7647-15-6

Sodium bromide, feem ntau yog siv hauv kev lag luam photosensitive rau kev npaj cov yeeb yaj kiab photosensitive kua; Siv nyob rau hauv cov tshuaj los tsim diuretics thiab sedatives; Siv hauv kev lag luam txuj lom los tsim cov txuj lom hluavtaws; Siv los ua tus neeg sawv cev brominating hauv kev lag luam luam ntawv thiab dyeing.

Cov ntaub ntawv ntawm lub cev

1. Cov tsos mob: Cov xim tsis muaj xim cubic siv lead ua lossis dawb granular hmoov. Odorless, nrog ib tug salty thiab me ntsis iab saj. 2. Ceev (g/mL, 25 degree): 3.203. 3. Melting point (º C): 755.

4. Boiling point (º C, atmospheric siab): 1390 degree . 5. Refractive Performance index: 1.6412. 6. Flash point (º C): 1390. 7. Solubility: Nws yog yooj yim soluble nyob rau hauv dej (nrog ib tug solubility ntawm 121g/100ml dej ntawm 100 degree), thiab cov aqueous tov yog nruab nrab. Me ntsis soluble hauv cawv. Ntawm 51 degree, anhydrous sodium bromide crystals precipitate los ntawm cov tshuaj, thiab qis dua 51 degree, dihydrate yog tsim. 905g / L (ntawm 20 º C)

Txoj kev khaws cia

1. Nws yuav tsum muab cia rau hauv qhov chaw qhuav, txias, thiab qhov cua zoo. Txhawm rau tiv thaiv kom tsis txhob raug tshav ntuj ncaj qha, cais tawm ntawm cov nplaim taws thiab qhov chaw kub, thiab tsis txhob sib xyaw thiab sib xyaw nrog ammonia, oxygen, phosphorus, antimony hmoov, thiab alkalis. Cia kom deb ntawm cov ntoo chips, shavings, straw, thiab lwm yam kom tsis txhob combustion.

2. Thaum hluav taws tshwm sim, cov xuab zeb thiab cov pa roj carbon dioxide tua hluav taws tuaj yeem siv los tua nws.

Synthetic method

Txoj kev txo urea dissolves ntshiab alkali (sodium carbonate) thiab urea hauv dej kub thiab xa mus rau hauv lub reactor. Bromine maj mam ntxiv rau cov tshuaj tiv thaiv los tsim sodium bromide. Tom qab ntawd ntxiv cov pa roj carbon activated rau decolorization, lim, evaporate thiab crystallize, centrifuge thiab cais, thiab qhuav kom tau sodium bromide tiav cov khoom. Qhov sib npaug ntawm cov tshuaj tiv thaiv yog raws li hauv qab no: txoj kev nruab nrab ntxiv txog 40% hydrobromic acid rau lub reactor, thiab maj mam ntxiv 40% caustic soda tov nyob rau hauv stirring rau neutralization. Thaum pH nce mus txog 7. Qhov sib npaug ntawm cov tshuaj tiv thaiv yog raws li nram no:

Sodium carbonate thiab urea yog yaj nyob rau hauv dej kub, bromine yog qhia, txo rau hauv sodium bromide, thiab ces activated carbon yog ntxiv rau decolorization, pom, evaporation, thiab crystallization kom tau.

Maj mam ntxiv sodium bicarbonate rau kev daws ntawm hydrobromic acid rau cov tshuaj tiv thaiv neutralization: tshav kub kom tshem tawm cov pa roj carbon dioxide thiab mloog zoo rau cov tshuaj kom txog thaum nws crystallizes, ces txias rau chav tsev kub. Dissolve lub precipitated crystals nyob rau hauv ib tug me me npaum li cas ntawm cov dej thiab ntxiv bromine dej dropwise kom txog thaum cov xim ntawm bromine cia li tshwm. Ntxiv cov tshuaj hydrogen sulfide rau decolorization, tshav kub thiab evaporate cov concentrated crystals kom txog thaum qhuav, thiab precipitate anhydrous bromide ntawm qhov kub thiab txias. Tom qab rwb thaiv tsev thiab ziab ntawm 110 degree, txias hauv lub tshuab ziab khaub ncaws kom tau txais cov dej tsis muaj bromide.