Yuav ua li cas yog txoj kev npaj ntawm high-efficiency Chlorempenthrin nyoos hmoov

Chlorempenthrinyog ib yam tshiab ntawm pyrethroid insecticide nrog kev ua haujlwm siab thiab tsis muaj tshuaj lom, uas muaj txiaj ntsig zoo rau yoov tshaj cum, yoov thiab kab laum.Nws nta siab vapor siab, zoo volatility thiab muaj zog tua zog. Nws tuaj yeem cuam tshuam cov kab tsuag sai sai, tshwj xeeb tshaj yog thaum txau lossis fumigated, cov nyhuv knocking tseem ceeb dua.

Kev npaj

Txoj kev npaj ntawm high-efficiencyChlorempenthrincov hmoov nyoos tau muab faib ua peb theem hauv ib ntus:

Nyob rau hauv ib lub raj tshuaj tiv thaiv nruab nrog lub condenser rau reflux, stirring, xa me nyuam rov ntxiv, cua sov thiab txias, 200g ntawm dichloroethane thiab 200g ntawm sodium acetylene ntxiv. Tom qab sib tov thiab txias rau 10 feeb℃, 30g ntawm sodium hydroxide tau maj mam ntxiv hauv li 1 teev. Tom qab ntawd qhov kub tau nce mus rau 50℃, thiab 100 g ntawm valenal tau poob rau hauv 2 teev. Tom qab tso tawm ntxiv, qhov kub thiab txias tau khaws cia rau 10 teev, thiab cov tshuaj tiv thaiv tiav. Ntxiv 100g dej rau hydrolysis, cais cov organic theem, acid ntxuav thiab dej ntxuav cov organic theem, qhuav nws nrog sodium sulfate, thiab yaj nws kom tau 120g ntawm acetylene amyl cawv. Kub taw tes: 140-160℃, cov ntsiab lus: 98%, yield: 94.8%.

(2)Dissolve 62g ntawm acetylene amyl cawv los ntawm cov kauj ruam dhau los hauv 460g ntawm toluene, ntxiv 0.1g ntawm triethylamine ua catalyst, do thiab txias rau 5.℃, ces poob rau hauv 116g ntawm all-trans DV inulyl chloride rau 2 teev. Tom qab qhov sib ntxiv ua tiav, khaws cia ntawm 20℃rau 6 teev thiab cov tshuaj tiv thaiv tiav. Cov dej tau raug ntxuav ob zaug, thiab cov kuab tshuaj tau rov qab los ntawm kev ua kom tiav cov kua tshuaj tiv thaiv kom tau cov roj crude ntawm chlorenyl pyrethroid. Cov roj crude tawm los yog 157 grams, nrog rau 95%.

(3) Dissolve 100g ntawm crude Chlorempenthrin nyob rau hauv 200g ntawm isopropanol, ntxiv 0.1g ntawm catalyst triethylamine, txias rau 5.℃, do thiab crystallize rau 6 teev, centrifuge thiab tso tawm cov khoom, ces qhuav cov hmoov qub kom tau txais cov tshuaj chlorenethrin raw hmoov.