Levulinic acid/CAS: 123-76-2
Kev Piav Qhia Luv:
Lub Npe Khoom: Levulinic acid
CAS: 123-76-2
Hom: ZA-Y
MF:C5H8O3
MW:116.12
QAUV:
Kev piav qhia:
Levulinic acid muaj ib qho saj tart, whiskey. Nws yuav raug tsim los ntawm kev ua ntawm ntau dua lossis tsawg dua concentrated HCL ntawm sucrose, glucose, lossis fructose; yog li ntawd, nws tau tshaj tawm tias muaj nyob rau hauv caramels.
Kev Qhia Tshwj Xeeb:
| Khoom | Cov Lus Qhia Tshwj Xeeb |
| Qhov kub yaj | 30-33 ° C (lit.) |
| Kub taw tes | 245-246 ° C (lit.) |
| Qhov Ceev | 1.134 g/mL ntawm 25 °C (lit.) |
| Lub zog ua pa | 1 hli Hg (102 °C) |
| Refractive Index | n20/D 1.439(lit.) |
| Cia txias. | Khaws cia rau hauv qab +30 ° C. |
| Kev yaj tau | 675g/l |
| Daim Ntawv | Kua Tom Qab Yaj |
| Xim | Xim daj ntshiab |
Kev Siv
Levulinic acid yog ib yam khoom siv biomass thiab nws cov derivatives, xws li ethyl levulinate thiab alkyl levulinate, tuaj yeem siv ua roj additives.
levulinic acid yog siv rau calcium levulinate hauv cov tshuaj, ua esters hauv cov kuab tshuaj thiab cov yas, thiab rau kev ua valerolactone. Thaum nws siv dav dua, nws yuav ua los ntawm cov khib nyiab cellulosic. Mesitonic acid, ib homolog ntawm levulinic acid yog tau los ntawm kev sib xyaw mesityl oxide nrog KCN.
Kev hydrogenation ntawm levulinic acid tuaj yeem tsim lwm yam tshuaj muaj txiaj ntsig. Valeric-g-lactone, uas yog cov kuab tshuaj zoo nrog kev siv dav dav, tuaj yeem tau txais hauv cov txiaj ntsig siab heev. Cov tshuaj no tuaj yeem hydrogenated rau 1,4-pentandiol, uas thaum lub sijhawm qhuav dej ua rau 1,3-pentadine (piperylene). Piperylene paub tias polymerize rau cov roj hmab thiab yog li ntawd yog qhov chaw ntawm cov roj hmab hluavtaws (Ghorpade thiab Hanna 1997).
Levulinic acid yog ib qho ua ntej rau kev tsim cov tshuaj intermediates xws li γ-valerolactone, ethyl levulinate, pentanoic acid thiab 2-methyl-tetrahydrofuran. Kev derivatization thiab esterification ntawm levulinic acid ua rau muaj peev xwm biofuels.
Nws kuj siv tau rau hauv:
Kev npaj cov catalytic composite los ua ke 5-hydroxymethylfurfural thiab furfural.
Kev tsim cov tshuaj tsw qab lag luam, fraistone.
Kev tsim cov pyrrolidone derivatives los ntawm kev txo qis amination.
Tag nrho cov synthesis ntawm mycobacterial arabinogalactan.
Ntim Khoom
200KG / Nruas los yog raws li cov neeg siv khoom xav tau.
Khaws cia thiab khaws cia
Lub neej txee: 24 lub hlis txij li hnub tsim khoom hauv cov ntim khoom tsis tau qhib khaws cia rau hauv qhov chaw txias thiab qhuav kom tsis txhob raug tshav ntuj ncaj qha, dej.
Lub tsev rau khoom muaj cua nkag, ziab kom qhuav kub tsawg, Sib cais ntawm cov tshuaj oxidants, cov kua qaub.
