Nghien cuu sCr dung chdt uc che mai dgng phenol trong qud trinh polymer hoa cdc sdn phdm long cua qud trinh nhiet phdn hydrocarbon TS D& Chiem Tdi, TS Dim Th{ Thanh Hii, TS Hoang Thinh NhSn Dai hoc Dd[.]
Nghien cuu sCr dung chdt uc che mai dgng phenol qud trinh polymer hoa cdc sdn phdm long cua qud trinh nhiet phdn hydrocarbon TS D& Chiem Tdi, TS Dim Th{ Thanh Hii, TS Hoang Thinh NhSn Dai hoc Ddu Viet Nam TSKH Gogotov A F Viin Hda hdu ca - Viin Hdn Idm Khoa hoc Liin bang Nga Tom tat Viee ddnh gid thd nghiim ede hgp chdt phenol vdl mgch nhdnh ed kich thudc Idn vai trd chdt dc chi qud trinh polymer hda ede sdn phdm Idng tdqud trinh nhiit phdn hydrocarbon dd eho thdy rdng: Adieu kiin phdng thi nghiim, ede hgp chdt 2,6-di-isobornyl-4-methyiphenol vd 3-isobornyl pyrocatechol cd hiiu qud Uc chi qud trinh polymer hda eao han lonol vd 4-tret-butyl pyrocatechol -Id chdt dc chi cd edu true tUOng tU vd dang dUge sd dung rgng rdi ngdnh cdng nghiip hda ddu I G i ^ thieu Mpt van de ky t h u i t thudng gap d dieu kien nhiet dd cao (> ISCC) c h l b i l n eac sin pham Idng cua qua trinh nhiet phan hydrocarbon (cdn ggi la pyrocondensate) la hien tUOng polymer hda cic hpp chat khdng no D i y la q u i trinh khong mong muon (qui trinh khdng the t r i n h khdi) quy trinh san x u l t va b i o q u i n eie monome, la nguyen nhan cP ban dan d i n vile hinh cac can ban polymer t r l n be mat t h i n h t h i p chung chit, cic t h i l t lai hidu qua kinh t l eao han Den nay, ed r l t nhilu hpp ehat cd hoat tinh dc c h l da va dang dupc nghien cdu, sin xuat va dng dung thuc tl.Tuy nhien, viec dn dinh cac hpp chat khdng no q u i trinh sin x u i t tai cac nha m i y hda d i u v i n chua dugc giii quylt hoan t o i n Viec chpn lya cac inhibitor phu thudc vao nhilu y l u td, bao gom phin cua hon hop hydrocarbon can dupc on djnh, d i l u kien cda q u i trinh phin tich, d i l u kien bao q u i n cua mpt sd chit, ngudn nguyen lieu d l sin xuat cic inhibitor tai n h i may va ning lyc tai chinh cda nha may bj cda t h i p chung eat (be mat cac dTa, b l mat l i m viee cua cic may cung cap nhidt ) Van de khdng nhdng l i m Qui trinh sd dyng inhibitor thye te eho t h i y giim c h i t lupng cic monomer (nhU ethylene, propylene, cac hap c h i t dang phenol l i cie inhibitor ed hieu qua dc stiren), tang nguy cO that t h o i t cic monome dudi dang c h l cao, vdi nhdng Uu d i l m co b i n vupt trdi so vdi cae c i n polymer m i cdn l i nguyen nhan chfnh lam tang t i n inhibitor khic, cu t h i l i : cac hpp chit loai phenol cd kha suit tam ddng hoat dpng cda thap chung cit, dudng ong, nang kim ham qua trinh polymer hda cao va cd tinh cdng ndi hPi de lam sach v i bao dudng djnh ky (ed nghTa la nghe eao han; eac hpp chat loai phenol cung nhU cac g i l m thdi gian hoat dpng cda he thong gida hai l l n b i o sin pham tao thinh t d chung ft doe hai hPn cac inhibitor tri, sda chda djnh ky) Ndi mdt cich tdng quit, q u i trinh thudc cac nhdm chat khie; g i i sin xuat t h i p hPn; polymer hda se lam g i i m hieu q u i kinh t l cda nha m i y ed t h i sd dyng c i mdi trudng cd oxy va khdng cd sin x u l t [1] oxy; ed the l i m tang hoat tfnh pham vi rpng bang viec thay doi so lupng v i cau true cda cic mach nhinh [2] Hiln nay, sin x u l t ap dyng phd b i l n hai g i i i p h i p ngan chin q u i trinh polymer hda cac hop c h i t Trdn thj trUdng inhibitor hien nay, eie hpp chat dang khdng no dieu kidn nhidt dp cao, dd l i (1) hydro hda phenol ehilm vai trd quan trpng v i duoc sd dung rdng cic hpp chat khdng no hoic (2) sd dung cic ehit dc c h l rai, d i e bidt viee dc c h l cic phan dng radical Ngoai q u i trinh trdng hpp (inhibitor) cho tdng trudng hpp ey vai trd la chat dc c h l q u i trinh polymer hda, cic hap chit t h i Thuc tien san xuat cho t h i y phuong phap thd dem phenol eon dupe sd dyng vai trd chat chong oxy oh KHi sd 9/2012 33 HOA - CHE BIEN D A U K H I hda Trong so eie hpp c h i t d?ng phenol dang ddpc dng Nga Phuang p h i p x i c djnh h i m Idpng nhya theo Bu-i dyng cdng nghidp thi lonol (2,6-di-ffet-butylphenol) rov [4] Phupng p h i p n i y d i dupe c h u i n hda v i ap du d l danh gia c h i t lupng cac sin p h i m trung gian v i 4-tret-butyl pyrocatechol (TBPC) cho hi^u qua eao n h i t v i duac sd dung rdng r l l nhit Tuy nhiln, tfnh tan cda hpp n h i m i y Ipc d i u v i san x u l t polymer Cic thf nghij hop chit phenol niy pyrocondensate l^i khdng dupc t l l n h i n h d d i l u ki§n tuang t i / d i l u kidn thuc tai c eao v i cin phii sd dung dung mdi phu trp (vf dy; etanol, n h i m i y Ipc hda d i u butanol) D i l u niy l i m g i i m tinh e^nh tranh v i t i n g chi Thi nghidm m i u gdm cic bUdc sau day: phf san xult Cho 100ml pyrocondensate v i o dtdcia bSi Trong chuong trinh nghidn edu kha nang dc c h l q u i kim loai (thilt bj p h i n dng chju I p suit) v i cho tW trinh polymer hda cua cic hpp c h i t phenol mdi, nhdm t i e inhibitor v i o d i y vdi khdi lupng 0,01 • 0,05%wt so v g i i da tim dupe mdt giii p h i p ky t h u i t mdi l i m tang pyrocondensate Ddng kin blnh dtdcia v i d i t vio bd ( hoat tinh dc c h l v i tdi Uu hda cic die tinh ky t h u i t khic nhi|t b i n g d i u d i dun ndng d i n nhidt dd ^ G cua eie hop chit phenol (tan tdt pyrocondensate, nhidt dd 6n djnh d mdc n i y v i sau gid liy binh dtdcia khdng tan nudc, khdng cd mdi khd chju) Dd l i vl^c khdi binh 6n nhi^t v i l i m ngudl tdi nhi$t dd phdng sd dyng cic hop c h i t dang phenol cd cic m^ch nhinh - Giai do^n t i l p theo l i ehung c i t pyrocondensa' vdng dupc tdng hpp t d p h i n dng gida eie hpp chit da d l ngudi b i n g hai nudc d nhidt dd 160°C trdn thiltl phenol cd c i u trdc don g i i n vdi cic terpene [3] "nOC-77M"vi khdi luang polymer tao (C) Thi/c nghiem Thye hi^n mpt thf nghilm song song nhung k h ^ Muc tieu nghidn cdu: Xac djnh k h i nang eac hpp chat sddyng inhibitor v i khoi lupng polymer tao thinh (C^ dang phenol ed mach nhanh isobornyt dc c h l qua trinh - Hidu q u i cua su dc c h l da dUpc xic dinh bing vidcs polymer hda cac c h i t khdng no cd pyrocondensate sinh khdi luong cda polymer hinh tnfdngIw d dieu kien nhiet dp cao sd dung inhibitor v i khoi lugng cda polymer hinh thin Ddi tupng nghien cdu: Sin p h i m Idng eda q u i trinh trudng hpp khdng sddyng inhibitor Hieu qui dcdi nhiet phan hydrocarbon (pyrocondensate) thude t h i p (E,%) dupe tfnh nhUsau: chung cat K-20 v i K-27 cua Bdng Cdc linh chdt cabdn cua pyrocondensate thudc hai thdp K-20 vd K-27 nha m i y sin xuat polymer EP300 thupc To hpp Ipc hda d i u Uen bang Nga ( v l sau se gpi t i t la K-20 va K-27) Cic tinh c h i t ca Pyrocondensate Danh muc Angarsk, Thinh Angarsk, Thip K-20 1_ Nhiet khdi sdi CO 2_ Nhiet dd ("