异丁烯(叔丁醇)氧化法制备甲基丙烯酸甲酯的工艺

1、26 12008 1PclDchemical Technobgy & ApplicalionVol 26 Na 1Jai 2008(1.(34 38)73()070; 273OO6U3.100080)(NIAL)G(MMA)MAL20(IMMA),MMAMMA360MALMAL809025MALMMAA1ALQ 3 Q 4MPa.n(96 0%.MMA)/n(MAL)84 0%:1Q 225 24' 1(MMA)NKIA【5):1009 - 0045 (2008 ) 01 -0034 - 05A icoMMAACR19. 8141MMA,2005MMA15. 8t MMA(MB

2、S),2004MMA16 J1. 112005MMA5 nun )MMAC47. 5MMAMMA85%LY 9901MALC487% MALHalcan SD:2007 (M 26:(1981).:2OU7 -11-201351. 2()MMA(MAL)1#1#1 ( )MM A1. 2 1171CH、H,C C CH2 +H2OCH.H, C C CH,OHc42 0MPa, n () /n (0. 35 0. 65 mm /s88 8%I. 2 2 (H2C C CHj +O2CH,CH,吐 C C OH +O2(9 . 10)1. 2 3 MALMMAMALMMA2H,CC CHO +O

3、2 +2CH3OHCH.2H;C C COOCH3 + 2H2O(5)CH*MALMMAG :(DC, ；(2)CH,H5C C CH3 ,(1)OHCH,H,C C CH; +H;O (2)8090,)4，G4)MAL)MALh2c c cho +h2o ,ch5(3)CH,H2C C CHO +2HOCH,(4)()MAL22 1M AL2 1. 1 2 3%,320,MAL, 2 ,MAL,MAL0.150.250350.45停超IH间人1#1#MALMALMAL1374 0% 9 000h- pQrQ 2MPa MAL 300 320 320 360 - 0 M Pa-3600 2 M

4、P严MAL肚丁烯转化半尺的反应选捋性朋河总Borc- MAL二 MPa: 0;: Q 一； Q2M ALOWTU转化华/%23 45 亍 7工90000000001 1.的从应选择性你4O7 200 h MAL 4 MAL2 2 M AL MM AMAL XO 90 Q3Q 4MPa "7( 二 n(MAL) 一 MAL MMA 5 MAL MMAM LH化华/嗚M MK的反应选抒件感2-=?二L)、n(MAL ) MM AMAL MAL MAL9360 - MAL MAL1#13980900. 3 0 4MPa.n( ) /n(MAL) 20 25MALMMAMAL96 0% .M

5、MA84 0%mu lUa>!nponcn I mo lybdale catdysis J . App lied CataK sis1991(70): 149 15910 Benyahu F.MeamsA M Seteclhe oxidatbn of ix)buk;ne overbisnuth mol)bdat catalysisf J ). Applied Calassis. 1990(66):383 393.111,2001(7):21 - 23Ub12, c4H.2006(2):3 -4.【3】JI.,2004,23(5):506- 5IQI4J J.,2002.19( 12):7

6、27 - 72&5J】,3)01.12: 9 11|6|Kunnob L Onodera H. Catast tor poduclbn of un sill rafedaldelnde and un*utumted caitolr acid and method forprvduc- ti)n of unsatumled aldehyde and unsiifcimLd carbo弓lie acid byHl12)13J57(6):门46 1350Ul.74&.2(1)7.23(1):137 IM Pd Pb/AgO；J】.2(X)6.2(X)5, 56(9): 1690 -

7、1693I J) 2005.22(7):Ubtie u of the catastEP. 685260( Pl. 1995.7 c4【JI. 2007.36(8):825 82& C4UL,2003. 17(3):34 369 Bcnyahia F. MeamsA M Sc he live oxdalbn of ijobulene wcr.2005.27(1):57 6Q16)17|J】.20()4. 21(10): 775 777.0310073& 4I PL 2OO4O3 -31.1#1#Preparat ion process for m ethyl m ethacryh

8、 te from isobutene(tert - butyl alcohol) by oxidation methodD ing Xiaowei , Yuan Benu ang 2 ,L i Jichun" . Yan RuiyilDong B inglf , Wang Xiaoqiang(1. Chan ical and B iolog ica 1 Engincc ring Institute of Lanzhou J iao ton g University. Lanzhou 730070. Ch ina;Z Lanzliou Petrochan ica 1 Research

9、Center PetroChina, Lanzhou 730060. China:3. Institute of Process a nd Engineering Chinese Acadan y of Science, B eijiiig 10008(X China)1#1#Abstract: The preparatbn p rocess for methacm- lcin(MAL) and metliyl metliacryhte (MMA) by ox- idation method was studied in a fixed - bed reactor and a slurry r

10、eactor tejpeciively with raffinate C4 fractions by pioduct of ethylene plant as raw materials The results showed tluit for the preparatbn of MAL. isobutene( tert - butyl alcohol) conversion in creased along with the leaction tanpeiature iiicreas- iiig and tended b stabilize at 360 above; Isobutene c

11、onversbn al» increased abngwidi pressure rising, but the influence of pressure on MAL selectivity p ie sen ted the tie nd of increase at bvv tempc m tiiic and decrease at high tcnipcratuic; A bng with the ijobutene content uicrcasing. isobutene1#26conxersbn dropped, however. MAL selectivity exh

12、ibited die trend of first declining then increasing W hen MMA was prepaied by oxidatbn esterifica- tbn metiiod based on the MAL, the ijobutene con- versbn and MAL selectivity leached 96. 0%, 84. 0% respectively under the conditions of icactbntempe ratuie 80 90, reac tion p ressuie 0. 3 0. 4MPa.mole ratb ofmetlianol toMAL 20 - 25.Key word s: ijobutene (tert butyl alcohol) oxidation metlx)止 methaciolcin; metliyl methacrylate; oxidatbn e stcrificatbn: piocesss201231%#26201231%#262005 2006(http: / /epas enki net)2007315,20052006112(X)5 2(X)6/2005/0