Ua ʻike ʻia ka emi ʻana o nā kumukūʻai o nā huahana kemika ma ka mākeke, e alakaʻi ana i kahi kaulike ʻole o ka nui o nā loulou o ke kaulahao ʻoihana kemika. Ua hoʻonui ke kumukūʻai aila kiʻekiʻe i ke kumu kūʻai ma ke kaulahao ʻoihana kemika, a ʻilihune ka hoʻokele waiwai o nā huahana kemika. Eia nō naʻe, ua ʻike pū ke kumukūʻai kūʻai o vinyl acetate i ka emi mau ʻana, akā ua mau ka waiwai o ka hana a maikaʻi ka hoʻokele waiwai. No laila, no ke aha e hiki ai kevinyl acetateMākeke e mālama i kahi kiʻekiʻe o ka pōmaikaʻi?

Ma ka waena a hiki i ka hopena o Iune 2023, ʻo ke kumukūʻai mākeke o vinyl acetate he 6400 yuan / ton. E like me ke kumu kūʻai o nā kumu waiwai no ke ʻano ethylene a me ke ʻano calcium carbide, ʻo ka palena waiwai o ka ethylene method vinyl acetate ma kahi o 14%, aʻo ka palena waiwai o ka calcium carbide method vinyl acetate i loko o kahi kūlana pohō. ʻOiai ka emi mau ʻana o ke kumukūʻai o ka vinyl acetate no hoʻokahi makahiki, ʻoi aku ka kiʻekiʻe o ka palena waiwai o ka ethylene based vinyl acetate, a hiki i ka 47% i kekahi mau hihia, e lilo ana i mea waiwai kiʻekiʻe loa ma waena o nā kemika nui. I ka hoʻokaʻawale ʻana, ʻo ke ʻano calcium carbide o vinyl acetate i loko o kahi kūlana pohō no ka hapa nui o nā makahiki ʻelua i hala.

Ma ke kālailai ʻana i nā hoʻololi ʻana i nā palena waiwai o ka vinyl acetate ethylene based a me ka calcium carbide based vinyl acetate, ua ʻike ʻia ʻo ka ethylene based vinyl acetate ka waiwai mau i nā makahiki i hala iho nei, me ka palena kiʻekiʻe loa i hiki i 50% a i luna a me ka awelika. ka pae o ka loaʻa kālā ma kahi o 15%. Hōʻike kēia i ka vinyl acetate i hoʻokumu ʻia i ka ethylene i nā makahiki ʻelua i hala iho nei, me ka pōmaikaʻi holoʻokoʻa maikaʻi a me nā palena waiwai paʻa. I nā makahiki ʻelua i hala iho nei, koe wale nō ka loaʻa kālā nui mai Malaki 2022 a Iulai 2022, ʻo ke ʻano calcium carbide o vinyl acetate i loko o kahi kūlana pohō no nā manawa ʻē aʻe. I ka mahina o Iune 2023, ʻo ka nui o ka loaʻa kālā o ka calcium carbide method vinyl acetate ma kahi o 20% nalowale, a ʻo ka awelika o ka loaʻa kālā o ka calcium carbide method vinyl acetate i nā makahiki ʻelua i hala he 0.2%. Mai kēia, hiki ke ʻike ʻia he ʻilihune ka pōmaikaʻi o ke ʻano calcium carbide no ka vinyl acetate, a ke hōʻike nei ke kūlana holoʻokoʻa i kahi poho.

Ma o ka nānā hou ʻana, ʻo nā kumu nui o ka loaʻa kālā kiʻekiʻe o ka ethylene based vinyl acetate production e like me kēia: ʻo ka mea mua, ʻokoʻa ka māhele o nā kumukūʻai maka i nā kaʻina hana like ʻole. Ma ke ʻano ethylene o ka vinyl acetate, ʻo ka hoʻohana ʻana o ka ethylene he 0.35, a ʻo ka hoʻohana ʻana o ka waikawa acetic glacial he 0.72. Wahi a ka pae kumu kūʻai ma Iune 2023, ʻo ka ethylene e pili ana ma kahi o 37% o ke kumukūʻai o ka vinyl acetate ethylene, aʻo ka glacial acetic acid he 45%. No laila, no ka hopena o ke kumukūʻai, ʻo ke kumukūʻai o ka glacial acetic acid ka hopena nui loa i ka hoʻololi kumukūʻai o ka ethylene based vinyl acetate, a ukali ʻia e ka ethylene. Ma ke ʻano o ka hopena i ke kumukūʻai o ka calcium carbide method vinyl acetate, ʻo ke kumu kūʻai o ka calcium carbide no ka calcium carbide method vinyl acetate e pili ana i 47%, a ʻo ke kumu kūʻai o ka glacial acetic acid no ka calcium carbide method vinyl acetate account no kahi 35% . No laila, ma ke ʻano calcium carbide o vinyl acetate, ʻoi aku ka hopena o ke kumukūʻai o ka calcium carbide i ke kumukūʻai. ʻOkoʻa loa kēia mai ka hopena o ke kumukūʻai o ke ʻano ethylene.

ʻO ka lua, ʻo ka emi ʻana o nā mea waiwai ethylene a me ka glacial acetic acid he mea nui, e alakaʻi ana i ka emi nui o nā kumukūʻai. I ka makahiki i hala iho nei, ua emi ke kumukūʻai o CFR Northeast Asia ethylene e 33%, a ua emi ke kumukūʻai o ka glacial acetic acid e 32%. Eia nō naʻe, ʻo ke kumu kūʻai o ka vinyl acetate i hana ʻia e ka calcium carbide method i kaohi nui ʻia e ke kumu kūʻai o ka calcium carbide. I ka makahiki i hala iho nei, ua hāʻule ke kumukūʻai o ka calcium carbide ma kahi kumulative 25%. No laila, mai ka hiʻohiʻona o nā kaʻina hana like ʻole ʻelua, ua emi nui ke kumukūʻai kumu o ka vinyl acetate i hana ʻia e ka ethylene method, a ʻoi aku ka nui o ka hoʻemi ʻana ma mua o ke ʻano o ka calcium carbide method.

ʻOiai ua emi ke kumukūʻai o ka vinyl acetate, ʻaʻole i like kona emi ʻana e like me nā mea kemika ʻē aʻe. Wahi a ka helu ʻana, i ka makahiki i hala aku nei, ua hāʻule ke kumukūʻai o ka vinyl acetate e 59%, he mea nui paha ia, akā ua ʻike nā mea kemika ʻē aʻe i nā emi nui. ʻO ke kūlana nāwaliwali o ka mākeke kemika Kina he paʻakikī ke hoʻololi maoli. Manaʻo ʻia i ka wā e hiki mai ana, e mālama ʻia ka loaʻa kālā o ka mākeke mea kūʻai aku, ʻoi aku ka nui o nā huahana e like me ka polyvinyl alcohol a me ka EVA, ma o ka hoʻopaʻa ʻana i nā waiwai o ka vinyl acetate.

Aia kekahi ʻano koʻikoʻi koʻikoʻi i ke kaulahao ʻoihana kemika o kēia manawa, a he nui nā huahana i ke ʻano o ke kumu kūʻai kiʻekiʻe akā lohi nā mea kūʻai aku, e hopena i ka hoʻokele waiwai. Eia nō naʻe, ʻoiai ke kū nei i nā pilikia, ua mālama ka mākeke vinyl acetate i kahi kiʻekiʻe o ka loaʻa kālā, ma muli o ke ʻano like ʻole o nā kumukūʻai maka i loko o kāna kaʻina hana a me ka hōʻemi ʻana i ke kumu kūʻai ma muli o ka emi ʻana o nā kumukūʻai maka. Eia nō naʻe, paʻakikī ke hoʻololi maoli ʻia ke kūlana nāwaliwali o ka mākeke kemika Kina e hiki mai ana. Manaʻo ʻia i ka wā e hiki mai ana, e mālama ʻia ka loaʻa kālā o ka mākeke mea kūʻai aku, ʻoi aku ka nui o nā huahana e like me ka polyvinyl alcohol a me ka EVA, ma o ka hoʻopaʻa ʻana i nā waiwai o ka vinyl acetate.