Cinnamyl acetate, tsis muaj xim rau lub teeb daj pob tshab kua, muaj ib qho zoo nkauj sib xyaw ntawm qab zib balsam, sawv, thiab vetiver aromas, nrog balsam aroma tab sis nrog cov ntxhiab ntawm hyacinth thiab jasmine. Miscible nrog ethanol, chloroform, ether, thiab feem ntau tsis volatile roj, yuav luag insoluble nyob rau hauv glycerol thiab dej. Cov khoom ntuj muaj nyob hauv cov roj cinnamon, uas muaj cov khoom ntuj tsim. Nws tau txais los ntawm kev ncaj qha esterification ntawm cinnamyl cawv thiab acetic acid. Tom qab cov tshuaj tiv thaiv esterification, cov khoom tiav tau txais los ntawm kev nruab nrab, ntxuav, ziab, thiab lub tshuab nqus tsev distillation. Nws muaj qee yam tshuaj lom neeg ruaj khov, tab sis tuaj yeem ua rau cov tshuaj tiv thaiv hydrolysis nyob rau hauv cov kua qaub lossis alkali muaj zog. Nws muaj lub teeb floral thiab fruity aroma thiab tuaj yeem siv rau hauv cov txuj lom thiab tshuaj pleev ib ce.
(Cov khoom txuas: https://www.bloomtechz.com/synthetic-chemical/additive/cinnamyl-acetate-cas-103-54-8.html)
Method Ib - Acid Catalysis Method
Cov kua qaub catalyzed synthesis ntawm cinnamyl acetate yog ib txoj kev siv ntau, thiab cov ncauj lus kom ntxaws yog raws li hauv qab no:
1. Kev npaj cov ntaub ntawv raw: cinnamic acid, ethanol, concentrated sulfuric acid los yog hydrochloric acid sulfuric acid, catalyst (xws li sulfuric acid los yog hydrochloric acid sulfuric acid), dej.
2. Sib tov cinnamic acid thiab ethanol nyob rau hauv ib qho kev faib ua feem, thiab ntxiv ib tug tsim nyog tus nqi ntawm concentrated sulfuric acid los yog hydrochloric acid sulfuric acid raws li ib tug catalyst.
3. Ua kom sov qhov sib tov rau ib qho kub thiab do rau qee lub sij hawm cov tshuaj tiv thaiv.
4. Tom qab cov tshuaj tiv thaiv tiav, ncuav cov tshuaj tiv thaiv rau hauv dej thiab neutralize cov kua qaub ntxiv nrog cov tshuaj alkaline kom cov tshuaj nruab nrab.
5. Cais cov roj txheej sab sauv thiab qhuav nws nrog anhydrous sodium sulfate.
6. Lim kom tshem tawm sodium sulfate thiab tau txais cov cinnamic acetate crude.
7. Fractionation tuaj yeem siv los kho cov cinnamyl acetate thiab tau txais cov khoom zoo.
Cov hauv qab no yog cov tshuaj sib npaug rau cov kua qaub catalyzed synthesis ntawm cinnamyl acetate:
C6H5-C(O)-CH3 + CH3CH2OH + H2SO4 → C6H5-C(O)-O-CH2CH3 + H2O
Ntawm lawv, C6H5-C(O)-CH3 sawv cev rau cinnamic acid, CH3CH2OH sawv cev rau ethanol, H2SO4 sawv cev rau sulfuric acid, thiab C6H5-C(O)-O-CH2CH3 sawv cev rau cinnamic acetate.
Nws yuav tsum tau muab sau tseg tias cov tshuaj tiv thaiv kub thiab lub sij hawm yuav tsum tau nruj me ntsis tswj nyob rau hauv lub synthesis txheej txheem kom tsis txhob muaj cua kub ntau dhau ua rau cov khoom decomposition los yog sab tshua. Nyob rau tib lub sijhawm, xyuam xim rau kev ua haujlwm nyab xeeb thiab tsis txhob cuam tshuam ncaj qha rau ntawm daim tawv nqaij lossis nqus pa ntawm cov pa phem.
Txoj kev 2- Alkali catalytic method
Txoj kev alkaline catalytic ntawm cinnamyl acetate yog ib txoj kev siv los ua ke, thiab cov txheej txheem ntxaws yog raws li hauv qab no:
1. Kev npaj cov khoom siv raw: cinnamic acid, ethyl acetate, sodium los yog potassium hydroxide, catalyst (xws li sodium los yog potassium hydroxide), dej.
2. Sib tov cinnamic acid thiab ethyl acetate hauv ib qho kev faib ua feem, thiab ntxiv qhov tsim nyog ntawm sodium hydroxide los yog potassium hydroxide raws li catalyst.
3. Ua kom sov qhov sib tov rau ib qho kub thiab do rau qee lub sij hawm cov tshuaj tiv thaiv.
4. Tom qab cov tshuaj tiv thaiv tiav lawm, ncuav cov tshuaj tiv thaiv rau hauv dej thiab neutralize cov seem alkali nrog kua qaub kua kom cov tshuaj nruab nrab.
5. Cais cov roj txheej sab sauv thiab qhuav nws nrog anhydrous sodium sulfate.
6. Lim kom tshem tawm sodium sulfate thiab tau txais cov cinnamic acetate crude.
7. Fractionation tuaj yeem siv los kho cov cinnamyl acetate thiab tau txais cov khoom zoo.
Cov hauv qab no yog cov tshuaj sib npaug rau alkaline catalytic synthesis ntawm cinnamyl acetate:
C6H5-C(O)-CH3 + CH3COOC2H5+ NaOH → C6H5-C(O)-O-CH2CH3+ NAS3COO + H2O
Ntawm lawv, C6H5-C(O)-CH3sawv cev rau cinnamic acid, CH3COOC2H5 sawv cev rau ethyl acetate, NaOH sawv cev rau sodium hydroxide, C6H5-C(O)-O-CH2CH3sawv cev rau cinnamic acetate, NaCH3COO sawv cev rau sodium acetate, thiab H2O sawv cev dej.
Nws yuav tsum tau muab sau tseg tias cov tshuaj tiv thaiv kub thiab lub sij hawm yuav tsum tau nruj me ntsis tswj nyob rau hauv lub synthesis txheej txheem kom tsis txhob muaj cua kub ntau dhau ua rau cov khoom decomposition los yog sab tshua. Nyob rau tib lub sijhawm, xyuam xim rau kev ua haujlwm nyab xeeb thiab tsis txhob cuam tshuam ncaj qha rau ntawm daim tawv nqaij lossis nqus pa ntawm cov pa phem.
Txoj kev 2- Ester exchange method
Txoj kev sib pauv ester ntawm cinnamyl acetate yog ib txoj kev siv los ua ke, thiab cov txheej txheem ntxaws yog raws li hauv qab no:
1. Kev npaj cov khoom siv raw: methyl cinnamate, ethanol, catalyst (xws li sulfuric acid lossis hydrochloric acid sulfuric acid), dej.
2. Sib tov methyl cinnamate nrog ethanol nyob rau hauv ib qho kev faib ua feem thiab ntxiv ib qho tsim nyog cov kua qaub catalyst.
3. Ua kom sov qhov sib tov rau ib qho kub thiab do rau qee lub sij hawm cov tshuaj tiv thaiv.
4. Tom qab cov tshuaj tiv thaiv tiav, ncuav cov tshuaj tiv thaiv rau hauv dej thiab neutralize cov kua qaub ntxiv nrog cov tshuaj alkaline kom cov tshuaj nruab nrab.
5. Cais cov roj txheej sab sauv thiab qhuav nws nrog anhydrous sodium sulfate.
6. Lim kom tshem tawm sodium sulfate thiab tau txais cov cinnamic acetate crude.
7. Fractionation tuaj yeem siv los kho cov cinnamyl acetate thiab tau txais cov khoom zoo.
Cov hauv qab no yog cov tshuaj sib npaug rau kev sib txuas ntawm cinnamyl acetate los ntawm ester exchange method:
C6H5-C(O)-CH3-O-CH3 + CH3CH2OH + H2SO4 → C6H5-C(O)-O-CH2CH3+ CH3OH + H2O
Ntawm lawv, C6H5-C(O)-CH3-O-CH3 sawv cev rau methyl cinnamate, CH3CH2OH sawv cev rau ethanol, H2SO4 sawv cev rau sulfuric acid, C6H5-C(O)-O-CH2CH3sawv cev rau cinnamic acetate, CH3OH sawv cev rau methanol, thiab H2O sawv cev dej.
Nws yuav tsum tau muab sau tseg tias cov tshuaj tiv thaiv kub thiab lub sij hawm yuav tsum tau nruj me ntsis tswj nyob rau hauv lub synthesis txheej txheem kom tsis txhob muaj cua kub ntau dhau ua rau cov khoom decomposition los yog sab tshua. Nyob rau tib lub sijhawm, xyuam xim rau kev ua haujlwm nyab xeeb thiab tsis txhob cuam tshuam ncaj qha rau ntawm daim tawv nqaij lossis nqus pa ntawm cov pa phem.
Lauryl acetate yog siv dav hauv kev lag luam chemical ua raw khoom rau organic synthesis. Vim nws cov khoom siv tshuaj ruaj khov, nws tuaj yeem koom nrog ntau yam kev sib xyaw ua ke xws li ester txauv, ntxiv, thiab esterification. Yog li ntawd, nws yog feem ntau siv los ua cov khoom pib hauv kev npaj ntawm lwm cov tebchaw. Vim nws cov ester raws li nyob rau hauv txoj hauj lwm allyl thiab muaj cov khoom tawm mus zoo dua, cov khoom no nquag tsim cov allyl hlau reagents nyob rau hauv catalysis ntawm cov hlau hloov pauv thiab tuaj yeem koom nrog ntau yam kev hloov pauv ntawm cov organic. Tsis tas li ntawd, cinnamic acetate kuj tseem siv rau hauv kev tsim cov xab npum, tshuaj pleev ib ce txhua hnub, naj hoom thiab lwm yam khoom. Nws tuaj yeem siv los ua cov tshuaj tsw qab ntxiv kom muab cov khoom muaj txiaj ntsig zoo nkauj. Tsis tas li ntawd, nws tseem tuaj yeem siv rau flavoring. Raws li cov tshuaj tsw qab hauv cov tshuaj tsw qab, cov tshuaj no kuj tau siv dav hauv kev tsim cov tshuaj zoo. Vim nws tsis tshua muaj toxicity thiab zoo tshuaj stability, nws yog feem ntau siv los ua ke cov tshuaj advanced, xws li tshuaj intermediates, txuj lom thiab additives.