Titanium dioxide yog dab tsi?
Cov khoom tseem ceeb ntawm titanium dioxide yog TIO2, uas yog cov xim tseem ceeb hauv cov organic uas yog cov khoom dawb lossis hmoov. Nws tsis muaj tshuaj lom, muaj qhov dawb thiab ci ntsa iab, thiab suav tias yog cov xim dawb zoo tshaj plaws rau kev txhim kho qhov dawb ntawm cov khoom. Nws yog siv dav hauv kev lag luam xws li cov txheej txheem, yas, roj hmab, ntawv, kua mem, ceramics, iav, thiab lwm yam.
Ⅰ.Daim duab qhia txog kev lag luam titanium dioxide:
（1） Cov khoom siv raw ntawm titanium dioxide muaj xws li ilmenite, titanium concentrate, rutile, thiab lwm yam;
（2） Cov dej nruab nrab yog hais txog cov khoom lag luam titanium dioxide.
(3) Qhov downstream yog daim ntawv thov ntawm titanium dioxide.Titanium dioxide yog siv dav hauv ntau qhov chaw xws li kev pleev xim, plastics, papermaking, number case, roj hmab, thiab lwm yam.
Ⅱ. Cov qauv siv lead ua ntawm titanium dioxide:
Titanium dioxide yog ib hom polymorphous compound, uas muaj peb hom crystal formations hauv xwm, uas yog anatase, rutile thiab brookite.
Ob leeg rutile thiab anatase koom nrog tetragonal crystal system, uas ruaj khov nyob rau hauv qhov kub ib txwm; brookite koom nrog orthorhombic crystal system, nrog cov qauv siv lead ua tsis ruaj khov, yog li nws muaj txiaj ntsig me ntsis hauv kev lag luam tam sim no.
Ntawm peb lub qauv, theem rutile yog qhov ruaj khov tshaj plaws. Theem Anatase yuav hloov pauv mus rau theem rutile saum 900 ° C yam tsis tau rov qab, thaum theem brookite yuav hloov pauv mus rau theem rutile saum 650 ° C yam tsis tau rov qab.
(1) Rutile theem titanium dioxide
Hauv rutile theem titanium dioxide, Ti atoms nyob hauv nruab nrab ntawm lub lattice siv lead ua, thiab rau lub atoms oxygen nyob rau ntawm cov ces kaum ntawm titanium-oxygen octahedron. Txhua octahedron txuas nrog 10 lub octahedrons nyob ib puag ncig (suav nrog yim qhov sib koom thiab ob lub npoo sib koom), thiab ob lub TiO2 molecule tsim ib lub cell.
Daim duab kos ntawm lub cell siv lead ua ntawm rutile theem titanium dioxide (sab laug)
Txoj kev sib txuas ntawm titanium oxide octahedron (sab xis)
(2) Anatase theem titanium dioxide
Hauv anatase theem titanium dioxide, txhua lub titanium-oxygen octahedron txuas nrog 8 lub octahedrons nyob ib puag ncig (4 sib koom ntug thiab 4 sib koom vertices), thiab 4 TiO2 molecules tsim ib lub cell.
Daim duab kos ntawm lub cell siv lead ua ntawm rutile theem titanium dioxide (sab laug)
Txoj kev sib txuas ntawm titanium oxide octahedron (sab xis)
Ⅲ. Cov Txheej Txheem Npaj ntawm Titanium Dioxide:
Cov txheej txheem tsim cov titanium dioxide feem ntau suav nrog cov txheej txheem sulfuric acid thiab cov txheej txheem chlorination.
(1) Cov txheej txheem sulfuric acid
Cov txheej txheem sulfuric acid ntawm titanium dioxide tsim tawm suav nrog cov tshuaj acidolysis ntawm titanium hlau hmoov nrog concentrated sulfuric acid los tsim titanium sulfate, uas tom qab ntawd hydrolyzed los tsim metatitanic acid. Tom qab calcination thiab crushing, cov khoom titanium dioxide tau txais. Txoj kev no tuaj yeem tsim anatase thiab rutile titanium dioxide.
(2) Cov txheej txheem chlorine
Cov txheej txheem chlorination ntawm titanium dioxide tsim tawm suav nrog kev sib xyaw rutile lossis high-titanium slag hmoov nrog coke thiab tom qab ntawd ua chlorination kub siab los tsim titanium tetrachloride. Tom qab oxidation kub siab, cov khoom titanium dioxide tau txais los ntawm kev lim dej, ntxuav dej, ziab, thiab tsoo. Cov txheej txheem chlorination ntawm titanium dioxide tsim tawm tsuas yog tuaj yeem tsim cov khoom rutile.
Yuav ua li cas thiaj paub qhov tseeb ntawm titanium dioxide?
I. Cov Txheej Txheem Siv Lub Cev:
（1)Txoj kev yooj yim tshaj plaws yog los sib piv cov qauv los ntawm kev kov. Titanium dioxide cuav zoo li du thiab zoo li ntxhib dua, thaum Titanium dioxide tiag tiag zoo li ntxhib dua.
（2)Yog koj muab titanium dioxide rau ntawm koj txhais tes ces ntxuav tau yooj yim, tiam sis ntxuav tau tiag tiag tsis yooj yim.
（3)Muab ib khob dej huv thiab muab titanium dioxide tso rau hauv. Tus uas ntab rau saum npoo yog tus tiag, thaum tus uas poob rau hauv qab yog tus cuav (txoj kev no yuav tsis ua haujlwm rau cov khoom ua kom muaj zog lossis cov khoom hloov kho).
（4)Xyuas seb nws yaj tau hauv dej li cas. Feem ntau, titanium dioxide yaj tau hauv dej (tshwj tsis yog titanium dioxide uas tsim tshwj xeeb rau cov yas, kua mem, thiab qee cov titanium dioxide tsim, uas tsis yaj hauv dej).
II. Cov txheej txheem tshuaj lom neeg:
(1) Yog tias ntxiv cov hmoov calcium: Ntxiv cov hydrochloric acid yuav ua rau muaj kev cuam tshuam loj heev nrog lub suab squeaking, nrog rau kev tsim cov npuas ntau heev (vim tias calcium carbonate cuam tshuam nrog cov kua qaub los tsim cov pa roj carbon dioxide).
(2) Yog tias ntxiv lithopone: Ntxiv cov kua qaub sulfuric lossis hydrochloric acid yuav ua rau muaj ntxhiab qe lwj.
(3) Yog tias cov qauv yog hydrophobic, ntxiv hydrochloric acid yuav tsis ua rau muaj kev tsis haum. Txawm li cas los xij, tom qab ntub nws nrog ethanol thiab tom qab ntawd ntxiv hydrochloric acid, yog tias muaj npuas, nws ua pov thawj tias cov qauv muaj cov hmoov calcium carbonate coated.
III. Kuj tseem muaj ob txoj kev zoo ntxiv:
(1) Los ntawm kev siv cov mis tib yam ntawm PP + 30% GF + 5% PP-G-MAH + 0.5% titanium dioxide hmoov, qhov qis dua lub zog ntawm cov khoom tshwm sim yog, qhov tseeb dua ntawm titanium dioxide (rutile) yog.
(2) Xaiv cov khoom siv pob tshab, xws li ABS pob tshab uas muaj 0.5% titanium dioxide hmoov ntxiv rau. Ntsuas nws qhov kev xa tawm lub teeb. Qhov kev xa tawm lub teeb qis dua, qhov tseeb dua ntawm titanium dioxide hmoov.
Lub sijhawm tshaj tawm: Tsib Hlis-31-2024
