Kumvetsetsa Aluminiyamu Hydroxide: Katundu, Kupanga, ndi Ntchito

1. Mawu Oyamba

Aluminiyamu Hydroxide, yomwe imaimiridwa ndi mankhwala monga Al(OH) 3, ndi imodzi mwazinthu zosunthika, zofalikira, komanso zamafakitale ofunikira kwambiri pachuma chamakono padziko lonse lapansi. Ngakhale poyamba zingamveke ngati mankhwala apadera a labotale kapena mchere wosadziwika bwino kwa osadziwa, zimagwira ntchito yofunika kwambiri m'mafakitale osiyanasiyana. Magawowa amayambira pakupanga mankhwala otsogola, uinjiniya wa polima, ndi kasamalidwe ka chilengedwe mpaka pamankhwala, chithandizo chamadzi, ndi zinthu zogula tsiku ndi tsiku. Kusakhazikika kwake kwamankhwala, machitidwe ochititsa chidwi a amphoteric, ndi zinthu zabwino kwambiri zoyaka moto-zimapangitsa kuti ikhale mwala wapangodya m'maketani angapo apadziko lonse lapansi, kukhudza chilichonse kuyambira pachitetezo chanyumba mpaka thanzi la anthu.

Kuti timvetse kufunika koona komanso kukula kwa Aluminium Hydroxide kumafuna kuyang'ana mwatsatanetsatane,-pambali zambiri za momwe mamolekyu ake amakhudzira machitidwe ake pokonza mafakitale ndi ntchito zamalonda za tsiku ndi tsiku. Kuyambira pomwe idapangidwa kuchokera ku Earth kudzera muzovuta komanso mphamvu-njira yozama kwambiri ya Bayer mpaka kutumizidwa kwake ngati njira yothandiza yozimitsa moto-yochezeka yozimitsa moto mumagetsi amakono komanso moyo-wopulumutsa mankhwala amankhwala amakono, mankhwalawa amakhudza pafupifupi gawo lililonse lachitukuko chamakono. Nkhaniyi ikufotokoza za mankhwala, njira zomwe zakhazikitsidwa komanso zomwe zikubwera, komanso njira zambiri zomwe zimathandizira kuti Aluminium Hydroxide ikhale yokhazikika pazachuma komanso luso laukadaulo pamakampani apadziko lonse lapansi, kuwunikira mbiri yake, zomwe zikuchitika masiku ano m'mafakitale, komanso momwe zinthu zikuyendera m'tsogolomu{6}}zokayikitsa kwambiri zaukadaulo.

2. Chemical and Physical Properties of Aluminium Hydrooxide

Kapangidwe ka Chemical ndi Amphoteric Nature

Pamulingo wa mamolekyu, Aluminium Hydroxide imakhala ndi aluminiyamu imodzi yapakati yolumikizira yolumikizidwa mwamphamvu ndi ma anion atatu ozungulira a hydroxide, zomwe zimapangitsa -mankhwala odziwika bwino a Al(OH)3. Chimodzi mwazinthu zodziwika bwino komanso zochititsa chidwi mwasayansi zama mankhwala ndi chikhalidwe chake cha amphoteric. Izi zikutanthauza kuti mankhwalawa amatha kuchitapo kanthu ngati asidi ofooka komanso maziko ofooka kutengera chilengedwe chamankhwala komanso pH ya sing'anga yozungulira. Akakumana ndi zidulo zolimba, monga hydrochloric acid kapena sulfuric acid, Aluminium Hydroxide imasungunuka mosavuta kupanga mchere wa aluminiyamu wosungunuka ndi madzi. Mosiyana ndi zimenezi, ikakhala ndi maziko amphamvu monga sodium hydroxide, imakhudzidwa ndi kupanga ma aluminates osungunuka, monga sodium tetrahydroxoaluminate. Izi wapawiri mankhwala reactivity si chidwi chidwi ophunzitsidwa m'makalasi; ndi makina ofunikira a thermodynamic omwe amalola kuti ayengedwe kuchokera ku miyala yamtengo wapatali ya bauxite panthawi yokonza mankhwala a mafakitale ndikugwiritsidwa ntchito m'magulu osiyanasiyana apadera a mankhwala.

Maonekedwe Athupi ndi Zochitika Zachilengedwe

Mu mawonekedwe ake oyera, oyengedwa bwino, Aluminium Hydroxide imawoneka ngati yabwino, yoyera, yopanda fungo, yopanda kukoma, ufa wa amorphous kapena ngati kristalo wokhazikika. Ndiwosasungunuka m'madzi ndi zosungunulira wamba m'malo osalowerera ndale, chinthu chofunikira kwambiri chomwe chimaupangitsa kukhala otetezeka kuzinthu zambiri zam'mutu komanso mkati momwe mayamwidwe adongosolo ayenera kuyendetsedwa mwamphamvu kapena kupewedwa palimodzi. Mwachilengedwe, Aluminium Hydroxide imapezeka m'mitundu ingapo yamchere, makamaka ngati gibbsite, pamodzi ndi ma polymorphs ake osowa kwambiri monga bayerite, nordstrandite, ndi doyleite. Gibbsite ndi yochuluka kwambiri ndipo imagwira ntchito ngati chigawo chachikulu cha bauxite, chomwe ndi chitsulo chachikulu cha malonda padziko lonse lapansi pakupanga zitsulo za aluminiyamu ndi aluminium mankhwala. Kuphatikiza apo, Aluminium Hydroxide imawonetsa kukhazikika kwamafuta mpaka kutentha kwina. Ikatenthedwa kupitilira pafupifupi madigiri 200 Celsius, imasintha kwambiri, ndikutulutsa mamolekyu ake am'madzi omangidwa ndi mankhwala mwamphamvu kwambiri. Kachitidwe ka thermodynamic kameneka kamapanga maziko asayansi ogwiritsiridwa ntchito kwambiri ngati njira yochepetsera malawi muzinthu zamakono zopangira.

3. Njira Zopangira Mafakitale

Njira ya Bayer: Maziko

Zambiri zamalonda za Aluminium Hydroxide zomwe zimapangidwa padziko lonse lapansi zimapangidwa kudzera mu njira ya Bayer, njira yayikulu yoyenga mankhwala yomwe idapangidwa chakumapeto kwa zaka za m'ma 1900 yomwe imagwirabe ntchito ngati msana wamakampani a aluminiyamu padziko lonse lapansi. Ntchitoyi imayamba ndi bauxite, dongo lodetsedwa-ngati zitsulo zokhala ndi ma aluminiyamu oxide ndi ma hydroxide osakanikirana kwambiri ndi iron oxides, silica, ndi titanium dioxide. Bauxite yaiwisi, yophwanyidwa imayikidwa m'mimba pansi pa kupanikizika kwakukulu komanso kutentha kwakukulu mu njira yamadzimadzi ya sodium hydroxide, yomwe nthawi zambiri imatchedwa caustic soda. Njira yovutayi yogayitsa chakudya imasungunula aluminiyumuyo{4}}yokhala ndi magawo a mchere, kuphatikizapo gibbsite, boehmite, ndi diaspore, kupanga madzi amadzimadzi a aluminiyamu ya sodium aluminiyamu ya supersaturated kwinaku akusiya zinyalala zosasungunuka ngati zinyalala zolimba zotchedwa red mud kapena bauxite residue.

Kuyeretsa ndi Kugwa

Zonyansa zolimbazi zikasiyanitsidwa bwino ndi makina osungunuka, kumveketsa bwino, ndi makina otsogola-osefera masitepe ambiri, mowa wowoneka bwino, woyeretsedwa wa sodium aluminiyumu umatsitsidwa pansi pamikhalidwe yabwino. Kenako imabzalidwa ndi makhiristo abwino kwambiri, osawoneka bwino a Aluminium Hydroxide opangidwa kale kuti ayambitse kristalo. Kubzala uku kumayambitsa kugwa kwamvula kolamulirika kwambiri, zomwe zimapangitsa kuti aluminiyamu yosungunukayo isungunuke muzitsulo zodzaza kwambiri{3}}zoyera za Aluminium Hydroxide trihydrate. Makhiristo omwe adakhalapo amatsukidwa bwino ndi madzi oyera kuti achotse chotsalira chilichonse cha caustic soda, amasefedwanso, ndikuwumitsa kuti afotokoze. Kutengera ndi zomwe opanga kumunsi agwiritse ntchito, zinthuzo zitha kugulitsidwa ngati -zoyera kwambiri za hydrate kapena zotenthedwa kwambiri{7}}zotenthetsera m'makina otenthetsera kuti zichotseretu madzi, kupanga zida zapadera za alumina zomwe zimagwiritsidwa ntchito muzoumba zaukadaulo zapamwamba, zotayira, ndi aluminiyamu zitsulo.

4. Ntchito Zosiyanasiyana za Aluminiyamu Hydrooxide

Zoletsa Moto ndi Zopondereza Utsi

Chimodzi mwazinthu zazikulu kwambiri, zofunika kwambiri pazachuma, komanso zachangu kwambiri-zogwiritsa ntchito mafakitale a Aluminium Hydroxide zomwe zikuchulukirachulukira ndikugwiritsa ntchito kwambiri-popanda mphamvu yoletsa malawi a halogenated komanso kupondereza utsi pama polima, mapulasitiki opangidwa, ma elastomer, ndi zinthu za raba. Zinthu zopangidwa zomwe zimakhala ndi Aluminiyamu Hydroxide zodzaza kwambiri zimatenthedwa mwangozi kapena kuyaka moto, gululi limakumana ndi kuwonongeka kwa endothermic. Mwa kuyamwa mphamvu zambiri zotentha kuchokera mulawi lomwe likupita patsogolo, izi zimaziziritsa matrix a polima ndikuchepetsa kuyaka kwake. Panthawi imodzimodziyo, kuwonongeka kwa mankhwala kumatulutsa nthunzi wamadzi, umene umasungunula mpweya woyaka wa pyrolytic mumpweya wozungulira ndipo umapanga chinsalu chowundana, choteteza,-chosayaka cha ceramic pamwamba pa polima. Chifukwa sichitulutsa mpweya woipa wa halogenated kapena utsi wowononga ikatenthedwa, Aluminium Hydroxide imakondedwa kwambiri kuti ikhale yotetezeka-zofunika kwambiri monga kutsekereza mawaya amagetsi, m'kati mwazoyendera za anthu onse, mapanelo omangira, ndi nyumba zokhala ndi zida zamagetsi.

Kugwiritsa Ntchito Mankhwala ndi Pachipatala

Kupitilira mafakitale olemera ndi uinjiniya wa polima, Aluminium Hydroxide imagwira ntchito yofunika kwambiri pazachipatala ndi zamankhwala. Ndi nthawi-yoyesedwa,{2}}yomwe yakhazikitsidwa bwino ngati mankhwala oletsa asidi kuti achepetse asidi ochuluka m'mimba, kupereka mpumulo wachangu komanso wodalirika ku kutentha kwapamtima, kusagawika m'mimba, ndi acid reflux. Pochita mankhwala ndi chapamimba hydrochloric acid m'mimba, imakweza bwino pH ya m'mimba ndikupanga zokutira zoziziritsa, zoteteza pamimba yomwe yakwiya. Kuphatikiza apo, Aluminium Hydroxide nthawi zambiri amaperekedwa ndi madokotala kwa odwala omwe ali ndi matenda a impso kuti athe kuthana ndi hyperphosphatemia. Imakwaniritsa izi pomanga phosphorous m'zakudya molunjika m'matumbo am'mimba, potero amalepheretsa kuyamwa kwake m'magazi komwe kungayambitse zovuta zamtima ndi chigoba. Kupitilira pakamwa izi, ma Aluminium Hydroxide oyeretsedwa kwambiri, apadera amagwiritsidwa ntchito ngati chothandizira pamatemera osiyanasiyana amunthu ndi anyama, komwe kumawonjezera ndikutalikitsa kuyankha kwa chitetezo chamthupi ku ma antigen.

Chithandizo cha Madzi ndi Chemical Precursor

Uinjiniya wa zachilengedwe ndi zomangamanga zamatauni zimadaliranso kwambiri Aluminium Hydroxide ndi zotuluka zake zamakhemikolo kuti aziyeretsa-pamlingo waukulu. Ngakhale ma coagulants oyambira ngati aluminium sulfate kapena polyaluminium chloride nthawi zambiri amawonjezedwa mwachindunji ku magwero amadzi amadzi amadzimadzi, Aluminiyamu Hydroxide imayenda mwachilengedwe komanso imapanga mwachangu pakusintha kwa pH ndi kuwunikira kotsatira. Ma gelatinous flocs awa amakhala ngati ma flocculants apadera, amatchera ndikuchotsa zolimba zoyimitsidwa, zinthu zachilengedwe, tizilombo tating'onoting'ono, ndi ayoni achitsulo cholemera kuchokera ku mitsinje yamadzi onyansa asanatulutsidwe m'chilengedwe kapena kuthiridwa madzi akumwa. Kuphatikiza apo, Aluminium Hydroxide imagwira ntchito ngati kalambulabwalo wamankhwala wofunikira kwambiri popanga mitundu yambiri yamankhwala apadera a aluminiyamu. Amagwiritsidwa ntchito ngati zoyambira poyambira kupanga zeolite zopangira petrochemical catalysis, magalasi apadera owoneka bwino, zokutira zamapepala zazitali-, ndi zomatira zamafakitale, zomwe zikuwonetsa kusinthasintha kwake ngati chipika chomangira mankhwala.

5. Zachilengedwe, Chitetezo, ndi Chiyembekezo chamtsogolo

Mbiri Zachitetezo ndi Njira Zopewera

Ngakhale kuti Aluminiyamu Hydroxide imadziwika kuti ndi yotetezeka kwa ogula ikagwiritsidwa ntchito popanga mankhwala, chakudya-zinthu zolumikizirana, ndi zinthu zapakhomo, kupanga mafakitale ndi kasamalidwe kakulu-kumafuna malamulo okhwima otetezedwa ndi kusamala pantchito. Kukoka mpweya wabwino wa Aluminiyamu Hydroxide fumbi lomwe limapangidwa panthawi ya mphero, matumba, kapena polima kuphatikizira kungayambitse kupsa mtima kwamakina am'mwamba ndi m'mapapo. Chifukwa chake, malo amakono opangira mafakitole amagwiritsa ntchito makina otsogola kwambiri a m'deralo,{4}}njira zosonkhanitsira fumbi zogwira mtima kwambiri, ndi zida zodzitetezera, monga zopumira, magalasi otetezedwa, ndi magolovesi oteteza, kuteteza thanzi la ogwira ntchito. Malinga ndi mmene chilengedwe chimaonera zinthu zachilengedwe, malowa sasungunuke m'madzi m'malo abwinobwino a chilengedwe, zomwe zimachepetsa zoopsa zazamoyo zam'madzi, ngakhale kuchulukana kwanthawi yayitali-ndi maphunziro a chemistry m'nthaka akupitilizabe kutsogolera malamulo otulutsira m'mafakitale ndi kuyang'anira chilengedwe padziko lonse lapansi.

Zokhudza Zachilengedwe ndi Kupititsa patsogolo Zaukadaulo

Kupanga Aluminiyamu Hydroxide pogwiritsa ntchito njira yachikhalidwe ya Bayer ndiyomwe imakhala ndi mphamvu-ndi mphamvu zambiri ndipo imapanga zotsalira zambiri za bauxite, zomwe zimabweretsa kusamalidwa kosalekeza kwa chilengedwe ndi zovuta zogwiritsa ntchito malo{1}}pamakampani. Kafukufuku wamakono wamakampani ndi uinjiniya amayang'ana kwambiri kuwongolera mphamvu zowongoleredwa bwino za digestion autoclaves ndi ma calcination kilns, komanso kupanga{3}}njira zotsekera zobwezeretsanso aluminiyamu{4}}zokhala ndi zinyalala zamafakitale. Panthawi imodzimodziyo, asayansi otsogola ndi zinthu zaumisiri-kagawo kakugawa, mawonekedwe abwino, ndi pamwamba-zosinthidwa magiredi a Aluminium Hydroxide kuti apititse patsogolo kufalikira ndi kugwilizana ndi zinthu zapamwamba zophatikizika. Zaumisiri zimenezi zimathandiza kuti ma filler achulukidwe m'mapangidwe ovuta a polima popanda kusokoneza mphamvu zamakina kapena kukana kukhudzidwa, kukankhira malire a machitidwe a eco-ochezeka ndi ozimitsa moto{10}}ndikukwaniritsa zofunikira zomwe makampani apadziko lonse amtsogolo azifuna.

6. Mapeto

Aluminiyamu Hydroxide, yoyimiridwa mwasayansi ndi njira yamankhwala Al(OH)3, ndi yoposa mphamvu yamankhwala kapena mchere wamba; ndi mzati woyambira wa sayansi ya zinthu zamakono, uinjiniya wamankhwala, ndi kupanga. Kuphatikiza kwake kwapadera, kopindulitsa kwambiri kwa amphoteric chemical reactivity, kukhazikika kwamafuta ambiri, komanso kawopsedwe kakang'ono kamene kamapangitsa kuti zisalowe m'malo mosiyanasiyana mosiyanasiyana. Kuchokera pakupulumutsa miyoyo ya anthu kudzera muzamankhwala apamwamba komanso kuteteza zomangamanga za anthu pogwiritsa ntchito mphamvu yamoto kuti iwonetsetse kuti madzi akumwa aukhondo komanso opatsa mphamvu kaphatikizidwe ka mankhwala opangidwa ndi mafakitale, Aluminium Hydroxide ikupitiliza kuwonetsa zofunikira komanso phindu lachuma. Pamene matekinoloje opangira zinthu padziko lonse lapansi akusintha komanso kukhazikika kwa chilengedwe kukuchulukirachulukira pakupanga mafakitale, kafukufuku wopitilira wasayansi, kukhathamiritsa kwazinthu, ndi njira zopangira zinthu zobiriwira ziwonetsetsa kuti Aluminium Hydroxide ikugwirabe ntchito yofunikira pakukwaniritsa zofunikira zamakampani apadziko lonse lapansi mawa.