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 uvimbele 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 igxiliwe 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 ukuze kulungiswe 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 isisombululo.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, yawashwa izikhathi ezingu-2-3 nge-ether egcwele, 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 kwisixazululo esingenhla (100 mL) ngokushukumisa futhi ngaphansi kuka-20 ° C, ngokushesha ukuncibilika futhi exothermic.Ngemuva kwalokho i-100 ml ye-methanol yengezwe ngokugqugquzela futhi 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 kuka-9 g we-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.