Kuchokera kuzinthu zopangira, mtengo wa o-xylene wa Sinopec udakali wokhazikika mpaka pano, pamene msika wa naphthalene wa mafakitale, zopangira za naphthalene-based phthalic anhydride, ndizofooka ndipo mitengo ikupitiriza kutsika. Kutsika kwamitengo yamafuta kwafooketsa kuthandizira kwa mtengo wa phthalic anhydride, kupereka mwayi woti mtengo wa naphthalene-based phthalic anhydride ugwe.
Kuchokera pamalingaliro operekera ndi kufunikira, makampani a ortho-phthalic anhydride akugwira ntchito pamlingo wapamwamba, ndipo msika umakhala wokwanira, koma kufunikira kwapansi panthaka kumakhala kofooka, zomwe zadzetsa kusalinganika kwakukulu pakati pa kupereka ndi kufuna. Chifukwa chakusowa kokwanira pamsika wama terminal, kuchuluka kwamakampani opanga mapulasitiki otsika a phthalic anhydride sikunapezeke bwino mpaka Chaka Chatsopano chisanafike, ndipo kumwa kwa phthalic anhydride ndikochepa. Kukwera kwakukulu kwamakampani a phthalic anhydride kwadzetsa kuchulukirachulukira kwa kukakamiza kwazinthu. Pankhani yakuchulukirachulukira, mtengo wamsika wa phthalic anhydride uli pansi pamavuto otsika.
Pokhudzidwa ndi kusalinganika pakati pa kupezeka ndi kufunikira komanso kutsika kwamitengo, malingaliro amsika a phthalic anhydride awonetsanso kukhumudwa kwambiri. Amalonda ndi makampani akutsika akadali ndi chiyembekezo pa msika wamtsogolo ndipo ali ndi chidwi chogula chochepa. Pofuna kupewa zoopsa, makampani ena amasankha kuchepetsa kugula kapena kuchedwetsa mapulani ogula, zomwe zikuwonjezera mayendedwe amsika pamsika.
Kuyang'ana m'tsogolo, kukhudzidwa ndi kutsika kwakukulu kwa mtengo wa naphthalene yamafuta opangira mafakitale, mtengo wothandizira msika wa phthalic anhydride wafowoka, kuphatikiza ndi malingaliro amphamvu akudikirira ndikuwona pamsika, kutsika kwamitengo kwamitengo kwakanthawi kochepa ndikofunikira. Kusiyana kwamitengo ya phthalic anhydride kuchokera ku ortho-naphthalene kukuyembekezeka kukulirakulira, ndipo kukana kugulitsa msika ndikokulirapo. Mbali yogulitsira msika ikukumanabe ndi zovuta zina, zomwe zimatsitsanso mtengo wa phthalic anhydride. Panthawi imodzimodziyo, kufunikira kwa msika waukulu wa plasticizer kutsika kukupitirizabe kufooka, zomwe zimapangitsa kuti zikhale zovuta kupanga chithandizo chothandizira pamsika, ndipo zotsatira zotsutsana ndi zotsutsana zimakhalabe zosasintha. Ndi malingaliro osamala amakampani, msika wamalonda ukhoza kupitiliza kukhala wopepuka. Pazonse, chifukwa cha superposition ya zinthu zingapo zoipa monga thandizo losakwanira pa mbali ya mtengo, kufunikira kofooka ndi kukana kutumiza, zikuyembekezeka kuti pakati pa mphamvu yokoka ya msika wapakhomo wa phthalic anhydride idzapitirirabe kutsika kwakanthawi kochepa, ndipo machitidwe onse adzakhala ofooka makamaka.
Nthawi yotumiza: Mar-20-2025