Comparison studies on lauric acid ethoxylated using homogenous and heterogenous catalysts

Zarina Edris, Norhafipah Mohamad, Mohd. Ambar Yarmo

Research output: Contribution to journalArticle

Abstract

The application of homogenous and heterogeneous catalysts for ethoxylation of lauric acid (LAC) with ethylene oxide (EO) was conducted in this study. Ethoxylation reaction of LAc with EO with the mole ratio 1:3 (LAC:EO) have been done at reaction temperature 130-135°C under 1.8 bar pressure to produce Ethoxylated Lauric Acid (LAC:3EO), a type of nonionic surfactant. This experiment showed that potassium tert-butoxide ('BuOK) as a base homogenous catalyst gave good selectivity and activity compared with potassium methoxide, potassium ethoxide and potassium butoxide. Studies on intercalation of hydrotalcite (HT) with 'BuO' to form HT'BuO as solid base catalyst was conducted. Ethoxylation reaction using heterogenous catalyst based on intercalated of HT-tBuO gave lower activity compared with 'BuOK as homogenous catalyst. This might be due to diffusion which occurred significantly in heterogenous catalyst compared with homogenous catalyst. Analysis of nonionic surfactant LAC: 3EO using HT'BuO as a catalyst gave no undesired side product. Detail analysis of the reaction products using GC-Tof technique gave a mixture of ester of LAC: 3EO and polyethylene glycol (PEG).

Original languageEnglish
Pages (from-to)765-768
Number of pages4
JournalSains Malaysiana
Volume39
Issue number5
Publication statusPublished - Oct 2010

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lauric acid
hydrotalcite
Catalysts
Ethylene Oxide
Potassium
Nonionic surfactants
Catalyst selectivity
Intercalation
Reaction products

Keywords

  • Ethoxylated lauric acid
  • Hydrotalcite
  • Intercalation
  • Nonionic surfactant tert-butoxide

ASJC Scopus subject areas

  • General

Cite this

Comparison studies on lauric acid ethoxylated using homogenous and heterogenous catalysts. / Edris, Zarina; Mohamad, Norhafipah; Yarmo, Mohd. Ambar.

In: Sains Malaysiana, Vol. 39, No. 5, 10.2010, p. 765-768.

Research output: Contribution to journalArticle

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