Nneɛma Titiriw a Ɛhwɛ Bisphenol A a Wɔyɛ So
Wɔ nneɛma a wɔde yɛ nneɛma a ɛho tew ho no, phenol ne acetone, sɛ nneɛma titiriw a wɔde yɛ bisphenol A no, hia sɛ wodi wɔn ahotew so denneennen. Ɛnsɛ sɛ phenol ahotew sua sen 99.5%, na ɛsɛ sɛ acetone ahotew boro 99%. Nneɛma a wɔde yɛ nneɛma a ɛho tew kɛse betumi atew efĩ a ɛde ne ho hyɛ adeyɛ no mu no so na ama wɔahwɛ ahu sɛ adeyɛ no bɛkɔ so yiye.
Sɛnea wɔhwɛ ɔhyew a wɔde yɛ ade no so no ho hia yiye. Condensation reaction temperature no taa yɛ 40 – 60°C ntam. Wɔ saa ɔhyew yi mu no, sɛnea wɔyɛ ade ne sɛnea wɔpaw nneɛma a wɔyɛ no betumi adu nea ɛkari pɛ yiye. Ɔhyew a ɛkɔ soro dodo anaasɛ ɛba fam dodo bɛka bisphenol A BPA aba ne ne su. Dwumadi ne paw a ɛwɔ catalyst no mu na ɛkyerɛ ɔkwan a wɔfa so yɛ ade. Acid catalysts a wɔtaa de di dwuma te sɛ sulphuric acid hwehwɛ sɛ wɔde wɔn dodow ne dodow a wɔde di dwuma no di dwuma pɛpɛɛpɛ. Mpɛn pii no, sulphuric acid dodow sakra wɔ baabi pɔtee bi, na dodow a wɔde ma no yɛ nneɛma a wɔde yɛ adwuma no nyinaa fã pɔtee bi, sɛnea ɛbɛyɛ a wɔbɛhwɛ ahu sɛ ade a ɛma nneɛma yɛ kɛse no yɛ nea eye sen biara. Nhyɛso a ɛma obi yɛ ade nso nya bisphenol A BPA a wɔyɛ no so nkɛntɛnso. Nhyɛsoɔ a ɛfata no yɛ 0.5 – 1.5 MPa. Nhyɛso tebea a ɛyɛ den boa ma adeyɛ nhyehyɛe no gyina pintinn na ɛma mass transfer ne reaction nkɔso nya nkɔso. Nneɛma a wɔde yɛ adwuma no ne sɛnea wɔyɛ no yiye no wɔ abusuabɔ tẽẽ. Wɔtaa hwɛ molar ratio a phenol ne acetone wɔ so wɔ 2.5 – 3.5:1. Sɛ wɔde nsusuwii a ɛfata di dwuma a, ebetumi ama nneɛma a wɔde yɛ no ayɛ adwuma koraa, ama bisphenol A BPA a wonya no akɔ soro, na atew nneɛma a efi mu ba no so.

Bisphenol A BPA nsakraeɛ ma mfiri ahoɔden, scratch ne wear resistance, ayɛ krado sɛ ɛbɛdi nsɛnnennen a ɛyɛ den ho dwuma.

Sɛ wopɛ sɛ wotɔ nnuru a wotumi de ho to so a, yɛsrɛ wo hwehwɛ Shandong Pulisi Chemical Co., Ltd., a ɛde n’adwene si “nnuru a ɛyɛ papa” so na ayɛ adwuma mfe 20 ni.