izindaba

1. Indlela yokuvuma:
Hlunga i-hydrogen sulfide gesi nge-alkali sulfide solution (noma isixazululo se-caustic soda). Ngoba igesi ye-hydrogen sulfide igesi inobuthi, ukusabela kokutholwa kufanele kwenziwe ngaphansi kwengcindezi engemihle. Ukuze uvikele ukungcoliswa okuphezulu komoya nge-hydrogen sulfide kugesi ophelelwe yi-hydrogen, abathintekayo basebenza ngochungechunge ekukhiqizweni, futhi okuqukethwe kwe-hydrogen sulfide kuncishiswa kube yileveli ephansi ngemuva kokufakwa okuphindaphindwayo ngemuva kokufakwa okuphindaphindwayo. Uketshezi lokutholwa lugxile ekutholeni i-sodium hydrosulfide. Ifomula yayo yamakhemikhali:
H2s + naoh → nahs + h2o
H2S + NA2S → 2Nahs

2. I-Sodium Alkoxide iphendula nge-hydrogen sulfide eyomile ukulungiselela i-sodium hydrosulfide:
Ku-Flask engu-150ml ngepayipi legatsha, engeza i-20ml ye-ethanol esokisile ebhujiwe kanye ne-2g yezingcezu ze-metal sodium ngenhlamvu ebushelelezi futhi ufake ipayipi le-oxide, bese ubeka ipayipi le-reflux bese ubopha ipayipi legatsha kuqala. Lapho i-alkoxide ye-sodium inembe, engeza cishe ama-40 ml we-ethanol ngokuphelele kuma-batches kuze kube yilapho i-sodium alkoxide ichithwa ngokuphelele.
Faka i-tube yengilazi ngqo ezansi kwesisombululo ngepayipi legatsha, bese udlula i-hydrogen sulfide gesi (Qaphela ukuthi akukho moya ongangena ngeflask epanini legatsha elivaliwe). Sihlupha ikhambi. Isixazululo sasihleliwe sokuhlunga ukuze sisuse i-precipitate. I-filtrate igcinwe ku-flask esomile ye-conical, kwathi kwangezwa ama-50 ml angu-50 we-ether ngokuphelele, futhi inani elikhulu le-nahs emhlophe ye-nahs yenziwe ngokushesha. Ingqikithi ye-110 ml ye-ether iyadingeka. I-fireputate yahlungwa ngokushesha, yageza izikhathi ezingama-2-3 nge-ether ephelele, eyomile esomileyo, futhi ibekwe kwi-vacuum desiccator. Ubumsulwa bomkhiqizo bungafinyelela ubumsulwa bokuhlaziya. Uma kudingeka ama-Nahs aphezulu okuhlanza aphezulu, kungachithwa e-ethanol futhi ahlaziswe kabusha nge-ether.

3.Sodium hydrosulfide uketshezi:
Dissolve sodium sulfide noninahydrate ngamanzi asanda kuthathwa amanzi, bese uwafaka ku-13% NA8S (W / V) Solution. I-14 g yeSodium Bicarbonate yengezwe kuleso sixazululo esingenhla (100 ml) ngokuvusa naphansi kwama-20 ° C, ukuncibilika ngokushesha kanye nokuxoxisana. Ngemuva kwalokho i-100 ml ye-methanol yengezwe ngokuvusa naphansi kwama-20 ° C. Ngalesi sikhathi lapho i-exotherm yaphinde yaxolisa futhi cishe yonke i-crystalline sodium carbonate yavela ngokushesha. Ngemuva kwemizuzu engu-0, le ngxube yahlungwa ngokumunca kanye nezinsalela yagezwa nge-methanol (50 ml) ezingxenyeni ezithile. I-filtrate ayizange ibe ngaphansi kwama-9 g we-sodium hydrosulfide futhi hhayi ngaphezulu kwamaphesenti angama-0.6 ama-sodium carbonate. Ukugxila kwalokhu okubili kumayelana namagremu ayi-3.5 kanye nama-0,2 amagremu nge-100 ml yesixazululo, ngokulandelana.

Imvamisa siyilungiselela ngokuthola i-hydrogen sulfide ngesisombululo se-sodium hydroxide. Lapho okuqukethwe (ingxenyana enkulu ye-sodium hydrosulfide) ngu-70%, kuyinto e-dihydrate futhi isesimweni sama-flakes; Uma okuqukethwe kuphansi, kungumkhiqizo owuketshezi, yi-hydrate emithathu.