Ho hlokometsoe hore litheko tsa lihlahisoa tsa lik'hemik'hale 'marakeng li tsoela pele ho theoha, e leng se lebisang ho se leka-lekaneng ha boleng mahokelong a mangata a ketane ea indasteri ea lik'hemik'hale. Litheko tse phahameng tsa oli tse tsitsitseng li ekelitse khatello ea litšenyehelo ho ketane ea indasteri ea lik'hemik'hale, 'me moruo oa tlhahiso ea lihlahisoa tse ngata tsa lik'hemik'hale o fokola. Leha ho le joalo, theko ea 'maraka ea vinyl acetate le eona e bile le ho theoha ho tsoelang pele, empa phaello ea tlhahiso e ntse e le holimo' me moruo oa tlhahiso o motle. Kahoo, ke hobane'ng ha e kavinyl acetatemaraka boloka boemo bo phahameng ba nala?

Ho tloha bohareng ba Phuptjane 2023, theko ea 'maraka ea vinyl acetate ke 6400 yuan/ton. Ho ea ka litekanyetso tsa theko ea lisebelisoa tse tala bakeng sa mokhoa oa ethylene le mokhoa oa calcium carbide, phaello ea phaello ea mokhoa oa ethylene vinyl acetate e ka ba 14%, ha phaello ea phaello ea mokhoa oa calcium carbide vinyl acetate e boemong ba tahlehelo. Ho sa tsotellehe ho theoha ho tsoelang pele ha theko ea vinyl acetate ka selemo, phaello ea phaello ea ethylene e thehiloeng vinyl acetate e ntse e le holimo, e fihla holimo ho 47% maemong a mang, e fetoha sehlahisoa se phahameng ka ho fetisisa sa phaello har'a lik'hemik'hale tse ngata. Ka lehlakoreng le leng, mokhoa oa calcium carbide oa vinyl acetate o bile boemong ba tahlehelo boholo ba lilemo tse peli tse fetileng.

Ka ho sekaseka liphetoho tsa meketjana ea phaello ea ethylene based vinyl acetate le calcium carbide based vinyl acetate, ho fumaneha hore ethylene based vinyl acetate esale e na le phaello lilemong tse 'maloa tse fetileng, ka phaello e phahameng ka ho fetesisa e fihlang ho 50% kapa ka holimo le ka karolelano. phaello ea phaello e ka bang 15%. Sena se bontša hore ethylene based vinyl acetate e bile chelete e ngata lilemong tse peli tse fetileng, ka katleho e ntle ka kakaretso le menyetla e tsitsitseng ea phaello. Lilemong tse peli tse fetileng, ntle le phaello e kholo ho tloha ka Hlakubele 2022 ho isa Phupu 2022, mokhoa oa calcium carbide oa vinyl acetate o bile boemong ba tahlehelo ka linako tse ling kaofela. Ho tloha ka Phuptjane 2023, tekanyo ea phaello ea mokhoa oa calcium carbide vinyl acetate e ne e le tahlehelo e ka bang 20%, 'me karolelano ea phaello ea mokhoa oa calcium carbide vinyl acetate lilemong tse peli tse fetileng e bile tahlehelo ea 0.2%. Ho tloha ho sena, ho ka bonoa hore katleho ea mokhoa oa calcium carbide bakeng sa vinyl acetate e futsanehile, 'me boemo ba kakaretso bo bontša tahlehelo.

Ka tlhahlobo e eketsehileng, mabaka a ka sehloohong a phaello e phahameng ea tlhahiso ea ethylene e thehiloeng ho vinyl acetate ke a latelang: pele, karolo ea litšenyehelo tsa thepa e tala lits'ebetsong tse fapaneng tsa tlhahiso ea fapana. Ka mokhoa oa ethylene oa vinyl acetate, tšebeliso ea yuniti ea ethylene ke 0,35, 'me tšebeliso ea unit ea glacial acetic acid ke 0,72. Ho ea ka karolelano ea theko ka Phuptjane 2023, ethylene e etsa chelete e ka bang 37% ea litšenyehelo tsa ethylene based vinyl acetate, athe glacial acetic acid e etsa 45%. Ka hona, bakeng sa tšusumetso ea litšenyehelo, ho feto-fetoha ha theko ea glacial acetic acid ho na le tšusumetso e kholo ka ho fetisisa phetohong ea litšenyehelo tsa ethylene e thehiloeng vinyl acetate, e lateloa ke ethylene. Mabapi le phello ea litšenyehelo tsa mokhoa oa calcium carbide vinyl acetate, litšenyehelo tsa calcium carbide bakeng sa mokhoa oa calcium carbide vinyl acetate li etsa hoo e ka bang 47%, le litšenyehelo tsa glacial acetic acid bakeng sa mokhoa oa calcium carbide vinyl acetate li etsa karolo ea 35%. . Ka hona, ka mokhoa oa calcium carbide oa vinyl acetate, phetoho ea theko ea calcium carbide e na le tšusumetso e kholo ho theko. Sena se fapane haholo le phello ea litšenyehelo tsa mokhoa oa ethylene.

Taba ea bobeli, ho theoha ha thepa ea ethylene le glacial acetic acid ho ne ho le bohlokoa, ho lebisang ho theoheng ho hoholo ha litšenyehelo. Selemong se fetileng, theko ea CFR Northeast Asia ethylene e theohile ka 33%, 'me theko ea glacial acetic acid e theohile ka 32%. Leha ho le joalo, theko ea vinyl acetate e hlahisoang ke mokhoa oa calcium carbide e hatelloa haholo ke theko ea calcium carbide. Selemong se fetileng, theko ea calcium carbide e theohile ka 25%. Ka hona, ho ea ka pono ea mekhoa e 'meli e fapaneng ea tlhahiso, theko ea thepa e tala ea vinyl acetate e hlahisoang ke mokhoa oa ethylene e fokotsehile haholo,' me ho fokotsa litšenyehelo ho feta mokhoa oa calcium carbide.

Le hoja theko ea vinyl acetate e theohile, ho theoha ha eona ha ho bohlokoa joaloka lik'hemik'hale tse ling. Ho ea ka lipalo, selemong se fetileng, theko ea vinyl acetate e theohile ka 59%, e ka 'nang ea bonahala e le ea bohlokoa, empa lik'hemik'hale tse ling li bile le ho fokotseha ho hoholo. Boemo ba hona joale bo fokolang ba 'maraka oa lik'hemik'hale oa Chaena bo thata ho fetoha. Ho lebeletsoe hore nakong e tlang, ho na le monyetla o moholo oa hore phaello ea tlhahiso ea 'maraka oa bareki ba ho qetela, haholo-holo lihlahisoa tse kang polyvinyl joala le EVA, li tla bolokoa ka ho hatella phaello ea vinyl acetate.

Ho na le ho se leka-lekane ho hoholo lekaleng la hajoale la indasteri ea lik'hemik'hale, 'me lihlahisoa tse ngata li maemong a theko e phahameng empa 'maraka oa bareki o monyebe, e leng se bakang moruo o fokolang oa tlhahiso. Leha ho le joalo, leha ho tobane le mathata, 'maraka oa vinyl acetate o bolokile phaello e phahameng, haholoholo ka lebaka la karolo e fapaneng ea litšenyehelo tsa thepa e tala ts'ebetsong ea eona ea tlhahiso le phokotso ea litšenyehelo e bakiloeng ke ho fokotseha ha litheko tsa thepa e tala. Leha ho le joalo, boemo bo fokolang ba 'maraka oa nakong e tlang oa lik'hemik'hale oa Chaena bo thata ho fetoha. Ho lebeletsoe hore nakong e tlang, ho na le monyetla o moholo oa hore phaello ea tlhahiso ea 'maraka oa bareki ba ho qetela, haholo-holo lihlahisoa tse kang polyvinyl joala le EVA, li tla bolokoa ka ho hatella phaello ea vinyl acetate.