ʻO Tetrahydrofuran/CAS:109-99-9

ʻO Tetrahydrofuran, i hoʻopōkole ʻia ʻo THF, he hui organik heterocyclic. No ka papa ether, he huahana hydrogenated piha ia o ka hui ʻala furan. ʻO Tetrahydrofuran kekahi o nā ethers polar ikaika loa, i hoʻohana ʻia ma ke ʻano he mea hoʻoheheʻe polarity waena i nā hopena kemika a me ka unuhi ʻana. He wai kala ʻole a me ka volatile i ka mahana o ka lumi, me kahi ʻala like me ka ether. Hoʻoheheʻe ʻia i loko o ka hapa nui o nā mea hoʻoheheʻe organik e like me ka wai, ethanol, ether, acetone, a me benzene, ua kapa ʻia ʻo ia he "mea hoʻoheheʻe honua". I ka mahana o ka lumi, ua hui pū ʻia me ka wai, a hoʻohana kekahi mau mea kūʻai aku reagent kū ʻole i kēia e loaʻa ai ka waiwai nui ma ka hui ʻana i ka reagent tetrahydrofuran me ka wai. Ma muli o ke ʻano o THF e hana i nā peroxides i ka wā e mālama ai, hoʻohui pinepine nā huahana ʻoihana i ka antioxidant BHT. ʻO ka nui o ka wai ≤ 0.2%. Loaʻa iā ia nā ʻano o ka haʻahaʻa haʻahaʻa, ka paila haʻahaʻa, a me ka wai maikaʻi.

Hoʻohana

1. Hiki i ka spandex synthesis reaction o nā mea maka tetrahydrofuran ponoʻī ke polycondensation (ma o ka cation i hoʻomaka ʻia e ka polymerization apo-opening) i loko o polytetramethylene ether glycol (PTMEG), i ʻike ʻia hoʻi ʻo tetrahydrofuran homopolymerization ether. ʻO PTMEG a me toluene diisocyanate (TDI) i hana ʻia me ka abrasion-resistant, aila-resistant, hana haʻahaʻa-mahana, ikaika kiʻekiʻe o nā rubbers kūikawā; a me dimethyl terephthalate a me 1,4-butanediol i hana ʻia me nā mea polyether block polyester elastomer. ʻO ka nui molekala pili o ka PTT he 2,000. ʻO ka nui o ka molekala pili o 2000 PTMEG a me ka p-methylene bis (4-phenyl) diisocyanate (MDI) i hana ʻia me nā olonā elastic polyurethane (spandex, SPANDEX fiber), nā ʻōpala kūikawā a me kekahi mau mea maka uhi kūikawā. ʻO THF ka hoʻohana nui loa i hoʻohana ʻia no ka hana ʻana o PTMEG, e like me nā helu helu, ʻoi aku ma mua o 80% o ka THF o ka honua i hoʻohana ʻia no ka hana ʻana o PTMEG, a me PTMEG, a me PTMEG, a me PTMEG, a me PTMEG, a me PTMEG, a me PTMEG, a me PTMEG, a me PTMEG, a me PTMEG. Hoʻohana nui ʻia ʻo PTMEG, a me PTMEG no ka hana ʻana o nā olonā spandex elastic.
2. ʻO ka hana maikaʻi loa ka tetrahydrofuran solvent he mau solvents maikaʻi i hoʻohana pinepine ʻia, ʻoi aku hoʻi no ka hoʻoheheʻe ʻana i ka PVC, polyvinylidene chloride a me ka butylaniline, i hoʻohana nui ʻia ma ke ʻano he solvent no nā uhi ʻili, nā uhi anticorrosive, nā ʻīnika paʻi, nā lipine a me nā uhi kiʻiʻoniʻoni no ka electro-Chemicalbook Aluminum Plating Liquid hiki ke hoʻomalu i ka mānoanoa o ka alumini a me ka ʻālohilohi. ʻO ka uhi lipine magnetic, ka uhi ʻili PVC, ka hoʻomaʻemaʻe ʻana i ka reactor PVC, ka wehe ʻana i ka kiʻiʻoniʻoni PVC, ka uhi cellophane, ka ʻīnika paʻi plastik, ka uhi polyurethane thermoplastic, nā solvents no nā mea hoʻopili, hoʻohana nui ʻia i nā uhi ʻili, nā uhi pale, nā ʻīnika, nā mea unuhi a me nā mea mālama ʻili no ka ʻili hana synthetic.
3. Hoʻohana ʻia ma ke ʻano he mea maka no ka synthesis organik e like me nā lāʻau lapaʻau i hoʻohana ʻia i ka hana ʻana o tetrahydrothiophene, 1.4 - dichloroethane, 2.3 Hoʻohana ʻia ia e hana i ka tetrahydrothiophene, 1.4-dichloroethane, 2.3-dichlorotetrahydrofuran, valerolactone, butyrolactone a me pyrrolidone. I ka ʻoihana lāʻau lapaʻau, hoʻohana ʻia no ka synthesis o ka cough, Rifamycin, progesterone a me kekahi mau lāʻau hormone. Hoʻopuka ʻia ʻo Tetrahydrothiophenol e ka mālama ʻana o ka hydrogen sulfide, hiki ke hoʻohana ʻia ma ke ʻano he odorant i loko o ke kinoea wahie (nā mea hoʻohui ʻike), a ʻo ia hoʻi ka mea hoʻoheheʻe nui i ka ʻoihana lāʻau lapaʻau.
4. Nā Hoʻohana ʻē aʻe ʻO ka mea hoʻoheheʻe chromatographic (gel permeation chromatography), hoʻohana ʻia no ka ʻono kinoea kūlohelohe, ka mea hoʻoheheʻe no ka unuhi ʻana o ka acetylene, a me nā mea hoʻopaʻa māmā no nā mea polymer. Me ka hoʻohana ākea o ka tetrahydrofuran, ʻoi aku ka ulu wikiwiki o ka ʻoihana spandex o Kina i nā makahiki i hala iho nei, e hoʻonui ana ke koi o Kina no ka PTMEG, a ʻo ka hopena o ke koi no ka tetrahydrofuran he ʻano ulu wikiwiki hoʻi.

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