Makani
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Ino bisphenol A BPA ilapandululwa biyeni?
Kulanga-langa Bisphenol A BPA Kumatalikilo yakapangwa mu 1936 mbuli estrogen, bisphenol A (BPA) lino ilapangwa amweelwe uuyinda ku 6 billion pounds. Bisphenol A BPA ilabelesyegwa kapati mbuli bbwe lyakuyaka mapulasitiki aa polycarbonate, alo aajanika muzintu zilimbuli b...Bala zyiingi -
Ino nzintu nzi zibelesyegwa a bisphenol A?
polycarbonate antoomwe a epoxy resins. Alimwi chibelesegwa mukupanga mapulasitiki mapati mbuli polysulfone, antoomwe a tetrabromobisphenol A, eeyo iibelesyegwa kapati mbuli chintu chilesya mulilo. Polycarbonate (mubelesyi mupati wa bisphenol A) nchintu chitakwe bubotu, chitakwe kununkilila, chitakwe ntenda, alimwi nchintu chiinda...Bala zyiingi -
ino bisphenol a bpa ibelesyegwaanzi?
Bisphenol a bpa ilabelesyegwa kapati mukupanga zintu zyiingi zya polymer, zilimbuli epoxy resins, polycarbonates, polysulfones, phenolic unsaturated resins, polyphenylene ether resins, polyaryl compounds, polyetherimides, tetrabromobisphenol A, PVC heat stabilizers, agribercuidants antioxidants...Bala zyiingi -
Ino nkuli buti kwa bisphenol a?
Bisphenol A (BPA), alimwi wiitwa kuti diphenylolpropane naa (4-hydroxyphenyl)propane, ulapanga mabwe aasalala mu ethanol iitakwe busani alimwi amabwe aali mbuli nyeleti mumaanzi. Ulakonzya kupya mpo ulaa tununkilizyo tusyoonto twa phenolic. Busena bwakunyenguluka bwayo buli 157.2°C, busena bwakupya buli 79.4°C, mpawo busena bwakubila bwa bisphenol a mbu 2...Bala zyiingi -
Ino Bisphenol A ninzi?
Bisphenol A (bpa) Makani Aantalisyo Bisphenol A, alimwi wiitwa kuti BPA, musamu uuzwa mumubili uujisi foomu ya C₁₅H₁₆O₂. Mumakwebo, chibelesyegwa mukupanga zintu zilimbuli polycarbonate (PC) antoomwe a epoxy resins. Kuzwa kuliba 1960, BPA yakabelesegwa mukupanga mapulasitiki...Bala zyiingi -
Ino mbuti mbotukonzya kugwisya mubala wa sodium hydrosulfite?
Nzila yakugwisya mabala aazwa kuzisani zituba Nzila yakusowela inkomeki ya sodium hydrosulfite Kuti kakuli mabala aajanika, kobelesya nkomeki iijisi ma gradu. Tila mweelwe umwi wamaanzi apya (atala a 90°C) munkomeki. Kosanzya sodium hydrosulfite (kuvwula kwa 2.5%) mpawo kovwungulula kuti inyonyooke. Bbila...Bala zyiingi -
Ino ninzila nzi zyakubako kwa sodium dithionite?
Bube bwamubili: Sodium dithionite ili muchibaka chaGrede 1 chakupya. Alimwi ilizyibidwe kuti Rongalite Mumakwebo, ili munzila zyobile: Na₂S₂O₄·2H₂O antoomwe a Na₂S₂O₄ iitakwe maanzi. Chakusanguna nchintu chituba chibotu, mpawo chakumamanino nchintu chisalala pyu. Bupati bwayo mbu...Bala zyiingi -
Chintu chigwisya: Sodium Hydrosulfite
Chintu chichesya: Sodium Hydrosulfite Zina lyamakemikalu: Sodium dithionite. Kweezyanisya azintu zipa kuti kube muya, sodium hydrosulfite tainyonganyi pe zisani. ilakonzya kubelesegwa kuzisani zipangidwe aamasusu aasiyene-siyene kakunyina kuchisa, aboobo zina lyakuti "hydrosulfite" (kwaamba kuti nchintu chikwabilidwe). Cho...Bala zyiingi -
Ino mulimo nzi wa sodium hydrosulfite mumisela yazisani?
Insinga zibotu zya sodium hydrosulfite sodium hydrosulfite ileelela ku nsingo zyamasani zisiyene, aboobo zina lyayo lyakuti "Rongalite." Eelyo nozibelesyegwa kusanzya naa kugwisya mabala, nsinga zyacisani zyeelede kuti kazikonzya kuliyumya kukupya kapati kakunyina kunyonyooka. Kweelana akuzumizya...Bala zyiingi -
Ino ntenda nzi zya sodium hydrosulfite?
Sodium hydrosulfite ili abuti alimwi ilakonzya kunyonganya meso anzila yakuyoya. Chibelesyegwa kapati mumakwebo aazisani mukudaya, kusalazya, kusimba, kugwisya mubala, akusanzya silika, boya bwambelele, nayiloni, azimwi zisani. Mbuli mbokutakwe nsimbi zilemu, zisani zyakasanzigwa...Bala zyiingi -
Ninzi chiyoochitika kuti sodium hydrosulfite yabikkwa mumuwo?
Kuti yabikkwa mumuwo, sodium hydrosulfite ilafwambaana kuyoya muya mubotu mpawo ilasanduka. Alimwi ilanyona busi, kupa kuti kube kupya akusololela kukunyonyooka. ilakonzya kubungana antoomwe kumwi kainywa muya uuzwa mumulengalenga mpawo igwisye kununkilila kupati kwa asidi. Na₂S₂O₄ + 2H₂O + O₂ → 2NaHSO₄ + 2[H] Kupya naa kuvwumbililwa...Bala zyiingi -
Ino nzintu nzi ziboneka zya sodium hydrosulfite?
Bube bwa Sodium hydrosulfite Bube bwa Sodium hydrosulfite buli muchiinga chaGrede 1 bukonzya kupya, alimwi buzyibidwe kuti sodium dithionite. Ulajanwa mumakwebo munzila zyobile: uujisi maanzi (Na₂S₂O₄·2H₂O) alimwi uutakwe maanzi (Na₂S₂O₄). Chiimo chamaanzi chilibonya mbuli bbwe lituba libotu...Bala zyiingi