20.500.12556/DKUM-17025 SINTEZA NATRIJEVEGA BENZOATA SYNTHESIS OF SODIUM BENZOATE Opravili smo industrijsko raziskovalno delo, sintetizirali smo natrijev benzoat za podjetje Henkel Slovenija d.o.o., saj le tega uporabljajo kot konzervans v kozmetičnih izdelkih, prav tako se uporablja tudi v živilski industriji kot dodatek hrani. Natrijev benzoat (NaC6H5CO2) smo sintetizirali iz natrijevega hidroksida (NaOH) in benzojske kisline (C7H6O2) v šaržnem mešalnem reaktorju pri različnih temperaturah: NaOH + C7H6O2 → NaC6H5CO2 + H2O Zaželjeno je bilo kontinuirno spremljanje spreminjanja koncentracije reaktanta, zato smo poskusili z merjenjem električne specifične prevodnosti. Z merjenjem specifične prevodnosti in z uporabo teorije o močnih elektrolitih smo določili funkcijsko zvezo koncentracije v odvisnosti od časa in določili presnovo reakcije. Prav tako smo sintezo analizirali s titracijo in tudi dobili analogne rezultate kot pri merjenju specifične prevodnosti. Dobljeni produkt smo identificirali z infrardečo (IR) spektroskopijo, ga primerjali s standardom natrijevega benzoata in ugotovili, da mu povsem ustreza. V podjetju Henkel Slovenija d.o.o. bodo še sledile nadaljne raziskave proizvodnje natrijevega benzoata, ki bodo prav tako strogo zaupne. We carried out an industrial research work, where we synthesized sodium benzoate for Henkel Slovenia Ltd., since they use this as a preservative in cosmetics, and it is also used in the food industry as food additive. Synthesis of sodium benzoate (NaC6H5CO2) was carried out from sodium hydroxide (NaOH) and benzoic acid (C7H6O2) in the batch stirred reactor at different temperatures: NaOH + C7H6O2 → NaC6H5CO2 + H2O Desirable was following-up continuing changing of reactant concentration, therefore we tried with measuring of electrical conductivity. With measuring the conductivity and by using the theory of strong electrolytes, we determined the functional relationship of concentration versus time and thereby determine metabolism of reaction. We also analyzed the synthesis by using the titration and also got analogous results. In the end we obtained a product identified by infrared (IR) spectroscopy. In the company Henkel Slovenia Ltd., further researches on production of sodium benzoate will follow, which will also be, strictly confidential. sinteza natrijevega benzoata močni elektroliti električna specifična prevodnost infrardeča spektroskopija (IR) synthesis of sodium benzoate strong elektrolytes electrical specifical conductivity infrared spectroscopy (IR) true true false [M. Mlinarič] Slovenski jezik Angleški jezik Diplomsko delo 2010-12-13 21:30:35 2010-12-14 13:11:39 2022-04-13 09:07:40 2023-12-21 03:29:18 2010 0 Maribor 0 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 661.8'078.2(043.2) 14790678 URN:SI:UM:DK:1FD78H8C UNI_Mlinaric_Martina_2010.pdf UNI_Mlinaric_Martina_2010.pdf 1 60B1E6C6B52FCCB623827DDEE1B8E222 eccd3d307c6c91e4bb15f4d5fc4fe1f410753176acd637aa01e007c6dcea4bf3 c9df1293-7c04-11eb-bb7a-00155d0001ca 20.500.12556/dkum/2821a376-c47c-4e72-9f96-7f8d11a1d682 https://dk.um.si/Dokument.php?lang=slv&id=19608 Fakulteta za kemijo in kemijsko tehnologijo 0 0 0