Vinyl acetate (VAc), inozivikanwawo sevinyl acetate kana vinyl acetate, imvura isina ruvara uye yakajeka pamhepo tembiricha uye kumanikidza. Seimwe yeanonyanya kushandiswa mumaindasitiri organic raw materials, VAc inogona kugadzira polyvinyl acetate resin (PVAc), polyvinyl doro (PVA), polyacrylonitrile (PAN) uye zvimwe zvinobva kuburikidza neyayo polymerization kana copolymerization nemamwe mamonmers. Izvi zvinobva zvashandiswa zvakanyanya mukuvaka, machira, muchina, mishonga uye zvigadziriso zvevhu.

Yakazara Ongororo yeVinyl Acetate Indasitiri Chain

Kumusoro kweiyo vinyl acetate industry chain inonyanya kuumbwa nezvinhu zvakasvibirira zvakadai seacetylene, acetic acid, ethylene uye hydrogen, nezvimwewo Nzira huru dzekugadzirira dzakakamurwa kuva marudzi maviri: imwe ndiyo petroleum ethylene nzira, iyo inogadzirwa kubva kuethylene. acetic acid nehydrogen, uye inokanganiswa nekushanduka kwemitengo yemafuta asina kuchena. Imwe ndeyekugadzirira kweacetylene negasi rechisikigo kana calcium carbide, uyezve uye acetic acid synthesis yevinyl acetate, gasi rechisikigo rakakwira zvishoma kudarika calcium carbide. Kudzika kunonyanya kugadzirwa kwepolyvinyl doro, chena latex (polyvinyl acetate emulsion), VAE, EVA uye PAN, nezvimwewo, iyo polyvinyl doro ndiyo inonyanya kudiwa.

1, Kumusoro kwezvinhu zvakagadzirwa zvevinyl acetate

Acetic acid ndiyo kiyi mbishi zvinhu kumusoro kweVAE, uye kushandiswa kwayo kune hukama hwakasimba neVAE. Dhata dzinoratidza kuti kubvira 2010, kushandiswa kweChina kweacetic acid yese kuri kukura, muna 2015 chete neindasitiri yakawedzera kudzika uye pasi pemvura shanduko yakaderera, 2020 yakasvika 7.2 miriyoni matani, kuwedzera kwe3.6% zvichienzaniswa ne2019. iyo yakadzika vinyl acetate uye zvimwe zvigadzirwa simba chimiro shanduko, chiyero chekushandisa chakawedzera, iyo acetic acid indasitiri yese icharamba ichienderera. kukura.

Maererano nekushandiswa kwepasi, 25.6% yeacetic acid inoshandiswa kugadzira PTA (purified terephthalic acid), 19.4% yeacetic acid inoshandiswa kugadzira vinyl acetate, uye 18.1% yeacetic acid inoshandiswa kubudisa ethyl acetate. Mumakore achangopfuura, maitiro eindasitiri yeacetic acid derivatives anga akanyanya kugadzikana. Vinyl acetate inoshandiswa seimwe yeakanyanya kukosha kuzasi kwekushandisa zvikamu zveacetic acid.

2. Kudzika kwemaitiro evinyl acetate

Vinyl acetate inonyanya kushandiswa kugadzira polyvinyl doro uye EVA, etc. Vinyl acetate (Vac), iri nyore ester yeasidhi yakazara uye unsaturated doro, inogona polymerized pachayo kana nemamwe monomers kugadzira mapolima akadai polyvinyl doro (PVA), ethylene vinyl acetate - ethylene copolymer (EVA), etc. Mapolymers anoguma anogona kushandiswa seanonamatira, mapepa kana machira. sizing agents, pendi, ingi, kugadzirwa kwematehwe, emulsifiers, mafirimu anonyungudika nemvura, uye magadzirirwo evhu mumakemikari, machira Iine huwandu hwakawanda hwekushandisa mumakemikari, machira, mwenje indasitiri, kugadzira mapepa, kuvaka uye minda yemotokari. Data inoratidza kuti 65% yevinyl acetate inoshandiswa kugadzira polyvinyl doro uye 12% yevinyl acetate inoshandiswa kugadzira polyvinyl acetate.

Ongororo yemamiriro azvino evinyl acetate musika

1, Vinyl acetate kugadzirwa kwehuwandu uye yekutanga-up mwero

Anopfuura makumi matanhatu muzana epasi rose ekugadzirwa kwevinyl acetate yakatarisana mudunhu reAsia, nepo China yevinyl acetate yekugadzira inoverengera inosvika makumi mana muzana epasi rose rekugadzira kugona uye ndiyo yakakura pasi rose vinyl acetate inogadzira nyika. Kuenzaniswa neacetylene nzira, iyo ethylene nzira inowedzera hupfumi uye inoshamwaridzana, ine yakakwirira chigadzirwa kuchena. Sezvo simba resimba reindasitiri yemakemikari yeChina rinonyanya kuvimba nemarasha, kugadzirwa kwevinyl acetate kunonyanya kuenderana neacetylene nzira, uye zvigadzirwa zvakaderera-kupera. Domestic vinyl acetate yekugadzira simba yakawedzera zvakanyanya mukati me2013-2016, ichiri isina kuchinjwa panguva ya2016-2018. 2019 China's vinyl acetate indasitiri inopa yakarongeka yakawandisa mamiriro, ine yakawandisa huwandu mu calcium carbide acetylene process units uye yakakwira indasitiri. 2020, China's vinyl acetate yekugadzira inokwana 2.65 miriyoni matani / gore, yakadzika gore-pa-gore.

2, Vinyl acetate kushandiswa

Nezvekudyiwa kuri kuita, China's vinyl acetate yakazara inoratidza kushanduka kukwira kumusoro, uye musika wevinyl acetate muChina wave uchiwedzera zvishoma nezvishoma nekuda kwekukura kwekudiwa kweiyo downstream EVA, etc. Data inoratidza kuti, kunze kwe2018 , China's vinyl acetate kushandiswa nezvinhu zvakadai sekukwira kweacetic acid mitengo, kushandiswa kwakadzikira, kubvira 2013 China's vinyl acetate musika. kudiwa kwakakwira nekukurumidza, kushandiswa kwakakwira gore negore, se2020 yakaderera yasvika 1.95 miriyoni matani, kuwedzera kwe4.8% zvichienzaniswa ne2019.

3, Avhareji mutengo wevinyl acetate musika

Kubva pamaonero emitengo yevinyl acetate yemusika, yakakanganiswa nehuwandu hwehuwandu, mitengo yemaindasitiri yakaramba yakagadzikana muna 2009-2020. 2014 nekunze kwekupa chibvumirano, mitengo yezvigadzirwa zveindasitiri yakawedzera zvakanyanya, mabhizinesi epamba anoshingairira kuwedzera kugadzirwa, zvichikonzera kuwandisa kwakanyanya. Mitengo yeVinyl acetate yakadonha zvakanyanya mu2015 uye 2016, uye muna 2017, yakakanganiswa nemitemo yekudzivirira kwezvakatipoteredza, mitengo yezvigadzirwa zveindasitiri yakakwira zvakanyanya. 2019, nekuda kwekuwanikwa kwakakwana mumusika weacetic acid uye kudzikira kudiwa muindasitiri yekuvaka yepasi, mitengo yezvigadzirwa zveindasitiri yakadonha zvakanyanya, uye muna 2020, yakakanganiswa nedenda, mutengo wepakati wezvigadzirwa wakawedzera, uye kubva muna Chikunguru 2021, mitengo mumusika wekumabvazuva yakasvika kupfuura zviuru gumi nezviviri. musika wakaderera unowanikwa nekuda kwekuvharwa kwefekitori kana kunonoka.

Mhedziso yeEthyl Acetate Makambani

Ethyl acetate Chinese mabhizinesi echikamu cheSinopec zvidyarwa zvina zvine huwandu hwematani miriyoni 1.22 / gore, inoverengera 43% yenyika, uye Anhui Wanwei Group ine 750,000 matani / gore, inoverengera 26.5%. Chikamu chakaiswa kunze kwenyika Nanjing Celanese 350,000 matani / gore, inoverengera 12%, uye yakavanzika chikamu Inner Mongolia Shuangxin uye Ningxia Dadi inokwana 560,000 matani / gore, inoverengera makumi maviri muzana. Vagadziri vemazuva ano vevinyl acetate vanonyanya kuwanikwa kuNorthwest, East China neSouthwest, neNorthwest capacity accounting ye51.6%, East China inotora 20.8%, North China inotora 6.4% uye Maodzanyemba anotora 21.2%.

Kuongororwa kwevinyl acetate maonero

1, Eva pasi pemvura inoda kukura

EVA kuzasi kwevinyl acetate inogona kushandiswa sePV cell encapsulation firimu. Zvinoenderana neglobal new energy network, EVA kubva ethylene uye vinyl acetate (VA) maviri monomers ne copolymerization reaction, iyo yakawanda chikamu cheVA mu5% -40%, nekuda kwekuita kwayo kwakanaka, chigadzirwa chinoshandiswa zvakanyanya mufuro, inoshanda. yakadururwa firimu, firimu rekurongedza, zvigadzirwa zvinofuridza majekiseni, majekiseni anosanganisa uye zvinonamira, waya uye tambo, photovoltaic cell encapsulation firimu uye inopisa kunyunguduka. adhesives, etc. 2020 ye photovoltaic subsidies mugore rapera, vazhinji vedzimba musoro module vagadziri vakazivisa kuwedzera kwekugadzirwa, uye nekusiyana-siyana kwe photovoltaic module size, kaviri-sided double-glass module penetration rate yakawedzera zvakanyanya, kudiwa kwe photovoltaic. modules kupfuura kukura kunotarisirwa, inomutsa EVA inoda kukura. Zvinotarisirwa kuti 800,000 tons of EVA capacity ichaiswa mukugadzirwa muna 2021. Maererano nefungidziro, kukura kwe800,000 matani eEVA kugadzirwa kwesimba kunofambisa kukura kwegore kwe144,000 matani evinyl acetate inoda, iyo inofambisa kukura kwegore negore. ye103,700 matani eacetic acid inoda.

2, Vinyl acetate overcapacity, zvigadzirwa zvepamusoro-soro zvichiri kuda kutengwa kunze kwenyika

China ine huwandu hwakawandisa hwevinyl acetate, uye zvigadzirwa zvepamusoro-soro zvichiri kuda kutengwa kunze kwenyika. Parizvino, kupihwa kwevinyl acetate muChina kunodarika kudiwa, nekuwanda kwehuwandu uye kuwanda kwekugadzirwa kunoenderana nekutengesa kunze kwenyika. Kubva pakuwedzera kweiyo vinyl acetate yekugadzira kugona muna 2014, China vinyl acetate inotengeswa kunze kwenyika yakawedzera zvakanyanya, uye zvimwe zvigadzirwa zvinotengeswa kunze kwenyika zvakatsiviwa nehunyanzvi hwekugadzira mudzimba. Pamusoro pezvo, zvinhu zvinotengeswa kunze kwenyika neChina zvinonyanya kuderera, nepo zvinotengeswa kunze kwenyika zviri zvemhando yepamusoro. Parizvino, China ichiri kufanira kuvimba nekutengesa kunze kwezvigadzirwa zvepamusoro zvevinyl acetate, uye iyo vinyl acetate indasitiri ichine nzvimbo yekusimudzira mumusika wezvigadzirwa zvepamusoro.