Txoj kev npaj ntawm cov hmoov Chlorempenthrin nyoos ua haujlwm zoo yog dab tsi?

Chlorempenthrinyog ib hom tshuaj tua kab pyrethroid tshiab uas muaj kev ua haujlwm siab thiab tsis muaj tshuaj lom, uas muaj cov nyhuv zoo rau yoov tshaj cum, yoov thiab kab laum.Nws muaj lub zog ua pa siab, zoo volatility thiab muaj zog tua tau zoo. Nws tuaj yeem tua cov kab tsuag sai, tshwj xeeb tshaj yog thaum txau lossis fumigated, qhov cuam tshuam ntawm kev ntaus yog qhov tseem ceeb dua.

Kev Npaj

Txoj kev npaj ua haujlwm zooChlorempenthrinCov hmoov nyoos raug muab faib ua peb kauj ruam raws li qhov sib lawv liag:

Hauv lub thawv tshuaj tiv thaiv uas muaj lub condenser rau reflux, do, ntxiv, cua sov thiab txias, 200g ntawm dichloroethane thiab 200g ntawm sodium acetylene tau ntxiv. Tom qab do thiab txias rau 10℃, 30g ntawm sodium hydroxide tau maj mam ntxiv rau hauv li 1 teev. Tom qab ntawd qhov kub tau nce mus txog 50℃, thiab 100g ntawm valenal tau poob rau hauv rau 2 teev. Tom qab poob ntxiv, qhov kub tau khaws cia rau 10 teev, thiab qhov kev ua tiav tau tiav. Ntxiv 100g dej rau hydrolysis, cais cov organic theem, acid ntxuav thiab dej ntxuav cov organic theem, ziab nws nrog sodium sulfate, thiab yaj nws kom tau txais 120g ntawm acetylene amyl cawv. Boiling point: 140-160℃, cov ntsiab lus: 98%, cov qoob loo: 94.8%.

(2)Yaj 62g ntawm acetylene amyl cawv los ntawm cov kauj ruam dhau los rau hauv 460g ntawm toluene, ntxiv 0.1g ntawm triethylamine ua tus catalyst, do thiab txias rau 5℃, ces muab 116g ntawm all-trans DV inulyl chloride tso rau hauv rau 2 teev. Tom qab ntxiv tag, khaws cia rau ntawm 20℃rau 6 teev thiab qhov kev ua tshuaj tiav lawm. Cov dej tau ntxuav ob zaug, thiab cov kuab tshuaj tau rov qab los ntawm kev yaj cov kua tshuaj kom tau txais cov roj nyoos ntawm chlorenyl pyrethroid. Cov roj nyoos tau 157 grams, nrog rau cov txiaj ntsig ntawm 95%.

(3) Yaj 100g ntawm cov Chlorempenthrin nyoos rau hauv 200g ntawm isopropanol, ntxiv 0.1g ntawm cov catalyst triethylamine, txias rau 5℃, do thiab crystallize rau 6 teev, centrifuge thiab tso cov khoom tawm, tom qab ntawd ziab cov hmoov qub kom tau txais cov hmoov chlorenethrin nyoos zoo.