Qhib alumina H2O2
1. Nqa dej yaug.
Tom qab kev sib tw dhau los ntawm cov pej thuam alkali (nrog cov tshuaj potassium carbonate daws sab hauv) kom tshem tawm cov kua qaub, nws nkag me me ntawm cov tshuaj potassium carbonate me me, thiab nkag mus rau hauv av av tom qab nag lossis daus thiab sib cais. Vim tias cov alumina qhib tau muaj qhov nqus tau zoo, cov lye seem yog adsorbed, yog li alkalinity ntawm cov kua ua haujlwm tau txo los ntawm 0.1g/L mus rau tsawg dua 0.005 g/L, thiab cov xwm txheej haum rau cov tshuaj tiv thaiv hydrogenation tau mus txog.
2. Nqus dej noo.
80% ntawm cov dej nkag rau hauv kev sib tw thiab cov dej uas tsim los ntawm kev sib cais ntawm hydrogen peroxide tau nqus los ntawm cov tshuaj potassium carbonate daws, thiab cov dej me me tau nqus los ntawm cov alumina ua ke nrog cov lye. Tom qab dhau lub txaj av nplaum dawb
Cov dej hauv cov dej ua haujlwm poob qis dua 3 ml/L, tab sis nrog kev txuas ntxiv ntawm kev pab lub neej, cov dej nqus dej ntawm cov alumina ua kom mus txog qhov siab, uas yog, kev nqus thiab tso tawm tswj qhov sib npaug, thiab nws cov dej nqus dej yuav tsis tseem ceeb. .
3. Decompose hydrogen peroxide.
Kev mloog zoo ntawm cov lye yog qhov tsim nyog, thiab lub peev xwm ntawm cov pej thuam alkali kom decompose raffinate hydrogen peroxide yog 60% txog 70%. Cov alumina qhib tau muaj peev xwm decompose hydrogen peroxide vim yog cov adsorption ntawm potassium carbonate tov.20%～ 30%. Piv txwv li, cov ntsiab lus hydrogen peroxide ntawm kev sib tw yog 0.2 g/L, tom qab dhau los ntawm cov pej thuam alkali, nws poob rau 0.06 ～ 0.08g/L, thiab tom qab dhau los ntawm cov av nplaum dawb, nws poob rau 0.042 ～ 0.056 g/ L.
4. Rov tsim dua cov khoom puas tsuaj. Cov av nplaum uas muaj hydrogen tuaj yeem rov tsim cov epoxide ntawm tetrahydro-2-ethylanthraquinone tsim tawm hauv cov tshuaj tiv thaiv oxidation, thiab tom qab kho ntawm cov av nplaum txaj tuaj yeem rov tsim dua 2-ethylanthracene tsim tawm hauv cov tshuaj tiv thaiv hydrogenation.
Ketone, 2-ethyl-10-hydroxyanthrone thiab lwm yam khoom ua kom puas tsuaj. Hauv cov chaw tsim khoom sib txawv, vim muaj cov sib txawv sib txawv ntawm cov khoom lag luam kev puas tsuaj, lub luag haujlwm ntawm alumina qhib tsis zoo ib yam. Yog li ntawd, tib qhov kev saib xyuas yuav tsum tau them rau hydrogenation thiab
Kev siv kho tom qab kho cov av nplaum dawb. Kev tsim cov khoom lag luam tsis zoo tuaj yeem ua rau poob ntawm anthraquinone kim, nce tus nqi tsim khoom, thiab txo peev txheej tsim khoom; nyob rau tib lub sijhawm, vim qhov nce ntawm tag nrho cov ntsiab lus ruaj khov hauv cov kua ua haujlwm, kev ua haujlwm
Kev nce hauv cov dej ntom ntom thiab viscosity txo cov oxidation thiab rho tawm cov txiaj ntsig, thiab cov txheej txheem nyuaj rau kev ua haujlwm; qee cov khoom siv ua kom dej tsis zoo tuaj yeem ua rau cov khoom lag luam dhau los ua daj thiab cov ntsiab lus ntawm cov pa roj carbon ntau ntxiv, uas tsis tsuas yog txo cov khoom lag luam zoo, tab sis kuj ua rau nws nce ntxiv.
Qhov nyuaj thiab txaus ntshai ntawm cov khoom ua kom zoo dua qub thiab ua kom muaj zog ntxiv.
5. Lim impurities.
Cov txheej txheej txheej txheej alumina muab tso rau ntawm cov av nplaum tuaj yeem lim cov dej ua haujlwm rau qee yam. Txawm li cas los xij, tom qab qhib alumina tau siv ntev, alumina tau sau rau hauv qab ntawm cov av nplaum
Muaj ntau qhov tsis tuaj yeem hloov pauv tsis tau, cov hmoov catalyst, alumina sludge thiab lwm yam tsis huv, yog li ua ntej hloov pauv alumina, cov dej ua haujlwm hauv cov av nplaum tsis tuaj yeem nias ncaj qha rau hauv qhov system, thiab yuav tsum tau muab tso rau hauv lub lauj kaub npaj kom huv.
Nws tuaj yeem rov ua dua tshiab tom qab raug ntxuav kom tiv thaiv kev sib kis ntawm tag nrho cov kab ke.
6. Purify hydrogen peroxide. Tom qab ntxuav cov av alkalinity ntawm activated alumina nrog cov dej ntshiab thiab kho nws nrog 0.5% txog 5% nitric acid tov, alumina tuaj yeem siv los ntxuav cov kua uas seem ntawm hydrogen peroxide hauv cov txheej txheem, thiab cov txiaj ntsig zoo heev.
Nws yog ib txoj hauv kev kom txuag hluav taws xob thiab txo kev noj thiab nce cov zis.