Študij formulacij vodikovega peroksida z mlečno in dodecilbenzensulfonsko kislino

Jere, Matic (author), Cerkovnik, Janez (mentor)

V diplomskem delu sem raziskoval nastanek peroksimlečne in peroksidodecil-benzensulfonske kisline v formulacijah, pripravljenih iz različnih razmerij vodikovega peroksida in mlečne kisline, oziroma dodecilbenzensulfonske kisline (DBSA). Za pripravo sem uporabljal 40% in 60% vodikov peroksid. Študiral sem tudi vpliv dodatka žveplove(VI) kisline kot katalizatorja. Ugotovil sem, da so glede na delež nastale peroksi kisline in stabilnost le-te, formulacije z mlečno kislino bolj perspektivne od tistih z DBSA. Raztopine sem dodatno testiral s toplotno obremenitvijo pri 60 °C tri dni z namenom simulacije pogojev hranjenja takšnih formulacij v daljšem časovnem obdobju. V teh primerih sem raztopine dodatno stabiliziral s HEDP. Rezultati kažejo, da v formulaciji z 20% začetnim deležem mlečne kisline in 40% vodikovim peroksidom ob dodatku katalizatorja nastane najvišji delež peroksimlečne kisline, ki je tudi relativno stabilna, zato lahko predstavlja izhodiščno točko za nadaljnje študije.

• Language: Slovenian
• Keywords: Peroksi kisline, vodikov peroksid, mlečna kislina, dodecilbenzensulfonska kislina, peroksimlečna kislina, peroksidodecilbenzensulfonska kislina
• Work type: Bachelor thesis/paper
• Typology: 2.11 - Undergraduate Thesis
• Organization: FKKT - Faculty of Chemistry and Chemical Technology
• Year: 2023
• PID: 20.500.12556/RUL-149330
• COBISS.SI-ID: 168118275
• Publication date in RUL: 06.09.2023

Secondary language

• Language: English
• Title: Study of formulations of hydrogen peroxide with lactic and dodecylbenzenesulfonic acids

Abstract

In my thesis, I investigated the formation of peroxylactic acid and peroxydodecylbenzenesulfonic acid in formulations prepared from different proportions of hydrogen peroxide and lactic acid or dodecylbenzenesulfonic acid (DBSA). I studied solutions containing 40% and 60% hydrogen peroxide and the effects of adding sulfuric acid as a catalyst. I found that the formulations with lactic acid were more promising than those with DBSA in terms of the percentage of peroxyacid formed and their stability. To simulate the storage conditions of such formulations over a longer period of time, I also thermally loaded the solutions at 60 °C for three days. In these cases, I additionally stabilized the solutions with HEDP. The results show that in the formulation with an initial ratio of 20% lactic acid and 40% hydrogen peroxide, the highest proportion of peroxylactic acid is formed after addition of the catalyst, which is also relatively stable, so that it can be a starting point for further studies.

• Keywords: Peroxy acids, hydrogen peroxide, lactic acid, dodecylbenzenesulfonic acid, peroxylactic acid, peroxydodecylbenzenesulfonic acid