov txiv qaub hydrated (slaked txiv qaub) muaj calcium hydroxide.
Qhov tseem ceeb rau ob qho tib si quicklime thiab hydrated txiv qaub yog limestone. Yog li ntawd, zoo li limestone, cov tebchaw no kuj alkaline. Peb hu quicklime li "burnt txiv qaub" vim peb tsim nws los ntawm thermal decomposition ntawm limestone. Peb hu ua hydrated txiv qaub li "slaked txiv qaub" vim peb tsim nws los ntawm quenching quicklime nrog dej.
Quicklime yog dab tsi?
Quicklime yog calcium oxide. Peb tsim nws los ntawm thermal decomposition ntawm limestone. Yog li ntawd, peb hu nws "burnt txiv qaub". Limestone muaj calcium carbonate. Peb hlawv cov khoom no kom siab tshaj 825 ° C. peb hu cov txheej txheem no "calcination". Nws liberates carbon dioxide tsim quicklime. Cov khoom no kuj pheej yig.
Cov tshuaj formula ntawm lub compound yog CaO. Nws qhov hnyav yog 56.07 g / mol. Nws zoo nkaus li cov hmoov dawb mus rau daj ntseg daj. Ntxiv mus, nws yog odorless. Lub melting point thiab boiling point yog 2,613 ° C thiab 2, 850 ° C raws li. Cov tshuaj no yog dej soluble heev; nws tsim calcium hydroxide. Cov qauv siv lead ua ntawm qhov sib xyaw no yog cubic.
Uss
Muaj ntau qhov kev siv ntawm qhov sib xyaw no uas suav nrog nws cov ntawv thov hauv cov txheej txheem oxygen steelmaking, hauv kev tsim cov pob zeb aerated, ua ib feem hauv kev tsim cov iav, cov tshuaj organic, thiab lwm yam. Ntxiv mus, nws yog ib qho tseem ceeb muaj nyob rau hauv ua cement.
Hydrated txiv qaub yog dab tsi?
Hydrated txiv qaub yog calcium hydroxide. Peb hu nws "slaked txiv qaub" thiab. Qhov no yog vim peb tsim calcium hydroxide ntawm quenching calcium oxide nrog dej. Ntxiv rau qhov ntawd, muaj ntau lwm cov ntsiab lus ntawm cov tshuaj no, piv txwv li caustic txiv qaub, builder's txiv qaub, slack txiv qaub, pickling txiv qaub, thiab lwm yam. Ib tug saturated tov ntawm calcium hydroxide hu ua "kua qaub dej".
Cov tshuaj formula ntawm cov tshuaj no yog Ca(OH)2. Cov molar mass ntawm no compound yog 74.09 g / mol. Nws zoo nkaus li cov hmoov dawb thiab tsis muaj ntxhiab tsw. Lub melting point yog 580 ° C, thiab nws decomposes raws li cua sov ntxiv (nws tso dej vapor). Txawm li cas los xij, qhov solubility ntawm qhov sib xyaw no hauv dej tsis zoo.
Daim duab 01: Kev tsim cov Quicklime thiab Slaked txiv qaub (Hydrated txiv qaub)
Hydrate txiv qaub yog muaj nyob rau hauv cov hmoov los yog granules. Txawm li cas los xij, cov khoom kawg tau muab los ntawm cov txheej txheem tsim khoom zoo li cov hmoov qhuav, zoo li hmoov nplej uas muaj lub teeb (feem ntau yog xim dawb). Kev siv cov tshuaj no yog nyob rau hauv flue gas kho, neutralizing industrial wastewater, thiab lwm yam.
Qhov txawv ntawm Quicklime thiab Hydrated txiv qaub yog dab tsi?
Quicklime yog calcium oxide nrog cov tshuaj formula CaO whereas, hydrated txiv qaub yog calcium hydroxide nrog cov tshuaj formula Ca(OH)2. Qhov no yog qhov sib txawv tseem ceeb ntawm quicklime thiab hydrated txiv qaub. Tsis tas li ntawd, molar loj ntawm quicklime yog 56.07 g / mol thaum molar loj ntawm hydrated txiv qaub yog 74.09 g / mol. Ntxiv mus, lub melting point thiab boiling point ntawm quicklime yog 2, 613 ° C thiab 2, 850 ° C feem, whereas lub melting point ntawm hydrated txiv qaub yog 580 ° C, thiab nws tsis muaj boiling point vim nws decomposes raws li cua sov ntxiv (nws tso tawm. dej vapor). Tsis tas li ntawd, muaj ntau yam kev siv ntawm ob lub tebchaw. Quicklime yog qhov tseem ceeb hauv cov txheej txheem oxygen steelmaking, hauv kev tsim cov pob zeb aerated, ua ib feem hauv kev tsim cov iav, cov tshuaj organic, thiab lwm yam.thaum hydrated txiv qaub yog pab tau rau hauv flue gas kho, neutralizing industrial khib nyiab thiab lwm yam.
Cov hauv qab no nthuav tawm cov ntsiab lus ntxiv ntawm qhov sib txawv ntawm quicklime thiab hydrated txiv qaub nyob rau hauv daim ntawv tabular.
Summary – Quicklime vs Hydrated txiv qaub
Peb tsim cov kua qaub los ntawm limestone thiab hydrated txiv qaub los ntawm quicklime. Qhov sib txawv tseem ceeb ntawm quicklime thiab hydrated txiv qaub yog tias quicklime muaj calcium oxide whereas cov txiv qaub hydrated muaj calcium hydroxide.
