Swilo swa nkoka swa Vulawuri eka Vuhumelerisi bya Bisphenol A
Hi mayelana na vutengi bya raw material, phenol na acetone, tani hi switirhisiwa leswikulu swa raw material eka vuhumelerisi bya bisphenol A, swilava vulawuri byo tiya eka ku basa ka swona. Ku basa ka phenol aswifanelanga kuva ehansi ka 99.5%, naswona ku basa ka acetone kufanele kufika kutlula 99%. Switirhisiwa swa raw swa vutengi byale henhla swinga hunguta ku kavanyeteka ka thyaka eka reaction xikan’we naku tiyisisa nhluvuko lowu rhetaka wa reaction.
Ku lawuriwa ka mahiselo ya reaction i swa nkoka swinene. Mahiselo ya condensation reaction hi xitalo yava exikarhi ka 40 – 60°C. Endzeni ka mahiselo lawa, mpimo wa reaction xikan’we naku hlawula ka swihumelerisiwa swinga fikelela ku ringanisela lokunene. Mahiselo lawa yanga e henhla swinene kumbe yale hansi swinene yata khumba mbuyelo na khwalithi ya bisphenol A BPA. Ntirho na ku hlawula ka catalyst swi veka tlhelo ra reaction. Ti acidic catalysts leti tirhisiwaka ngopfu tofana na sulfuric acid ti lava ku tirhisiwa loku kongomeke ka nhlayo ya tona na mpimo. Hiku angarhela, nhlayo ya sulfuric acid ya cinca cinca eka ndzhawu yokarhi, naswona mpimo i xiphemu xokarhi xa nhlayo hinkwayo ya switirhisiwa swoka swinga lulamisiwanga, leswaku kuta tiyisisiwa leswaku catalyst yitirhisa matirhelo ya yona ya kahle swinene. Ntshikelelo wa reaction wutlhela wu khumba vuhumelerisi bya bisphenol A BPA. Ntshikelelo lowu faneleke i 0.5 – 1.5 MPa. Ndzhawu ya ntshikelelo lowu tiyeke yi pfuneta ku hlayisa kutshamiseka ka sisiteme ya reaction naswona yi hlohletela ku hundziseriwa ka mass xikan’we na nhluvuko wa reaction. Nhlayo ya swilo yi fambelana hiku kongoma na ku tirha kahle ka reaction. Molar ratio ya phenol kuya eka acetone yitala ku lawuriwa eka 2.5 – 3.5:1. Nhlayo leyi faneleke yinga endla leswaku switirhisiwa leswinga lulamisiwangiki swi endla hiku hetiseka, ku engetela mbuyelo wa bisphenol A BPA, naku hunguta swihumelerisiwa.

Bisphenol Ku cinciwa ka BPA ku ndlandlamuxa matimba ya michini, ku lwisana na ku khwaxa na ku onhaka, ku lulamerile ku langutana na mintlhontlho leyi lavaka.

Loko u lava ku xava switirhisiwa swa tikhemikhali leswi tshembekaka, hi kombela u lava Shandong Pulisi Chemical Co., Ltd., leyi kongomisaka eka “khemikhali ya khwalithi” naswona yi tirhe ku ringana malembe ya 20.