Nā Koina Kōmike no Sodium formaldehyde sulphoxylate-Kitty

1.2 Nā mea waiwai a me nā koi ʻenehana:

ʻO Sodium metabisulfite (Na2S2O5): ʻOihana Papa I me kahi ʻike o> 64% (ma ke ʻano o SO2).

ʻOihana formaldehyde solution: papa mua a ʻelua paha.

ʻO ka pauka metala Zinc: 98% ka nui o ka zinc, ʻaʻole i emi iho ma mua o 94% ka metala zinc, ka pauka zinc me ke ano hina.

1.3 Kaʻina hana a me ka mana

ʻO ka hana ʻana o ka sodium formaldehydesulphoxylate e kēia ʻano hana ʻekolu kaʻina hana: hoʻoheheʻe-hoʻemi hoʻohui ʻana, paʻa-wai ka hoʻokaʻawale a me ka evaporation a me ka crystallization.

(1) Hoʻoheheʻe-hoʻemi hoʻohui ʻia: lawe ʻia ka hopena ma kahi porcelain-lined reactor me ka hoʻoulu ʻana.

Wahi a kekahi lākiō hoʻohui, sodium metabisulphite, wai, zinc Hoʻohui ʻia ka pauda a me ka solution formaldehyde i ka ipu hao, a me kekahi ka nui o nā mea hoʻohui e hoʻonui i ka wikiwiki o ka hopena a me ka hanauna o ka sodium formaldehydesulphoxylate. Ma hope o ka hoʻohui ʻia ʻana o nā mea a pau, ka hopena ua hoʻomehana ʻia e ka mahu i loko o ka ipu hao i hoʻopaʻa ʻia me ka hoʻoulu ʻana mau a me ka wela mau ke ka wela o ka hoʻonā i loko o ka ipu hao piʻi i ka 95°C.

Hoʻopili ʻia nā mea ma kahi o 2h a lawe ʻia nā laʻana no ka nānā ʻana.

ʻO ka hoohalike pane:

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

I ka wā o ka hopena, me ka hoʻopuka o ka sodium formaldehydesulphoxylate, ka pauda zinc i komo i ka hopena hoʻololi i ka zinc oxide a me ka zinc hydroxide.

I ka hoʻohui ʻia ʻana o ka pauka zinc i ka nui, aia nō ka liʻiliʻi o ka metala zinc a kapa mākou i kēia mea paʻa zinc sludge.

(2) Hoʻokaʻawale paʻa-wai: Ma hope o ka pau ʻana o ka hopena, ʻaʻole pololei hana ʻia ka hoʻolili ʻana me ka wai.

Hoʻemi ʻia ka mahana o ka mea ma lalo o 50 ° C no ka paʻa-wai kaawale ana. Ma muli o ke ʻano corrosive o ka hoʻonā, ka paʻa-wai Lawe ʻia ka hoʻokaʻawale ʻana me ka hoʻohana ʻana i kahi pāpaʻi pāpaʻi hydraulically pressurized kānana kiʻi. Hoʻopili ʻia ka kānana i ka pahu mālama wai kūpono. Ma hope ua wehewehe ʻia ka hoʻonā i loko o ka waihona no kekahi manawa a laila kānana ʻia ʻo ka lua o ka manawa e hāʻawi i kahi hopena maʻemaʻe maʻemaʻe no ka evaporation a hoʻopaʻa ʻana.

(3) Evaporation a me ka noonoo ana, hooluolu a crystallization: ka sodium ʻO ka waiʻona formaldehydesulphoxylate i loko o ka pahu hoʻopaʻa i hoʻoheheʻe ʻia i loko o ka ʻōpala moku hoʻoheheʻe ʻia e ka ʻūhā.

Hoʻomaʻamaʻa ʻole ʻia e ka mahu, ʻo ke kaʻina evaporation e hoʻomalu i ka mahana ma lalo o 65°C. I ka hiki ana o ka hookuonoono o ka solution i ka evaporator i ka pono, hoʻokomo ʻia ka concentrate i loko o ka crystalliser, hoʻoluʻu a crystallized ma ka lumi wela a me nā ʻāpana nui e ʻoki ʻia, a laila nā laʻana lawe ʻia a hoʻāʻo ʻia e like me ka maʻamau, a ʻo nā huahana kūpono paʻa.