Phenolhe mea tino nui te matū matū matū, e whakamahia whānuitia ana i roto i te hanga o nga momo matū, penei i te plasticizers, antioxidants, curing agents, me etahi atu.I roto i tenei tuhinga, ka whakaatu maatau i te hangarau hanga o te phenol.

 Nga whakamahinga o te phenol

 

Ko te whakaritenga o te phenol ka mahia ma te tauhohe i te benzene me te propylene i te aroaro o nga whakakōkī.Ka taea te wehewehe i te tukanga tauhohenga kia toru nga waahanga: ko te taahiraa tuatahi ko te tauhohenga o te benzene me te propylene ki te hanga cumene;ko te mahi tuarua ko te whakapouri o te kumene ki te hanga cumene hydroperoxide;Ko te taahiraa tuatoru ko te wehenga o te cumene hydroperoxide ki te hanga phenol me te acetone.

 

I te taahiraa tuatahi, ka tauhohe te benzene me te propylene i te aroaro o te whakakorikori waikawa hei hanga kumene.Ka mahia tenei tauhohenga i te mahana o te 80 ki te 100 nga nekehanga Celsius me te pehanga tata ki te 10 ki te 30 kg/cm2.Ko te whakakōkī i te nuinga o te wā konumohe pūhaumāota waikawa pungatara ranei.Ko te hua tauhohenga he cumene, ka wehea mai i te ranunga tauhohenga ma te whakamaarama.

 

I te taahiraa tuarua, ka waikurahia te kumene ki te hau i te aroaro o te whakakorikori waikawa hei hanga cumene hydroperoxide.Ka mahia tenei tauhohenga i te mahana o te 70 ki te 90 nga nekehanga Celsius me te pehanga tata ki te 1 ki te 2 kg/cm2.Ko te whakakorikori e whakamahia ana ko te waikawa pungatara, te waikawa phosphoric ranei.Ko te hua tauhohenga ko te cumene hydroperoxide, ka wehea mai i te ranunga tauhohenga ma te whakakore.

 

I te taahiraa tuatoru, ka wehea te cumene hydroperoxide i te aroaro o te whakakorikori waikawa hei hanga phenol me te acetone.Ka mahia tenei tauhohenga i te mahana o te 100 ki te 130 nga nekehanga Celsius me te pehanga tata ki te 1 ki te 2 kg/cm2.Ko te whakakorikori e whakamahia ana ko te waikawa pungatara, te waikawa phosphoric ranei.Ko te hua tauhohenga he ranunga o te phenol me te acetone, ka wehea mai i te ranunga tauhohenga ma te whakakore.

 

Ka mutu, ko te wehenga me te purenga o te phenol me te acetone ka mahia ma te whakamaarama.Ki te whiwhi hua tino parakore, ka whakamahia te raupapa o nga pou whakamarumaru mo te wehenga me te purea.Ko te hua whakamutunga ko te phenol, ka taea te whakamahi mo te hanga momo momo matū.

 

Hei whakarāpopototanga, ko te whakarite o te phenol mai i te benzene me te propylene na roto i nga hikoinga e toru i runga ake nei ka taea te whiwhi phenol tino parakore.Heoi, me whakamahi tenei tukanga i te maha o nga whakakorikori waikawa, ka nui te pirau o nga taputapu me te parahanga taiao.No reira, ka hangaia etahi tikanga whakarite hou hei whakakapi i tenei mahi.Hei tauira, ko te tikanga whakarite o te phenol ma te whakamahi i te biocatalysts kua ata whakamahia ki te umanga.


Wā tuku: Tihema-11-2023