Concentrating sodium hydroxide by electrodialysis after the mercerization step

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F28676092%3A_____%2F17%3AN0000021" target="_blank" >RIV/28676092:_____/17:N0000021 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Concentrating sodium hydroxide by electrodialysis after the mercerization step

Popis výsledku v původním jazyce

The aim of this work was to investigate the possibility of the sodium hydroxide solution treatment after the mercerisation process. Mercerisation is a process at which a tissue is treated by concentrated sodium hydroxide for a short time and subsequently washing with both cold and hot water streams. Demineralization (concentrating) was conducted on pure solution of NaOH by laboratory equipment EDR-Z 10/0.8 using polypropylene based membranes Ralex® CM-PP as cation exchanger and AM-PP as anion exchanger. Different concentrations (1%, 3%, 9%) of NaOH solutions were examined as diluate, while concentrate chamber was 9% NaOH, and 3% NaOH was used as the electrode solution. The electrodialysis was configured so that when an electric field is applied Na+ and OH- ions are transferred through the membranes into the concentrate chamber. The efficiency of the electrodialysis was further optimized by study the parameters such as: mass flux, current efficiency, electrical charge, linear flow, energy consumption. The final concentrate solution conductivity was in the range of 310-350 mS/cm (corresponding to 9-11%) during all tests. Furthermore, since the electrochemical properties of the membranes play an important role in electrodialysis efficiency the resistivity and permselectivity of the membranes were measured before and after the electrodialysis process.

Název v anglickém jazyce

Concentrating sodium hydroxide by electrodialysis after the mercerization step

Popis výsledku anglicky

The aim of this work was to investigate the possibility of the sodium hydroxide solution treatment after the mercerisation process. Mercerisation is a process at which a tissue is treated by concentrated sodium hydroxide for a short time and subsequently washing with both cold and hot water streams. Demineralization (concentrating) was conducted on pure solution of NaOH by laboratory equipment EDR-Z 10/0.8 using polypropylene based membranes Ralex® CM-PP as cation exchanger and AM-PP as anion exchanger. Different concentrations (1%, 3%, 9%) of NaOH solutions were examined as diluate, while concentrate chamber was 9% NaOH, and 3% NaOH was used as the electrode solution. The electrodialysis was configured so that when an electric field is applied Na+ and OH- ions are transferred through the membranes into the concentrate chamber. The efficiency of the electrodialysis was further optimized by study the parameters such as: mass flux, current efficiency, electrical charge, linear flow, energy consumption. The final concentrate solution conductivity was in the range of 310-350 mS/cm (corresponding to 9-11%) during all tests. Furthermore, since the electrochemical properties of the membranes play an important role in electrodialysis efficiency the resistivity and permselectivity of the membranes were measured before and after the electrodialysis process.

Druh

D - Stať ve sborníku

CEP obor

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OECD FORD obor

20402 - Chemical process engineering

Projekt

<a href="/cs/project/QJ1510341" target="_blank" >QJ1510341: Nové technologické postupy s využitím membránových procesů poskytující nové potravinářské produkty se zlepšenými nutričními a uživatelskými vlastnostmi</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2017

Kód důvěrnosti údajů

C - Předmět řešení projektu podléhá obchodnímu tajemství (§ 504 Občanského zákoníku), ale název projektu, cíle projektu a u ukončeného nebo zastaveného projektu zhodnocení výsledku řešení projektu (údaje P03, P04, P15, P19, P29, PN8) dodané do CEP, jsou upraveny tak, aby byly zveřejnitelné.

Název statě ve sborníku

44th International Conference of the Slovak Society of Chemical Engineering

ISBN

978-80-89597-58-1

ISSN

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e-ISSN

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Počet stran výsledku

6

Strana od-do

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Název nakladatele

Slovenská spoločnosť chemického inžinierstva

Místo vydání

Slovenská republika

Místo konání akce

Nízké Tatry, Slovenská republika

Datum konání akce

22. 5. 2017

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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