Dab tsi yog Rotovap hauv Organic Chemistry

Rotary evaporator nyob rau hauv cov organic chemistry yog ib qho kev sim siv cov cuab yeej siv, uas feem ntau yog siv los cais cov kua kuab tshuaj los ntawm cov khoom sib tov ntawm qhov tsis tshua muaj siab. Cov cuab yeej siv kev sib hloov ntawm lub raj mis teb thiab cov cua kub ntawm lub rhaub kom cov kuab tshuaj nyob rau hauv qhov sib tov volatilize thiab condense rau hauv cov kua los ntawm lub condenser raj, thiab thaum kawg sau cov kuab tshuaj sib cais.

Lub ntsiab Cheebtsam ntawmrotovap uamuaj xws li lub raj mis teb, lub rhaub dej, lub tshuab nqus tsev twj, lub raj condenser, thiab lwm yam. Thaum cov khoom sib tov ntxiv rau hauv lub raj mis teb, cov kuab tshuaj nyob rau hauv nws tuaj yeem hloov pauv thiab condensed los ntawm lub condenser raj los ntawm kev kho cov rotating ceev thiab cua sov lub rhaub, thiab thaum kawg sau. . Sib txawv ntawm cov distillation zoo tib yam, rotary evaporator tuaj yeem evaporate ntawm qhov kub thiab txias, yog li zam qhov decomposition thiab poob ntawm qee yam khoom kub-rhiab heev.

Thaum tshav kub kub-sensitive tshuaj yog hais txog cov khoom uas muaj feem xyuam rau lub cev los yog tshuaj hloov pauv xws li decomposition thiab denaturation ntawm qhov kub thiab txias. Cov tshuaj no tuaj yeem poob lawv cov qauv qub thiab ua haujlwm nyob rau hauv qhov kub thiab txias, ua rau muaj kev puas tsuaj zoo lossis tsis zoo.

Thaum tshav kub kub-sensitive tshuaj yuav ua tau cov organic tebchaw, inorganic tebchaw, cov ntaub ntawv polymer, thiab lwm yam, nrog rau tiam sis tsis txwv rau biomolecules, protein, tshuaj, tshuaj pleev ib ce, plastics, roj hmab, thiab lwm yam. Lub decomposition ntawm tshav kub-sensitive tshuaj feem ntau yog tshwm sim los ntawm kev tawg. los yog recombination ntawm bonds nyob rau hauv lawv cov molecules.

Ntau qhov kev sim ntawm kev rov qab los ntawm cov tshuaj lom neeg cov tshuaj lom neeg

1. Ether: Ua ntej, ntxuav cov kua ether pov tseg ib zaug nrog dej, tom qab ntawd kho tus nqi pH kom nruab nrab nrog cov kua qaub lossis alkali, tom qab ntawd ntxuav nws nrog 0.15% tshuaj poov tshuaj permanganate kom txog thaum cov xim liab tsis ploj, ntxuav nws nrog 0.15% ~ 1% ammonium ferrous sulfate tov tom qab distilled dej, thiab thaum kawg ntxuav nws nrog distilled dej rau 2 ~ 3 zaug, pov tseg cov dej txheej, qhuav nws nrog anhydrous calcium chloride, lim nws, thiab tom qab ntawd muab tso rau hauv ib qho chaw kuaj evaporator rau distillation.

2. Petroleum ether: Thaum xub thawj, cov roj av ether pov tseg kua yog distilled nyob rau hauv ib da dej ntawm (81 2) degree nyob rau hauv ib tugrotovap uarau 15-20min, thiab cov distillate dhau los ntawm iav kem nrog ib txoj kab uas hla ntawm 25mm thiab ib qhov siab ntawm 750mm kom tshem tawm impurities xws li muaj ntxhiab hydrocarbons. Cov txheej hauv qab yog ntim nrog silica gel nrog qhov siab ntawm 600mm, thiab cov txheej sab saud yog ntim nrog alumina nrog qhov siab ntawm 70mm, uas yog 150mm ua ntej siv. Rov ua qhov sib cais hauv lub tshuab nqus tsev evaporator kom txog rau thaum tus nqi seem (n=20) thiab lub teeb transmittance (n=10) yog tsim nyog.

3. Chloroform: Chloroform pov tseg kua yog ntxuav nrog dej distilled, concentrated sulfuric acid (1/10 ntawm tus nqi ntawm chloroform), dej distilled thiab 0.15% hydroxylamine hydrochloride tov nyob rau hauv ib theem, thiab ces ntxuav ob zaug nrog re- dej distilled, ces dehydrated thiab qhuav nrog anhydrous calcium chloride, sab laug rau ob peb hnub, lim thiab distilled ntawm ib tug distillation ceev ntawm 1-2 tee ib ob, thiab distillate nrog ib tug boiling ntau ntawm 60-62 degree yog sau thiab khaws cia. Rau cov organic impurities uas tsis tuaj yeem raug tshem tawm los ntawm distillation, activated carbon yuav siv tau rau adsorption thiab purification.

4. Carbon tetrachloride: Carbon tetrachloride uas muaj dithizone yuav tsum tau ntxuav ib zaug nrog sulfuric acid thiab ob zaug nrog distilled dej, thiab cov txheej dej yuav tsum tau muab pov tseg, qhuav nrog anhydrous calcium chloride, lim, distilled nyob rau hauv ib da dej ntawm 90 ~ 95 degree nyob rau hauv ib tug. rotary evaporator, thiab distillate ntawm 76 ~ 78 degree yuav tsum tau sau; Carbon tetrachloride uas muaj tooj liab reagent yuav tsum tau ntxuav ob zaug nrog dej distilled, qhuav nrog anhydrous calcium chloride, lim thiab distilled; Cov pa roj carbon tetrachloride uas muaj iodine yuav tsum tau nchuav nrog titanium trioxide kom txog thaum cov tshuaj tsis muaj xim, ces ntxuav ob zaug nrog dej distilled thiab muab pov tseg.

Cov teeb meem thiab kev daws teeb meem ntawm Rotovap

1. Q: Tom qab lub ntsuas hluav taws xob tau qhib, lub hwj chim taw qhia lub teeb tsis teeb.

A: Yog tias cov hlua hluav taws xob tsis txuas nrog lossis tsis raug, tsuas yog txuas lub hwj chim qaum; Yog tias lub hwj chim hloov lossis lub rooj tsav xwm tsis ua haujlwm, tsis txhob siv tam sim ntawd thiab tiv tauj cov chaw tsim khoom lossis cov neeg ua haujlwm tu.

2. Q: Lub cev muaj zog tsis tig.

A: Yog tias qhov taw qhia lub teeb ntawm lub txee hluav taws xob qhib, xyuas seb qhov kev sib txuas hauv thiab sab nraud ntawm lub txee hluav taws xob puas xoob lossis raug txiav, thiab tom qab ntawd ntsaws rau hauv lub ntsaws dua thiab txuas qhov kev sib txuas. Yog tias qhov taw qhia lub teeb lossis cov duab digital ntawm lub txee hluav taws xob tsis nyob, lub fuse yuav tsum tau hloov kho lossis cov khoom siv hluav taws xob yuav tsum tau lees paub tias yog qhov qub; Yog tias qhov hloov pauv zaus raug cuam tshuam los ntawm cov zaus siab thiab qhia "OU", tsuas yog teeb meem raws li phau ntawv hloov pauv zaus.

3. Q: Lub lauj kaub da dej tsis yog cua sov.

A: Lub teeb ntsuab qhia lub teeb nyob rau hauv qhov ntsuas kub yog qhib, tab sis nws tsis kub. Tus tswj qhov kub thiab txias qhia tau hais tias "tshaj" lossis "000", uas tuaj yeem daws tau los ntawm kev hloov lub nplhaib cua sov, cov khoom siv hluav taws xob relay lossis relay board thiab lub ntsuas kub, kuaj xyuas cov xaim ntawm kev sojntsuam lossis hloov kho qhov kev sojntsuam.

4. Q: Cov ntsiab lus xeem tsis tuaj yeem muab rho tawm los ntawm lub tshuab nqus tsev.

A: Nws muaj peev xwm muaj cov kuab tshuaj nyob rau hauv lub thawv thiab nws raug txwv los ntawm lub siab ntawm lub saturated ejector, yog li nws yuav tsum tau ntim cov kuab tshuaj thiab sim dua tom qab lub raj mis tas lawm; Lub peev xwm ntawm lub tshuab nqus tsev twj tso kua mis txo qis, yog li nws yuav tsum tau hloov cov roj (dej) thiab ntxuav thiab kho lub tshuab nqus tsev twj; Lub tshuab nqus tsev hose sib koom yog xoob, thiab lub tshuab nqus tsev vacuum xau, yog li nws yog qhov yuav tsum tau kuaj xyuas thiab tshem tawm qhov txhaum ntawm ntu raws li lub tshuab nqus tsev; Yog hais tias muaj sundries nyob rau hauv lub tso tawm valve thiab siab tswj valve, ntxuav lawv. Lub iav wool sandwich vaj huam sib luag puas lawm, yog li nws tuaj yeem hloov kho lossis kho dua tshiab.

5. Q: Lub twj tso kua mis tawm suab txawv txav.

A: Nws tuaj yeem hnav lub nplhaib sib khi, yog li tsuas yog hloov nws nrog ib qho tshiab; Nws tseem muaj peev xwm hais tias lub iav sab hauv yog hnav, qhov kev tsav tsheb yog luv ntawm cov roj, thiab lub cev muaj zog tsis txaus. Hauv qhov no, tsis txhob siv tam sim ntawd thiab tiv tauj peb ntawmsales@achievechem.com.

6. Q: Lub tshuab nqus tsev kawm ntawv qib siab tsis zoo.

A: Tej zaum nws yuav yog lub iav rotating ncej yog hnav, lub nplhaib sealing yog hnav, lub nplhaib sealing tsis zoo, lub sealing washer ntawm lub decompression gas nozzle yog laus, thiab lub tshuab nqus tsev hose yog laus. Tsuas yog hloov kho qhov teeb meem.

7. Q: lifting txawv txav.

A: Nws tuaj yeem yog lub rooj tsav xwm Circuit Court lossis lub cev muaj zogrotovap uayog tawm ntawm kev txiav txim, los yog zawv zawg bearing yog hnav los yog xeb. Nyob rau hauv cov ntaub ntawv no, tus neeg teb xov tooj yuav tsum tam sim ntawd nres lub lag luam ntawm lub twj paj nruag thiab hu rau cov kws kho cov neeg ua haujlwm.