Lub synthesis ntawm organic pigments yog ib tug complex txheej txheem uas muaj ntau yam tshuaj tiv thaiv thiab purification kauj ruam. Hauv qab no yog qee cov kauj ruam tseem ceeb thiab cov ntsiab lus ntawm kev sib txuas ntawm cov organic pigments.
1. Raw khoom npaj
Lub synthesis ntawm cov organic pigments feem ntau pib nrog cov tshuaj yooj yim, uas yog hu ua intermediates. Piv txwv li, txhawm rau npaj qee cov organic pigments nyob rau hauv cov xim daj thiab xim liab, nws yog ib qho tsim nyog los tsim cov khoom siv tshwj xeeb nruab nrab uas muaj cov pab pawg hloov pauv tshwj xeeb (xws li trifluoromethyl, cyano, ntau yam halogen atoms, thiab lwm yam).
2. Cov kauj ruam tseem ceeb ntawm synthesis
ib. Benzene derivatives uas muaj cyano, trifluoromethyl, thiab ntau halogen atoms
Hom kev sib xyaw no tuaj yeem ua ke los ntawm ntau txoj hauv kev. Piv txwv li, phthalonitrile yog cov khoom siv raw rau kev npaj ntawm tooj liab phthalocyanine, uas tuaj yeem npaj los ntawm amination ntawm phthalic anhydride los ua o-formamidobenzoate, thiab tom qab ntawd ua haujlwm nrog phosphorus oxychloride.
b. Halogenated benzonitrile derivatives
Cov derivatives no tsis tsuas yog siv los ua ke cov xim tseem ceeb disperse dyes, tab sis kuj siv los ua ke dipyrrole (DPP) hom xim liab. Piv txwv li, cov txheej txheem synthesis ntawm nruab nrab p-toluene nitrile ntawm DPP pigment CI Pigment Liab 272 tuaj yeem siv nrog p-toluidine ua cov khoom siv raw, thiab pawg diazo hloov mus rau hauv pawg cyano (CN pawg) los ntawm diazotization thiab tshuaj tiv thaiv nrog cuprous cyanide.
3. Purification thiab Refining
Lub synthesized pigment feem ntau yuav tsum tau mus los ntawm ib tug series ntawm purification kauj ruam kom tshem tawm impurities thiab txhim kho cov purity ntawm cov khoom. Qhov no yuav suav nrog cov kauj ruam xws li crystallization, pom, ntxuav thiab ziab.
4. Kev Tswj Xyuas Zoo
Thaum kawg, cov xim hluavtaws hluavtaws yuav tsum tau sim rau kev tswj kom zoo kom ntseeg tau tias nws ua tau raws li cov qauv uas tau teev tseg. Qhov no suav nrog kev ntsuam xyuas ntawm xim lub zog, lub teeb nrawm, huab cua ceev, thiab lwm yam.
Cov kauj ruam saum toj no tsuas yog ib feem ntawm cov txheej txheem organic pigment synthesis, thiab cov txheej txheem synthesis tiag tiag yuav txawv nyob ntawm cov xim tshwj xeeb thiab cov chaw tsim khoom. Tsis tas li ntawd, nrog rau kev nce qib ntawm kev siv thev naus laus zis, cov kev sib txuas tshiab thiab kev ntsuas kev txhim kho kuj tau tsim thiab siv.