Munguva yekugadzira malonic acid, kuongorora huwandu hwemasero eropa kunoratidza kana shanduko kuita diethyl malonate kana monoethyl malonate yasvika pamugumo wayo. Kuyera nguva dzose kunotsigira kugadziriswa kwakananga kwemaitiro, kudzivirira kusawirirana kwebatch uye kuderedza marara ezvinhu zvisina kugadzirwa.
Kuyerwa kwehuwandu hwemukatiinopa nguva chaiyo, kutevedza kufambira mberi kwe esterification reaction, kubvisa kusanzwisisana kwemaoko uye kusanzwisisika kwe endpoint. Kuyerwa kwe inline density mu chemical reactions kunobvumira kukurumidza, otomatiki control adjustments, kuderedza kushandiswa kwesimba uye marara. Zvidzidzo zvemaindasitiri zvinoratidza kuti kubatanidzwa kwe inline density meter ye chemical processes kunowedzera kuenderana kwezvinobuda neanopfuura 95%, zvichienderana nekutsvagurudza kwakaitwa munguva pfupi yapfuura. Kugadzirisa uku kunoita kuti simba rishande zvakanaka mukugadzirwa kwemakemikari ukuwo kuchitsigira zvinodiwa zvemhando yepamusoro zve diethyl malonate synthesis uye monoethyl malonate synthesis.
Chirimwa cheDiethyl Malonate
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Pfupiso yeKuyerera kweEsterification Process
Malonic acid inopindirana neanhydrous ethanol pasi pekudzora tembiricha kwakanyatsojeka, ichiburitsa diethyl malonate uye monoethyl malonate kuburikidza ne esterification. Danho rega rega rinoratidza shanduko dzakasiyana dze density—density ye reactant solution inoderera sezvo shanduko ichienderera mberi. Kuyerwa kwe inline density mu chemical reactions kunoita kuti pave nekutevera nguva dzose kwekuchinja uku. Kuonekwa kwe density threshold panguva chaiyo kunoratidza magumo e reaction mu chemistry.
Kuvandudzwa kwemaitikiro, kunowanikwa kuburikidza nekutarisa huwandu hwezvinhu zvinoshandiswa mukugadzirwa kwemakemikari, kuderedza kushandiswa kwakanyanya kwezvinhu zvinoshandiswa mukugadzirwa kwemakemikari uye kushandiswa kwezvinhu zvisina kugadzirwa. Kuyera zvinhu mukugadzirwa kwemakemikari nguva dzose kunowedzera goho rezvigadzirwa uye kunoita kuti simba rishande zvakanaka mukugadzirwa kwemakemikari. Izvi zvinotsigira kugadzirwa kwemakemikari e-diethyl malonate nekushandiswa kwemonoethyl malonate, zvichishandisa hunhu hwemakemikari e-malonic acid nekudzora kwakanyatsojeka kwemaitiro acho.
Matambudziko muInline Density/Concentration Measurement
Musanganiswa wemhinduro mu esterification unochinja-chinja mukunaka uye kuwanda kwechinhu nekuda kwekuchinja kwenzvimbo dzema "malonic acid". Kuongororwa kwemita ye "inline density" kunoda muripo wakasimba wekupisa, sezvo 1°C yega yega ichichinja kuwanda kwechinhu ichi neanenge 0.15–0.2 kg/m³, zvichiita kuti kuongororwa kwe "reaction endpoint" kuve kwakaoma.
Kuvapo kwechigadzirwa chimwe chete kunoderedza kunzwisisika kwekuyera endpoint, zvichikanganisa kunyatsoongorora density threshold. Kutora sampuro nemaoko mu diethyl malonate synthesis kunounza zvikanganiso zvinosvika 3%, nekunonoka kunotadzisa zviratidzo zvekupedza reaction nekukasika uye kugadzirisa maitiro panguva chaiyo.
Diethyl malonate
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Mabhenefiti ekubatanidza Inline Density Meters
Kuongororwa kwemita yehuwandu hwemukati kunovimbisa kuonekwa kwemhedzisiro yenguva chaiyo panguva yekugadzira malonic acid ne diethyl malonate. Kushandisa mita yehuwandu hwemukati pakuita makemikari kunoderedza mabheti asina kutsanangurwa, zvichipa kutarisa nguva dzose kwekushandurwa kwemakemikari mu esterification uchishandisa malonic acid ne anhydrous ethanol. Kugadziriswa kwemaitiro otomatiki kunochengetedza mhedzisiro chaiyo yemhinduro mumakemikari, zvichideredza kutsauka kubva ku stoichiometry yechigadzirwa chinodiwa.
Kutarisa huwandu hwezvinhu zvinogadzirwa nemakemikari kunoita kuti pave nekukasika kuona zviratidzo zvekupedza kuita basa, zvichideredza kunonoka kunokonzerwa nekutora sampling nemaoko. Kuyera huwandu hwezvinhu zvinoshandiswa nemakemikari mukuita basa remakemikari kunoderedza zvakanyanya kugadzirwa kwezvinhu. Izvi zvinoderedza zvinhu zvakasara uye zvinoderedza kurasikirwa kwezvibereko, sezvakaratidzwa mukugadzirwa kwemonoethyl malonate, uko kutevera huwandu hwezvinhu zvinogadzirwa kunoderedza marara neanopfuura 10%. Kudzora kwakagadziridzwa kwe endpoint kunoderedza kushandiswa kwesimba ne8–12% panguva yekushandiswa kwe diethyl malonate kuburikidza nekupisa kwakanyatsojeka uye kutonhora.
Kukosha kweLonnmeter Inline Density/Concentration Meters
Mamita eLonnmeter ane huwandu hwe ±0.001 g/cm³ akarurama, zvakakosha pakuona mhinduro yakavimbika mu esterification. Kuyera huwandu hwezvinhu panguva chaiyo kunotsigira kushandurwa kwe malonic acid kuita diethyl malonate ne monoethyl malonate, zvichisanganisira zviyero zvakakosha mukugadzirwa kwe diethyl malonate nekugadzirwa kwe monoethyl malonate.
Zvishandiso zvakagadzirirwa anhydrous ethanol mumaindasitiri zvinoramba zvakagadzikana kana zvinhu zvichiora uye zvichipisa zvakanyanya. Masero esimbi isina ngura akasimba anoita kuti zvinhu zvigare kwenguva refu; zvikamu zvakanyoroveswa ne sensor hazvigoni kushandiswa nemakemikari pakushandisa malonic acid mukugadzirwa uye kushandiswa anhydrous ethanol.
Kumbira mutengo weLonnmeter inline density metres yemakemikari anoda kuongororwa kwakasimba kwe density threshold. Wana mukana wekuona chaiwo reaction endpoint ye malonic acid, diethyl malonate, uye monoethyl malonate synthesis uchishandisa advanced instruments chete—hapana software kana control systems dziripo.
Nguva yekutumira: Ndira-27-2026
