sx edc

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1SV: Trng Hu Linh Lp: KTHH 4K54

1 n cnhn GVHD:PGS.TS. Phm Thanh Huyn

Mu

Cng nghha du ngy cng pht trin, cc sn phm i tha du ngy cng adng p ng nhu cu cuc sng ca con ngi. Cc sn phm ha du i tetylen

chim ttrng ng k. Trong hp cht etylen diclorua (EDC) i tetylen csn xut cng nghip tnhng nm 1980, l hp cht trung gian sn xut vinylclorua chim 95% trong cc nguyn liu sn xut polime. EDC l mt cht lngnhit thng c cng thc ha hc l CH2Cl-CH2Cl l mt cht c i vingi tip xc v sdng.

EDC l mt sn phm c tnh ton cu, c sn xut ti hn 100 cng ty khong 50 nc trn th gii. N c s dng ch yu cho sn xut VC, lnguyn liu ch yu cho sn xut PVC. Ngoi ra n cn c s dng l ph gia

chng kch n trong ng c hoc lm hp cht trung gian sn xut amin v snxut dung mi (1,1,1-tricloetan, tri,tetra-clo etylen...).Nm 2002, c tnh ckhong 46 triu tn EDC c sn xut trn ton th gii. Th trng EDC thgii nm 2002 t gi tr khong 13 t USD (vi gi bn trung bnh l 270USD/tn EDC). V mt sn lng, trong thi gian 1997-2013 sn lng EDC thgii tng vi tc trung bnh 3 % /nm.

EDC c sn xut chyu bng phng php clo ha hoc oxy-clo ha etylen.Phn ln cc nh my EDC u c kt hp vi cc nh my VC p dng quy

trnh oxy-clo ha. Qu trnh sn xut VC sinh ra nhng lng HCl kh ln, chngc th c s dng li trong qu trnh oxy-clo ha sn xut EDC, nh s tc cn bng HCl v gim thiu mc pht thi kh ny.Kh c th nh gi cng sut ca cc nh my sn xut EDC, nhiu cng tykhng bo co cng sut thc ca h v EDC thng khng c bn ra ngoi.Hn na, do bn cht tun hon ca qu trnh oxy-clo ha nn ngi ta thngkhng cng b cng sut EDC.Mc tiu th EDC ph thuc ch yu vo tnh hnh ca ngnh sn xut PVC v dkin s tng vi tc 3,5 % /nm cho n nm 2013 ( theo vinachem ).

nc ta hin nay VC c sn xut ch yu t axetylen l nguyn liu tng it tin, i t nguyn liu etylen s gim chi ph ng k. Cc nh cung cp bnquyn cng ngh EDC/VC c th k n l Oxy vinyl, Inovyl, Misui Chemicals,Vinnolit, Solvay... Cc cng ngh ny u i t hai phng php c bn l phng

php clo ha trc tip v phng php oxy clo ha. Phng php oxy clo ha thsn xut vi sn lng v nng sut ln hn v tn dng c etylen t nhiu

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ngun khc nhau ( t cracking hi nc ) v HCl ca qu trnh cracking EDC snxut VC. Do vy phng php ny cn nghin cu v sn xut rng ri. Em xintrnh by phng php sn xut EDC hin nay.PHN I: TNG QUAN

I.

Tnh cht ca nguyn liu v sn phm.1. Tnh cht ca Etylen

a. Tnh cht vt l.Etylen iu kin bnh thng l cht kh khng mu, khng mi, t tan trongnc, nh hn khng kh.Phn t khi 28.05 g/mol, t trng pha 1,178 g/l 15oC, ha tan trong nc 25ml/100ml 0oC v 12ml/100ml 25oC. Etylen c t3-5% trong kh t, trong khng hnh chim n 20%.Ha tan tt trong ccdung mi hu c, v d nh ru, ete v cc hydrocacbon thm. Tnh cht vt lnh trong bng:

Bng 1.1. Tnh cht vt l ca EtylenCu t Nhit t bcchy(oC)

Nhit kt tinh

(oC)

Nhit si (oC)

Nhit ti hn

(oC)

Gii hn n trong khngkh ti 0.1 Mpa, 20oC

(%TT)

Gii hndi

Gii hntrn

Etylen 540(p sut

kh

quyn)

-169,15 -103,71 9,9 2,75(34,6g/cm3)

28,6(360,1g/cm3)

b. Tnh cht ha hc.Etylen c cng thc phn t l CH2=CH2l nguyn liu ban u quan trng trongtng hp ha hc. N c y tnh cht ca mt olefin, tnh cht ny l do nii trong phn t quyt nh.Nguyn t C lin kt i trng thi lai ha sp2,mt electron tp trung vo khong gia hai nguyn t C hnh thnh lin kt km bn. Do vy etylen d tham gia phn ng cng, v thng l phn ng cngelectrophil. Cc cht c cng vo l cc axit theo Lewis.

Phn ng cng.

Phn ng cng H2

2 4 2 2 6C H H C H

xt

t

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Xc tc thng sdng l Pt, Pd, NiNhit phn ng vo khon 100-400oC.

Phn ng cng X2

Brom v Clo cng vo etylen cho sn phm l dihalogen. Flo phn ng mnh lit

vi etylen cn iot km phn ng vi anken.

2 4 2 2 4 2C H Br C H Br

Phn ng cng nc

Phn ng dng xc tc H2SO4, H3PO4 ZnCl2, pha kh sdng xc tc Al2O3dng iu chru vi qui m cng nghip.

3 4o

H PO

2 4 2 3 2250 CC H +H O CH CH OH

Phn ng cng OXO

y l phn ng hydro formyl ha anken, vi xc tc Co2(CO)8 hoc phc cht caRodi.

2 4 2 3 2C H CO H CH CH CHO+ +

Phn ng oxy ha.

C thoxy ha etylen bng nhng tc nhn khc nhau.

Phn ng oxy ha bng KMnO4

4KMnO ,lanh

2 4 2 5C H C H OH

Oxy ha bng Ozon

3o

2 2

O

2 4 378 C,CH ClC H CH COOH

-

Phn ng Epoxi ha

L phn ng oxy ha anken to thnh cc Epoxi.

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Phn ng trng hp

Sn phm ca qu trnh trng hp l polyme. Mun to rapolyme, iu quan trngl phi c khi mo v ty thuc vo bn cht khi mo ta c cc c chkhc

nhau: Trng hp theo c chgc tdo, theo c chcation, trng hp phi tr.( )P,T2 2 2 2 nnH C CH H C CH= - - -

c.

Ngun nguyn liu

Etylen c sn xut chyu tqu trnh cracking hi nc ( steam cracking ) vinhiu ngun nguyn liu khc nhau: tcc hydrocacbon khc nh etan, propan,butan, naphta, kh ha lng (LPG) v gasoil. Mdo nhu cu sdng naphta choqu trnh reforming xc tc sn xut xng v do c ngun kh tnhin di do, nn

etan l ngun nguyn liu chnh c dng cho qu trnh cracking hi sn xutetylen (52% etylen c sn xut tetan, 22% tgasoil, 5% tnaphta cn li i tcc ngun nguyn liu khc). Trong khi Nht v Ty u li sdng phn onnaphta thu c tqu trnh chng ct du th cho qu trnh ny (71% etylen snxut tnaphta, 11% tgasoil, 11% tLPG, cn li tsn phm cracking e tan).

Cc nh my cracking hi da trn ngun nguyn liu u l e tan c chi ph xydng thp hn, hot ng n gin hn, cho hiu sut cao hn v t sn phm phhn. Hiu sut olefin c thtng bng cch tin hnh phn ng cracking nhit

cao, gim thi gian phn ng v tin hnh lm lnh nhanh hn.

Cc ngun sn xut etylen khc bao gm: dehydrat ha ru etylic ( n ,Brazin, Thy in, Trung Quc), cracking cc sn phm thu c tqu trnh hathan ( Nam Phi ) V chuyn ha ru metylic ( hng UOP/MobilM).

d. Phng php tn tr, bo qun

iu kin thng etylen l cht kh dchy n, v vy trong quy m cng nghip

etylen c bo qun trong cc thit bhnh cu vi bn knh ln, chu c psut cao. Cc thit bny c cu to bng thp chu lc, bc ngoi bng lpceramic cch nhit m bo an ton chy n.

2. Tnh cht ca HCla. Tnh cht vt l

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iu kin thng HCl l cht kh khng mu c mi sc, nng hn khng kh.HCl ha lng -85,1oC v ha rn -114,2oC. Kh HCl rt c chng c khnngn mn cc m ngi, gy tn thng c quan h hp, mt v da. dng longchng c sdng lm cht vsinh lau chi nh ca, xl da Kh hidro clorua

tan nhiu trong nc to thnh dung dch axit clohydric ( 0oC mt thtch ncha tan c gn 500 thtch HCl ). Dung dch HCl c l mt cht lng khngmu, mi xc bc khi trong khng kh m. Tnh cht vt l ca HCl nh trongbng:

Bng 1.2. Tnh cht vt l ca HCl

Hp cht Phn tkhi

(g/mol)

Ttrng(g/cm3)

Nhit nng

chy (

o

C)

Nhit si (oC)

Chit sut nht (25oC

Pas)HCl 36,46 1,18 -27.32 110 1.342 1,9 .10-3

b. Tnh cht ha hc

HCl l axit mnh c y tnh cht ca mt axit v c, trong dung dch HCl phnly ra ion H+v ion Cl-. Khi ha tan trong nc in H+skt hp vi phn tH2Oto thnh H3O

+. Do phn ly ha ton trong nc nn HCl l axit mnh, hng sKaca HCl c gi trln, gi trKa thng c tnh thng qua pKa. Gi trpKa ca

HCl giao ng t-3 n -7 thm ch n -9,3.

pKa = - log10Ka

Nh cc loi axit khc, HCl c khnng tc dng vi:

Kim loi gii phng kh Hidro v to mui clorua ( trcc kim loi ng sauHidro trong dy hot ng ha hc)

VD: 2 2HCl Fe FeCl H+ +

Oxit baz to ra mui clorua v nc.

VD: ZnO + 2HCl ZnCl2+ H2O

Baz to mui clo v nc.

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VD: NaOH + HCl NaCl + H2O

Mui: tc dng vi cc mui c gc anion hot ng yu hn to mui miv axt mi.

VD: CaCO3+ 2HCl CaCl2+ CO2+ H2O Ngoi ra, trong mt sphn ng HCl cn thhin tnh khbng cch kh

mt shp cht nh KMnO4(c), MnO2, KClO3gii phng kh clo.

VD: 2KMnO4(c) + 16HCl 2KCl + 2MnCl2+ 5Cl2+ 8 H2OMnO2+ 4HCl MnCl2+ Cl2+ 2H2O

c.Ngun nguyn liu

Axt clohiric c sn xut vi nng ln n 38% HCl(nng phn trm).Cc mc nng cao hn khong 40% c th c sn xut v mt ha hc nhngsau tc bay hi cao n mc vic ct gi v s dng cn c nhng khuynco c bit, nh trong mi trng p sut v nhit thp. Cp cng nghip sdng loi 30% n 34%, nhm ti u ha trong vic vn chuyn v gim tht thotkh HCl dng bay hi. Cc dung dch s dng cho mc ch gia nh Hoa K,hu ht l lm v sinh, th c nng nm trong khong 10% n 12%, vi nhngkhuyn co khi pha long. Anh, cht ny c bn dng "Spirits of Salt" dngcho lm v sinh trong nh, vi axt tng t nh cp cng nghip M.

Hu ht axt clohiric c sn xut M, Ty u v Nht Bn dng sn phmph theo phng php clo ha cht hu c.Cc nh sn xut chnh trn th giigmDow Chemical,FMC,Georgia Gulf,Tp on Tosoh,Akzo Nobel,vTessenderlo.Trong , Dow Chemical sn xut 2 triutnhng nm tnh theokh HCl; v cc cng ty cn li sn xut t 0,5 n 1,5triu tn/mi nm. Tng snlng trn th gii, tnh theo HCl, c tnh 20triu tn/nm, vi 3triu tn/nm tvic tng hp trc tip, v phn cn li l sn phm ph t cc qu trnh tng hphu c v tng t. Cho n nay hu ht axt clohiric c tiu th ch yu bi

cc nh sn xut s dng lm nguyn liu, ph liu sn xut cc ch phm khc.Th trng th gii tiu th khong 5triu tn/nm.

d. Phng php tn tr bo qun
http://en.wikipedia.org/wiki/Dow_Chemical_Companyhttp://en.wikipedia.org/wiki/FMC_Corporationhttp://en.wikipedia.org/wiki/Georgia_Gulf_Corporationhttp://ja.wikipedia.org/wiki/%E6%9D%B1%E3%82%BD%E3%83%BChttp://ja.wikipedia.org/wiki/%E6%9D%B1%E3%82%BD%E3%83%BChttp://ja.wikipedia.org/wiki/%E6%9D%B1%E3%82%BD%E3%83%BChttp://nl.wikipedia.org/wiki/AkzoNobelhttp://vi.wikipedia.org/w/index.php?title=Tessenderlo&action=edit&redlink=1http://vi.wikipedia.org/w/index.php?title=Tessenderlo&action=edit&redlink=1http://vi.wikipedia.org/w/index.php?title=Tessenderlo&action=edit&redlink=1http://nl.wikipedia.org/wiki/AkzoNobelhttp://ja.wikipedia.org/wiki/%E6%9D%B1%E3%82%BD%E3%83%BChttp://en.wikipedia.org/wiki/Georgia_Gulf_Corporationhttp://en.wikipedia.org/wiki/FMC_Corporationhttp://en.wikipedia.org/wiki/Dow_Chemical_Company

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cc nh my trc khi a vo sn xut HCl c bo qun trong can nha, phynha hoc xitec lt cao su y np kn. ni thong mt, bo qun nhit thp, nn kho ri mt lp ct. Thao tc vn chuyn, bc xp phi nh nhng, trnhgy v nu bn vo da phi ra ngay.

Trong phng th nghim HCl bo qun trong cc lo thy tinh c np y kn. Khithao tc s dn th phi tin hnh trong t ht.

3. Tnh cht ca EDC

a. Tnh cht vt l

EDC l mt cht lng khng munhng ti t t khi tip xc vi nh sng. Ncmi nhging nh cloroform,d bay hi, c hi v rt d chy.EDC l mt dungmi hu c tt nhng t tan trong nc.Khi chy EDC to ra kh c i vi con

ngi nn trong qu trnh bo qun trnh tip xc vi da v mt con ngi. Tnhcht vt lca EDC nh trong bng:

Hpcht

Nhit si(oC)

Nhit ng

bng(oC)

im chpchy trongcc kn(oC)

Gii hn n(% khilng trongkhng kh)

Nhit t bcchy(oC)

nht 25oC

cps

Ttrng 25oC

Pounds/gallon

EDC 82 -35.5 13.3 6.2-15.6 413 0.78 10.3

b. Tnh cht ha hc ca EDC

EDC c cng thc ha hc lClCH2-CH2Cl.

Phn ng nhit phn.

y l phn ng quan trng dng sn xut VC (vinyl clorua).

Qu trnh ny c tin hnh da trn phn ng phn huthu nhit sau:

2 2 2CH Cl CH Cl CH CHCl HCl H0298 = +70kJ/mol.

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II. Cc phng php sn xut EDC

1. Phng php clo ha trc tip Etylen sn xut EDC

C ch: cng electrophyl ( halogen ha xc tc ion )

Phn ng lun i km vi phn ng ph l phn ng th, c th gim

phn ng th bng hai cch:

Gim nhit xung n 30oC ( nh hng n tc phn ng )

Dng cht hm: Thm oxy vo trong cc thnh phn ca hn hp

phn ng c ch phn ng th. Khi c cht hm c th tin

hnh nhit 70 100oC.

Sn phm chnh: 1,2 - dicloetan, 1,2 - dibrom etan, 1,2diclopropan.

Cng ngh sn xut EDC bng phng php clo ha cng etylen.

Qu trnh clo ha trc tip etylen c tin hnh trong pha lng, pha kh t

c s dng. Phn ng ta nhit, nhit phn ng 50 90oC ph thc vo

phng php thu EDC. Khi EDC dng lng nhit phn ng l 50 60oC,

khi EDC thu dng kh nhit phn ng l 85 90o

C, p sut thp: 0,3 0,5.106Pa, t l Cl2/C2H4=1.

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S cng ngh:

i x l

FeCl3

Clo

Etylen

HCl

Kh

Qua dy

chuynlm sch

1

2

3 4

5

H1: Sn xut EDC bng phng php clo ha etylen, thu sn phm dng hi

1. Thit b phn ng2. Ct hi lu

3. Chun b xc tc

4. Thp n nh

5. Bung t

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H2: Sn xut EDC bng phng php clo ha Etylen thu sn phm dng hn

hp kh lng.

1.Thit b phn ng chnh 7. Thit b ra lng

2. Tch kh/lng 8. Thit b trung ha

3. Thit b phn ng th cp 9.Tch EDC/ nc

4. Chun b xc tc 10.Tch nc/EDC

5. Thp n nh 11. Tch phn on nng

6. Bung t 12. Thu hi EDC

Nguyn liu etylen v clo c sc vo thit b phn ng clo ha c cha xc

tc FeCl3, trong mi trng EDC. Nhit phn ng c tch v tun hon qua

b phn trao i nhit, lm lnh dt ngoi thp.

Nu tin hnh phn ng 50-60oC th sn phm thu c dng kh/lng.

Hn hp sn phm c a qua thit b tch kh lng lm vic trong mi

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trng kh tr N2 trnh chy n. Kh sn phm c them clo v a vo

thit b phn ng th cp, sn phm EDC ca thit b phn ng th cp s

c dng lm mi trng phn ng clo ha v iu ch dung dch xc

tc FeCl3. Sn phm lng ra khi thp tch kh lng c n nhit v n nh

nh thp chng ct. Phn kh tch ra c t b, sn phm lng c a

sang b phn tinh ch thu c EDC 99,8% trng lng.

Trong b phn tinh ch, u tin nc c thm vo tng cng qu trnh

xc tc FeCl3, pha lng thu c pha trn thp lng c cha mt lng nh

EDC ha tan c a sang thp tch EDC ra khi nc v tun hon li thp

lng. Lp lng pha di thp lng giu EDC c a sang b phn trung ha

bng ammoniac, sau c sy bng chng ct ng ph. Pha trn thpchng ct ng ph, EDC sau khi qua thng lng nng hn s c hi lu li

thp, phn nc cn ln mt lng rt nh EDC c tun hon li thp tch

nc. EDC khan thu c y thp chng ct ng ph c a sang thp

tch sn phm nng, tch EDC khi sn phm ph nh tricloetan Cc sn

phm nng c th c tch lm dung mi.

Nu tin hnh 85-90oC tc l gn nhit si ca EDC th sn phm thu

c dng kh.Qu trnh ny c u im l khng phi tch xc tc ra khikhi phm ng. Nhit phn ng c tch bng cch cho bay hi mt phn

mi trng phn ng, do v thit b phn ng n gin hn. Tuy nhin hiu

sut thu hi EDC li thp hn v mt phn EDc b mt khi xc tc i. Trong

trng h ny, thit b phn ng phi c gn them mt ct hi lu duy tr

lng lng trong thit b phn ng, ng thi tch v tun hon sn phm

nng. Sn phm kh thu c nh ct hi lu c a i t trc khi thi

ra mi trng, sn phm lng sau khi ngng t cha EDC th c a vo

thp n nh tch EDC y thp, phn nh c a i x l.

2. Phng php oxy clo ha trong pha kh sn xut EDC:

Phng trnh phn ng:

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2 4 2 2 4 2 2C H 2HCl 1 / 2O C H Cl H O+ + +

Xc tc: CuCl2/Al

2O

3, cc cht tr xc tc nh cc mui clo ca kali, kim

loi t him c s dng tng chon lc ca phn ng, gim bayhi ca xc tc mui ng, tng thi gian sng ca xc tc.

Phn ng ta nhiu nhit xy ra nhit 220 350oC, p sut 0,1 1,5MPa. Ti nhit ny to ra rt nhiu sn phm ph nh: monocloetan,VC, 1,2-dicloetylen

C ch phn ng:Qua giai on to phc ca clo vi etylen, sau phc ny chuyn thnh EDC.

Ti sinh xc tc:

2 2

12CuCl O CuO.CuCl

2+

2 2 2CuO.Cl 2HCl 2CuCl H O+ +

Qu trnh oxy clo ha etylen c th tin hnh vi oxy hoc khng kh, trongc hai trng hp trnh oxy ha su hydrocacbon c th dng lng detylen.

Qu trnh c th tin hnh trong pha lng hoc pha kh, tuy nhin hin naythng s dng qu trnh pha kh. Qu trnh pha kh thng s dng vithit b xc tc c nh hoc xc tc tng si.

Cng ngh sn xut EDC bng phng php oxy clo ha vi thit b xc tctng si bao gm cc b phn sau:

Phn ng: Thit b xc tc tng si dng hnh tr ng lm bng thp hp kim,c lp ng xon rut g c tch nhit ca phn ng ta nhit. C th dngcht ti nhit trao i nhit hoc nc sn xut hi nc. Trng thi tngsi c th c m bo bng cch sc tc nhn phn ng vo lp xc tc hoc

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bng khng kh nn. u im ca thit b xc tc tng si l m bo nhit tng i ng u trong ton thit b phn ng, trnh cc im qu nhit cc

b, iu kin phn ng mm hn ( 220-230oC, p sut 0,2-0,5 MPa ).

Lm lnh v x l kh sn phm: Ti u ra ca thit b phn ng, u tin khsn phm c a qua xyclon tch bi xc tc, sau nhanh chng clm ngui xung 90oC trong thp ti nng nh dng nc nng 80oC v dngnc lnh 10oC tch HCl. Sau dng sn phm c trung ha vi NH3vlm lnh trong thp ti lnh bng nc lnh 10oC trong mi trng kim thuhi mt s sn phm ph.

Tch kh: Sn phm kh thu c sau thp ti lnh vn cha mt lng ng kEDc s c lm lnh v a vo thp hp th bng dung mi alkylbenzen. Kh

khng hp th c a i x l hoc mt phn c nn v a i tun honli thit b oxy clo ha.

Tch sn phm lng: Phn on lng thu c sau hai thp ti nng v lnhc lng, trong mi thp lng u hnh thnh hai pha: mt pha hu c lnnc v mt pha nc ln cc cht hu c. Pha hu c giu EDC c gom li,a vo thp tch nc, pha nc c ln EDC c a vo thp thu hi EDC,tch nc thi.

Tinh ch EDC: EDC th c a vo thp tch nc bng chng ct ng ph(EDC to hn hp ng ph vi nc 72,3oC, cha 9,2% nc). nh thpchng ct ng ph, thu c nc ln EDC, EDC c lng v hi lu, ncnh hn thu c lp trn c quay li thp tch EDC/ nc. EDC khan thuc y thp c a sang thp chng ct thu c y thp c asang thp chng ct tch sn phm nh (dicloetylen, 1,1dicloetan) v sn

phm nng ( 1,1,2- tricloetan, pentacloetan, percloetylen).

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S cng ngh:

H4. S cng nghsn xut EDC bng phng php oxy clo ha etylen vithit bxc tc tn si

Cng ngh oxyclo ha etylen sn xut EDC trong pha kh vi xc tc cnh bao gm cc b phn sau:

Phn ng: Phn ng c thc hin trong thit b xc tc ng chm, cht tinhit c tun hon beeb ngoi ng cha xc tc tch nhit phn ng v sn xut hi nc. Cc ng cha xc tc phi c nhi xc tc rt ng

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u trnh hin tng gim p, gim tc dng chy v gim thi gianlu ca cht phn ng dc theo chiu cao ng, do vy trnh c hin tngqu nhit cc b v tng chon lc, thi gian sng ca xc tc. gimhin tng qu nhit cc b c th thc hin cc bin php sau:

- Gim th tch hot ng ca xc tc bng cch trn xc tc vi mt

cht n tr.- To gradien nng ca pha hot ng (CuCl2) trong qu trnh

nhi xc tc vo ng.- Hn ch qu trnh chuyn ha su bng cch dng vi thit b phn

ng ni tip cha xc tc vi hm lng pha hot ng CuCl2tngdn, cp khng kh hoc oxy song song. iu kin phn ng khcnghit hn so vi qu trnh dng thit b phn ng tn si (230-

300oC, 0,3-1,5MPa), cn phi ch ti vn n mn.

Ti: Sn phm kh ri vng phn ng c lm lnh bng nc lnh c phaamoniac hp th cloral. Phn lng c tun hon v mt phn c a vothit b lng thu hi EDC c ln.

Lm lnh b sung: Phn on kh ra khi thp ti c tip tc lm lnh, ngng tbng cch a qua thit b trao i nhit, sau a vo thp tch kh lng. Phnlng c trung ha bng amoniac v a vo thit b lng. Pha hu c cha nc

v pha nc cha EDC c x l tng t nh thit b phn ng tng si. Phnsn phm kh tip tc a i x l.

X l phn on kh: Sn phm kh i ra khi thp tch kh lng c sy, sau chuyn ha tylen cha phn ng bng cch clo ha. Qu trnh c tin hnhtrong dung mi EDC, mi trng phn ng c tun hon qua thit b trao dinhit, lm lnh t ngoi thp tch nhit phn ng. Sn phm EDC ca qu trnhclo ha c tch bng cch lm lnh ti -25oC bng cc thit b trao i nhit vthit b tch dt ni tip. Kh khng ngng c t v a i x l HCl trc khithi ra mi trng. EDC c a v b phn tinh ch.

i vi trng hp dng oxy, sn phm kh tch ra khi thp tch kh lng cnn v tun hon li thp oxyclo ha.

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S cng ngh:

H4. S cng nghsn xut EDC bng phng php oxy clo ha etylen vi thit

bxc tc cnh.

III. So snh la chn s cng ngh.Bng 3. So snh hai cng nghsn xut EDC

Cng nghxc tc tng si Cng nghxc tc cnh

u

im

-

iu kin phn ng mm

- Nhit ng u hn, trnh

c nhit cc b

- Dtch nhit phn ng

-

Cu to thit bn gin, d

iu khin

- Chi ph u t ban u thp

8/11/2019 SX EDC

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18SV: Trng Hu Linh Lp: KTHH 4 K54


- t sn phm phhn

- chuyn ha nguyn liu v

chn lc cao

Nhc

im

- Thit bphn ng phc tp

-

Xc tc chtng si v

vy i hi ng u v

bn c hc cao

- Chi ph u t ban u cao

- iu kin phn ng khc

nghit

-

Dbqu nhit cc b

- Sdng nhiu thit bphn

ng, tn vn u t

- Kh tch nhit phn ng

- Nhiu sn phm ph, chn

lc v chuyn ha thp

Cng ngh sn xut EDC bng phng php oxyclo ha vi thit b xc tc tngsi c nhiu u im hn so vi cng ngh oxyclo ha vi thit b xc tc c nh.V vy la chon cng ngh sn xut EDC bng phng php oxyclo ha bng thit

b xc tc tng si l mt la chon hp l.

sx edc

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