ʻAnhydride maleic (MA)

ʻO ka maleic anhydride (MA) kahi hui organik koʻikoʻi i hoʻohana nui ʻia i ka ʻoihana kemika. ʻO kāna mau noi nui e pili ana i ka hana ʻana o nā resins polyester unsaturated (UPR), he mea nui ia i ka hana ʻana i nā plastics i hoʻoikaika ʻia e ka fiberglass, nā uhi, a me nā ʻāpana kaʻa. Eia kekahi, lawelawe ʻo MA ma ke ʻano he precursor no 1,4-butanediol (BDO), i hoʻohana ʻia i nā plastics biodegradable, a me nā mea ʻē aʻe e like me ka fumaric acid a me nā kemika mahiʻai36.

I nā makahiki i hala iho nei, ua ʻike ka mākeke MA i nā loli nui. I ka makahiki 2024, ua emi nā kumukūʻai ma 17.05%, e hoʻomaka ana ma 7,860 RMB/ton a pau i 6,520 RMB/ton ma muli o ka lako nui a me ka nāwaliwali o ke koi mai ka ʻoihana waiwai paʻa, kahi mea kūʻai nui o UPR36. Eia nō naʻe, ua piʻi aʻe ke kumukūʻai no kekahi manawa i ka wā o ka hoʻōki ʻana o ka hana ʻana, e like me ka pani koke ʻana o Wanhua Chemical i Dekemaba 2024, kahi i hoʻokiʻekiʻe pōkole i nā kumukūʻai ma 1,000 RMB/ton3.

I ʻApelila 2025, ke loli mau nei nā kumukūʻai MA, me nā ʻōlelo kūʻai mai 6,100 a 7,200 RMB/ton ma Kina, i hoʻopili ʻia e nā mea e like me nā kumukūʻai mea maka (n-butane) a me nā loli o ke koi ma lalo27. Manaʻo ʻia e noho ka mākeke ma lalo o ke kaomi ma muli o ka hoʻonui ʻana i ka hiki ke hana a me ke koi haʻahaʻa mai nā ʻāpana kuʻuna, ʻoiai ʻo ka ulu ʻana o nā mea kaʻa a me nā mea biodegradable e hāʻawi paha i kekahi kākoʻo.