DAI HOC QUOC GIA HA NOl T R U O N G DAI H O C K H O A H O C TL/NHIEN BAG CAO KET QUA DE TAI NCKH '^fiH (te tai: NGmEN CUU QUA TRINH DIEU CHE BpT M A U L I T H O P O N Tl/CAC NGUON QUANG KEM VA BARITIN VIET NAM CHU TRI DE TAI: PGS TS TRINH NGOC CHAU D A ! H O C Q U O C G I A HA M O i i • p : j N G TA?/ Ti-iOV-':^ TiM THij V i R : • DT/5/iO HA NOI, 2004 L BAO CAO TOM TAT a Ten de tai: Nghien ctru qua trinh che tao bot mau lithopon tu cac nguon quang kem va baritin Viet nam Ma so: QT-02- 15 b Chu tri de tai: PGS TS Trinh Ngpc Chau Hoc vi: tien sL Dan vi cong tac: Khoa Hoa, truang DHKHTN, DHQG Ha Noi c Can bp tham gia: - GS TSVuDangdo - PGSTS Trieu thi Nguyet - HVCH Nguyen Thi Thuy Hang d Muc tieu va npi dung nghien cuu: - Mac tieu: Nghien cim qua trinh di^u che hot mau lithopon tir cac quang kem va baritin ciia Viet nam Day la sac to mau trang dugc sir dung nhieu cong nghiep son, cao su ma hien chiing ta van phai nhap ngoai - Npi dung: - Xac dinh phan ciia cac loai quang ban dau - Khao sat cac yeu to anh hucmg den qua trinh chuyen hoa BaS04 quang baritin Ha Bac BaS - Nghien ciru quy trinh thfch hgp de' dieu che dung dich ZnS04 sach tir kem oxit Tuyen Quang -Tim dieu kien toi uu cho phan ung dong ket tua lithopon tu hai dung dich BaS va ZnSO^ a tren - Xac dinh phan \a mot sd tfnh chat ciia litopon t6ng hap diroc e ket qua dat duoc: - Da nghien ctiu cac dicu kien t(5i iru \e nhict do, thai gian nung ti Ic than va quang dc khu BaSO^ quang baritin Ha Bac BaS - Da nghien cun qua trinh loai bo cac tap chat SiO AKO^ va cac kim loai nang co ZnO Tuyen Quang de' d\tu che dung dich ZnS04 sach dung cho viec didu che lithopon - Da nghien cuu anh huong cua ti le so moi BaS : ZnS04 va pH den qua trinh dong ket tua de thu dugc bot mau lithopon - Da xac dinh phan va mot so tfnh chat ciia litopon tdng hap duac bang cac phuang phap vat If va hoa li khac - Tu cac ket qua nghien cuu da de xuat qui trinh dieu che bot mau lithopon tii loai quang noi tren De tdi dd gap phdn dao tgo: 01 Luan van thac sT 03 Khoa luan tot nghiep f Tinh hinh su dung kinh phi + Tong kinh phf dugc cap: 20,0 trieu dong + T6ng kinh phf thuc chi: 20,0 trieu dong Hd Noi, ngdy 26 thdng 12 nam 2004 KHOA HOA HOC PGS TS Trdn Thi Nhir Mai DAI HOC QG HA NOI CHU TRI DE TAI PGS TS Trinh Ngpc Chau TRU(^NG-©AI HOC HKHTN P^SJ^.tOulC^uJ^^ '^VTfV SUMMARY REPORT a Reasearching Project: Study on production of lithopone from baritin and zinc oxide from Vietnam Code: QT- 02-15 b Director: Trinh Ngoc Chau, Assoc Prof Dr c Members: - Vu Dang Do, Prof Dr - Trieu Thi Nguyet, Assoc Prof Dr - Nguyen Thi Thuy Hang, Ma student d Researching Attitudes and Contents: Researching attitudes: - Study on using baritin and zinc oxide from Vietnam for producing pigment lithopone Researching Contents: - Study on the process dissolving baritin from Ha Bac to barium sulfide; — preparing the pur solution of ZnS04 from ZnO Tuyen Quang and the process of precipitation lithopone e Results: Have been studied on: - The optimal conditions of temperature, burning time and amont of charbon for process dissolving baritin from Ha Bac to barium sulfide, -The process of removing Si02 AI2O3 and some heavy metals from ZnO from Tuyen Quang for preparing the pur solution of ZnS04 -The process of precipitation the wihte pigment lithopone from the salt solutions of zinc sulfate and barium sulfide - Tlie chemical composittion and properties of the obtained product MUC LUC Trang M DAU A TONG QUAN VE LITOPON Giai thieu v6 litopon Dieu che bari sunfua Dieu che ZnS04 tiiZnO phan ung voi dung dich H2SO4 Dieu che litopon B PHAN THUt NGHIEM I Xac dinh phan quang ban dau 11 11 Phan tich phan quang baritin 11 Phan tfch phan quang kem 11 II Dieu che dung dich bari sunfua 11 I Anh huang ciia nhiet tai hieu suat phan huy quang 12 Sir phu thupc ciia hieu suat phan huy quang vao luang than 12 hieu suat phan huy quang phiJ thupc vao loai than 13 Sir phu thupc cua hieu suat phan huy quang vao thai gian nung 13 So sanh hieu suat phan huy cua BaSOj va quang baritin 14 III Dieu che dung dich ZnS04tLr quang kem IV Tong hgp litopon , 14 15 Khao sat anh huang cua ndng dp den chat lugng litopon 15 Anh htrang ciia pH den mot so tfnh chat ciia litopon 16 Anh huang ciia nhiet dp nung tai mau sic ciia san ph^m 16 Dieu che litopon tu hoa chat tinh khiet 16 V Xac dinh cac dac di6m va tfnh chat cua litopon 17 Dp trang va tham dau cua litopon 17 Nghien ciai litopon bang phuang phap nhidu xa tia X 18 Nghien cuu htopon bang phuang phap kfnh hien vi dicn tuquet 20 Phan tfch cohat Phan tfch phan san phfim bang phuang phap huynh quang tia X 25 KET LUAN TA\1 L I E U HAM KHAO 26 27 MODAU Cac sSc to CO vai tro rat quan thuc te, khong chi doi vai nganh hoa hoc ma nhieu nganh kinh te quoc dan Cac loai sac to trang thong diing hien la Ti02PbCO3, Pb(0H)2, litopon Litopon la sac to mau trang co nhieu uu diem dugc sir dung lam son, phan cua dau mai, cong nghiep trang men va lam chat don cao su nham giam gia va lam tang siic chong mai mon ciia no Nha nhung ung dung rong rai nen a nhieu nuac da xay dung nha may di san xuat litopon Rieng a My nhiJng nam chien tranh lugng litopon dugc san xua't vugt tren 200.000 tan Con a Viet Nam, rang khoang vat barit, nguyen lieu dau de san xuat litopon co a nhieu nai nhu Cao Bang, Thanh Hoa, Nam Xe ( Ha Bac ) Nhung lugng can ddi vai sac to van phai nhap tu ngoai Xuat phat tir thuc te chiing toi nghien ctru qua trinh dieu che litopon tir cac nguon quang kem va quang bari ctia Viet Nam vai hi vgng dong gop cho qua trinh nghien cuu san xuat litopon tu cac khoang vat nuac dt thay the cac san pham nhap ngoai Gop phan giai quyet yeu cau truac mat va lau dai cua nganh cong nghiep son va cao su ciia nuac nha L (Jidi thieu ve litopon Litopon la tinh the; co mau trang, phan gom ZnS va BaS04 vai ti le 1: I va iSn mot lugng nho ZnO Litopon dgc dung lam chat mau cho scTn, da nhoi, giay, vai dau, my pham Trong litopon ZnS va BaS04 ton tai a dang h6n hgp ca hgc Gurevutr va Bogaia Valen cung Kudanhexop da chung minh sir ton tai dgc lap gom cua BaS04 va ZnS litopon bang cac phuang phap vat ly khac Litopon la nhung hat tinh th6 co kfch thuac nam khoang 1- |.im Chi so khuc xa va xop cua no phu thuoc vao ti le giua BaS04 va ZnS vi hai phan co chi so khiic xa khac Chi so khiic xa ciia ZnS la n^ = 2,37 va BaS04 la n^ = U64 ZnS chiia litopon cang nhidu thi xop ctia no cang Ion Sac mau cua litopon cung phu thuoc vao ti le tron giiia ZnS va BaS04 Theo Bogaia Valen va Kudanhexop thi chi so khiic xa ciia litopon tieu chuan n^ = 2,0, ti le ZnS chiia litopon cang lan thi chat Igng litopon cang cao Kiem khong tac dung vai litopon, cac axit vo ca pha huy ZnS tao H2S Litopon nhay cam vai anh sang phan ting giua ZnO va ZnS luon luon co mat litopon lam cho no co mau hat de ZnO H- Zn S -> Zn -H SO - 142,7 Kcal Sir den di ciia litopon chi xay ton tai chiing mot lugng nho hai am va mot so muoi tan dugc nac Nghien ciiu nguyen nhan khong ben vai anh sang, SunVo da di den ket luan : Tfnh chat khong ben doi vai anh sang la khong t6n tai litopon cac muoi ZnCl2 tan nuac Ong suy rang litopon ben anh sang sau ngam no axit sunfuric rat loang (2%) de hoan toan riia sach cac muoi ciorua tan nac Nhilu cong Irinh nghien ciru ve tfnh ben vung doi vai anh sang CLia litopon ddu la sir phan huy ZnS kem kim loai va lu huynh Nguai la giai thfch hien tugng litopon den roi trang tra lai dugc la sir oxy hoa kem kim loai ZnO bang oxy khong khf Kaphir va Davidolexcaia cho rang neu muon tong hgp litopon khong bi thay ddi mau sac duai tac dung ciia anh sang, can phai dua vao dung dich ZnS04 nhiing muoi tan nuac vai lugng coban khoang 0,005% so vol lugng kem kim loai Trong cac dieu kien cong nghiep lugng co ban dua vao co the tang len tai 0,015% tham chi den 0,018% Dieu che bari sunfua Cac loai quang baritin rat giau bari nen ngai ta thuong dugc siie dung d6 dilu che ban sufua Qua trinh khir baritin bang cacbon co the- dugc bieu difin bang hai phan ung sau : BaS04 -h C ^ BaS -H CO -121.7 kcal (1) BaSO, + C -> BaS + CO 44,3 kcal (2) Xpini Donob da da ket luan rang sir khir barit xay nh sau : ban dau mot phan than chay dilu kien thieu khong khf tao oxit cacbon va sau xay qiia trinh khii barit bang oxit cacbon theo phan ting : BaS04 + CO ^ BaS +4 CO2 + 33.1 kcal CO, + C -> CO + CO - 77.4 kcal BaS04 + C ^ BaS -^ 2CO2 - 44,3 Kcal Vl vay, cong trinh ciia minh Suxa Kevich va Xpini Donob da chi rang mac diJ phan iing tdng cong cii mot phan tii bari sunfua can tieu tdn hai phan tii cacbon, xong qua trinh chinh ciia sir khii xay khong phai cacbon tac dung true tiep len barit ma la oxit cacbon Nghien ciiu anh hudng ciia cac hgp chat hdn hgp tu nhien vai quang barit len qua trinh khu cho ta thay su co mat Si02 lam giam hieu suat tao BaS nhiet tren l000^BaSO4 quang tac dung vdi SiO theo cac phuang trinh phan ting sau : BaS04 + S1O2 = BaSi03 + SO3 BaS04 -H BaSiO, = Ba2Si04 + SO3 BaS04 + BaSi03 = Ba3SiO, + 2SO3 SO3 + CO = SO + CO SO2 + CO = 4"C0 + S2 Chfnh cac chat khong tan BaSOj , BaSiO:; lam anh hirdng den hieu suat tao BaS Chinh vl vay ngudi ta dieu che BaS dung quang barit cd ham lugng BaS04 khong nhd han 94% va ham lugng Si02 cd quang khong kin hon 3%, neu lugng SiO Idn thi mot phan BaS tdn phi de tao BaSi03 Cac tac gia ndi tren cung da khao sal sir phu thuoc ciia tdc khu barit bang mot sd loai than khac va nhan thay tdc khu barit bang than cdc cung gidng than da Dieu che ZnSO^ tif ZnO tac dung voi dung dich H.SO4 Dau tien lam giau quang va loai bd nhung tap chat khong cd Igi cho qua trinh dieu che ZnS04 can loai tru Sau dd dem quang da dugc lam giau d tren tac dung vdi dung dich H2SO4 cd ndng thfch hgp Khdi lugng rieng cua H2SO4 dugc diing nhung tnrdng hgp la 1,675 g/ml Mot phuang phap khac de' dieu che ZnS04 hi di tu cac loai ba thai cd chiia nhilu kem ciia cac nha may.thanh phan chii yeu ciia nd la kem kim loai kem oxit va kem silicat Ba thai la nguyen lieu rat tdt de dilu che ZnS04 \lrat de dang thu dugc ZnS04 cd dd tinh khiei cao Dieu che litopon Phuang phap chu yeu dilu che la thuc hien phan ung trao ddi giua BaS va ZnS04 Trong thirc le ngudi ta dung dung dich ZnSO^ cd ndng 300 - 350 e/I ixui iidi uuiig uiLii iiay idL uung vui iinau cno moi KCi lua irang uuui uanu unii LHC la litopon BaS + ZnSO, -^ BaSO, + ZnS - 24 kcal Nghien curu tfnh chat cua litopon phu thuoc vao di^u kien ket tua cua no Sunxa cho rang muon co litopon ben vung ddi voi anh sang ket tiia can tien hanh di6u kien co du luong bari sunfua Bogoia Volexki va Nhe Roxlacaia da nghien cuu tfnh chat ciia litopon thay ro tfnh chat cua no phu thuoc vao pH cua moi truong ket tua Chat lucmg litopon phu thuoc chu yeu vao pH a thoi diem d6 hai dung dich BaS va ZnS04 voi nhau, pH thoi dieim can khoang 7,5 -8,3 thi cho litopon CO pham chat tot nha't Trong dung dich diing de san xuat litopon, ngoai phan chfnh nhiJng san pham phu cua cac phan ung khong the tranh dugc lam cho litopon luon CO iSn mot long nho ZnO phan ung Phan ung phu xuat hien la ket qua cua su thuy phan ke't hop vdi BaS tao san pham trung gian cua phan ung : SH BaS + H2O ^ Ba < H,0 OH Sau barisunfua hydroxyt phan huy Ba(SH)2 va Ba(OH)2 SH Ba ( H2O -^ Ba(SH)2 + Ba(0H)2 + 10 H.O OH Ke't qua cua su thuy phan la tong tac ciia chiing voi ZnSO, : SH SH Ba < + ZnSO, -> BaSO, + Zn < OH OH Ba(SH)2 + ZnSO, ^ BaSO, + Zn(SH), Ba(0H)2 +ZnS04 ^ BaSO, + ZnfOH), Tiep theo do, nung litopon thi kem hydro sunfua tach hydrosunfua va kem sunfua Zn(SH)2 -> ZnS + H2S Kem hydrosunfua bazo bie'n hoac la kem sunfua hoac la kem oxit : SH Zn ( ^ ZnS + H.O OH SH Zn< ^ ZnO - H.S OH Zn(0H)2 -^ ZnO + H2O Trong dung dich bari sunfua dam dac chi cd mot lugng nho bari sunfua bi thuy phan nen ZnO chiia litopon khdng qua 1% Trong dung dich bari sunfua va bari hydroxit la : Ba(SH)2 _ 203 Ba(0M)2 ~ 111 Thuc te ti le bari sunfua va bari hydroxit khong dugc qua 1,1 - 1,3 bdi vl mot phan Ba(0H)2 bi oxy hoa bdi khdng khf pdli sunfua va hypo bari sunfua Trong dung dich BaS loang BaS bi thuy phan vdi mot lugng Idn va Ba(SH)2 bi oxi hoa nhilu han dd ti le tren giam xudng nhd hon I Neu dung dung dich d^ san xuat litopon thi lugng ZnO se tang len tu 2%- 3% QuantAS 3emi-Quar.c^t:atlv Name : 30LITOPO.ASQ ription: Mau LITOPON ix Type: Oxide le Identity: 30LITOPO LITOPON lents 13 ) )3 > Fil Net Intensity (Kcps) Concentration (%) Normalised Concentration 24.091 29.489 54.634 0.502 0.747 616 132 0.217 0.192 086 0.074 115 116 31.2 % 6.3 % 1.4 \ 4.9 % 19.1 ^ 1.74 % 1.61% 0.490 % 0.352 % 0.159 % 50 ppm 600 ppm 530 ppm 510 ppm 180 ppm 14.4 % 1.31 % 1.21 % 0.369 % 0.265 % 0.120 % 570 ppm 50 ppm 400 ppm 380 ppm 140 ppm 12/10/2004 10:4 n: ler/Flux: SpcBlend Concentration; 17.4 % Weight: 0.978 Sample W e i g h t : 653 T time factor: 31 n u m b e r before of [g] [g] elements normalisation identified: to lOO't : 13 75.3 2/ DAI HOC QUOC GIA HA NOI TRLONG DAI HOC KHOA HOC TU NHIEN NGUYEN THI THUY HANG V V KHAO M T QUA TDINH DIEU CHE CHAT MAU LITOPON TIJ CAC NGUON QUANG VET NAM CHUV€N NGRNH : HOn VO CO Win SO : 010401 LUAN VAN THAC ST KHOA HOC NGUOI H U N G D A N K H O A HOC: P.GS.TS: TRINH NGOC CHAU Ha Noi 2004 L^Mi HOC QUOC GIA HA NOI TRUONG OAI HOC KHOA HOC TU NHIEN KHOA HOA DETAI: KHAO SAT QUA TRINH DIEU CHE LITOPON TL'BARI SLNFATVAKEM SUNPAT KHOA LUAN TOT NCrHIEP HE DAI HOC LIEN I HONC; Chuyen ri'^anJi: Hoa \o CD Ngiari huong ddn : PGS TS Trinh Niioc Chau Ni/icoi thuc hien Ha Noi 2004 : Phaiii Thi Kim Pluionu tJAl HOC QL o r GIA HA NOI IRLDXC DAI ll(j( KlIOA llO' 11 M i l P A KIKJA IK)A HOC DIEU CHE DUNCi DICH KEM SUNFAT TUQUANC^ KEM OXIT VIET NAM VA T N ( ; HOP LITOPON KHOA LUAN TOT N(iHIEP HE DAI HOC LIEN THONC; CHUYEN NGANH: HOA VO CO Gi.io cicn huang dan: Smh Men llnrc hicn: P(iS.TS Trinh Nyoc riuui Pham Thi Nhien I la \oi :(]()4 ' DAIHOCQL6C(;IAHANOI TRUONC; DAI H O C KHOA HOC TUNHIEN KHOA HOA HOC NGHIEN cau QUA TRJNH DIEU CHE DUNG DICH BARI SUNFUA TU QUANG BARITIN KHOA LUAN TOT NGHIEP HE DAI HO( LIEN THONC; CHUYEN NGANH: HOA \ O CO Gidi> vien huang dun Sinh vien thuc hien : PGS.TS TRINH NGOC CHAU : Do Thi Kieu Nua Ha Noi, 2004 DAI HOC QUOC GIA HA NOI TRUONG DAI HOC KHOA HOC TL'NHIEN TUYEN TAP :AC CONG TRINH KHOA HOC • [01 NGHI K H O A HOC LAN THU - NGANH HOA HOC PROCEEDINGS OF THE ^ " CONFERENCE S E C T I O N OF C H E M I S T R Y Hanoi, November 2004 t ; Hoi nghi Khoa hoc Trucmg Dai hoc Khoa hoc Tu nhien DHQG Ha Noi - neanh Hoa hoc - 1 200-^ MUC LUC L DAC D I E M P H O H A P T H U E L E C T R O N C L A C A C P H L C C H A T P t ( n ) THIOSENHCACBAZONAT Ducmg Tuan Quang, Vu Ddng Do, Chu Dinh Kinh N G H I E N C i r u S I / T A O PHL-^C G I L T A P A L A D I (II) \ A T H I S E M I C \ C B A \ P Y R U V I C B A N G P H l T O N G P H A P P H O C O N G H U O N G TU' P R O T O N Error! Bookmark not defined Trinh Ngoc Chau, Nguyen Van Ha N G H I E N c u r u Q U A T R I N H DIEU C H E BOT MAU L I T H O P O N TL^ QUANG B A R I T I N VA O X I T K E M V I E T NAM 11 Trinh Ngoc Chau, Nguyen Thi Tlniy Hdng T O N G H O P VA N G H I E N ClTU KHA NANG T H A N ( ; HOA Cl A M O T SO A X E T Y L A X E T O N A T K I M LOAI Tneu Thi Nguyet, Do Dice Th) N G H I E N c t r u Q U A T R I N H T A C H LOAI C r ( V I ) Ni(II) T R O N G DUNG BANG C A M B I E N T I N H Nguyen Dinh Bdng Hodng Thi Hm/ng Hue 17 \)\C\\ 21 THU' N G H I E M T I N H C H E XERI BANG P H U O N G P H A P C H I E T \ DUNG MOI T B P T R E N T H I E T BI C H I E T NGU'OC D O N G N H I E U BAC LIEN T U C DANG K H U A Y L A N G ' ' 21 Nguyen Dinh Bdng Le Minh Tuan N G H I E N CLTU D I E U C H E B O T X E R I D I O X I T C O DO P H A N TAN VA DO SACH C A O Nguyen Dinh Bdng , Le Minh Tudn 32 T O N G H O P VA N G H I E N ChX H O A T T I N H X t ' C T A C CUA M O T SO P E R O V s k i T C H O P H A N iTNG O x i H O A A N C O L B E N Z Y L I C Ngo Thi Thuan Hodng Thu Trang 38 DAC T R U N G CUA Z E O L I T V BIEN T I N H DU'OC T O N G H O P TU' C A O LANH VIET NAM DEN PHAN U N G PHAN BO LAI T O L U E N 48 Ngo Thi Thuan Nguyen Tien Trung 10 N G H I E N C U U PHAN C N ' G C H U V E N H O A T O L U E N T R K N XUC l A C ZSM-5 BIEN T I N H 55 N^d Till Thuan Kh.icong Trung Thuv n N G H I E N CVI H O A T TJNH CUA HE XUC T A C N L Z r O ^ - S O j ' T R O N G 1ML\N iSC, D O N G PHAN H O A N-HEXAN 62 VA OXIT KEM VIET NAM > f •''^ '" '' ' I''!>i^' •"^';"H C/iaii .\ou\rn Tin I'liir fldnK^>._ Ilicu ' p h Ul llU\ ) (dau) K I 1.39 2.05 2.67 2.17 46.74 46.26 - ') 47.26 1.42 ^L^ 6S.10 (6X.6'^ ^ 2,20 ' 2.48 69.15 72.45 73.49 72.97 1 82.62 S2.93 -1 2,46 82.13 Hieu sudt phdn huy phu thupc vdo luang than Lay mau quang m6i mAu co khoi lugng quang la 3g cho \ao chen sU danh so ihu tu roi them m6i chen mot luong than tuang ung ia: \a 3g da\ chen bang nap r6i nuns cac chen 16 a 900"C thai gian la gut Tir ket qua xac dinh ham luang BaS trons cac chen san pham thu duac linh dugc hieu suat tnnh bay tren bang Bang 3: Hieu suat phim huy phu thuoc vao luang than m quang (g) m quang phan huy % 1-51 50.19 -> 1,95 64.91 TT m than J 73,49 2,20 3 Dung lirang than la 3g sau 3h nung a nhiet 900"C hieu suat phan huy dat 73,49% d nhiet do'^nay, neu luong than co tiep tuc tang thi sir phan huy cung tang khong dang kc' nua Nhu vay ti Ic- khoi luong quang: than la 1:1 So sank hieu sudt phan huy cua BaSO, tinh khiet va quang haritin Can mAu qumm bantm va mAu BaSO, nguyen chat, moi mau co kho, luong 3o ,-6i tron dai 3o than^^ Nung cac mau tren o nhiet 90(l"C Tho, gum 3h l u ham liwng BaS tfnh lueu suAt phan huy.Ket qua trung h,nh cua3 mau nung duoc chi la o bang Ket qua ehi tren hang cho thay ciing luong than 3g va tho, gian nung ^ S^^J^'^ nhu to-m bo BaSO, da hi khu (99^;.), quang moi chi phan huy duoc 7.^.4; , Di6u chung to lrong quang ngoai BaSO, co nhieu tap chai Na tap ciral co tiong quaim dri iiay anh huong it nhieu tin qua tiinh khu Ha.SO, Bang Hieu suat phan huy BaSO^ va quang baritin BaSOj lmh khiet Thai gian nung (g'^) m, ,, m I pii Quans barilm m hii\ 2,97 m I pli 99,0 liu\ 2.17 72.29 Hieu sudt phdn huy BaSO^ phu thuoc vdo loai than Lay cac mSu quang BaSO^, m6i mau co khoi luang la 3g iron deu \a\ :>o bot than day dung loai than khac nhau: than g6 than da than hoat tfnh Nung a cac nhiet khac nhau: 500"C 900"C lOOO'C.Thai gian nung duac giu nguyen: 3h Hoa tan san pham ihu dugc bAng HCl, xac dinh ham lugng Ba^*, Ket qua thu dugc a bang Bang5 Hieu suat phan huy BaSOj phu thuoc vao loai than Nhiet nung ("C) 900"C Than gb , Luang Luang ' : ^ : ^ quang quang > Hieu suat dau(g) (g) {%) 2,20 / • ^ Than da p h u y 73,49 Luan g quang dau (g) Th an hoat tfnh Luan Lugng quang p huv (g) ^ 2,16 Hieu suat iNc) 72.05 Lucmg ' Hieu u suat quang quang p huv dau fg) ! (%) (g) : I 1.76 58,8f} J) -1 Ket qua a bang cho thay loai than nghien cuu than go \a than da co tac dung gan ngang nhau, than boat tfnh hieu qua khir BaSO_;thAp h(rn nhieu Dieu co the' duoc giai thfch la mot phiin than hoat tfnh da bi cha\' trircVc nhiel xay phan ung khir BaS04 IL Dieu che dung dich ZnSOj tir quang kem Quang kem a dang ZnS da dugc nung oxi hoa de chuyen hoa thimh ZnC) ZnS + = 2ZnO + S : Cac sunfua kim loai khac chua quang cCing bi oxi hoa theo 4FeS + = 2Fe.O, + S : 4FeS, + 110, = F e A + SSO 2PbS+ = 2PbO + S : Do oxit keni chira nhieu tap chat la SiO^ FbO Fe.O-., CuO De thu duor dung dich ZnSOj sach diing cho viec dieu che litopon chung toi da su diJng qui trinh tach cac lap chat nhu sau: /.in ) ,M() r n u he () IcO CiH ) +(.idll-S(} ^'-r, ZnSCJ, Fe.f.SOj, Cu.SO SiO, PbSO I :^b Cu ZnS04, Fe,(.S0j„Ah(.S04)-, r I + CI:Zn0.r" ZnSO, Fe(OH) At(OH);, Trong dung dich kem sunfat thu duac suot khong miui chang to hitm lugng cac kim loai nAng kha nho Do cd the diing dung dich nav de^dieu che lithopon IH Nghien cixu anh huong ciia pH tm qua trinh ket tua hthopon Dung dich ZnSOj duac dicu chinh lai cd gia in \)\\ khac niiau: S \a 10 Sau duac iron vdi dung dich BaS theo li le moi 1:1 de ket tua lithopon Vira tron \'ira khuAy deu va theo doi tdc \'a mau sac ciia ke't lua lao Ket qua thu dugc nhu sau: TT mau pH Mail ciia san pham Trang xanh Trang hoi xanh Trang Trang Trang nga 10 Trang nga i Ket qua tren cho thav san pham lithopon thu duoc tien hiinh dong ket tiia a pH ban