Ko te ethylene glycol monomethyl ether (e whakarāpopototia ana ko te MOE), e mōhiotia ana ko te ethylene glycol methyl ether, he wai mārama, kāore he tae, ka taea te whakaranu ki te wai, te waipiro, te waikawa acetic, te acetone me te DMF. Hei whakarewa nui, ka whakamahia whānuitia te MOE hei whakarewa mō ngā momo hinu, ngā acetate cellulose, ngā nitrates cellulose, ngā tae wairewa-waipiro me ngā kapia hangai.

whakataki taketake

2-Methoxyethanol
CAS 109-86-4
Tau CBN: CB4852791
Tātai ngota: C3H8O2
taumaha ngota: 76.09
Te pūwāhi rewa: -85°C
Te pūwāhi koropupū: 124-125°C (i roto i te reo Pākehā)
Kiato: 0.965g/mL i te 25°C (i te rama)
Pēhanga hau: 6.17mmHg (20°C)
Taupū whakaata: n20/D1.402(lit.)
Pūwāhi mura: 115°F
Ngā tikanga rokiroki: Penapena i te +5°C ki te +30°C

Tono whakaputa

1. Tikanga whakarite

I ahu mai i te tauhohenga o te ethylene oxide me te methanol. Tāpirihia te methanol ki te matatini boron trifluoride ether, ka tukuna te ethylene oxide ki te 25-30°C me te whakaoho. Kia oti te whakawhiti, ka piki aunoa te pāmahana ki te 38-45°C. Ka rongoatia te otinga tauhohenga hua ki te potassium hydrocyanide - Whakakorehia te otinga methanol ki te pH=8-9. Kohia te methanol, whakawetehia, ka kohia ngā wāhanga i mua i te 130°C kia whiwhi ai i te hua mata. Kātahi ka whakahaerehia te whakawete wāhanga, ka kohia te wāhanga 123-125°C hei hua oti. I roto i te whakaputanga ahumahi, ka tauhohehia te ethylene oxide me te methanol anhydrous ki te pāmahana me te pēhanga teitei me te kore he whakakorikori, ā, ka taea te whiwhi i tētahi hua hua nui.

2. Ngā whakamahinga matua

Ka whakamahia tēnei hua hei whakarewa mō ngā momo hinu, lignin, nitrocellulose, cellulose acetate, tae wairewa-waipiro me ngā kapia hangai; hei matū mō te whakatau i te rino, te whanariki me te waro disulfide, hei waimeha mō ngā paninga, me te cellophane. I roto i ngā hiri takai, ngā wanihi maroke tere me ngā enamel. Ka taea hoki te whakamahi hei kaihoko wero me te kaihoko whakataurite i roto i te umanga tae, hei kirihou me te whakamārama rānei. Hei takawaenga i roto i te hanga o ngā matū waro, ko te ethylene glycol monomethyl ether te nuinga e whakamahia ana i roto i te hanga o te acetate me te ethylene glycol dimethyl ether. Koia hoki te rauemi mata mō te hanga o te bis(2-methoxyethyl) phthalate plasticizer. Ko te ranunga o te ethylene glycol monomethyl ether me te glycerin (ether: glycerin = 98:2) he tāpiri wahie rererangi hōia ka taea te ārai i te hukapapa me te waikura huakita. Ina whakamahia te ethylene glycol monomethyl ether hei kaihoko whakakore rahi wahie rererangi, ko te nui o te tāpiri whānui he 0.15% ± 0.05%. He pai tōna āhua wai-whakaaro. Ka whakamahia e ia tōna ake rōpū hydroxyl i roto i te wahie hei taunekeneke me ngā iti noa o ngā ngota wai i roto i te hinu. Mā te hanganga o te hononga hauwai, me tōna ira tio tino iti, ka whakaiti i te ira tio o te wai i roto i te hinu, ka taea ai e te wai te whakapūpū hei huka. He tāpiringa ārai-pūmua hoki te ethylene glycol monomethyl ether.

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