Thiourea, yokhala ndi mamolekyu a (NH2) 2CS, ndi orthorhombic yoyera kapena acicular yowala kristalo.Njira zamafakitale zopangira thiourea ndi monga njira ya amine thiocyanate, njira ya nayitrogeni ya laimu, njira ya urea, ndi zina zotero. Mu njira ya laimu ya nayitrogeni, laimu wa nayitrogeni, mpweya wa hydrogen sulfide ndi madzi amagwiritsidwa ntchito popanga hydrolysis, kuwonjezera kuchita, kusefera, crystallization ndi kuyanika mu kaphatikizidwe. ketulo kuti mupeze chomaliza.Njirayi ili ndi ubwino woyenda pang'onopang'ono, palibe kuipitsa, mtengo wotsika komanso khalidwe labwino la mankhwala.Pakalipano, mafakitale ambiri akugwiritsa ntchito njira ya lime nitrogen kukonzekera thiourea.
Kuchokera pamsika, China ndiye mlimi wamkulu wa thiourea padziko lonse lapansi.Kuphatikiza pakukwaniritsa zofuna zapakhomo, zogulitsa zake zimatumizidwanso ku Japan, Europe, United States, Southeast Asia ndi mayiko ena ndi zigawo.Pankhani yogwiritsira ntchito kumunsi kwa mtsinje, thiourea imagwiritsidwa ntchito kwambiri ngati zida zopangira mankhwala ophera tizilombo, mankhwala, mankhwala apakompyuta, zowonjezera mankhwala, komanso wothandizira golide.
M'zaka zaposachedwa, kupanga kwa thiourea ku China kwakula pang'onopang'ono, ndi mphamvu ya matani 80,000 / chaka ndi oposa 20 opanga, omwe oposa 90% ndi opanga mchere wa barium.
Ku Japan, pali makampani atatu omwe amapanga thiourea.M'zaka zaposachedwa, chifukwa cha kuchepa kwa ore, kuwonjezeka kwa ndalama zamagetsi, kuwonongeka kwa chilengedwe ndi zifukwa zina, kutulutsa kwa barium carbonate kwatsika chaka ndi chaka, zomwe zimapangitsa kuchepetsa kupanga hydrogen sulfide, yomwe imachepetsa kupanga thiourea.Ngakhale kukula kwachangu kwa msika, mphamvu zopangira zimachepetsedwa kwambiri.Kutulutsa kwake kuli pafupifupi matani 3000 / chaka, pomwe kufunikira kwa msika kuli pafupifupi matani 6000 / chaka, ndipo kusiyana kumatumizidwa kuchokera ku China.Pali makampani awiri ku Europe, SKW Company ku Germany ndi SNP Company ku France, zomwe zimatulutsa matani 10,000 pachaka.Ndi kukula kosalekeza kwa thiourea mu mankhwala ophera tizilombo ndi ntchito zina zatsopano, The Netherlands ndi Belgium akhala ogula kwambiri a thiourea.Msika wamsika wapachaka ku Msika waku Europe ndi pafupifupi matani 30,000, pomwe matani 20,000 amafunika kutumizidwa kuchokera ku China.Kampani ya ROBECO ku United States imakhala ndi chiwongola dzanja chapachaka cha thiourea pafupifupi matani 10,000 / chaka, koma chifukwa chakuchulukirachulukira kwachitetezo cha chilengedwe, kutulutsa kwa thiourea kumachepa chaka ndi chaka, zomwe sizikugwirizana ndi zomwe msika ukufunikira.Iyenera kuitanitsa matani opitilira 5,000 a thiourea kuchokera ku China chaka chilichonse, omwe amagwiritsidwa ntchito kwambiri popha tizilombo, mankhwala ndi madera ena.
Nthawi yotumiza: Apr-17-2023