Isicelo se-aluminium hydroxide

Igama elithi “chemical alumina” libhekisa kwimveliso ye-aluminium ingot ngaphandle kwe-alumina, i-aluminium oxide kunye ne-aluminium hydroxide differentiated products okanye iimveliso ezinde. Kukho amakhulu eentlobo ngeentlobo ze-chemical alumina, kwaye inoluhlu olubanzi lwezicelo kwiindawo ezahlukeneyo. Eli nqaku liza kwazisa ngezicelo ezinxulumene ne-aluminium hydroxide.

I-aluminium hydroxide, ekwaziwa ngokuba yi-hydrated alumina, i-hydrous alumina, i-alumina hydrate, yinxalenye eqhelekileyo ye-amphoteric, enyibilikayo kwii-asidi kunye neziseko, enganyibilikiyo emanzini nase-alcohol. Ifomyula eqhelekileyo yi-Al2O3 • H2O eneqondo lokunyibilika elingama-300 (ukulahleka kwamanzi). Ngokwesiqulatho sayo samanzi, uthotho lwe-aluminium hydroxide lunokwahlulwa lube: i-alumina trihydrate, i-alumina monohydrate, i-aluminium crystallinity ephantsi kunye ne-amorphous aluminium hydroxide. Ithathwe kwi-bauxite, inokwenziwa ngetyuwa ye-aluminium kunye ne-sodium hydroxide ngamanzi e-ammonia. Kukho iintlobo ezimbini ze-crystalline kunye ne-amorphous (ijeli).

I-aluminium hydroxide e-Amorphous ine-alkali ephantsi, isinyithi esiphantsi, amasuntswana amancinci, kunye nomhlophe ophezulu. Imodeli yokusetyenziswa ineenzuzo zobunzima obukhulu, ukumelana nobushushu, ukumelana nokuguguleka, ukuzinza okuhle kweekhemikhali, ukungabi natyhefu, ukungabi nancasa, ukungaguquguquki, ukuphelelwa ngamanzi emzimbeni kunye nokufunxwa kobushushu xa imodeli yokusetyenziswa ishushu ukuya kuthi ga kwi-250 DEG C, kwaye inomsi olungileyo kunye nokungatshisi komlilo. Iindawo eziphambili zokusetyenziswa zezi zilandelayo.

I-aluminium hydroxide luhlobo lwe-inorganic filler ecocekileyo, umxholo wayo wokungcola uphantsi, kwaye uthotho lweepolymers ezisebenzisa i-aluminium hydroxide njenge-filling agent yi-polyurethane resin, i-epoxy resin, i-polyethylene, i-polypropylene, irabha ye-styrene butadiene, njl. njl. I-aluminium hydroxide njengesithinteli-langatye esisebenzayo kunye nesithinteli-msi isetyenzisiwe kwi-unsaturated resin kangangeminyaka emininzi.

Indlela yokuthintela ilangatye yokongeza i-ATH kwi-polymer, ukunciphisa uxinzelelo lwamafutha; i-aluminium hydroxide yaqala kwi-250 DEG C endothermic dehydration, ukuthintela ukunyuka kobushushu be-polymer; ukubola komphunga wamanzi ukuxutywa koxinzelelo lwe-oxygen, ukutsha kancinci; ekuveliseni umphezulu otshayo we-alumina kunokuthintela impendulo yokutsha ukuba iqhubeke.

I-aluminium hydroxide isetyenziswa kakhulu kushishino lokugquma kwiingubo zomphezulu, kwi-fillers, nakwiphepha elingatshiyo. I-aluminium hydroxide inokuphucula ukukhanya, ukubonakalisa, ukumelana nokukhanya, ukuguda kunye nokuprintwa kwephepha. I-aluminium hydroxide ingasetyenziswa njengezinto eziluhlaza zephepha eligqunyiweyo, kwaye i-titania iya kuthatha indawo yodongwe. Ubungakanani be-aluminium hydroxide esetyenziswa rhoqo yi-0.7-1.4 mu m.

Iphepha elithintela umlilo: elithintela ilangatye, elivuselela umlilo, kodwa alitshi. Lenziwe ngephepha le-asbestos, okanye elithintela ilangatye elinephepha elifanelekileyo (elifana ne-aluminium hydroxide) kunye nonyango.

I-aluminium hydroxide ayinabungozi kwaye ayinancasa, ayinyibiliki emanzini, luhlobo oluhle lwe-arhente yokungqubana engathathi cala, i-arhente yokungqubana yamazinyo yemveliso yemizi-mveliso ye-aluminium hydroxide. Ubulukhuni be-Mohs yi-2.5-3.5, ubunyulu obungaphezulu kwe-99%, ixabiso le-pH yi-8.0-9.5, ixabiso le-D50 yi-8-15 micron, ixabiso liphakathi, yi-arhente yokungqubana yamazinyo elungileyo, i-fluoride kunye nokuhambelana, ukusebenza kakuhle. Yenye yezona zinto zifanelekileyo zokugquma amazinyo.

I-Mullite (okanye i-mullite) luluhlu lweeminerali eziqulathe i-aluminosilicate. I-Mullite yeyona compound izinzileyo yezinto ezimbini kwinkqubo ye-Al2O3 SiO2. Olu hlobo lweminerali alunanto ingako. Luhlobo lwe-refractory esemgangathweni ophezulu, kwaye i-mullite inokwenziwa ngokufudumeza i-aluminium silicate ngokwenziwa. I-Mullite isetyenziswa kakhulu kwi-refractories, i-ceramics, i-metallurgy, i-casting, i-electronics kunye neminye imboni. Ineempawu zokumelana nobushushu obuphezulu, amandla aphezulu kunye nokuqhuba ubushushu obuncinci.

Ukongeza, i-aluminium hydroxide ingasetyenziswa njengemabula yokwenziwa, i-agate yokwenziwa, i-carpet filler; ukuveliswa kwe-aluminium sulfate, i-alum, i-alumina, i-hydrated alumina, iimveliso zerabha zezinto zeekhemikhali ze-sodium aluminate; i-flame retardant; isetyenziswa njenge-filler kunye nezongezo zezinto zokuncamathelisa kunye nezitywini; i-synthetic molecular seeve; ye-gastricantiacids njl.njl.

Uhlobo lwejeli ye-aluminium hydroxide yi-Aluminium Hydroxide Gel, i-boehmite, i-amorphous alumina. Ine-adhesive elungileyo, i-molding, i-resistance ephezulu kubushushu, i-thermal conductivity ephantsi, i-corrosion elungileyo kunye ne-oxidation, inamandla aphezulu kunye nomphezulu ogudileyo.

I-aluminium hydroxide yenye yezona zithako ziphambili ze-gel ye-aluminium yesisu, unyango lwe-asidi yesisu kunye nesisu, amayeza emveli, amalungiselelo adibeneyo afana ne-vitamin U kunye nee-capsules ze-aluminium, iiTablets ze-Aluminium Hydroxide kunye nezinye izinto eziphambili, nazo zingasetyenziselwa izinto zonyango. Indlela esebenza ngayo i-asidi yayo yokulwa nesisu yi-Al (OH)3+6HCl=2AlCl3+3H2O. I-alumina yamanzi amathandathu eyenziwe nge-aluminium hydroxide ingasetyenziswa njenge-arhente ye-gelling kwicandelo lezonyango kunye nezinto zokuthambisa.

Unyango lomphezulu kunye ne-adhesive adhesive. Ukusetyenziswa kwejeli ye-Aluminium Hydroxide kungenziwa ngefayibha engaphiliyo okanye yendalo, kusetyenziswa ukumelana kwayo nobushushu obuphezulu kunye nokugqitywa komphezulu, kusetyenziswa kakhulu ekwenzeni izixhobo zeseramikhi ezikumgangatho ophezulu, zikwasetyenziselwa ukuvelisa i-porcelain yombane; kwangaxeshanye ikwayi-inorganic filler.