Tetrahydrofuran

Tetrahydrofuran, THF pōkole, he mea hoʻohuihui heterocyclic. No ka papa ether, ʻo ia ka mea ʻala furan piha hydrogenation huahana.

ʻO Tetrahydrofuran kekahi o nā polar ethers ikaika loa. Hoʻohana ʻia ʻo ia ma ke ʻano he mea hoʻoheheʻe polar waena i nā hopena kemika a me ka unuhi. He wai hoʻoheheʻe kala ʻole i ka lumi wela a he ʻala like me ka ether. Hiki ke hoʻoheheʻe ʻia i ka wai, ethanol, ether, acetone, Chemicalbook benzene a me nā mea hoʻoheheʻe kūlohelohe ʻē aʻe, i kapa ʻia ʻo "universal solvent". Ma ka lumi wela a me ka wai hiki ke 'āpana miscible, kekahi 'oihana reagent kanawai e hoohana i keia wahi i tetrahydrofuran reagent wai profiteer. Ma muli o ka manaʻo o THF e hana i nā peroxides i ka mālama ʻana, hoʻohui pinepine ʻia ka BHT antioxidant i nā huahana ʻoihana. ʻO ka wai maʻemaʻe ≦0.2%. Loaʻa iā ia nā hiʻohiʻona o ka haʻahaʻa haʻahaʻa, haʻahaʻa ka paila a me ka wai maikaʻi.

Nā waiwai kemika:wai aniani ʻaʻole waihoʻoluʻu, me ka ʻala etera. Hoʻohui ʻia me ka wai, ka waiʻona, ketone, benzene, ester, ether, a me nā hydrocarbons.

Nā noi nui:

1. Nā mea maka o ka spandex synthesis reaction:

Hiki i ka Tetrahydrofuran ke lilo i polycondensation (ma ka cationic ring-open repolymerization) i polytetramethylene ether diol (PTMEG), i ʻike ʻia ʻo tetrahydrofuran homopolyl. ʻO ka PTMEG a me ka toluene diisocyanate (TDI) i hanaʻia i ke kū'ēʻana i kaʻaʻahu, kaʻaila kū'ē, ka hana haʻahaʻa haʻahaʻa, ka ikaika kiʻekiʻe o ke kāpili kūikawā; Ua hoʻomākaukau ʻia nā mea elastic polyether polyester elastic me ka dimethyl terephthalate a me 1, 4-butanediol. ʻO ka PTMEG me ke kaumaha molekala pili o 2000 a me ka p-methylene bis (4-phenyl) diisocyanate (MDI) e hana i ka polyurethane elastic fiber (SPANDEX fiber), ka pulupulu kūikawā a me kekahi kumu kūikawā e uhi ana i nā mea maka. ʻO ka hoʻohana nui loa o THF no ka hana ʻana o PTMEG. Wahi a nā ʻikepili koʻikoʻi, ma kahi o 80% o ka THF honua i hoʻohana ʻia no ka hana ʻana o PTMEG, a hoʻohana nui ʻia ʻo PTMEG no ka hana ʻana i ka fiber spandex.

2. Solvent me ka hana maikaʻi loa:

ʻO Tetrahydrofuran he mea hoʻohana maikaʻi loa ia, ʻoi aku ka kūpono no ka hoʻopau ʻana i ka PVC, polyvinylidene chloride a me butyl aniline, hoʻohana nui ʻia e like me ka uhi ʻana o ka ʻili, ka uhi anticorrosive, ka inika paʻi, ka lipine a me ka mea hoʻoheheʻe kiʻi ʻoniʻoni, me ka Chemicalbook i ka electroplating alumini wai hiki ke hoʻomalu i ka mānoanoa o ka papa alumini. ʻO ka mea hoʻoheheʻe no ka uhi lipine, ka uhi ʻana o ka PVC, ka hoʻomaʻemaʻe PVC reactor, ka wehe ʻana i ka kiʻiʻoniʻoni PVC, ka uhi cellophane, ka ʻīnika paʻi paʻi, ka polyurethane coating thermoplastic, adhesive, hoʻohana mau ʻia i nā uhi ʻili, nā pale pale, nā inika, nā extractants a me nā mea lapaʻau ʻili no ka ʻili synthetic.

3. Hoʻohana ʻia e like me nā mea maka no ka synthesis organik e like me nā lāʻau lapaʻau:

No ka hana ʻana i ka tetrahydrothiophene, 1.4-dichloroethane, 2.3-dichlorotetrahydrofuran, valerolactone, butyl lactone a me pyrrolidone. I ka ʻoihana lāʻau lapaʻau, hoʻohana ʻia ia i ka synthesis o coughbixin, rifumycin, progesterone a me kekahi mau lāʻau hormone. Hana ʻia ʻo Tetrahydrothiophenol e ka mālama ʻana i ka hydrogen sulfide, hiki ke hoʻohana ʻia ma ke ʻano he mea ʻala i ke kinoea wahie (identification additive), a ʻo ia hoʻi ka mea hoʻoheheʻe nui i ka ʻoihana lāʻau.

4. Nā hoʻohana ʻē aʻe:

ʻO Chromatographic solvent (gel permeation chromatography), hoʻohana ʻia no ka ʻono kinoea maoli, acetylene extraction solvent, polymer material light stabilizer, etc.

Poino:ʻO Tetrahydrofuran no ka papa 3.1 inflammable wai me ka haʻahaʻa flash point, loa flammable, hiki i ka mahu ke hana i ka hui pahū me ka ea, ka palena pahū he 1.5% ~ 12% (nui ka hapa), me ka huhū. ʻO kona ʻano hoʻopau ʻana he pilikia palekana. ʻO ka hopohopo palekana nui loa me THFS ʻo ia ka lohi o ka hoʻokumu ʻana o nā peroxide organik pahū i ka wā e ʻike ʻia ai i ka ea. No ka hōʻemi ʻana i kēia pilikia, hoʻohui pinepine ʻia ʻo THFS i loaʻa i nā mea kūʻai aku me ka 2, 6-di-tert-butylp-cresol (BHT) e kāohi i ka hana ʻana o nā peroxide organik. I ka manawa like, ʻaʻole pono e hoʻomaloʻo ʻia ka THF no ka mea e hoʻopili ʻia nā peroxide organik i ke koena distillation.

Nā hana mālama:ka hana paʻa ʻana, ka ea piha. Pono nā mea hana e hoʻomaʻamaʻa kūikawā a mālama pono i nā kaʻina hana. Manaʻo ʻia e hoʻohana nā mea hoʻohana i ka mask gas type filter (half mask), nā aniani pale palekana, nā lole anti-static, a me nā mīkina lima pale ʻaila. E mālama i ke ahi, ke kumu wela, ʻaʻole puhi i ka wahi hana. E hoʻohana i nā ʻōnaehana hoʻoheheʻe pahū a me nā mea hana. Kāohi i ka mahu ʻana i ka ea wahi hana. E hōʻalo i ka pili ʻana me nā mea ʻokikene, nā waikawa a me nā kumu. Pono e hoʻomalu ʻia ka kahe kahe ʻana i ka wā o ka hoʻopiha ʻana, a pono e loaʻa kahi mea hana e pale ai i ka hōʻiliʻili electrostatic. I ka lawelawe ʻana, pono e hana ʻia ka hoʻouka māmā ʻana a me ka wehe ʻana i mea e pale ai i ka pōʻino o ka pahu a me nā ipu. Hoʻolako ʻia me nā ʻano like ʻole a me ka nui o nā lako ahi a me nā lako lapaʻau ulia pōpilikia. Loaʻa paha ke koena pōʻino i kahi pahu hakahaka.

Nā mālama mālama:ʻO ka mea maʻamau, loaʻa i ka mea kūʻai kahi mea hoʻokae. E kūʻai i loko o kahi hale kūʻai maʻalili. E mālama i ke ahi a me ka wela. ʻAʻole pono ka mahana o ka hale waihona ma mua o 30 ℃. Pono e hoʻopaʻa ʻia ka pūʻolo a ʻaʻole pili i ka ea. Pono e hoʻokaʻawale ʻia mai nā oxidizers, acids a me nā kumu, a ʻaʻole pono e hui ʻia. Hoʻohana ʻia nā kukui pahū a me nā ʻoihana ea. Mai hoʻohana i nā mea hana mechanical a me nā mea hana e maʻalahi i ka ʻā. Pono e hoʻolako ʻia ka wahi mālama me nā lako lapaʻau ulia pōpilikia a me nā mea paʻa kūpono.

Packaging: 180KG / pahu