Li m uEthylbenzen l hidrocacbon thm c ng dng rng ri trong cng ngh tng hp ha du. Ethylbenzene, phenylethane, C6H5CH2CH3l hp cht Alkyl thm n vng, c ngha quan trng trong cng nghip tng hp hu c ha du. Phn ln ( > 99 % ) c s dng lm nguyn liu cho qu trnh sn xut Styrene monomer C6H5CH=CH2. 50 % ca qu trnh sn xut benzene trn th gii. Cn li t hn 1 % ethylbenzene c s dng lm dung mi cho sn, hoc nguyn liu cho qu trnh sn xut diethylbenzene. Hu nh tt c Ethylbenzene tinh khit c s dng lm polystyrene sn xut nha v cao su nguyn liu.6,4 triu tn / nm ca Ethylbenzene c sn xut ti M (s liu 2001). EU, khong 5,7 triu tn c sn xut vo nm 1999.

T l EB trn th gii gim trong nm 2008, l kt qu ca s suy thoi kinh t th gii, dn ti nhu cu v Styrene cng dn b thu hp li. Cc nh sn xut M, Tu u, Nht phn i vic tng gi nguyn liu, dn ti lm gim nng sut , hnh thnh cc cng ty lin hp. Khu vc Trung ng v Trung Quc, nng sut EB Styrene tip tc tng nh d on do nhu cu tng. Trong khi Trung v Nam M t l s dng gim trong 2008. Th trng th gii ang hi phc chm. Nhu cu EB trn th gii s tng mc trung bnh hng nm l 2.9% t 2008 ti 2013, c trng ch tng nhanh nht l khu vc Trung ng v Trung QucPhn 1 :nh ngha v tnh cht vt l:nh ngha: - Danh php IUPAC: etylbenzen - Tn khc l : etylbenzol,phenyletan,EB - Cng thc ha hc: C8H10 Cng thc phn t Cu trc Tnh cht vt l iu kin thng, Ethylbenzene l cht lng trong sut, khng mu vi mi thm c trng. Ethylbenzene c kch ng cho da v mt. Tng i c hi khi ung phi, ht th v hpph qua da. Khi lng ring : - 150C : 0.87139 g/cm3 - 200C : 0.867g/cm3 - 250C : 0.86262 g/cm3 Nhit nng chy : -94. 9490C Nhit si 101.3 kPa : 136.2 0C Ch s khc x + 20 0C : 1.49588 + 25 0C : 1.4932 p sut ti hn : 3609 kPa ( 36.09 bar ) Nhit ti hn : 344.02 0C Nhit chp chy: 15 0C Nhit t bc chy : 460 0C Gii hn chy + di:1 % + trn : 6.7 % n nhit + nng chy: 86.3 J/g +ha hi: 335 J/g nht ng hc + 37.8 0C : 0.6428*10-6m2/s + 98.9 0C : 0.39*10-6m2/s Sc cng b mt : 28.48 mN/m Nhit lng ring: + kh l tng, 25 0C : 1169 Jkg-1K-1 + lng, 25 0C : 1752 Jkg-1K-1 Gii hn nn : 0.263 ha tan trong nc 20 0C : 0,015g / 100ml T trng hi (khng kh =1) :3,7 im bc chy :15-20 0C Phn 2 : Tnh cht ha hc ca Ethylbenzene:

1) Trng thi xi ha: Etyl benzen vo qu trnh oxy ha trong cc tc nhn oxy ha khc nhau cho cc sn phm khc nhau nh hydroperoxide Ethylbenzene, acetophenone v thm ch acid benzoic.

Tt c nhng phn ng trn l phn ng oxy ha ca ethyl benzene vi nhng cht phn ng khc nhau nh+Phn ng 1 ha cht c s dng l NaCr2O7 +Phn ng 2 ha cht c s dng l CrO3 +Phn ng 3 c tc nhn oxy ha l Mg(CH3COO)2 +Phn ng 4 c tc nhn oxy ha l oxy trong khng kh

C6H5C2H5 + C2H5OH 2) kh hircaEthylbenzene : asstyrenec sn xut trong cng nghip tqu trnh kh hirca Ethylbenzene

3) Phn ng etylbenzen vi Br2 :

Phn 3 : Cc phng php sn xut Etylbenzen: C 2 phng php sn xut etylbenzen:-Chng hn hp hi Hydrocacbon thm C8-Ankyl ha benzen bng etylen3.1.Qu trnh chng tch t hn hp C8:-Khong 1% etylbenzen c sn xut t qu trnh ny,thng kt hp vi sn xut xylen t sn phm ca qu trnh Reforming-Sn xut etylbenzen t ngun ny tin hnh phn ln bng chng ct,qu trnh tch rt kh khn,cng ngh tin hnh chng trong khong hp (siu chng phn on)-Cng ngh u tin ca hng Cosden Oil and Chemical Company ra i nm 1957,lin kt vi Badger Company.-Qu trnh tch yu cu 3 thp chng,mi thp hn 100 a.Nhiu nh my c xy dng M,chu u,Nht trong nhng nm 60,tuy nhin do vn u t v gi nng lng tng nn phng php ny khng c tnh cnh tranh.3.2.Qu trnh ankyl ha bng Etylen: c tin hnh ch yu theo 2 phng php:-Tin hnh trong pha lng -Tin hnh trong pha hi vi xc tc rn tng c nh3.2.1.Qu trnh pha lng:a.Qu trnh alkyl ha vi xc tc axit Lewis,khng s dng Zeolit: Cng ngh aluminum Chloride trong pha lng c thng mi ha ln u tin vo nm 1930.Nhng cng ty pht trin cng ngh ny gm c Dow Chemical,BASF,Shell Chemical,Monsanto/Lummus,Union Carbide/Badger Qu trnh ankyl ha benzen bng etylen trn xc tc AlCl3 l mt phn ng ta nhit xy ra rt nhanh v phn ln to thnh etylbenzen

C6H6 + C2H4 C6H5-C2H5 iu kin vn hnh phn xng:-Benzen phi c sy kh trc khi s dng ( 99%) s dng sn xut styrene monomer [CAS RN: 100-42-5], C6H5CH = CH2 Hu ht monome styren (Ts = 145,20C) c sn xut bng phng php dehydro ha etylbenzen hoc l ng sn phm ca qu trnh sn xut propylen oxyt C ch phn ng:

H=125Kj/mol Phn ng l phn ng thun nghch,thu nhit mnh,tng th tch,thch hp tin hnh nht cao p sut thp It hn 1% ca Ethylbenzene sn xut c s dng nh mt trung gian sn xut diethylbenzene, acetophenone v ethylanthraquinone, nh l mt thnh phn ca nha ng v naphtha, v nh mt cht chng kch n cht ph gia nhin liu v gasolines. Trong nhng ng dng nh, quan trng nht l trong ngnh cng nghip sn ph nh l mt (Xylen hn hp) dung mi cho sn, keo xt, v vecni. Cht lng: a s cc nh sn xut xc nh c im k thut bn hng ca h theo tiu chun M v th nghim phng php ASTM D3193 "Tiu chun k thut i vi Ethylbenzene ". Cc thng s chnh ca mt c im k thut bn hng thng thng l: ti thiu tinh khit ca 99,5 wt. % V ti a mu sc ca 10 trn cc-Cobalt Quy m Platinumtrong khi cc tp cht quy nh v nng ca h ph thuc vo l trnh sn xut lm vic, cng vi cc c tnh hiu sut cy trng. Cc kha cnhkinh t C 99% Ethylbenzene c s dng c sn xut styrene monomer trn ton th gii. Nhng nm 1960 v u nhng nm 1970 t l tng trng hng nm ca styrene v Ethylbenzene trung bnh 10%. Khong 15% ca Ethylbenzene c tiu th trong sn xut hp tc ca styrene v oxit propylen.Cc nh my ny cung cp mt li th kinh t v gi tr ca sn phm propylen oxit ng. Sn xut nhiu ti cc nh my H Lan, Ty Ban Nha, Nht Bn, Singapore, Hn Quc v Hoa K. Nm 1999trn ton th giicng sut(trong103t/a)theo vngnhsau:North America 7700

South America 330

Western Europe 5900

Eastern Europe 1300

Korea/Taiwan/China 3800

Japan 3500

Middle East and Africa 680

Southeast Asia/Australia 500

Total 24700

Phn 5 : An ton mi trng 1.Mi trng: Ethylbenzene gim nhanh chng trong mi trng khng c ngha sinh hc tch ly. N ni trn mt nc v nhanh chng bay hi. Theo ch th EU Ethylbenzene hin khng phn loi l nguy hi cho mi trng.2.Con ngi: Theo ch th EU v cc cht nguy him nh hng n sc khe th Ethylbenzene c phn loi l kh c hi khi ht. Nu ht hi Ethylbenzene nng cao trong thi gian di c th gy ra chng mtm nhc u, bun ng, bun nn v mt phi hp. V tnh n phi khng gy thng tch nhng nu nut mt lng ln c th gy t vong. Etylbenzene c th gy kch ng nh n trung bnh n da v mt. Thng xuyn tip xc s dn n kh da v vim da.Phn 6 : X l v bo qun 1.X l: Trnh tip xc vi da, mt v qun o. Ch s dng ni thng gi tt. Ethylbenzene hi c th to thnh hn hp n vi khng kh. Cc gii hn n trong khng kh ( p sut kh quyn , o ti 140 o C) l h n gii hn (LEL) : 1.2% vol,thng n gii hn (UEL) : 8.0% vol.An ton thc hnh lu tr, x l v vn chuyn phi tp trung vo cc bin php phng nga trnh s nh la ca Ethylbenzene. Dp tt ngn la bt thng, hy b ngun nh la, trnh tia la, khng ht thuc. Ethylbenzene l mt cht lng d chy cao, nhit chp chy 15 20 oC v vy phi x l nhit mi trng xung quanh, trnh xa nh nng mt tri trc tip v cc ngun nhit. Ethylbenzene c th tch t tnh in do phi ch n cc bin php chng li tnh x ( tia la gy nguy him).2.Bo qun: Bo qun trong thng cha s dng thp khng g, km xilicat, nha epoxy. Khng ph hp vi nguyn vt liu butyl, cao su Neoprene hoc nitrile t nhin v hu ht cc sn phm nha.