Iphepha lokuhlathulula umkhiqizo we-Bisphenol A/BPA I-Bisphenol A (BPA)
Ukuhlolisisa komkhiqizo
Ukuhlolisisa komkhiqizo
Ibizo lomkhiqizo: Bisphenol A (Isifinyezo: BPA)
Ifomula yamakhemikhali: C₁₅H₁₆O₂
Inomboro ye-CAS: 80-05-7�
Inomboro ye-EINECS: 201-245-8
Isigaba somkhiqizo: Amakhemikhali we-oleo; Amakhompawundi we-Organic Synthetic
Ukubukeka: Amakristalu amhlophe afana nenalithi nofana ipuyere emhlophe encani (izinga lamabubulo lingabonakala njengezinto eziqinileko)
Iimpawu eziphathekako nezamakhemikhali
| Ipahla | Ukucaciswa |
|---|---|
| Ubunzima bamamolekhyuli | 228.29 g/mol |
| Indawo yokuncibilika | 158–159 °C (316–318 °F) |
| Indawo yokubila | 220 °C (428 °F) ku-4 mmHg (isimo se-vacuum) |
| Ukuminyana | 1.195 g/cm3 (25 °C) |
| Ukuncibilika | Ayincibiliki emanzini; encibilika eentweni eziphilako (isib., i-ethanol, i-acetone, i-benzene, i-toluene, kanye ne-ethyl acetate) |
| Iphuzu lokukhanya | 227 °C (indebe evaliweko) |
| Ukuzinza | Zizinzile ngaphasi kwezinga lokutjhisa elijayelekileko kanye nomfutho; ukuzwela ukukhanya kwe-ultraviolet (UV) (kungawohloka nofana kutjhuguluke umbala ngokuvezwa kwesikhathi eside kwe-UV); balekela ukuthintana nama-oksidiza aqinileko, ama-esidi, nama-alkali |
Iinsetjenziswa eziqakathekileko
I-Bisphenol A yinto eqakathekileko ephakathi ekukhiqizeni ama-polymer asebenza kuhle khulu kanye nezinto zebubulo, ezinemikhakha yokusetjenziswa elandelako:
Ukukhiqizwa kwePlastiki ye-Polycarbonate (PC)
Njengesisetjenziswa esiyinhloko seplastiki ye-PC, i-BPA yenza bona kwenziwe imikhiqizo engaphukiko, engatjhiswako njengezindlu zedivayisi ye-elekthronikhi (ama-laptop, ama-smartphone), iingcenye zeenkoloyi (izimbozo zamalambu, amaphaneli wangaphakathi), kanye nemijekana yokudla (elawulwa ngokuphepha eendaweni ezinengi).
Ukwenziwa kwe-Epoxy Resin
Isetjenziselwa ukukhiqiza ama-epoxy resins wokugqoka (isib., ama-linings wangaphakathi, ama-coatings wokulwisana nokugqwala webubulo), ama-adhesive (ama-adhesive wesakhiwo esinamandla amakhulu we-aerospace nokwakha), kanye nezinto zokuvikela igezi (amabhodi wesekethe, ama-transformer windings).
Ezinye iinsetjenziswa zebubulo
Into engakasetjenzwa yama-polyether polyols (esetjenziswa kumagwebu we-polyurethane).
Isingezelelo emapulasitiki, ama-flame retardants, kanye nama-UV stabilizer wezinto ze-polymer.
Okuphakathi ekubunjweni kwamakhemikhali akhethekileko (isib., ama-antioxidants, amadayi).
Amazinga wekhwalithi
Imikhiqizo yethu ye-Bisphenol A ikhambisana namazinga wezamabubulo wephasi loke nokuphepha, ngeenkomba ezijayelekileko zokulawula ukuhlanzeka nokungcola ngokulandelako:
| Inkomba | Igreyidi yamabubulo (ejwayelekileko) | Igreyidi ye-Reagent (Ukuhlanzeka Okuphezulu) |
|---|---|---|
| Ukuhlanzeka (HPLC) | ≥ 99.5% | ≥ 99.8% |
| Okuqukethwe komswakama | ≤ 0.1% | ≤ 0.05% |
| Okuqukethwe mlotha | ≤ 0.01% | ≤ 0.005% |
| Ukungcola kwe-Heavy Metal (Pb, Cd, Hg) | ≤ 10 ppm | ≤ 1 ppm |
| I-Phenol Residue | ≤ 0.2% | ≤ 0.05% |
Iinqophiso ezenziwe ngokwezifiso ziyatholakala malungana neendingo ezithileko zebubulo (isib., amazinga aphasi wokungcola wokukhiqiza izinto ezithintana nokudla).
Imihlahlandlela yokubulunga nokuphathwa
Ukuqinisekisa ukuzinza komkhiqizo nokuphepha kokusebenza, landela iimfuneko zokugcina nokuphatha:
Ubujamo bokubulunga
Izinga lokutjhisa: Gcina endaweni epholileko, eyomileko ku-15-25 °C; balekela ukutjhisa okukhulu (>30 °C) nofana ukutjhisa (
Ukukhanya: Sebenzisa iinsetjenziswa ezingabonakaliko (isib., amabhodlela weklasi ansundu, imigubhu yeplastiki ye-HDPE enevikeleko le-UV) ukukhandela ukuwohloka okubangelwa yi-UV.
Umswakama: Gcina umswakama ophasi kwama-60%; faka ama-desiccants (i-silica gel, i-anhydrous calcium chloride) eentjeni ukugwema ukukheka.
Iimfuneko zokuvala
Gcina iintjalo zivalwe kuhle ngemva kokuzisebenzisa ukukhandela ukumuncwa komswakama nokusilaphazeka. Balekela ukusebenzisa iindlela zokuvala zesikhatjhana (isib., ukugoqa kweplastiki) okungabanga ukusilaphazeka okudlulako.
Iinqabo zokuphepha
Yembatha izinto zokuzivikela (i-PPE): Imaski yothuli, amagilavu angahlaselwa makhemikhali, kanye namagogolosi wokuphepha lokha nawuphatha (khulukhulu amafomu wepuyere/ama-granular).
Ukungena komoya: Qinisekisa ukugeleza okuhle komoya eendaweni zokugcina nezokuphatha ukugwema ukubuthelela ithuli nofana umhwamuko.
Ukuphathwa kokuchitheka: Hlanza ukuchitheka ngezinto ezimunyako (umhlaba we-diatomaceous, ikhabhoni esebenzako); lahla iimfesi ngokuya kwemithetho yamakhemikhali ayingozi yendawo.
Ukuthobela imithetho
Imikhawulo yePhasi loke: Ikhambisana nomThetho we-EU REACH (I-Annex XVII) imikhawulo ye-BPA eentweni ezithintana nokudla (isib., evinjelwe emabhodleleni wokupha abantwana).
I-US FDA: Ihlangabezana nemihlahlandlela ye-FDA yokusetjenziswa kwe-BPA eentweni ezithintana nokudla kanye namapulasitiki (21 CFR 175.300).
Amazinga we-China: Ahambisana ne-GB 4806.6 (amazinga wokuphepha wama-resin weplastiki athintana nokudla).
Ukuphakheja nokuphila kwetjhelfu
Iindlela zokupakisha:
Igreyidi yamabubulo: amasaka weplastiki we-HDPE angama-25 kg (anamalayini wangaphakathi we-polyethylene) nofana amadrum wefayibha angama-500 kg (afakwe ifoyili ye-aluminiyamu).
Igreyidi ye-Reagent: 1 kg yamabhodlela wengilazi e-amber (avalwe ngeenqhema ezifakwe i-Teflon).
Isikhathi sokuphila: iinyanga ezima-24 ukusuka ngelanga lokukhiqiza (lokha nayibekwa ngokuya kwemibandela engehla, ingakavulwa).
Ifomu lokuhlola ikhwalithi ye-Bisphenol A
| I-Analyte | Iyunidi | Ukucaciswa | Umphumela | Indlela yokuhlola |
| Ukuvela | / | Okumhlophe okuneenthoro nofana okuneenhluthu, ngaphandle kokusilaphazeka kwemitjhini | Iinhlamvu ezimhlophe, ngaphandle kokusilaphazeka kwemitjhini | GB/T 28113-2011 |
| I-Bisphenol A | Ngaphakathi/% | ≥99.85 | 99.925 | GB/T 28113-2011 |
| I-Phenol | Ngaphakathi/% | ≤0.005 | 0.001 | GB/T 28113-2011 |
| 2,4-Isomer | Ngaphakathi/% | ≤0.050 | 0.01 | GB/T 28113-2011 |
| Iphuzu lekristalu | °C | ≥156.6 | 157.2 | GB/T 28113-2011 |
| I-Chroma encibilikisiweko | Umbala, i-Pt-Co (Iyunithi ye-Hazen) | ≤20 | 10 | GB/T 28113-2011 |
| Isisombululo se-Chroma | Umbala, i-Pt-Co (Iyunithi ye-Hazen) | / | 5 | GB/T 28113-2011 |
| Umswakamo | Ngaphakathi/% | ≤0.08 | 0.02 | GB/T 6283-2008 |