Thaum lub sijhawm tsim cov kua qaub malonic, kev saib xyuas qhov ntsuas qhov ceev qhia tau tias thaum twg hloov mus rau diethyl malonate lossis monoethyl malonate tau mus txog qhov kawg. Kev ntsuas tas mus li txhawb kev hloov kho cov txheej txheem ncaj qha, tiv thaiv kev tsis sib xws ntawm cov pawg thiab txo cov khoom siv raw pov tseg.
Kev ntsuas qhov ceev hauv kabxa cov ntaub ntawv taug qab tas mus li ntawm kev nce qib ntawm cov tshuaj esterification, tshem tawm cov qauv kuaj thiab qhov kawg tsis meej. Kev ntsuas qhov ceev hauv cov tshuaj lom neeg tso cai rau kev hloov kho sai, tsis siv neeg, txo kev siv zog thiab pov tseg. Kev tshawb fawb hauv kev lag luam ua pov thawj tias kev koom ua ke ntawm lub ntsuas qhov ceev hauv cov txheej txheem tshuaj ua rau cov zis sib xws ntau dua 95%, raws li kev tshawb fawb tsis ntev los no. Qhov kev ua kom zoo dua no tsav kev siv zog hauv kev tsim tshuaj thaum txhawb nqa cov kev cai zoo rau diethyl malonate synthesis thiab monoethyl malonate synthesis.
Diethyl Malonate Cog
*
Kev Txheeb Xyuas Txog Cov Txheej Txheem Esterification
Malonic acid ua rau cov tshuaj ethanol tsis muaj dej nyob rau hauv kev tswj qhov kub thiab txias, tsim cov diethyl malonate thiab monoethyl malonate los ntawm esterification. Txhua theem qhia txog kev hloov pauv ntawm qhov ceev - qhov ceev ntawm cov tshuaj reactant txo qis thaum kev hloov pauv mus ntxiv. Kev ntsuas qhov ceev hauv cov tshuaj lom neeg muab kev taug qab tas mus li ntawm cov kev hloov pauv no. Kev kuaj pom tiag tiag ntawm qhov ceev threshold cim qhov kawg ntawm kev ua tshuaj hauv chemistry.
Kev txhim kho cov txheej txheem, ua tiav los ntawm kev saib xyuas qhov ceev ntawm cov khoom siv hauv kab, txo qis kev ua ntau dhau thiab kev siv cov khoom siv raw. Kev ntsuas tas mus li hauv kab ua rau cov khoom tsim tau ntau tshaj plaws thiab ua kom muaj kev siv hluav taws xob zoo hauv kev tsim tshuaj. Qhov no txhawb nqa kev tsim cov diethyl malonate thiab cov ntawv thov monoethyl malonate uas muaj txiaj ntsig zoo, siv cov khoom siv tshuaj lom neeg malonic acid nrog kev tswj cov txheej txheem meej.
Cov Teeb Meem Hauv Kev Ntsuas Qhov Ceev/Kev Ntsuas Qhov Ntsuas Hauv Kab
Cov tshuaj sib xyaw ua ke hauv esterification hloov pauv hauv viscosity thiab density vim muaj kev hloov pauv ntawm malonic acid conversion rates. Inline density meter calibration xav tau kev them nyiaj kub nruj, vim txhua qhov hloov pauv 1°C tuaj yeem hloov pauv qhov ceev ntawm cov tshuaj los ntawm kwv yees li 0.15–0.2 kg/m³, ua rau muaj kev nyuaj rau kev kuaj pom qhov kawg ntawm cov tshuaj.
Qhov muaj cov khoom seem txo qhov kev ntsuas qhov kawg, cuam tshuam rau qhov tseeb ntawm kev saib xyuas qhov ceev. Kev kuaj tes hauv kev tsim cov diethyl malonate ua rau muaj qhov yuam kev txog li 3%, nrog rau kev ncua sijhawm uas cuam tshuam kev ua tiav tam sim ntawd thiab kev kho cov txheej txheem tiag tiag.
Diethyl malonate
*
Cov txiaj ntsig ntawm kev sib koom ua ke ntawm Inline Density Meters
Kev ntsuas qhov ceev ntawm inline density meter ua kom muaj kev kuaj pom qhov kawg ntawm cov tshuaj tiv thaiv thaum lub sijhawm malonic acid thiab diethyl malonate synthesis. Kev siv inline density meter rau cov txheej txheem tshuaj txo cov pawg tsis raws li qhov tau teev tseg, muab kev saib xyuas tas mus li ntawm kev hloov pauv tshuaj hauv esterification siv malonic acid thiab anhydrous ethanol. Kev hloov kho cov txheej txheem tsis siv neeg tswj qhov kawg ntawm cov tshuaj tiv thaiv hauv chemistry, txo qhov kev hloov pauv ntawm cov khoom xav tau stoichiometry.
Kev saib xyuas qhov ceev ntawm cov khoom siv ua kom pom tseeb sai sai ntawm cov cim qhia txog kev ua tiav ntawm cov tshuaj, txo qhov kev ncua sij hawm uas cuam tshuam nrog kev kuaj tes. Kev ntsuas qhov ceev hauv cov tshuaj lom neeg ncaj qha txiav kev ua ntau dhau. Qhov no txo cov khoom siv raw ntau dhau thiab txiav cov khoom poob, raws li pom hauv monoethyl malonate synthesis, qhov twg kev taug qab qhov ceev txo cov khib nyiab ntau dua 10%. Kev tswj qhov kawg zoo tshaj plaws txo cov kev siv hluav taws xob los ntawm 8-12% thaum lub sijhawm siv diethyl malonate los ntawm kev ua kom sov thiab txias.
Tus nqi ntawm Lonnmeter Inline Density/Concentration Meters
Cov ntsuas qhov ceev ntawm Lonnmeter inline muab qhov tseeb ntawm ±0.001 g/cm³, uas yog qhov tseem ceeb rau kev kuaj pom qhov kawg ntawm cov tshuaj tiv thaiv hauv kev ua esterification. Kev ntsuas qhov ceev uas raug thiab ua tiav tiag tiag txhawb kev hloov pauv ntawm malonic acid mus rau diethyl malonate thiab monoethyl malonate, uas suav nrog cov qauv tseem ceeb hauv kev tsim diethyl malonate thiab kev tsim monoethyl malonate.
Cov chav tsim los rau anhydrous ethanol hauv kev lag luam tseem ruaj khov nyob rau hauv corrosive, high-throughput tej yam kev mob. Rugged stainless hlau flow cells ua kom ruaj khov; sensor wetted qhov chaw yog chemically resistant rau malonic acid siv nyob rau hauv synthesis thiab anhydrous ethanol siv.
Thov kom tau ib daim ntawv hais nqe rau Lonnmeter inline density meters rau cov tshuaj lom neeg uas xav tau kev saib xyuas qhov ntom ntom nruj. Ua tiav qhov kev tshawb pom qhov kawg ntawm cov tshuaj tiv thaiv rau malonic acid, diethyl malonate, thiab monoethyl malonate synthesis siv cov cuab yeej inline siab heev xwb—tsis muaj software lossis cov txheej txheem tswj hwm suav nrog.
Lub sijhawm tshaj tawm: Lub Ib Hlis-27-2026
