izindaba

1. Indlela yokumuncwa:
Gcoba igesi ye-hydrogen sulfide ngesisombululo se-alkali sulfide (noma isisombululo se-caustic soda). Ngenxa yokuthi igesi ye-hydrogen sulfide inobuthi, ukusabela kokumuncwa kufanele kwenziwe ngaphansi kwengcindezi engemihle. Ukuze kuvinjelwe ukungcoliswa komoya okuphezulu nge-hydrogen sulfide kugesi yokukhipha umoya, ama-absorber amaningana asetshenziswa ochungechungeni ekukhiqizeni, futhi okuqukethwe kwe-hydrogen sulfide kuncishiswa kube sezingeni eliphansi ngemva kokumuncwa okuphindaphindiwe. I-liquid yokumuncwa igxilile ukuze kutholakale i-sodium hydrosulfide. Ifomula yayo yamakhemikhali:
H2S+NaOH→NaHS+H2O
I-H2S+Na2S→2NaHS

2. I-sodium alkoxide ihlangana ne-hydrogen sulfide eyomile ukulungisa i-sodium hydrosulfide:
Eflaskini engu-150mL enepayipi legatsha, engeza u-20mL we-ethanol ephelele esanda kugaywa kanye no-2g wezingcezu zensimbi ze-sodium ezinobuso obushelelezi obungenawo ungqimba lwe-oxide, faka i-reflux condenser nepayipi elomisa kufulaski, bese uvala ipayipi legatsha kuqala. Uma i-sodium alkoxide iginqika, engeza cishe u-40 ml we-ethanol ephelele ngamaqoqo kuze kube yilapho i-alkoxide ye-sodium ichitheka ngokuphelele.
Faka ishubhu lengilazi ngqo phansi kwesisombululo ngepayipi legatsha, bese udlulisa igesi eyomile ye-hydrogen sulfide (qaphela ukuthi awukho umoya ongangena eflaskini epayipini legatsha elivaliwe). Gcwalisa ikhambi. Isixazululo sahlungwa ukuze kukhishwe imvula. I-filtrate yagcinwa kuflask eyomile eyiconical, kwaphinde kwengezwa u-50 mL we-ether ephelele, futhi inani elikhulu lemvula emhlophe ye-NaHS lanetha ngokushesha. Kudingeka isamba esingaba ngu-110 mL we-ether. Imvula yahlungwa ngokushesha, yagezwa izikhathi ezingu-2-3 nge-ether ephelele, yasulwa yomile, futhi yafakwa ku-vacuum desiccator. Ukuhlanzeka komkhiqizo kungafinyelela ubumsulwa bokuhlaziya. Uma kudingeka ubumsulwa obuphakeme be-NaHS, ingancibilika ku-ethanol futhi yenziwe kabusha nge-ether.

3.I-sodium hydrosulfide liquid:
Chaza i-sodium sulfide nonahydrate emanzini asanda kufakwa isitimu, bese uncibilikisa kusixazululo se-Na2S (W/V) esingu-13%. I-14 g ye-sodium bicarbonate yengezwe kusixazululo esingenhla (100 mL) ngokushukumisa nangaphansi kuka-20°C, ihlakazeka ngokushesha futhi iqhume. Ngemuva kwalokho i-100 ml ye-methanol yengezwe ngokuxubha futhi ibe ngaphansi kuka-20 ° C. Kuleli qophelo i-exotherm yaphinde yaba ne-exothermic futhi cishe yonke i-crystalline sodium carbonate yawa ngokushesha. Ngemuva kwemizuzu engu-0, ingxube yahlungwa ngokumuncwa futhi okusele kwagezwa nge-methanol (50 ml) ngezingxenye. I-filtrate yayiqukethe okungengaphansi kwe-9 g ye-sodium hydrosulfide futhi hhayi ngaphezu kwamaphesenti angu-0.6 we-sodium carbonate. Ukugxila kokubili kungamagremu angu-3.5 no-0.2 amagremu ku-100 ml yesisombululo, ngokulandelana.

Ngokuvamile siyilungiselela ngokumunca i-hydrogen sulfide nesisombululo se-sodium hydroxide. Lapho okuqukethwe (ingxenye enkulu ye-sodium hydrosulfide) ingu-70%, i-dihydrate futhi isesimweni sama-flakes; uma okuqukethwe kuphansi, kungumkhiqizo owuketshezi, kungama-Hydrate amathathu.