Zveunyanzvi Zvinodikanwa zveSodium formaldehyde sulphoxylate-Kitty

1.2 Raw zvinhu uye zvinodiwa zvehunyanzvi:

Sodium metabisulfite (Na2S2O5):Industrial Giredhi I ine zvemukati> 64% (maererano neSO2).

Industrial formaldehyde solution: yekutanga kana yechipiri giredhi.

Zinc simbi poda: 98% yakazara zingi, kwete isingasviki 94% zinc simbi, zinc poda ine grey chitarisiko.

1.3 Maitiro ekugadzira uye kutonga

Kugadzirwa kwesodium formaldehydesulphoxylate neiyi nzira kunonyanya kusanganisa maitiro matatu: kunyungudika-kuderedza kuwedzera maitiro, kupatsanurwa kwakasimba-mvura uye kubuda uye crystallization.

(1) Dissolution-reduction addition reaction: maitiro anoitwa mune porcelain-lined reactor ine inomutsa.

Zvinoenderana nechimwe cheyero yemetabisulphite, mvura, zinc poda uye formaldehyde mhinduro inowedzerwa kune kettle yekuita, uye imwe huwandu hwekuwedzera inowedzerwa kuti ikurumidze kuita nekukurumidza uye chizvarwa chesodium formaldehydesulphoxylate. Mushure mokunge zvinhu zvose zvawedzerwa, mhinduro yacho inopisa zvisina kunanga nemhepo muvharo yakavharwa yakavharwa ine nguva dzose inokurudzira uye inotonhora nguva dzose apo kutonhora kwemushonga muketero kunokwira kusvika 95 ° C.

Zvishandiso zvinoitwa around2h uye sampuli dzinotorwa kuti dziongororwe.

Mhinduro equation yaive:

Na2S2O5+2Zn+2CH2O+6H2O=2NaHSO2-CH2O-2H2O+ZnO↓+Zn(OH)2↓

Munguva yekupindura, kunze kwekubuda kwesodium formaldehydesulphoxylate, zinc poda inobatanidzwa mukuita inoshandurwa kuita zinc oxide uye zinc hydroxide.

Sezvo zinc poda inowedzerwa yakawandisa, kuchine hushoma hwesimbi zinc uye isu tinodaidza iyi yakasimba nyaya zinc sludge.

(2) Kuparadzana kwakasimba-mvura: Mushure mekuita kwapera, kutonhora kusina kunanga kunoitwa nemvura.

Kupisa kwechinhu chacho kunoderedzwa kusvika pasi pe50 ° C kuitira kuparadzaniswa kwakasimba-mvura. Nekuda kwekuora kwemhinduro, iyo yakasimba-yemvura kupatsanurwa kunoitwa uchishandisa hydraulically yakadzvanywa epurasitiki ndiro rubber furemu sefa. Iyo filtrate inopombwa kune inokwanisa kuchengetedza mvura tangi. Mushure mekunge mhinduro yacho yajekeswa mudura kweimwe nguva uye yozosefa kechipiri kuti ipe mhinduro yakachena yakajeka yekubuda uye kuisa pfungwa.

(3) Evaporation uye kuisa pfungwa, kutonhora uye crystallization: iyo sodium formaldehydesulphoxylate solution mutangi rekuchengetedza inoputirwa mumudziyo wevacuum evaporation nekuputira.

Zvisina kunanga kupiswa nechitsinga, maitiro evaporation anodzora tembiricha iri pasi pe65°C. Kana iyo yekumisikidzwa kwemhinduro mu evaporator ichisvika pane zvinodiwa, iyo yekusimbisa inoiswa mucrystalliser, yakatonhodzwa uye yakanyungudutswa pakupisa kwekamuri uye zvimedu zvihombe zvakapwanyika, ipapo masampuli anotorwa nekuyedzwa zvinoenderana nechiyero, uye zvigadzirwa zvinogoneka. packed.