Vinyl acetate (Vac), nke a makwaara dị ka vinyl acetate ma ọ bụ vinyl acetate, bụ mmiri mmiri na-enweghị agba na nke na-enweghị atụ na ọnụ ụlọ okpomọkụ na nrụgide. Dị ka otu n'ime ụwa kasị eji organic organic akụrụngwa, Vac nwere ike imepụta polyvinyl acetate resin (PVAc), polyvinyl mmanya (PVA), polyacrylonitrile (PAN) na ndị ọzọ usoro site na ya polymerization ma ọ bụ copolymerization na ndị ọzọ monomers. A na-eji usoro ndị a eme ihe n'ọtụtụ ebe n'ihe owuwu, akwa akwa, igwe, ọgwụ na ntụ oyi.

Nyocha mkpokọta nke Vinyl Acetate Industry Chain

The upstream nke vinyl acetate ụlọ ọrụ yinye bụ tumadi esịnede nke akụrụngwa dị ka acetylene, acetic acid, ethylene na hydrogen, wdg The isi nkwadebe ụzọ na-ekewa n'ime abụọ ụdị: otu bụ mmanụ ala ethylene usoro, nke na-mere si ethylene. acetic acid na hydrogen, na ngbanwe nke ọnụ ahịa mmanụ na-emetụta ya. Otu bụ nkwadebe nke acetylene site eke gas ma ọ bụ calcium carbide, na mgbe ahụ na acetic acid njikọ nke vinyl acetate, eke gas ubé elu na-eri karịa calcium carbide. N'okpuru ala bụ nkwadebe nke mmanya polyvinyl, latex ọcha (polyvinyl acetate emulsion), VAE, EVA na PAN, wdg, nke mmanya polyvinyl bụ isi ihe achọrọ.

1. Upstream akụrụngwa nke vinyl acetate

Acetic acid bụ isi akụrụngwa nke VAE, yana oriri ya nwere njikọ siri ike na VAE. Data na-egosi na ebe ọ bụ na 2010, China pụtara ìhè oriri nke acetic acid n'ozuzu na-eto eto na-emekarị, nanị na 2015 site na ụlọ ọrụ ọganihu ala na downstream ọchịchọ mgbanwe agbadala, 2020 ruru 7.2 nde tọn, mmụba nke 3.6% tụnyere 2019. Na vinyl acetate nke ala na ngwaahịa ndị ọzọ na-agbanwe ikike nhazi, ọnụego ojiji abawanyela, ụlọ ọrụ acetic acid n'ozuzu ga-aga n'ihu. eto.

N'ihe gbasara ngwa ngwa ala, 25.6% nke acetic acid na-eji PTA (nke terephthalic acid dị ọcha), 19.4% nke acetic acid na-emepụta vinyl acetate, na 18.1% nke acetic acid na-emepụta ethyl acetate. N'ime afọ ndị na-adịbeghị anya, ụkpụrụ ụlọ ọrụ nke ihe nrụpụta acetic acid adịla mma. A na-eji Vinyl acetate mee ihe dị ka otu n'ime akụkụ ngwa ngwa kachasị mkpa nke acetic acid.

2. Ọdịdị ala nke vinyl acetate

A na-ejikarị vinyl acetate na-emepụta mmanya polyvinyl na Eva, wdg Vinyl acetate (Vac), ihe ester dị mfe nke acid saturated acid na mmanya na-abaghị uru, nwere ike polymerized n'onwe ya ma ọ bụ na monomers ndị ọzọ iji mepụta polymers dị ka mmanya polyvinyl (PVA). Ethylene vinyl acetate - ethylene copolymer (EVA), wdg. Enwere ike iji polymers ndị na-esi na ya pụta dị ka nrapado, akwụkwọ ma ọ bụ akwa akwa. ndị ọrụ, agba, inks, nhazi akpụkpọ anụ, emulsifiers, ihe nkiri na-edozi mmiri, na ihe ndị na-eme ka ala dị na kemịkalụ, textile O nwere ọtụtụ ngwa ngwa na kemịkalụ, textile, ụlọ ọrụ ọkụ, ime akwụkwọ, ihe owuwu na ugbo ala. Data na-egosi na 65% nke vinyl acetate na-eji emepụta mmanya polyvinyl na 12% nke vinyl acetate na-emepụta polyvinyl acetate.

Nyocha nke ọnọdụ ugbu a nke vinyl acetate ahịa

1, Vinyl acetate mmepụta ike na mmalite ọnụego

Ihe karịrị 60% nke ikike mmepụta vinyl acetate ụwa gbadoro ụkwụ na mpaghara Eshia, ebe ikike mmepụta vinyl acetate nke China na-akpata ihe dị ka 40% nke ikike mmepụta ụwa niile ma bụrụ obodo kacha emepụta vinyl acetate n'ụwa. E jiri ya tụnyere usoro acetylene, usoro ethylene na-eme ka akụ na ụba dịkwuo mma na gburugburu ebe obibi, na ịdị ọcha ngwaahịa dị elu. Ebe ọ bụ na ike ike nke ụlọ ọrụ kemịkalụ China na-adabere na coal, mmepụta nke vinyl acetate na-adabere na usoro acetylene, na ngwaahịa ndị ahụ dị ntakịrị. Ike mmepụta vinyl acetate nke ụlọ gbasaara nke ọma n'oge 2013-2016, ebe ọ na-agbanweghị agbanwe n'oge 2016-2018. Industrylọ ọrụ vinyl acetate nke China nke afọ 2019 na-eweta ọnọdụ oke arụ ọrụ, yana ikike karịrị ya na nkeji usoro calcium carbide acetylene yana itinye uche ụlọ ọrụ dị elu. 2020, China si vinyl acetate mmepụta ikike nke 2.65 nde tọn / afọ, ewepụghị afọ-na-afọ.

2, Vinyl acetate oriri

N'ihe gbasara oriri, vinyl acetate nke China n'ozuzu ya na-egosi mgbanwe na-agbanwe agbanwe, na ahịa maka vinyl acetate na China na-agbasawanyewanye n'ihi mmụba nke ọchịchọ nke EVA ala, wdg Data na-egosi na, ma e wezụga maka 2018. , Oriri vinyl acetate nke China site na ihe ndị dị ka ịrị elu nke ọnụ ahịa acetic acid, oriri agbadala, ebe ọ bụ na 2013 China vinyl Ọchịchọ ahịa acetate ebiliwo ngwa ngwa, oriri ebiliwo kwa afọ, ka nke 2020 dị ala eruola tọn nde 1.95, mmụba nke 4.8% ma e jiri ya tụnyere 2019.

3, The nkezi price nke vinyl acetate ahịa

Site n'echiche nke ọnụ ahịa ahịa vinyl acetate, nke ike karịrị ike metụtara, ọnụ ahịa ụlọ ọrụ kwụsiri ike na 2009-2020. 2014 site na mkpirisi ọkọnọ nke mba ofesi, ọnụ ahịa ngwaahịa ụlọ ọrụ abawanyela nke ukwuu, ụlọ ọrụ ụlọ na-agbasawanye mmepụta ihe, na-ebute oke oke ike. Ọnụ ahịa acetate vinyl dara nke ukwuu na 2015 na 2016, na 2017, metụtara amụma nchekwa gburugburu ebe obibi, ọnụ ahịa ngwaahịa ụlọ ọrụ bilitere nke ukwuu. 2019, n'ihi ọkọnọ zuru oke n'ahịa acetic acid dị elu yana ngwa ngwa na-achọsi ike na ụlọ ọrụ ihe owuwu ala, ọnụ ahịa ngwaahịa ụlọ ọrụ dara nke ọma, na 2020, ọrịa ahụ metụtara, nkezi ọnụahịa ngwaahịa dara, yana dị ka nke July 2021. Ọnụ ahịa dị n'ahịa ọwụwa anyanwụ ruru ihe karịrị 12,000 Ọnụ ego ịrị elu dị ukwuu, nke bụ isi n'ihi mmetụta nke akụkọ ọma nke ọnụ ahịa mmanụ dị n'elu na n'ozuzu ya. obere ahịa ahịa kpatara ụfọdụ nkwụsị ụlọ mmepụta ihe ma ọ bụ igbu oge.

Nchịkọta nke ụlọ ọrụ Ethyl Acetate

Ụlọ ọrụ Ethyl acetate China nke akụkụ anọ nke Sinopec nwere ikike nke 1.22 nde tọn / afọ, na-aza 43% nke mba ahụ, na Anhui Wanwei Group nwere 750,000 tọn / afọ, na-aza 26.5%. Akụkụ nke mba ofesi etinyere ego Nanjing Celanese 350,000 tọn / afọ, na-aza 12%, yana akụkụ nkeonwe Inner Mongolia Shuangxin na Ningxia Dadi ngụkọta 560,000 tọn / afọ, na-aza 20%. Ndị na-emepụta vinyl acetate ugbu a dị na Northwest, East China na Southwest, yana ikike Northwest na-aza 51.6%, East China na-aza 20.8%, North China na-aza 6.4% na Southwest na-aza 21.2%.

Nyocha nke vinyl acetate anya

1, EVA downstream ina uto

Enwere ike iji EVA downstream nke vinyl acetate dị ka ihe nkiri mkpuchi cell PV. Dị ka ụwa ọhụrụ ike netwọk, EVA si ethylene na vinyl acetate (VA) abụọ monomers site copolymerization mmeghachi omume, ọnụ ọgụgụ dị nta nke VA na 5%-40%, n'ihi na ya ọma arụmọrụ, ngwaahịa na-ọtụtụ-eji na ụfụfụ, arụ ọrụ. ihe nkiri wụsara, ihe nkiri nkwakọ ngwaahịa, ngwaahịa na-agba ntụtụ, ihe na-agwakọta ihe na adhesives, waya na cable, fotovoltaic cell encapsulation film na ọkụ gbazee adhesives, wdg 2020 maka enyemaka fotovoltaic n'afọ gara aga, ọtụtụ ndị na-emepụta modul ụlọ ụlọ ekwuputala mgbasawanye nke mmepụta, yana site na nhazi nke fotovoltaic modul size, ọnụọgụ abụọ nke iko modul modul abanye n'ime ọnụ ọgụgụ abawanyela nke ukwuu, ọchịchọ maka fotovoltaic modul gafere. uto a na-atụ anya ya, na-akpali uto nke EVA chọrọ. A na-atụ anya na a ga-etinye tọn 800,000 nke ikike EVA na mmepụta na 2021. Dị ka atụmatụ si kwuo, uto nke 800,000 tọn nke ikike mmepụta EVA ga-eme ka ọganihu kwa afọ nke 144,000 tọn vinyl acetate chọrọ, nke ga-eme ka ọganihu kwa afọ. nke 103,700 ton nke acetic acid chọrọ.

2, Vinyl acetate overcapacity, elu-ọgwụgwụ ngwaahịa ka mkpa ka a ga-ibubata

China nwere oke ike nke vinyl acetate, na ngwaahịa ndị dị elu ka kwesịrị ibubata. Ka ọ dị ugbu a, ọkọnọ nke vinyl acetate na China karịrị ihe a chọrọ, yana oke oke na mmepụta oke na-adabere na oriri mbupụ. Kemgbe mgbasawanye nke vinyl acetate mmepụta ike na 2014, mbupụ vinyl acetate nke China abawanyela nke ukwuu, na ụfọdụ ngwaahịa ndị a na-ebubata ejirila ikike mmepụta ụlọ dochie anya. Tụkwasị na nke ahụ, ihe ndị China na-ebupụ na-abụkarị ngwaahịa dị ala, ebe mbubata na-abụkarị ngwaahịa dị elu. Ka ọ dị ugbu a, China ka kwesịrị ịdabere na mbubata maka ngwaahịa vinyl acetate dị elu, ụlọ ọrụ vinyl acetate ka nwere ohere maka mmepe na ahịa ngwaahịa dị elu.